:Product: 3-Day Forecast
:Issued: 2026 Mar 29 0030 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
A. NOAA Geomagnetic Activity Observation and Forecast

The greatest observed 3 hr Kp over the past 24 hours was 3 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for Mar 29-Mar 31 2026 is 4.67 (NOAA Scale
G1).

NOAA Kp index breakdown Mar 29-Mar 31 2026

Mar 29 Mar 30 Mar 31
00-03UT 2.33 3.67 3.67
03-06UT 1.67 4.67 (G1) 3.00
06-09UT 1.00 3.00 2.67
09-12UT 0.67 2.33 2.00
12-15UT 1.67 2.33 2.00
15-18UT 2.33 2.33 2.33
18-21UT 2.67 3.00 2.67
21-00UT 3.00 3.67 2.67

Rationale: G1 (Minor) geomagnetic storming is likely on 30 Mar in
response to +CH HSS influences.

B. NOAA Solar Radiation Activity Observation and Forecast

Solar radiation, as observed by NOAA GOES-18 over the past 24 hours, was
below S-scale storm level thresholds.

Solar Radiation Storm Forecast for Mar 29-Mar 31 2026

Mar 29 Mar 30 Mar 31
S1 or greater 5% 5% 5%

Rationale: No S1 (Minor) or greater solar radiation storms are expected.
No significant active region activity favorable for radiation storm
production is forecast.

C. NOAA Radio Blackout Activity and Forecast

Radio blackouts reaching the R1 levels were observed over the past 24
hours. The largest was at Mar 28 2026 0418 UTC.

Radio Blackout Forecast for Mar 29-Mar 31 2026

Mar 29 Mar 30 Mar 31
R1-R2 50% 50% 50%
R3 or greater 10% 10% 10%

Rationale: There is a chance for R1-R2 (Minor-Moderate) radio blackouts,
and a slight chance for an R3 (Strong) event, on 29-31 Mar.


--- MBSE BBS v1.1.7.2 (Linux-x86_64)
* Origin: Outpost BBS * Johnson City, TN (618:618/1)

:Product: 3-Day Forecast
:Issued: 2026 Apr 01 0030 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
A. NOAA Geomagnetic Activity Observation and Forecast

The greatest observed 3 hr Kp over the past 24 hours was 3 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for Apr 01-Apr 03 2026 is 6.33 (NOAA Scale
G2).

NOAA Kp index breakdown Apr 01-Apr 03 2026

Apr 01 Apr 02 Apr 03
00-03UT 3.00 4.33 3.67
03-06UT 5.67 (G2) 4.00 3.33
06-09UT 6.33 (G2) 3.33 3.00
09-12UT 4.67 (G1) 2.33 3.00
12-15UT 4.33 3.00 3.00
15-18UT 4.00 4.67 (G1) 3.00
18-21UT 4.67 (G1) 4.33 3.33
21-00UT 3.67 4.67 (G1) 3.67

Rationale: G2 (Moderate) geomagnetic storming levels are likely with a
chance for isolated G3 (Strong) storm levels possible 01 Apr due to
effects from the CME associated with 30 Mar X1.4 major flare event.
Active to G1 (Minor) levels are anticipated to continue into 02 Apr as
CME effects wane alongside the forecasted onset of CH HSS activity which
is likely to cause unsettled to active levels on 03 Apr.

B. NOAA Solar Radiation Activity Observation and Forecast

Solar radiation, as observed by NOAA GOES-18 over the past 24 hours, was
below S-scale storm level thresholds.

Solar Radiation Storm Forecast for Apr 01-Apr 03 2026

Apr 01 Apr 02 Apr 03
S1 or greater 15% 15% 15%

Rationale: There is a slight chance for the greater than 10 MeV proton
flux to exceed S1 (Minor) solar radiation storm levels through 03 Apr
due to the X1.4 flare at 30/0319 UTC and anticipated arrival of its
associated CME alongside the complexity and evolution of the active
regions currently on the solar disk.

C. NOAA Radio Blackout Activity and Forecast

No radio blackouts were observed over the past 24 hours.

Radio Blackout Forecast for Apr 01-Apr 03 2026

Apr 01 Apr 02 Apr 03
R1-R2 55% 55% 55%
R3 or greater 20% 20% 20%

Rationale: Solar activity is likely to reach Minor-Moderate (R1-R2)
levels, with a slight chance for X-class flares (R3/Strong) through 03
Apr due to the complexity and evolution of the active regions currently
on the solar disk.


--- MBSE BBS v1.1.7.2 (Linux-x86_64)
* Origin: Outpost BBS * Johnson City, TN (618:618/1)

:Product: 3-Day Forecast
:Issued: 2026 Apr 05 0030 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
A. NOAA Geomagnetic Activity Observation and Forecast

The greatest observed 3 hr Kp over the past 24 hours was 5 (NOAA Scale
G1).
The greatest expected 3 hr Kp for Apr 05-Apr 07 2026 is 3.67 (below NOAA
Scale levels).

NOAA Kp index breakdown Apr 05-Apr 07 2026

Apr 05 Apr 06 Apr 07
00-03UT 3.67 2.67 2.67
03-06UT 3.33 3.00 2.67
06-09UT 3.00 2.67 2.67
09-12UT 3.00 2.67 2.00
12-15UT 2.67 2.00 0.67
15-18UT 2.00 1.67 0.67
18-21UT 2.00 1.67 1.67
21-00UT 2.67 2.67 2.67

Rationale: No G1 (Minor) or greater geomagnetic storms are expected. No significant transient or recurrent solar wind features are forecast.

B. NOAA Solar Radiation Activity Observation and Forecast

Solar radiation, as observed by NOAA GOES-18 over the past 24 hours, was
below S-scale storm level thresholds.

Solar Radiation Storm Forecast for Apr 05-Apr 07 2026

Apr 05 Apr 06 Apr 07
S1 or greater 20% 20% 20%

Rationale: There is a slight chance for the greater than 10 MeV proton
flux to exceed S1 (Minor) solar radiation storm levels over 05-07 Apr.

C. NOAA Radio Blackout Activity and Forecast

Radio blackouts reaching the R2 levels were observed over the past 24
hours. The largest was at Apr 04 2026 0117 UTC.

Radio Blackout Forecast for Apr 05-Apr 07 2026

Apr 05 Apr 06 Apr 07
R1-R2 55% 55% 55%
R3 or greater 20% 20% 20%

Rationale: R1-R2 (Minor-Moderate) radio blackouts are likely, with a
slight chance for an isolated R3 (Strong) event, over 05-07 Apr, driven primarily by the flare potential of Region 4409.


--- MBSE BBS v1.1.7.2 (Linux-x86_64)
* Origin: Outpost BBS * Johnson City, TN (618:618/1)

:Product: 3-Day Forecast
:Issued: 2026 Apr 08 0030 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
A. NOAA Geomagnetic Activity Observation and Forecast

The greatest observed 3 hr Kp over the past 24 hours was 3 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for Apr 08-Apr 10 2026 is 5.00 (NOAA Scale
G1).

NOAA Kp index breakdown Apr 08-Apr 10 2026

Apr 08 Apr 09 Apr 10
00-03UT 2.33 3.33 2.33
03-06UT 2.00 3.00 5.00 (G1)
06-09UT 1.67 1.67 4.67 (G1)
09-12UT 1.33 1.00 3.67
12-15UT 0.67 0.67 2.67
15-18UT 2.00 1.33 2.67
18-21UT 2.33 1.33 3.67
21-00UT 3.00 1.67 4.00

Rationale: G1 (Minor) or greater geomagnetic storms are likely on 10 Apr
due to a new positive polarity coronal hole stream influence.

B. NOAA Solar Radiation Activity Observation and Forecast

Solar radiation, as observed by NOAA GOES-18 over the past 24 hours, was
below S-scale storm level thresholds.

Solar Radiation Storm Forecast for Apr 08-Apr 10 2026

Apr 08 Apr 09 Apr 10
S1 or greater 10% 10% 10%

Rationale: There is a slight chance for the greater than 10 MeV proton
flux to exceed S1 (Minor) solar radiation storm levels 08-10 Apr.

C. NOAA Radio Blackout Activity and Forecast

No radio blackouts were observed over the past 24 hours.

Radio Blackout Forecast for Apr 08-Apr 10 2026

Apr 08 Apr 09 Apr 10
R1-R2 35% 35% 35%
R3 or greater 10% 10% 10%

Rationale: There is a chance for R1-R2 (Minor-Moderate) radio blackouts,
with a slight chance for R3 (Strong) or greater events 08-10 Apr.


--- MBSE BBS v1.1.7.2 (Linux-x86_64)
* Origin: Outpost BBS * Johnson City, TN (618:618/1)

:Product: 3-Day Forecast
:Issued: 2026 Apr 11 0030 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
A. NOAA Geomagnetic Activity Observation and Forecast

The greatest observed 3 hr Kp over the past 24 hours was 4 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for Apr 11-Apr 13 2026 is 4.67 (NOAA Scale
G1).

