• DAY3SVR: Nws Storm Predic

    From Weather Alert to All on Tue Apr 27 15:11:00 2021
    ACUS03 KWNS 270721
    SWODY3
    SPC AC 270721

    Day 3 Convective Outlook
    NWS Storm Prediction Center Norman OK
    0221 AM CDT Tue Apr 27 2021

    Valid 291200Z - 301200Z

    ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS
    OF THE OH VALLEY...

    ...SUMMARY...
    Isolated strong to severe thunderstorms are possible across the
    middle and upper Ohio Valley on Thursday.

    ...Synopsis...
    A northern-stream shortwave trough is forecast to extend from
    northwest Ontario into central KS early Thursday morning. A
    southern-stream upper low will likely be centered over the southern
    High Plains at the same time. The northern-stream system is expected
    to remain progressive throughout the day, moving through the Upper
    MS Valley, Upper Great Lakes, and much of the OH Valley. In
    contrast, the southern-stream system is only expected to make
    minimal eastward progression, likely ending the period centered over
    the Big Bend region of TX.

    A surface low associated with the northern-stream shortwave is
    expected to be centered over the Mid MS Valley early Thursday,
    before then quickly progressing northeastward throughout the day. As
    it moves northeastward, an attendant cold front will sweep
    southeastward through the Mid MS and OH Valleys. Low to mid 60s
    dewpoints will likely precede this front across the OH Valley,
    contributing to modest instability despite poor mid-level lapse
    rates and abundant cloud cover. Moderate to strong mid-level flow
    will also be in place over the OH Valley, with the resulting
    environmental conditions that could support a few strong to severe
    storms. Damaging wind gusts and/or a brief tornado are the primary
    threats.

    ..Mosier.. 04/27/2021

    $$