• MESO: Mesoscale Discussion 1028

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Sun Jun 20 08:38:03 2021
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    ACUS11 KWNS 200837
    SPC MCD 200837=20

    Mesoscale Discussion 1028
    NWS Storm Prediction Center Norman OK
    0337 AM CDT Sun Jun 20 2021

    Areas affected...Southern Iowa...Northern Missouri

    Concerning...Severe Thunderstorm Watch 292...

    Valid 200837Z - 201030Z

    The severe weather threat for Severe Thunderstorm Watch 292

    SUMMARY...The severe threat across WW 292 is expected to become very
    isolated over the next hour. A new downstream weather watch will not
    be needed due to the marginal nature of the threat.

    DISCUSSION...The latest radar imagery shows a
    north-northwest/south-southeast oriented band of strong
    thunderstorms located in southwest Iowa and northwest Missouri. This
    band is moving eastward along a quasi-stationary front that extends
    from southern Iowa into northern Illinois. To the south of the
    front, the RAP is showing an east-to-west corridor of moderate
    instability. This combined with about 35 kt of 0-6 km shear, evident
    on regional WSR-88D VWPs should sustain an isolated severe threat
    over the next hour. However, the threat should become increasingly
    marginal as the storms move to the east of the strongest
    instability. For this reason, a new weather watch will not be needed
    downstream of WW 292, and the current watch will be allowed to
    expire at 5 am CDT.

    ..Broyles/Edwards.. 06/20/2021

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!uQqVA1_6iP-HR0tzDLJSgbkiKmc2uZ8ChpCDp_PVbJga8Mz1npgyrdw9VThwRL8PQ9eWE0Mk$=
    for graphic product...


    LAT...LON 39819329 39739420 39799458 40109485 40629500 41309530
    41729546 41859477 41789396 41519319 40209255 39819329=20

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