NOAA Kp index breakdown Apr 11-Apr 13 2026

Apr 11 Apr 12 Apr 13
00-03UT 3.67 3.67 2.67
03-06UT 4.67 (G1) 3.67 2.67
06-09UT 4.00 3.67 3.00
09-12UT 4.00 2.67 2.67
12-15UT 3.00 2.67 1.67
15-18UT 2.67 1.67 1.67
18-21UT 4.00 2.67 2.00
21-00UT 4.67 (G1) 3.00 2.67

Rationale: Periods of G1 (Minor) storm levels are expected on 11 Apr due
to +CH HSS influences.

B. NOAA Solar Radiation Activity Observation and Forecast

Solar radiation, as observed by NOAA GOES-18 over the past 24 hours, was
below S-scale storm level thresholds.

Solar Radiation Storm Forecast for Apr 11-Apr 13 2026

Apr 11 Apr 12 Apr 13
S1 or greater 1% 1% 1%

Rationale: No S1 (Minor) or greater solar radiation storms are expected.
No significant active region activity favorable for radiation storm
production is forecast.

C. NOAA Radio Blackout Activity and Forecast

No radio blackouts were observed over the past 24 hours.

Radio Blackout Forecast for Apr 11-Apr 13 2026

Apr 11 Apr 12 Apr 13
R1-R2 5% 5% 5%
R3 or greater 1% 1% 1%

Rationale: No R1 (Minor) or greater radio blackouts are expected. No significant active region flare activity is forecast.


--- MBSE BBS v1.1.7.2 (Linux-x86_64)
* Origin: Outpost BBS * Johnson City, TN (618:618/1)

:Product: 3-Day Forecast
:Issued: 2026 Apr 14 0030 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
A. NOAA Geomagnetic Activity Observation and Forecast

The greatest observed 3 hr Kp over the past 24 hours was 1 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for Apr 14-Apr 16 2026 is 4.00 (below NOAA
Scale levels).

NOAA Kp index breakdown Apr 14-Apr 16 2026

Apr 14 Apr 15 Apr 16
00-03UT 1.67 2.67 1.67
03-06UT 2.67 3.00 2.67
06-09UT 1.67 4.00 2.67
09-12UT 1.67 2.67 2.33
12-15UT 1.00 2.67 1.67
15-18UT 0.67 1.67 1.67
18-21UT 1.67 1.67 1.67
21-00UT 2.00 2.00 2.33

Rationale: No G1 (Minor) or greater geomagnetic storms are expected. No significant transient or recurrent solar wind features are forecast.

B. NOAA Solar Radiation Activity Observation and Forecast

Solar radiation, as observed by NOAA GOES-18 over the past 24 hours, was
below S-scale storm level thresholds.

Solar Radiation Storm Forecast for Apr 14-Apr 16 2026

Apr 14 Apr 15 Apr 16
S1 or greater 1% 1% 1%

Rationale: No S1 (Minor) or greater solar radiation storms are expected.
No significant active region activity favorable for radiation storm
production is forecast.

C. NOAA Radio Blackout Activity and Forecast

No radio blackouts were observed over the past 24 hours.

Radio Blackout Forecast for Apr 14-Apr 16 2026

Apr 14 Apr 15 Apr 16
R1-R2 10% 10% 10%
R3 or greater 1% 1% 1%

Rationale: There is a slight chance for R1-R2 (Minor-Moderate) radio
blackouts on 14-16 Apr.


--- MBSE BBS v1.1.7.2 (Linux-x86_64)
* Origin: Outpost BBS * Johnson City, TN (618:618/1)

:Product: 3-Day Forecast
:Issued: 2026 Apr 16 1230 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
A. NOAA Geomagnetic Activity Observation and Forecast

The greatest observed 3 hr Kp over the past 24 hours was 2 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for Apr 16-Apr 18 2026 is 6.00 (NOAA Scale
G2).

NOAA Kp index breakdown Apr 16-Apr 18 2026

Apr 16 Apr 17 Apr 18
00-03UT 0.67 2.33 6.00 (G2)
03-06UT 1.00 2.67 6.00 (G2)
06-09UT 1.00 2.67 5.00 (G1)
09-12UT 0.67 2.00 4.00
12-15UT 1.67 1.33 3.67
15-18UT 1.67 2.67 3.33
18-21UT 1.67 4.33 3.00
21-00UT 2.33 5.67 (G2) 4.33

Rationale: G1-G2 (Minor-Moderate) geomagnetic storms are likely on 17-18
Apr due to the anticipated arrival of a negative polarity CH HSS CIR.

B. NOAA Solar Radiation Activity Observation and Forecast

Solar radiation, as observed by NOAA GOES-18 over the past 24 hours, was
below S-scale storm level thresholds.

Solar Radiation Storm Forecast for Apr 16-Apr 18 2026

Apr 16 Apr 17 Apr 18
S1 or greater 1% 1% 1%

Rationale: No S1 (Minor) or greater solar radiation storms are expected.
No significant active region activity favorable for radiation storm
production is forecast.

C. NOAA Radio Blackout Activity and Forecast

No radio blackouts were observed over the past 24 hours.

Radio Blackout Forecast for Apr 16-Apr 18 2026

Apr 16 Apr 17 Apr 18
R1-R2 30% 30% 30%
R3 or greater 5% 5% 5%

Rationale: There is a chance for R1-R2 (Minor-Moderate) radio blackouts
through 18 Apr, mostly due to the flare potential of Region 4419.


--- MBSE BBS v1.1.7.2 (Linux-x86_64)
* Origin: Outpost BBS * Johnson City, TN (618:618/1)

:Product: 3-Day Forecast
:Issued: 2026 Apr 20 0030 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
A. NOAA Geomagnetic Activity Observation and Forecast

The greatest observed 3 hr Kp over the past 24 hours was 6 (NOAA Scale
G2).
The greatest expected 3 hr Kp for Apr 20-Apr 22 2026 is 4.00 (below NOAA
Scale levels).

NOAA Kp index breakdown Apr 20-Apr 22 2026

Apr 20 Apr 21 Apr 22
00-03UT 3.67 3.33 2.67
03-06UT 3.67 4.00 2.00
06-09UT 3.33 3.00 2.33
09-12UT 3.33 2.67 2.00
12-15UT 3.33 2.33 2.00
15-18UT 2.00 3.00 2.33
18-21UT 3.33 2.67 2.00
21-00UT 3.33 2.33 2.00

Rationale: No G1 (Minor) or greater geomagnetic storms are expected as
the CH HSS ongoing effect wanes.

B. NOAA Solar Radiation Activity Observation and Forecast

Solar radiation, as observed by NOAA GOES-18 over the past 24 hours, was
below S-scale storm level thresholds.

Solar Radiation Storm Forecast for Apr 20-Apr 22 2026

Apr 20 Apr 21 Apr 22
S1 or greater 1% 1% 1%

Rationale: No S1 (Minor) or greater solar radiation storms are expected.
No significant active region activity favorable for radiation storm
production is forecast.

C. NOAA Radio Blackout Activity and Forecast

No radio blackouts were observed over the past 24 hours.

Radio Blackout Forecast for Apr 20-Apr 22 2026

Apr 20 Apr 21 Apr 22
R1-R2 5% 5% 5%
R3 or greater 1% 1% 1%

Rationale: No R1 (Minor) or greater radio blackouts are expected. No significant active region flare activity is forecast.


--- MBSE BBS v1.1.7.2 (Linux-x86_64)
* Origin: Outpost BBS * Johnson City, TN (618:618/1)

:Product: 3-Day Forecast
:Issued: 2026 Apr 23 0030 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
A. NOAA Geomagnetic Activity Observation and Forecast

The greatest observed 3 hr Kp over the past 24 hours was 2 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for Apr 23-Apr 25 2026 is 3.00 (below NOAA
Scale levels).

NOAA Kp index breakdown Apr 23-Apr 25 2026

Apr 23 Apr 24 Apr 25
00-03UT 2.33 2.33 2.33
03-06UT 2.00 2.67 2.67
06-09UT 2.00 2.67 2.33
09-12UT 2.00 1.67 2.00
12-15UT 0.67 1.33 1.33
15-18UT 2.00 2.00 1.67
18-21UT 2.67 2.00 2.00
21-00UT 3.00 2.33 2.67

Rationale: No G1 (Minor) or greater geomagnetic storms are expected. No significant transient or recurrent solar wind features are forecast.

B. NOAA Solar Radiation Activity Observation and Forecast

Solar radiation, as observed by NOAA GOES-18 over the past 24 hours, was
below S-scale storm level thresholds.

Solar Radiation Storm Forecast for Apr 23-Apr 25 2026

Apr 23 Apr 24 Apr 25
S1 or greater 1% 1% 1%

Rationale: No S1 (Minor) or greater solar radiation storms are expected.
No significant active region activity favorable for radiation storm
production is forecast.

C. NOAA Radio Blackout Activity and Forecast

No radio blackouts were observed over the past 24 hours.

Radio Blackout Forecast for Apr 23-Apr 25 2026

Apr 23 Apr 24 Apr 25
R1-R2 10% 10% 10%
R3 or greater 1% 1% 1%

Rationale: A slight chance for R1-R2 (Minor-Moderate) radio blackouts
will persist through 25 April primarily due to the flare potential
exhibited by Region 4420.


