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  • MESO: Mesoscale Discussion 1409

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Sunday, September 02, 2018 03:28:21
    This is a multi-part message in MIME format...

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    ACUS11 KWNS 020328
    SWOMCD
    SPC MCD 020327
    ILZ000-IAZ000-MOZ000-KSZ000-NEZ000-020430-

    Mesoscale Discussion 1409
    NWS Storm Prediction Center Norman OK
    1027 PM CDT Sat Sep 01 2018

    Areas affected...Portions of Iowa...far northern Missouri...and far northwestern Illinois

    Concerning...Severe Thunderstorm Watch 364...

    Valid 020327Z - 020430Z

    The severe weather threat for Severe Thunderstorm Watch 364
    continues.

    SUMMARY...The severe threat continues across WW 364.

    DISCUSSION...Widespread strong to marginally severe convection
    continues across the WW at this time, although the combination of
    widespread convective overturning and low-level
    cooling/stabilization has tempered the severe threat somewhat.
    Nevertheless, newer updrafts in areas that have not been
    convectively overturned will have access to steep mid-level lapse
    rates and moderate to strong instability, supporting an isolated
    hail and damaging wind threat for the next couple of hours or so.
    Additionally, forward-propagating linear segments entering
    southwestern Iowa and vicinity will pose a threat for wind gusts
    approaching severe thresholds. Areas west of these linear segments
    will have a decreased severe threat, and cancellations for portions
    of WW 364 may be needed behind this line.

    ..Cook.. 09/02/2018

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

    ATTN...WFO...LOT...ILX...DVN...DMX...EAX...OAX...TOP...

    LAT...LON 41619539 42079493 42339269 42299109 42239015 42048972
    41718956 41238988 40939067 40569217 40289384 39989499
    40019585 40559598 41039591 41619539



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