• MESO: Mesoscale Discussion 1689

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Fri Sep 3 02:25:08 2021
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    ACUS11 KWNS 030225
    SWOMCD
    SPC MCD 030224=20
    KSZ000-030400-

    Mesoscale Discussion 1689
    NWS Storm Prediction Center Norman OK
    0924 PM CDT Thu Sep 02 2021

    Areas affected...Portions of eastern Kansas

    Concerning...Tornado Watch 487...

    Valid 030224Z - 030400Z

    The severe weather threat for Tornado Watch 487 continues.

    SUMMARY...A damaging gust or two remains possible over the next
    couple of hours, particularly with a supercell across Lyon County,
    KS.

    DISCUSSION...Multiple semi-discrete storms/clusters are persisting
    across portions of eastern Kansas amid adequate deep-layer ascent
    and buoyancy (1000+ J/kg MLCAPE). While deep-layer (50+ kts) and
    low-level shear (300 m2/s2 effective SRH) are present across the
    warm sector, convective inhibition is increasing with the onset of
    nocturnal cooling (i.e. temperatures dropping below 80F in several
    locales). That being said, storms should remain organized (evident
    via a sustained supercell structure across Lyon County, KS) for at
    least a few more hours. However, increasing static stability within
    the boundary-layer will diminish efficient downward momentum
    transport, limiting damaging gust potential to the most robust storm
    updrafts, with the greatest potential for severe associated with the
    Lyon County supercell. Otherwise, an overall decrease in severe
    potential is expected overnight as the boundary layer further
    stabilizes.

    ..Squitieri/Guyer.. 09/03/2021

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!uWbd8UZfOoK6fm4mIi7O06HGTWJp65KV9eJARuAj-FbF8gWXnQK158L55xw3BIaYTT-DdkUn$=
    for graphic product...

    ATTN...WFO...TOP...ICT...

    LAT...LON 38219754 39079720 39349664 39239604 38879560 38409562
    38169595 38049671 38089706 38219754=20



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