--- MBSE BBS v1.1.7.2 (Linux-x86_64)
* Origin: Outpost BBS * Johnson City, TN (618:618/1)

:Product: 3-Day Forecast
:Issued: 2026 Apr 26 0030 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
A. NOAA Geomagnetic Activity Observation and Forecast

The greatest observed 3 hr Kp over the past 24 hours was 3 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for Apr 26-Apr 28 2026 is 4.67 (NOAA Scale
G1).

NOAA Kp index breakdown Apr 26-Apr 28 2026

Apr 26 Apr 27 Apr 28
00-03UT 4.67 (G1) 3.67 2.33
03-06UT 4.33 3.00 2.00
06-09UT 3.33 2.67 2.00
09-12UT 3.33 2.33 2.00
12-15UT 2.33 2.00 2.33
15-18UT 2.33 2.33 2.00
18-21UT 3.00 3.33 2.00
21-00UT 3.33 3.33 2.00

Rationale: Isolated G1-G2 (Minor-Moderate) geomagnetic storming
conditions are possible (G1 likely with a chance for G2)early 26 Apr in response to the arrival of the glancing CMEs.

B. NOAA Solar Radiation Activity Observation and Forecast

Solar radiation, as observed by NOAA GOES-18 over the past 24 hours, was
below S-scale storm level thresholds.

Solar Radiation Storm Forecast for Apr 26-Apr 28 2026

Apr 26 Apr 27 Apr 28
S1 or greater 10% 10% 10%

Rationale: There is a chance to exceed the S1 (Minor) solar radiation
storm thresholds due to the flare potential of Region 4419 further
beyond the western limb, and Region 4420 near the central solar
meridian.

C. NOAA Radio Blackout Activity and Forecast

Radio blackouts reaching the R1 levels were observed over the past 24
hours. The largest was at Apr 25 2026 0759 UTC.

Radio Blackout Forecast for Apr 26-Apr 28 2026

Apr 26 Apr 27 Apr 28
R1-R2 55% 55% 55%
R3 or greater 15% 15% 15%

Rationale: R1-R2 (Minor-Moderate) radio blackouts are likely, with a
slight chance for R3 (Strong or greater) events through 28 Apr,
primarily driven by the complexity of Regions 4420, 4423, and 4425.


--- MBSE BBS v1.1.7.2 (Linux-x86_64)
* Origin: Outpost BBS * Johnson City, TN (618:618/1)

:Product: 3-Day Forecast
:Issued: 2026 Apr 29 0030 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
A. NOAA Geomagnetic Activity Observation and Forecast

The greatest observed 3 hr Kp over the past 24 hours was 1 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for Apr 29-May 01 2026 is 4.00 (below NOAA
Scale levels).

NOAA Kp index breakdown Apr 29-May 01 2026

Apr 29 Apr 30 May 01
00-03UT 0.33 4.00 3.00
03-06UT 0.67 3.33 2.67
06-09UT 1.33 2.67 2.67
09-12UT 1.33 3.00 2.33
12-15UT 1.00 2.33 2.00
15-18UT 1.00 2.33 2.00
18-21UT 1.33 2.00 2.00
21-00UT 1.67 3.00 2.33

Rationale: No G1 (Minor) or greater geomagnetic storms are expected. No significant transient or recurrent solar wind features are forecast.

B. NOAA Solar Radiation Activity Observation and Forecast

Solar radiation, as observed by NOAA GOES-18 over the past 24 hours, was
below S-scale storm level thresholds.

Solar Radiation Storm Forecast for Apr 29-May 01 2026

Apr 29 Apr 30 May 01
S1 or greater 15% 15% 15%

Rationale: There is a slight chance the greater than 10 MeV proton flux
could reach S1 (Minor) levels, but is mainly expected to remain at
background levels 29-30 Apr and 01 May.

C. NOAA Radio Blackout Activity and Forecast

Radio blackouts reaching the R1 levels were observed over the past 24
hours. The largest was at Apr 28 2026 1353 UTC.

Radio Blackout Forecast for Apr 29-May 01 2026

Apr 29 Apr 30 May 01
R1-R2 70% 70% 70%
R3 or greater 20% 20% 20%

Rationale: There is a high likelihood for R1/R2 (Minor/Moderate) radio blackouts, and a slight chance for R3 (Strong or greater) events through
01 May, due primarily to the complexity of regions 4420 and 4425.


--- MBSE BBS v1.1.7.2 (Linux-x86_64)
* Origin: Outpost BBS * Johnson City, TN (618:618/1)

:Product: 3-Day Forecast
:Issued: 2026 May 02 0030 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
A. NOAA Geomagnetic Activity Observation and Forecast

The greatest observed 3 hr Kp over the past 24 hours was 4 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for May 02-May 04 2026 is 4.00 (below NOAA
Scale levels).

NOAA Kp index breakdown May 02-May 04 2026

May 02 May 03 May 04
00-03UT 2.33 2.67 2.67
03-06UT 2.33 3.00 3.00
06-09UT 3.00 4.00 2.67
09-12UT 2.67 2.67 2.67
12-15UT 2.00 2.33 1.67
15-18UT 2.00 1.67 1.67
18-21UT 1.67 1.67 0.67
21-00UT 2.67 2.67 2.67

Rationale: No G1 (Minor) or greater geomagnetic storms are expected. No significant transient or recurrent solar wind features are forecast.

B. NOAA Solar Radiation Activity Observation and Forecast

Solar radiation, as observed by NOAA GOES-18 over the past 24 hours, was
below S-scale storm level thresholds.

Solar Radiation Storm Forecast for May 02-May 04 2026

May 02 May 03 May 04
S1 or greater 1% 1% 1%

Rationale: No S1 (Minor) or greater solar radiation storms are expected.
No significant active region activity favorable for radiation storm
production is forecast.

C. NOAA Radio Blackout Activity and Forecast

No radio blackouts were observed over the past 24 hours.

Radio Blackout Forecast for May 02-May 04 2026

May 02 May 03 May 04
R1-R2 40% 40% 40%
R3 or greater 5% 5% 5%

Rationale: There exists a chance for R1-R2 (Minor-Moderate) radio
blackouts over 02-04 May due to the potential from multiple complex
regions on the Suns visible disk.


--- MBSE BBS v1.1.7.2 (Linux-x86_64)
* Origin: Outpost BBS * Johnson City, TN (618:618/1)

:Product: 3-Day Forecast
:Issued: 2026 May 05 0030 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
A. NOAA Geomagnetic Activity Observation and Forecast

The greatest observed 3 hr Kp over the past 24 hours was 6 (NOAA Scale
G2).
The greatest expected 3 hr Kp for May 05-May 07 2026 is 5.67 (NOAA Scale
G2).

NOAA Kp index breakdown May 05-May 07 2026

May 05 May 06 May 07
00-03UT 5.33 (G1) 2.67 3.33
03-06UT 5.67 (G2) 2.33 3.67
06-09UT 5.00 (G1) 2.00 3.00
09-12UT 4.00 1.33 2.33
12-15UT 3.00 1.67 2.33
15-18UT 2.33 2.33 3.33
18-21UT 2.00 2.00 3.33
21-00UT 2.67 2.67 3.67

Rationale: Isolated G1-G2 (Minor-Moderate) storming periods are possible
early on 05 May as CME/CH HSS effects persist.

B. NOAA Solar Radiation Activity Observation and Forecast

Solar radiation, as observed by NOAA GOES-19 over the past 24 hours, was
below S-scale storm level thresholds.

Solar Radiation Storm Forecast for May 05-May 07 2026

May 05 May 06 May 07
S1 or greater 5% 1% 1%

Rationale: No S1 (Minor) or greater solar radiation storms are expected.
No significant active region activity favorable for radiation storm
production is forecast.

C. NOAA Radio Blackout Activity and Forecast

Radio blackouts reaching the R1 levels were observed over the past 24
hours. The largest was at May 04 2026 0133 UTC.

Radio Blackout Forecast for May 05-May 07 2026

May 05 May 06 May 07
R1-R2 30% 30% 30%
R3 or greater 5% 5% 5%

Rationale: There is a chance for isolated R1-R2 (Minor-Moderate) radio blackouts on 05-07 May, primarily due to the flare potential of Region
4429.


--- MBSE BBS v1.1.7.2 (Linux-x86_64)
* Origin: Outpost BBS * Johnson City, TN (618:618/1)

:Product: 3-Day Forecast
:Issued: 2026 May 08 0030 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
A. NOAA Geomagnetic Activity Observation and Forecast

The greatest observed 3 hr Kp over the past 24 hours was 3 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for May 08-May 10 2026 is 4.00 (below NOAA
Scale levels).

NOAA Kp index breakdown May 08-May 10 2026

May 08 May 09 May 10
00-03UT 2.67 2.67 2.67
03-06UT 3.67 3.67 2.67
06-09UT 4.00 3.00 2.00
09-12UT 2.67 2.67 2.00
12-15UT 3.67 2.67 2.00
15-18UT 1.67 1.67 1.67
18-21UT 2.33 2.00 1.67
21-00UT 2.67 2.67 2.00

Rationale: No G1 (Minor) or greater geomagnetic storms are expected.

