• MESO: Mesoscale Discussion 1421

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Tuesday, September 04, 2018 01:15:25
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    ACUS11 KWNS 040115
    SWOMCD
    SPC MCD 040114
    NDZ000-040315-

    Mesoscale Discussion 1421
    NWS Storm Prediction Center Norman OK
    0814 PM CDT Mon Sep 03 2018

    Areas affected...Western and central ND

    Concerning...Severe Thunderstorm Watch 366...

    Valid 040114Z - 040315Z

    The severe weather threat for Severe Thunderstorm Watch 366
    continues.

    SUMMARY...Severe weather threat for large hail and strong/damaging
    wind gusts persists, as storms continue to develop across western
    North Dakota during the next couple of hours.

    DISCUSSION...At 01Z, mosaic radar imagery showed a broken band of
    storms extending from extreme southwest ND to extreme southeast
    Saskatchewan and adjacent Manitoba. The stronger storms and
    potentially severe caliber so far have been developing across the
    southern half of WW 366, potentially given closer proximity to the
    greater instability (MLCAPE up to 2500-3000 J/kg). However, recent
    trends indicated continued destabilization with northward extent
    (moisture advection) and a stronger storm was forming in northeast
    McKenzie County per radar imagery. Given effective bulk shear
    vectors of 35-50 kt oriented near orthogonal to the surface trough
    in western ND, semi-discrete supercells will remain a primary storm
    mode in the short term (next 2 hours or so).

    ..Peters.. 09/04/2018

    ...Please see www.spc.noaa.gov for graphic product...

    ATTN...WFO...FGF...BIS...

    LAT...LON 45950394 47710333 48980252 49009944 47799979 46610010
    45940057 45950394



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