• MESO: Mesoscale Discussion 0698

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Sat May 22 03:05:09 2021
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    ACUS11 KWNS 220305
    SPC MCD 220304=20

    Mesoscale Discussion 0698
    NWS Storm Prediction Center Norman OK
    1004 PM CDT Fri May 21 2021

    Areas affected...Northwestern Nebraska/Western South Dakota

    Concerning...Severe Thunderstorm Watch 192...

    Valid 220304Z - 220430Z

    The severe weather threat for Severe Thunderstorm Watch 192

    SUMMARY...Large hail remains possible with the strongest convection,
    especially from northwestern Nebraska into southwestern South

    DISCUSSION...Surface front has crept south across the central High
    Plains this evening with the leading edge of this notable density
    current now stretching from Stanley County SD-Sheridan County
    NE-just south of CYS. Over the last hour or so, the strongest
    convection appears to be along the cool side of the boundary. With
    LLJ expected to increase across NE into south-central SD, this trend
    may continue, though near-surface based thunderstorms may also
    develop along the frontal zone. Large hail, possible in excess of 1
    inch at times, may occur with the strongest updrafts.

    ..Darrow.. 05/22/2021

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!uSAom2SmxIRZBHP9Os3020ZaLSBYe1XRfXpXfmslpXRoiA38eoW1z0cUc5hJO4-vAAVrR_Zs$=
    for graphic product...


    LAT...LON 42950400 45190142 44680074 42730233 42950400=20

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