B. NOAA Solar Radiation Activity Observation and Forecast

Solar radiation, as observed by NOAA GOES-19 over the past 24 hours, was
below S-scale storm level thresholds.

Solar Radiation Storm Forecast for May 08-May 10 2026

May 08 May 09 May 10
S1 or greater 1% 1% 1%

Rationale: No S1 (Minor) or greater solar radiation storms are expected.
No significant active region activity favorable for radiation storm
production is forecast.

C. NOAA Radio Blackout Activity and Forecast

Radio blackouts reaching the R1 levels were observed over the past 24
hours. The largest was at May 07 2026 1514 UTC.

Radio Blackout Forecast for May 08-May 10 2026

May 08 May 09 May 10
R1-R2 45% 45% 45%
R3 or greater 10% 10% 10%

Rationale: There exists a chance for R1-R2 (Minor-Moderate) radio
blackouts, and a slight chance for R3 (Strong), over 08-10 May.


--- MBSE BBS v1.1.7.2 (Linux-x86_64)
* Origin: Outpost BBS * Johnson City, TN (618:618/1)

:Product: 3-Day Forecast
:Issued: 2026 May 11 0030 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
A. NOAA Geomagnetic Activity Observation and Forecast

The greatest observed 3 hr Kp over the past 24 hours was 2 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for May 11-May 13 2026 is 2.67 (below NOAA
Scale levels).

NOAA Kp index breakdown May 11-May 13 2026

May 11 May 12 May 13
00-03UT 1.67 1.67 1.67
03-06UT 2.67 1.67 2.67
06-09UT 2.67 1.33 2.67
09-12UT 1.67 1.33 2.33
12-15UT 1.33 1.33 2.33
15-18UT 1.33 0.67 2.00
18-21UT 2.00 1.67 2.33
21-00UT 2.67 1.67 2.67

Rationale: No G1 (Minor) or greater geomagnetic storms are expected. No significant transient or recurrent solar wind features are forecast.

B. NOAA Solar Radiation Activity Observation and Forecast

Solar radiation, as observed by NOAA GOES-19 over the past 24 hours, was
below S-scale storm level thresholds.

Solar Radiation Storm Forecast for May 11-May 13 2026

May 11 May 12 May 13
S1 or greater 20% 20% 20%

Rationale: No S1 (Minor) or greater solar radiation storms are expected.
No significant active region activity favorable for radiation storm
production is forecast.

C. NOAA Radio Blackout Activity and Forecast

Radio blackouts reaching the R2 levels were observed over the past 24
hours. The largest was at May 10 2026 1339 UTC.

Radio Blackout Forecast for May 11-May 13 2026

May 11 May 12 May 13
R1-R2 45% 45% 45%
R3 or greater 20% 20% 20%

Rationale: There exists a chance for R1-R2 (Minor-Moderate) radio
blackouts, with a slight chance for R3 (Strong), over 11-13 May.


--- MBSE BBS v1.1.7.2 (Linux-x86_64)
* Origin: Outpost BBS * Johnson City, TN (618:618/1)

:Product: 3-Day Forecast
:Issued: 2026 May 14 0030 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
A. NOAA Geomagnetic Activity Observation and Forecast

The greatest observed 3 hr Kp over the past 24 hours was 3 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for May 14-May 16 2026 is 5.67 (NOAA Scale
G2).

NOAA Kp index breakdown May 14-May 16 2026

May 14 May 15 May 16
00-03UT 3.33 4.00 4.33
03-06UT 3.00 5.67 (G2) 5.00 (G1)
06-09UT 2.33 4.00 3.67
09-12UT 2.00 3.67 3.33
12-15UT 1.67 3.67 3.33
15-18UT 2.00 3.67 3.33
18-21UT 2.67 4.00 3.33
21-00UT 3.67 3.67 3.33

Rationale: G1-G2 (Minor-Moderate) geomagnetic storms are likely on 15-16
May due to CH HSS influences.

B. NOAA Solar Radiation Activity Observation and Forecast

Solar radiation, as observed by NOAA GOES-19 over the past 24 hours, was
below S-scale storm level thresholds.

Solar Radiation Storm Forecast for May 14-May 16 2026

May 14 May 15 May 16
S1 or greater 5% 5% 5%

Rationale: No S1 (Minor) or greater solar radiation storms are expected.
No significant active region activity favorable for radiation storm
production is forecast.

C. NOAA Radio Blackout Activity and Forecast

No radio blackouts were observed over the past 24 hours.

Radio Blackout Forecast for May 14-May 16 2026

May 14 May 15 May 16
R1-R2 40% 40% 40%
R3 or greater 5% 5% 5%

Rationale: There is a chance for R1-R2 (Minor-Moderate) radio blackouts
through 16 May.


--- MBSE BBS v1.1.7.2 (Linux-x86_64)
* Origin: Outpost BBS * Johnson City, TN (618:618/1)

:Product: 3-Day Forecast
:Issued: 2026 May 17 0030 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
A. NOAA Geomagnetic Activity Observation and Forecast

The greatest observed 3 hr Kp over the past 24 hours was 6 (NOAA Scale
G2).
The greatest expected 3 hr Kp for May 17-May 19 2026 is 5.00 (NOAA Scale
G1).

NOAA Kp index breakdown May 17-May 19 2026

May 17 May 18 May 19
00-03UT 3.33 3.67 4.33
03-06UT 4.00 3.33 3.67
06-09UT 4.67 (G1) 3.00 3.00
09-12UT 2.33 2.67 2.00
12-15UT 2.00 2.67 1.67
15-18UT 2.33 5.00 (G1) 2.00
18-21UT 3.00 3.33 3.00
21-00UT 3.67 3.33 3.33

Rationale: G1 (Minor) geomagnetic storms are expected on 17 May due to
the negative polarity CH HSS ongoing effects. G1 (Minor) storming levels
are likely on 18 May due to possible glancing blow of a CME from 16 May.

B. NOAA Solar Radiation Activity Observation and Forecast

Solar radiation, as observed by NOAA GOES-19 over the past 24 hours, was
below S-scale storm level thresholds.

Solar Radiation Storm Forecast for May 17-May 19 2026

May 17 May 18 May 19
S1 or greater 5% 5% 1%

Rationale: No S1 (Minor) or greater solar radiation storms are expected.
No significant active region activity favorable for radiation storm
production is forecast.

C. NOAA Radio Blackout Activity and Forecast

Radio blackouts reaching the R1 levels were observed over the past 24
hours. The largest was at May 16 2026 1742 UTC.

Radio Blackout Forecast for May 17-May 19 2026

May 17 May 18 May 19
R1-R2 40% 40% 40%
R3 or greater 5% 5% 5%

Rationale: R1-R2 (Minor-Moderate) radio blackouts are likely through 19
May due to the flare potential and evolution of the active regions on
the visible disk.


--- MBSE BBS v1.1.7.2 (Linux-x86_64)
* Origin: Outpost BBS * Johnson City, TN (618:618/1)

:Product: 3-Day Forecast
:Issued: 2026 May 20 0030 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
A. NOAA Geomagnetic Activity Observation and Forecast

The greatest observed 3 hr Kp over the past 24 hours was 4 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for May 20-May 22 2026 is 3.67 (below NOAA
Scale levels).

NOAA Kp index breakdown May 20-May 22 2026

May 20 May 21 May 22
00-03UT 2.67 2.67 2.67
03-06UT 2.33 2.00 3.67
06-09UT 2.00 2.33 2.00
09-12UT 2.00 2.33 0.67
12-15UT 2.00 2.33 1.67
15-18UT 2.00 2.33 1.67
18-21UT 2.00 2.33 2.33
21-00UT 2.00 2.67 2.33

Rationale: No G1 (Minor) or greater geomagnetic storms are expected. A
solar sector boundary crossing and positive polarity CH HSS influences
are possible through 21-22 May.

B. NOAA Solar Radiation Activity Observation and Forecast

Solar radiation, as observed by NOAA GOES-19 over the past 24 hours, was
below S-scale storm level thresholds.

Solar Radiation Storm Forecast for May 20-May 22 2026

May 20 May 21 May 22
S1 or greater 5% 5% 5%

Rationale: No S1 (Minor) or greater solar radiation storms are expected.


C. NOAA Radio Blackout Activity and Forecast

No radio blackouts were observed over the past 24 hours.

Radio Blackout Forecast for May 20-May 22 2026

May 20 May 21 May 22
R1-R2 20% 20% 25%
R3 or greater 5% 5% 5%

Rationale: There is a slight chance for R1-R2 (Minor-Moderate) radio
blackouts through 21 May, increasing to a chance on 22 May. R3 (Strong)
or greater events are not expected.


--- MBSE BBS v1.1.7.2 (Linux-x86_64)
* Origin: Outpost BBS * Johnson City, TN (618:618/1)

:Product: 3-Day Forecast
:Issued: 2026 May 23 0030 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
A. NOAA Geomagnetic Activity Observation and Forecast

The greatest observed 3 hr Kp over the past 24 hours was 3 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for May 23-May 25 2026 is 2.67 (below NOAA
Scale levels).

