• DAY1 2/5 Risk Area UPDATE

    From Mike Powell@618:250/10 to All on Fri Jul 10 12:30:52 2026
    ACUS01 KWNS 101632
    SWODY1
    SPC AC 101630

    Day 1 Convective Outlook
    NWS Storm Prediction Center Norman OK
    1130 AM CDT Fri Jul 10 2026

    Valid 101630Z - 111200Z

    ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF
    THE SOUTHERN/CENTRAL HIGH PLAINS AND THE OZARKS INTO THE MID
    MISSISSIPPI VALLEY...

    ...SUMMARY...
    Strong to severe thunderstorms capable of producing scattered
    severe/damaging winds and occasional hail will be possible this
    afternoon and evening from parts of the southern/central High Plains
    to the Ozarks and mid Mississippi Valley.

    ...Southern/Central High Plains...
    Scattered high-based thunderstorms are forecast later this afternoon
    in a weak low-level upslope regime. Ample heating due to the void
    of cloud cover and a high sun angle will facilitate the development
    of very steep lower tropospheric lapse rates. A cluster or two is
    forecast to eventually evolve this evening over southeast CO and
    from the OK-TX Panhandles into far eastern NM. Severe gusts (60-70
    mph) will be the primary hazard. Isolated hail may also occur with
    the stronger cores given moderate deep-layer shear.

    ...Ozarks to the Mid Mississippi Valley...
    An MCV near the northeast KS/southeast NE border will migrate
    eastward today and serve as a forcing impetus for thunderstorms this
    afternoon. Heating in wake of earlier showers/storms will act to
    destabilize the boundary layer ahead of storms forming in proximity
    to the MCV. Some modest enhancement of mid-level westerly flow may
    promote organized storms, including possibly supercells, in addition
    to organized clusters. Hail and severe gusts will be the primary
    hazards with this activity.

    ...Tennessee Valley/Southeast to the Mid-Atlantic/Ohio Valley...
    An MCV moving into the southern Appalachians will likely aid
    additional convective development this afternoon over the southern
    Appalachians and into the Piedmont by late afternoon. Multicells
    capable of localized damaging gusts (50-60 mph) will be the primary
    threat with the stronger water-loaded downdrafts. A somewhat
    separate area of thunderstorm development is also forecast farther
    north across parts of the Mid-Atlantic/OH Valley where multiple weak
    mid-level perturbations should develop eastward in generally zonal
    flow aloft. While mid-level winds and related deep-layer shear will
    be slightly stronger across this region compared to areas farther
    south, instability should be weaker. Regardless, occasional
    strong/damaging winds may occur with any thunderstorm clusters that
    can develop along/south of a front this afternoon across the
    Mid-Atlantic/OH Valley.

    ...Western Florida Peninsula...
    A couple of stronger storms may develop along the sea breeze this
    afternoon. PW near 2 inches will support water-loaded downdrafts
    capable of localized severe gusts and perhaps wind damage.

    ...Northern Plains/Upper Midwest...
    Isolated to scattered thunderstorms may develop this afternoon
    along/near a weak front from parts of eastern SD and vicinity into
    western MN. Deep-layer shear will be weak and limit storm
    organization but steepened lapse rates may support an isolated risk
    for localized severe gusts or marginally severe hail with the
    stronger cores.

    ...Southeast AZ...
    Forecast soundings later today show 20-kt northeasterly 500-mb flow
    atop weak low-level westerly flow. This slight enhancement to flow
    may aid in storm movement and some cold pool organization with the
    scattered convection that develops. Steep surface to 400-mb lapse
    rates may enable a few severe gusts with the stronger cores.

    ..Smith/Chalmers.. 07/10/2026

    $$
    --- MultiMail/DOS
    * Origin: Capitol City Online (618:250/10)