• MESO: Mesoscale Discussion 1370

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Wed Jul 28 05:51:01 2021
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    ACUS11 KWNS 280550
    SWOMCD
    SPC MCD 280550=20
    WIZ000-ILZ000-IAZ000-280645-

    Mesoscale Discussion 1370
    NWS Storm Prediction Center Norman OK
    1250 AM CDT Wed Jul 28 2021

    Areas affected...Portions of eastern IA...southwestern WI...and far northwestern IL

    Concerning...Severe Thunderstorm Watch 397...

    Valid 280550Z - 280645Z

    The severe weather threat for Severe Thunderstorm Watch 397
    continues.

    SUMMARY...An isolated hail/wind threat should diminish over the next
    hour or so. Downstream watch issuance is not expected.

    DISCUSSION...Ongoing strong convection across parts of eastern IA
    and southwestern WI may continue to pose an isolated threat for
    marginally severe hail and strong/gusty winds in the short term,
    given the presence of around 1500-2500 J/kg of MLCAPE and 35-40 kt
    of deep-layer shear. However, this activity will soon move
    south-southeastward into an environment characterized by less
    instability and increasing convective inhibition. The low-level
    inflow into these storms is also rather weak and veered to
    northwesterly. Accordingly, a gradual decrease in storm coverage and
    intensity is forecast over the next couple of hours. Severe
    Thunderstorm Watch 397 will likely be allowed to expire at 07Z as
    scheduled, and a downstream watch is not expected.

    ..Gleason.. 07/28/2021

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!vr2q2XYWGhJ2Ql2zQmd2gv3zsjEXg0BTcgyNHyI82LdFr7ZbDyiApE8D-gAP99oNQt7uyvIt$=
    for graphic product...

    ATTN...WFO...MKX...DVN...ARX...DMX...

    LAT...LON 42569216 42839188 43589009 43048963 42328967 41949070
    41899189 42179223 42569216=20



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