NOAA Kp index breakdown May 23-May 25 2026

May 23 May 24 May 25
00-03UT 2.33 1.67 1.67
03-06UT 2.67 1.67 1.33
06-09UT 2.33 1.33 1.33
09-12UT 1.67 1.33 1.33
12-15UT 1.67 1.33 1.67
15-18UT 2.00 1.33 1.33
18-21UT 2.33 1.33 1.67
21-00UT 2.33 1.67 1.33

Rationale: No G1 (Minor) or greater geomagnetic storms are expected. No significant transient or recurrent solar wind features are forecast.

B. NOAA Solar Radiation Activity Observation and Forecast

Solar radiation, as observed by NOAA GOES-19 over the past 24 hours, was
below S-scale storm level thresholds.

Solar Radiation Storm Forecast for May 23-May 25 2026

May 23 May 24 May 25
S1 or greater 5% 5% 5%

Rationale: No S1 (Minor) or greater solar radiation storms are expected.
No significant active region activity favorable for radiation storm
production is forecast.

C. NOAA Radio Blackout Activity and Forecast

Radio blackouts reaching the R1 levels were observed over the past 24
hours. The largest was at May 22 2026 1029 UTC.

Radio Blackout Forecast for May 23-May 25 2026

May 23 May 24 May 25
R1-R2 25% 25% 25%
R3 or greater 5% 5% 5%

Rationale: There is a chance for R1-R2 (Minor-Moderate) radio blackouts
over 23-25 May.


--- MBSE BBS v1.1.7.2 (Linux-x86_64)
* Origin: Outpost BBS * Johnson City, TN (618:618/1)

:Product: 3-Day Forecast
:Issued: 2026 May 26 0030 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
A. NOAA Geomagnetic Activity Observation and Forecast

The greatest observed 3 hr Kp over the past 24 hours was 3 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for May 26-May 28 2026 is 3.67 (below NOAA
Scale levels).

NOAA Kp index breakdown May 26-May 28 2026

May 26 May 27 May 28
00-03UT 1.67 2.67 3.00
03-06UT 1.67 3.67 3.67
06-09UT 2.00 3.00 3.00
09-12UT 1.67 2.67 2.67
12-15UT 1.67 2.33 2.00
15-18UT 1.67 2.00 1.67
18-21UT 2.00 2.33 2.67
21-00UT 2.00 2.67 1.67

Rationale: No G1 (Minor) or greater geomagnetic storms are expected. No significant transient or recurrent solar wind features are forecast.

B. NOAA Solar Radiation Activity Observation and Forecast

Solar radiation, as observed by NOAA GOES-19 over the past 24 hours, was
below S-scale storm level thresholds.

Solar Radiation Storm Forecast for May 26-May 28 2026

May 26 May 27 May 28
S1 or greater 50% 5% 5%

Rationale: There is a chance for S1 (Minor) or greater solar radiation
storms due to activity beyond the NW limb.

C. NOAA Radio Blackout Activity and Forecast

No radio blackouts were observed over the past 24 hours.

Radio Blackout Forecast for May 26-May 28 2026

May 26 May 27 May 28
R1-R2 35% 35% 35%
R3 or greater 5% 5% 5%

Rationale: There is a chance for R1-R2 (Minor-Moderate) radio blackouts
all three days.


--- MBSE BBS v1.1.7.2 (Linux-x86_64)
* Origin: Outpost BBS * Johnson City, TN (618:618/1)

:Product: 3-Day Forecast
:Issued: 2026 May 29 0030 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
A. NOAA Geomagnetic Activity Observation and Forecast

The greatest observed 3 hr Kp over the past 24 hours was 4 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for May 29-May 31 2026 is 4.00 (below NOAA
Scale levels).

NOAA Kp index breakdown May 29-May 31 2026

May 29 May 30 May 31
00-03UT 3.33 2.33 3.00
03-06UT 2.67 2.00 2.33
06-09UT 2.33 1.33 2.33
09-12UT 2.33 1.33 1.67
12-15UT 2.00 2.67 3.33
15-18UT 2.33 2.33 2.67
18-21UT 2.67 3.00 4.00
21-00UT 3.67 3.00 3.67

Rationale: No G1 (Minor) or greater geomagnetic storms are expected. No significant transient or recurrent solar wind features are forecast.

B. NOAA Solar Radiation Activity Observation and Forecast

Solar radiation, as observed by NOAA GOES-18 over the past 24 hours, was
below S-scale storm level thresholds.

Solar Radiation Storm Forecast for May 29-May 31 2026

May 29 May 30 May 31
S1 or greater 5% 5% 5%

Rationale: No S1 (Minor) or greater solar radiation storms are expected.
No significant active region activity favorable for radiation storm
production is forecast.

C. NOAA Radio Blackout Activity and Forecast

No radio blackouts were observed over the past 24 hours.

Radio Blackout Forecast for May 29-May 31 2026

May 29 May 30 May 31
R1-R2 40% 40% 40%
R3 or greater 5% 5% 5%

Rationale: There is a chance for R1-R2 (Minor-Moderate) radio blackouts
through 31 May.


--- MBSE BBS v1.1.7.2 (Linux-x86_64)
* Origin: Outpost BBS * Johnson City, TN (618:618/1)

:Product: 3-Day Forecast
:Issued: 2026 Jun 01 0030 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
A. NOAA Geomagnetic Activity Observation and Forecast

The greatest observed 3 hr Kp over the past 24 hours was 4 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for Jun 01-Jun 03 2026 is 4.00 (below NOAA
Scale levels).

NOAA Kp index breakdown Jun 01-Jun 03 2026

Jun 01 Jun 02 Jun 03
00-03UT 3.67 2.67 2.00
03-06UT 3.00 2.33 3.33
06-09UT 2.33 2.00 4.00
09-12UT 2.00 1.33 3.00
12-15UT 1.67 1.33 2.67
15-18UT 2.00 2.00 2.33
18-21UT 2.00 2.00 2.33
21-00UT 2.33 2.33 2.67

Rationale: No G1 (Minor) or greater geomagnetic storms are expected. No significant transient or recurrent solar wind features are forecast.

B. NOAA Solar Radiation Activity Observation and Forecast

Solar radiation, as observed by NOAA GOES-18 over the past 24 hours, was
below S-scale storm level thresholds.

Solar Radiation Storm Forecast for Jun 01-Jun 03 2026

Jun 01 Jun 02 Jun 03
S1 or greater 5% 5% 1%

Rationale: No S1 (Minor) or greater solar radiation storms are expected.
No significant active region activity favorable for radiation storm
production is forecast.

C. NOAA Radio Blackout Activity and Forecast

No radio blackouts were observed over the past 24 hours.

Radio Blackout Forecast for Jun 01-Jun 03 2026

Jun 01 Jun 02 Jun 03
R1-R2 25% 25% 20%
R3 or greater 5% 5% 1%

Rationale: There is a chance for R1-R2 (Minor-Moderate) radio blackouts
on 01-02 Jun, with a slight chance for R1-R2 events on 03 Jun.


--- MBSE BBS v1.1.7.2 (Linux-x86_64)
* Origin: Outpost BBS * Johnson City, TN (618:618/1)

:Product: 3-Day Forecast
:Issued: 2026 Jun 04 0030 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
A. NOAA Geomagnetic Activity Observation and Forecast

The greatest observed 3 hr Kp over the past 24 hours was 3 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for Jun 04-Jun 06 2026 is 7.00 (NOAA Scale
G3).

NOAA Kp index breakdown Jun 04-Jun 06 2026

Jun 04 Jun 05 Jun 06
00-03UT 2.67 7.00 (G3) 4.33
03-06UT 3.00 6.33 (G2) 3.67
06-09UT 4.00 6.00 (G2) 2.67
09-12UT 2.67 4.67 (G1) 2.67
12-15UT 3.67 4.33 3.00
15-18UT 6.33 (G2) 4.67 (G1) 3.33
18-21UT 6.67 (G3) 5.00 (G1) 4.00
21-00UT 5.67 (G2) 4.33 3.67

Rationale: G2-G3 (Moderate) or greater geomagnetic storms are likely on
04-05 Jun due to a combination of CMEs that left the Sun on 03-04 Jun.

B. NOAA Solar Radiation Activity Observation and Forecast

Solar radiation, as observed by NOAA GOES-18 over the past 24 hours, was
below S-scale storm level thresholds.

Solar Radiation Storm Forecast for Jun 04-Jun 06 2026

Jun 04 Jun 05 Jun 06
S1 or greater 10% 10% 10%

Rationale: There is a slight chance for S1 (Minor) or greater solar
radiation storms over the next three days.

C. NOAA Radio Blackout Activity and Forecast

Radio blackouts reaching the R2 levels were observed over the past 24
hours. The largest was at Jun 03 2026 1127 UTC.

