• MESO: Mesoscale Discussion 1277

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Wed Jul 14 01:35:55 2021
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    ACUS11 KWNS 140135
    SPC MCD 140135=20

    Mesoscale Discussion 1277
    NWS Storm Prediction Center Norman OK
    0835 PM CDT Tue Jul 13 2021

    Areas affected...Eastern WY...Southwest SD...Western NE Panhandle

    Concerning...Severe Thunderstorm Watch 376...

    Valid 140135Z - 140300Z

    The severe weather threat for Severe Thunderstorm Watch 376

    SUMMARY...Damaging wind gusts remain possible within Severe
    Thunderstorm Watch 376 over northeast/east-central WY, southwest SD,
    and the western NE Panhandle.

    DISCUSSION...Two distinct storm clusters have developed within
    Severe Thunderstorm Watch 376. The northernmost cluster is moving
    southeastward through northern Campbell and Crook Counties in
    northeast WY. Storms within this cluster have produced measured wind
    gusts of 62 and 72 mph. Downstream air mass into southwest SD is not
    overly buoyant but continued low-level southeasterly flow should
    provide some low-level moisture advection as well as increase
    convergence on the leading edge of the cold pool. These factors
    should allow the cluster to persist as it moves southeastward, with
    an attendant threat for damaging wind gusts.=20

    The southernmost cluster is moving into Converse County in
    east-central WY. Storms within this cluster have weakened over the
    past hour or so. However, buoyancy increases modestly downstream
    into more of southeast WY and adjacent western NE Panhandle. Like
    the areas farther north, some increase in low-level moisture is
    possible here as well, contributing to enough buoyancy for
    additional updrafts within this cluster. Damaging wind gusts remain
    possible with this cluster.

    ..Mosier.. 07/14/2021

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!p6Qb_QFakOp7vQOS6DD-3hcQwlpkOOE3VE37MRaGN4MMUortseXcfhCQsjeXzR2-h_A6BBZz$=
    for graphic product...


    LAT...LON 44690565 45030509 45000367 44150274 42050410 42780628
    43710612 44690565=20

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