Radio Blackout Forecast for Jun 04-Jun 06 2026

Jun 04 Jun 05 Jun 06
R1-R2 60% 60% 60%
R3 or greater 15% 15% 15%

Rationale: R1-R2 (Minor-Moderate) radio blackouts are likely, with a
slight chance for R3 (Strong) or greater events, through 06 June.


--- MBSE BBS v1.1.7.2 (Linux-x86_64)
* Origin: Outpost BBS * Johnson City, TN (618:618/1)

:Product: 3-Day Forecast
:Issued: 2026 Jun 07 0030 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
A. NOAA Geomagnetic Activity Observation and Forecast

The greatest observed 3 hr Kp over the past 24 hours was 4 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for Jun 07-Jun 09 2026 is 7.00 (NOAA Scale
G3).

NOAA Kp index breakdown Jun 07-Jun 09 2026

Jun 07 Jun 08 Jun 09
00-03UT 3.00 2.33 6.33 (G2)
03-06UT 2.67 2.00 5.33 (G1)
06-09UT 2.67 3.00 5.00 (G1)
09-12UT 2.00 4.33 4.33
12-15UT 2.00 5.33 (G1) 3.00
15-18UT 2.00 5.67 (G2) 3.33
18-21UT 2.33 7.00 (G3) 3.33
21-00UT 2.33 6.33 (G2) 3.67

Rationale: Periods of G1-G3 (Minor-Strong) geomagnetic storming are
likely on 08 Jun, with G1-G2 (Minor-Moderate) storm periods likely on 09
Jun, following the anticipated arrival of a CME that left the Sun on 06
Jun.

B. NOAA Solar Radiation Activity Observation and Forecast

Solar radiation, as observed by NOAA GOES-18 over the past 24 hours, was
below S-scale storm level thresholds.

Solar Radiation Storm Forecast for Jun 07-Jun 09 2026

Jun 07 Jun 08 Jun 09
S1 or greater 15% 25% 10%

Rationale: There is a slight chance for S1 (Minor) solar radiation
storms on 07 and 09 Jun, with a chance for S1 levels on 08 Jun following
the anticipated shock arrival of the 06 June CME.

C. NOAA Radio Blackout Activity and Forecast

Radio blackouts reaching the R1 levels were observed over the past 24
hours. The largest was at Jun 06 2026 1401 UTC.

Radio Blackout Forecast for Jun 07-Jun 09 2026

Jun 07 Jun 08 Jun 09
R1-R2 55% 55% 55%
R3 or greater 10% 10% 10%

Rationale: R1-R2 (Minor-Moderate) radio blackouts are likely, with a
slight chance for R3 (Strong) or greater events, over 07-09 Jun.


--- MBSE BBS v1.1.7.2 (Linux-x86_64)
* Origin: Outpost BBS * Johnson City, TN (618:618/1)

:Product: 3-Day Forecast
:Issued: 2026 Jun 10 0030 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
A. NOAA Geomagnetic Activity Observation and Forecast

The greatest observed 3 hr Kp over the past 24 hours was 3 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for Jun 10-Jun 12 2026 is 4.00 (below NOAA
Scale levels).

NOAA Kp index breakdown Jun 10-Jun 12 2026

Jun 10 Jun 11 Jun 12
00-03UT 3.67 2.00 3.67
03-06UT 2.67 2.00 4.00
06-09UT 2.67 3.00 4.00
09-12UT 2.00 2.67 2.33
12-15UT 2.67 3.00 2.00
15-18UT 2.00 3.00 2.67
18-21UT 2.67 3.00 2.00
21-00UT 3.00 2.67 2.33

Rationale: No G1 (Minor) or greater geomagnetic storms are expected. No significant transient or recurrent solar wind features are forecast.

B. NOAA Solar Radiation Activity Observation and Forecast

Solar radiation, as observed by NOAA GOES-18 over the past 24 hours, was
below S-scale storm level thresholds.

Solar Radiation Storm Forecast for Jun 10-Jun 12 2026

Jun 10 Jun 11 Jun 12
S1 or greater 10% 10% 10%

Rationale: A slight chance of solar radiation storms are expected
through 12 Jun.

C. NOAA Radio Blackout Activity and Forecast

No radio blackouts were observed over the past 24 hours.

Radio Blackout Forecast for Jun 10-Jun 12 2026

Jun 10 Jun 11 Jun 12
R1-R2 55% 55% 55%
R3 or greater 15% 15% 15%

Rationale: Solar activity is likely to be moderate (R1-R2,
Minor-Moderate) with a slight chance for an X-class flares (R3-Strong)
through 12 Jun, mainly due to the flare potential of Regions 4464
(S12E11, Ehi/beta) and 4465.


--- MBSE BBS v1.1.7.2 (Linux-x86_64)
* Origin: Outpost BBS * Johnson City, TN (618:618/1)

:Product: 3-Day Forecast
:Issued: 2026 Jun 13 0030 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
A. NOAA Geomagnetic Activity Observation and Forecast

The greatest observed 3 hr Kp over the past 24 hours was 4 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for Jun 13-Jun 15 2026 is 5.67 (NOAA Scale
G2).

NOAA Kp index breakdown Jun 13-Jun 15 2026

Jun 13 Jun 14 Jun 15
00-03UT 3.33 4.67 (G1) 3.00
03-06UT 4.67 (G1) 4.00 2.33
06-09UT 5.67 (G2) 3.33 3.67
09-12UT 3.00 3.33 2.67
12-15UT 4.67 (G1) 2.67 2.67
15-18UT 5.00 (G1) 2.67 2.00
18-21UT 4.33 3.67 2.33
21-00UT 4.33 4.00 2.33

Rationale: Geomagnetic field conditions are likely to reach G2
(Moderate) geomagnetic storm levels on 13 Jun due to the persistence of
the high-speed stream combined with the anticipated arrival of CMEs that
left the Sun over 09 Jun and 11 Jun. Conditions are expected to decrease
on 14 Jun, with isolated G1 (Minor) storming periods still likely, as
CME influences wane.

B. NOAA Solar Radiation Activity Observation and Forecast

Solar radiation, as observed by NOAA GOES-18 over the past 24 hours, was
below S-scale storm level thresholds.

Solar Radiation Storm Forecast for Jun 13-Jun 15 2026

Jun 13 Jun 14 Jun 15
S1 or greater 5% 5% 5%

Rationale: No S1 (Minor) or greater solar radiation storms are expected.
No significant active region activity favorable for radiation storm
production is forecast.

C. NOAA Radio Blackout Activity and Forecast

No radio blackouts were observed over the past 24 hours.

Radio Blackout Forecast for Jun 13-Jun 15 2026

Jun 13 Jun 14 Jun 15
R1-R2 35% 35% 35%
R3 or greater 5% 5% 5%

Rationale: There is a chance for R1-R2 (Minor-Moderate) radio blackouts
on 13-15 Jun, primarily due to the potential of Regions 4464 and 4465.


--- MBSE BBS v1.1.7.2 (Linux-x86_64)
* Origin: Outpost BBS * Johnson City, TN (618:618/1)

:Product: 3-Day Forecast
:Issued: 2026 Jun 16 0030 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
A. NOAA Geomagnetic Activity Observation and Forecast

The greatest observed 3 hr Kp over the past 24 hours was 2 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for Jun 16-Jun 18 2026 is 4.00 (below NOAA
Scale levels).

NOAA Kp index breakdown Jun 16-Jun 18 2026

Jun 16 Jun 17 Jun 18
00-03UT 2.67 3.00 3.33
03-06UT 3.67 2.00 3.00
06-09UT 3.67 2.00 2.33
09-12UT 2.67 1.67 2.00
12-15UT 1.67 1.33 1.67
15-18UT 1.67 2.67 1.33
18-21UT 1.67 4.00 1.33
21-00UT 2.00 3.00 2.67

Rationale: No G1 (Minor) or greater geomagnetic storms are expected
through 18 Jun.

B. NOAA Solar Radiation Activity Observation and Forecast

Solar radiation, as observed by NOAA GOES-18 over the past 24 hours, was
below S-scale storm level thresholds.

Solar Radiation Storm Forecast for Jun 16-Jun 18 2026

Jun 16 Jun 17 Jun 18
S1 or greater 1% 1% 1%

Rationale: No S1 (Minor) or greater solar radiation storms are expected. through 18 Jun.

C. NOAA Radio Blackout Activity and Forecast

No radio blackouts were observed over the past 24 hours.

Radio Blackout Forecast for Jun 16-Jun 18 2026

Jun 16 Jun 17 Jun 18
R1-R2 20% 20% 20%
R3 or greater 1% 1% 1%

Rationale: There is a slight chance for R1-R2 (Minor-Moderate) radio
blackouts through 18 Jun.


--- MBSE BBS v1.1.7.2 (Linux-x86_64)
* Origin: Outpost BBS * Johnson City, TN (618:618/1)

:Product: 3-Day Forecast
:Issued: 2026 Jun 19 0030 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
A. NOAA Geomagnetic Activity Observation and Forecast

The greatest observed 3 hr Kp over the past 24 hours was 3 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for Jun 19-Jun 21 2026 is 4.00 (below NOAA
Scale levels).

NOAA Kp index breakdown Jun 19-Jun 21 2026

Jun 19 Jun 20 Jun 21
00-03UT 3.00 3.00 2.67
03-06UT 4.00 3.67 2.00
06-09UT 3.67 2.67 2.33
09-12UT 3.00 2.33 2.33
12-15UT 3.00 2.00 2.33
15-18UT 2.00 2.00 2.33
18-21UT 1.67 2.33 2.33
21-00UT 3.00 3.00 2.67

Rationale: No G1 (Minor) or greater geomagnetic storms are expected. No significant transient or recurrent solar wind features are forecast.

B. NOAA Solar Radiation Activity Observation and Forecast

Solar radiation, as observed by NOAA GOES-18 over the past 24 hours, was
below S-scale storm level thresholds.

Solar Radiation Storm Forecast for Jun 19-Jun 21 2026

Jun 19 Jun 20 Jun 21
S1 or greater 1% 1% 1%

Rationale: No S1 (Minor) or greater solar radiation storms are expected.
No significant active region activity favorable for radiation storm
production is forecast.

C. NOAA Radio Blackout Activity and Forecast

No radio blackouts were observed over the past 24 hours.

Radio Blackout Forecast for Jun 19-Jun 21 2026

Jun 19 Jun 20 Jun 21
R1-R2 15% 15% 15%
R3 or greater 1% 1% 1%

Rationale: There is a slight chance for R1 (Minor) radio blackouts on
19-21 Jun.


--- MBSE BBS v1.1.7.2 (Linux-x86_64)
* Origin: Outpost BBS * Johnson City, TN (618:618/1)

:Product: 3-Day Forecast
:Issued: 2026 Jun 22 0030 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
A. NOAA Geomagnetic Activity Observation and Forecast

The greatest observed 3 hr Kp over the past 24 hours was 2 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for Jun 22-Jun 24 2026 is 3.67 (below NOAA
Scale levels).

NOAA Kp index breakdown Jun 22-Jun 24 2026

Jun 22 Jun 23 Jun 24
00-03UT 1.67 1.67 1.67
03-06UT 2.00 2.00 2.33
06-09UT 2.00 1.67 1.67
09-12UT 1.67 1.33 1.67
12-15UT 1.00 1.33 2.67
15-18UT 1.00 0.67 2.67
18-21UT 0.67 1.00 3.67
21-00UT 1.67 1.67 3.67

Rationale: No G1 (Minor) or greater geomagnetic storms are expected. No significant transient or recurrent solar wind features are forecast.

B. NOAA Solar Radiation Activity Observation and Forecast

Solar radiation, as observed by NOAA GOES-18 over the past 24 hours, was
below S-scale storm level thresholds.

Solar Radiation Storm Forecast for Jun 22-Jun 24 2026

Jun 22 Jun 23 Jun 24
S1 or greater 5% 5% 5%

Rationale: No S1 (Minor) or greater solar radiation storms are expected.
No significant active region activity favorable for radiation storm
production is forecast.

C. NOAA Radio Blackout Activity and Forecast

Radio blackouts reaching the R2 levels were observed over the past 24
hours. The largest was at Jun 21 2026 1929 UTC.

Radio Blackout Forecast for Jun 22-Jun 24 2026

Jun 22 Jun 23 Jun 24
R1-R2 40% 40% 40%
R3 or greater 5% 5% 5%

Rationale: There is an increasing chance for R1-R2 (Minor-Moderate)
radio blackouts on 22-24 Jun, due primarily to the flare potential of
Region 4473.


--- MBSE BBS v1.1.7.2 (Linux-x86_64)
* Origin: Outpost BBS * Johnson City, TN (618:618/1)

:Product: 3-Day Forecast
:Issued: 2026 Jun 25 0030 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
A. NOAA Geomagnetic Activity Observation and Forecast

The greatest observed 3 hr Kp over the past 24 hours was 4 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for Jun 25-Jun 27 2026 is 4.00 (below NOAA
Scale levels).

NOAA Kp index breakdown Jun 25-Jun 27 2026

Jun 25 Jun 26 Jun 27
00-03UT 3.67 3.33 3.00
03-06UT 4.00 3.67 3.67
06-09UT 2.67 2.00 2.00
09-12UT 2.67 1.67 2.67
12-15UT 1.67 3.00 2.00
15-18UT 1.67 3.67 2.00
18-21UT 2.67 3.33 2.67
21-00UT 3.67 3.00 3.00

Rationale: No G1 (Minor) or greater geomagnetic storms are expected.
Periods of active conditions are likely 25-27 Jun in response to -CH HSS influences.

B. NOAA Solar Radiation Activity Observation and Forecast

Solar radiation, as observed by NOAA GOES-18 over the past 24 hours, was
below S-scale storm level thresholds.

Solar Radiation Storm Forecast for Jun 25-Jun 27 2026

Jun 25 Jun 26 Jun 27
S1 or greater 5% 5% 5%

Rationale: No S1 (Minor) or greater solar radiation storms are expected.
No significant active region activity favorable for radiation storm
production is forecast.

C. NOAA Radio Blackout Activity and Forecast

No radio blackouts were observed over the past 24 hours.

Radio Blackout Forecast for Jun 25-Jun 27 2026

Jun 25 Jun 26 Jun 27
R1-R2 50% 50% 50%
R3 or greater 10% 10% 10%

Rationale: There is a high chance for R1-R2 (Minor-Moderate) radio
blackouts 54-27 Jun due primarily to the flare potential of Region 4478.


--- MBSE BBS v1.1.7.2 (Linux-x86_64)
* Origin: Outpost BBS * Johnson City, TN (618:618/1)

:Product: 3-Day Forecast
:Issued: 2026 Jun 28 0030 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
A. NOAA Geomagnetic Activity Observation and Forecast

The greatest observed 3 hr Kp over the past 24 hours was 3 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for Jun 28-Jun 30 2026 is 4.33 (below NOAA
Scale levels).

NOAA Kp index breakdown Jun 28-Jun 30 2026

Jun 28 Jun 29 Jun 30
00-03UT 3.00 1.67 1.67
03-06UT 3.67 1.33 3.00
06-09UT 3.67 1.33 4.00
09-12UT 3.00 1.33 4.33
12-15UT 2.00 1.33 4.33
15-18UT 1.67 1.33 3.67
18-21UT 2.67 1.67 3.33
21-00UT 2.67 1.67 1.67

Rationale: No G1 (Minor) or greater geomagnetic storms are expected. No significant transient or recurrent solar wind features are forecast.

B. NOAA Solar Radiation Activity Observation and Forecast

Solar radiation, as observed by NOAA GOES-18 over the past 24 hours, was
below S-scale storm level thresholds.

Solar Radiation Storm Forecast for Jun 28-Jun 30 2026

Jun 28 Jun 29 Jun 30
S1 or greater 5% 5% 5%

Rationale: No S1 (Minor) or greater solar radiation storms are expected.
No significant active region activity favorable for radiation storm
production is forecast.

C. NOAA Radio Blackout Activity and Forecast

No radio blackouts were observed over the past 24 hours.

Radio Blackout Forecast for Jun 28-Jun 30 2026

Jun 28 Jun 29 Jun 30
R1-R2 50% 50% 50%
R3 or greater 10% 10% 10%

Rationale: A high chance for R1-2 (Minor-Moderate) radio blackouts due
to M-class flare activity will presist through 30 Jun primarily due to
the flare potential presently observed in Regions 4475 and 4478.


--- MBSE BBS v1.1.7.2 (Linux-x86_64)
* Origin: Outpost BBS * Johnson City, TN (618:618/1)

:Product: 3-Day Forecast
:Issued: 2026 Jul 01 0030 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
A. NOAA Geomagnetic Activity Observation and Forecast

The greatest observed 3 hr Kp over the past 24 hours was 5 (NOAA Scale
G1).
The greatest expected 3 hr Kp for Jul 01-Jul 03 2026 is 5.00 (NOAA Scale
G1).

NOAA Kp index breakdown Jul 01-Jul 03 2026

Jul 01 Jul 02 Jul 03
00-03UT 4.00 3.33 1.67
03-06UT 5.00 (G1) 4.00 1.67
06-09UT 3.67 3.00 1.67
09-12UT 3.00 2.67 1.33
12-15UT 2.33 2.00 1.33
15-18UT 2.00 2.00 1.33
18-21UT 3.00 2.00 1.33
21-00UT 4.33 1.67 1.33

Rationale: G1 (Minor) storm conditions are early 01 Jul in response to
ongoing influences from the arrival of a CME that left the Sun on 26
Jun. Analysis is ongoing to evaluate potential Earth impacts from the 30
June X1.1 CME, with preliminary tracking suggesting an arrival over
03-04 Jul.

B. NOAA Solar Radiation Activity Observation and Forecast

Solar radiation, as observed by NOAA GOES-18 over the past 24 hours, was
below S-scale storm level thresholds.

Solar Radiation Storm Forecast for Jul 01-Jul 03 2026

Jul 01 Jul 02 Jul 03
S1 or greater 20% 20% 20%

Rationale: The probability for S1 (Minor) or greater solar radiation
storms increases beginning 03 Jul as Regions 4478 and 4479 continue to
develop and move westward into a more favorable position to connect with
Earth.

C. NOAA Radio Blackout Activity and Forecast

Radio blackouts reaching the R3 levels were observed over the past 24
hours. The largest was at Jun 30 2026 2050 UTC.

Radio Blackout Forecast for Jul 01-Jul 03 2026

Jul 01 Jul 02 Jul 03
R1-R2 70% 70% 70%
R3 or greater 20% 20% 20%

Rationale: Isolated R1-R2 (Minor-Moderate) radio blackouts are likely
with a slight chance for R3 (Strong) or greater events primarily due to
the potential of Regions 4478 and 4479.


--- MBSE BBS v1.1.7.2 (Linux-x86_64)
* Origin: Outpost BBS * Johnson City, TN (618:618/1)

:Product: 3-Day Forecast
:Issued: 2026 Jul 04 0030 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
A. NOAA Geomagnetic Activity Observation and Forecast

The greatest observed 3 hr Kp over the past 24 hours was 4 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for Jul 04-Jul 06 2026 is 5.67 (NOAA Scale
G2).

NOAA Kp index breakdown Jul 04-Jul 06 2026

Jul 04 Jul 05 Jul 06
00-03UT 5.67 (G2) 2.67 3.00
03-06UT 4.67 (G1) 2.33 4.00
06-09UT 4.33 2.33 3.33
09-12UT 4.33 2.33 3.33
12-15UT 3.67 2.33 3.00
15-18UT 3.67 2.33 3.00
18-21UT 3.33 4.67 (G1) 2.00
21-00UT 2.33 5.00 (G1) 2.00

Rationale: CME arrival from the event on 30 June is likely to bring G1
(Minor) geomagnetic storm conditions, with a chance for G2 (Moderate)
levels early on 04 Jul. Further CME activity from 01-02 Jul, combined
with possible influences from +CH72, are likely to bring active to
additional G1 (Minor) storm conditions on 05 Jul, with isolated periods
of G2 (Moderate) levels possible.

B. NOAA Solar Radiation Activity Observation and Forecast

Solar radiation, as observed by NOAA GOES-18 over the past 24 hours, was
below S-scale storm level thresholds.

Solar Radiation Storm Forecast for Jul 04-Jul 06 2026

Jul 04 Jul 05 Jul 06
S1 or greater 20% 20% 10%

Rationale: There is a slight chance for S1 (Minor) or greater solar
radiation storms through 06 Jul due to the more geoeffective locations
of the complex regions on the solar disk.

C. NOAA Radio Blackout Activity and Forecast

Radio blackouts reaching the R2 levels were observed over the past 24
hours. The largest was at Jul 03 2026 1811 UTC.

Radio Blackout Forecast for Jul 04-Jul 06 2026

Jul 04 Jul 05 Jul 06
R1-R2 70% 70% 55%
R3 or greater 20% 20% 10%

Rationale: R1-R2 (Minor-Moderate) radio blackouts are likely, with a
slight chance for R3 (Strong) or greater events, through 06 Jul.


--- MBSE BBS v1.1.7.2 (Linux-x86_64)
* Origin: Outpost BBS * Johnson City, TN (618:618/1)

:Product: 3-Day Forecast
:Issued: 2026 Jul 07 0030 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
A. NOAA Geomagnetic Activity Observation and Forecast

The greatest observed 3 hr Kp over the past 24 hours was 3 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for Jul 07-Jul 09 2026 is 3.67 (below NOAA
Scale levels).

NOAA Kp index breakdown Jul 07-Jul 09 2026

Jul 07 Jul 08 Jul 09
00-03UT 1.67 1.33 3.00
03-06UT 1.33 1.33 3.67
06-09UT 1.33 1.33 2.67
09-12UT 1.67 1.67 2.67
12-15UT 1.67 1.33 2.67
15-18UT 1.33 1.33 2.00
18-21UT 1.33 1.67 2.00
21-00UT 1.33 1.67 2.67

Rationale: No G1 (Minor) or greater geomagnetic storms are expected. No significant transient or recurrent solar wind features are forecast.

B. NOAA Solar Radiation Activity Observation and Forecast

Solar radiation, as observed by NOAA GOES-18 over the past 24 hours, was
below S-scale storm level thresholds.

Solar Radiation Storm Forecast for Jul 07-Jul 09 2026

Jul 07 Jul 08 Jul 09
S1 or greater 5% 5% 5%

Rationale: No S1 (Minor) or greater solar radiation storms are expected.
No significant active region activity favorable for radiation storm
production is forecast.

C. NOAA Radio Blackout Activity and Forecast

No radio blackouts were observed over the past 24 hours.

Radio Blackout Forecast for Jul 07-Jul 09 2026

Jul 07 Jul 08 Jul 09
R1-R2 55% 20% 20%
R3 or greater 10% 5% 5%

Rationale: R1-R2 (Minor-Moderate) radio blackouts are likely on Jul 07.
There is a slight chance for R1-R2 radio blackout events on July 08-09.


--- MBSE BBS v1.1.7.2 (Linux-x86_64)
* Origin: Outpost BBS * Johnson City, TN (618:618/1)

:Product: 3-Day Forecast
:Issued: 2026 Jul 10 0030 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
A. NOAA Geomagnetic Activity Observation and Forecast

The greatest observed 3 hr Kp over the past 24 hours was 4 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for Jul 10-Jul 12 2026 is 3.67 (below NOAA
Scale levels).

NOAA Kp index breakdown Jul 10-Jul 12 2026

Jul 10 Jul 11 Jul 12
00-03UT 3.67 3.67 2.33
03-06UT 2.67 2.00 2.00
06-09UT 2.67 2.00 2.00
09-12UT 2.67 2.67 2.00
12-15UT 2.67 2.67 2.00
15-18UT 2.67 2.67 2.00
18-21UT 3.67 2.67 2.00
21-00UT 2.67 3.00 2.33

Rationale: No G1 (Minor) or greater geomagnetic storms are expected. No significant transient or recurrent solar wind features are forecast.

B. NOAA Solar Radiation Activity Observation and Forecast

Solar radiation, as observed by NOAA GOES-18 over the past 24 hours, was
below S-scale storm level thresholds.

Solar Radiation Storm Forecast for Jul 10-Jul 12 2026

Jul 10 Jul 11 Jul 12
S1 or greater 1% 1% 1%

Rationale: No S1 (Minor) or greater solar radiation storms are expected.
No significant active region activity favorable for radiation storm
production is forecast.

C. NOAA Radio Blackout Activity and Forecast

Radio blackouts reaching the R1 levels were observed over the past 24
hours. The largest was at Jul 09 2026 0227 UTC.

Radio Blackout Forecast for Jul 10-Jul 12 2026

Jul 10 Jul 11 Jul 12
R1-R2 40% 40% 40%
R3 or greater 10% 10% 10%

Rationale: There is a chance for R1-R2 (Minor-Moderate) and a slight
chance for R3 (Strong) radio blackouts on 10-12 Jul.


--- MBSE BBS v1.1.7.2 (Linux-x86_64)
* Origin: Outpost BBS * Johnson City, TN (618:618/1)

:Product: 3-Day Forecast
:Issued: 2026 Jul 13 0030 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
A. NOAA Geomagnetic Activity Observation and Forecast

The greatest observed 3 hr Kp over the past 24 hours was 5 (NOAA Scale
G1).
The greatest expected 3 hr Kp for Jul 13-Jul 15 2026 is 4.33 (below NOAA
Scale levels).

NOAA Kp index breakdown Jul 13-Jul 15 2026

Jul 13 Jul 14 Jul 15
00-03UT 3.33 4.00 2.67
03-06UT 3.00 4.33 3.33
06-09UT 2.67 3.33 3.00
09-12UT 2.33 3.33 1.67
12-15UT 1.67 3.00 1.67
15-18UT 2.00 2.67 1.33
18-21UT 3.33 2.33 1.67
21-00UT 4.33 2.33 2.33

Rationale: No G1 (Minor) or greater geomagnetic storms are expected.

B. NOAA Solar Radiation Activity Observation and Forecast

Solar radiation, as observed by NOAA GOES-18 over the past 24 hours, was
below S-scale storm level thresholds.

Solar Radiation Storm Forecast for Jul 13-Jul 15 2026

Jul 13 Jul 14 Jul 15
S1 or greater 1% 1% 1%

Rationale: No S1 (Minor) or greater solar radiation storms are expected.
No significant active region activity favorable for radiation storm
production is forecast.

C. NOAA Radio Blackout Activity and Forecast

Radio blackouts reaching the R1 levels were observed over the past 24
hours. The largest was at Jul 12 2026 0811 UTC.

Radio Blackout Forecast for Jul 13-Jul 15 2026

Jul 13 Jul 14 Jul 15
R1-R2 25% 20% 15%
R3 or greater 5% 1% 1%

Rationale: There exists a chance for R1-R2 (Minor-Moderate) radio
blackouts over 13-15 Jul.


--- MBSE BBS v1.1.7.2 (Linux-x86_64)
* Origin: Outpost BBS * Johnson City, TN (618:618/1)