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  • MESO: Mesoscale Discussion 0701

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Sunday, June 10, 2018 23:37:01
    This is a multi-part message in MIME format...

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    ACUS11 KWNS 102336
    SWOMCD
    SPC MCD 102336
    SDZ000-NDZ000-WYZ000-110130-

    Mesoscale Discussion 0701
    NWS Storm Prediction Center Norman OK
    0636 PM CDT Sun Jun 10 2018

    Areas affected...parts of western South Dakota

    Concerning...Tornado Watch 171...

    Valid 102336Z - 110130Z

    The severe weather threat for Tornado Watch 171 continues.

    SUMMARY...Severe risk -- including potential for a couple of
    tornadoes -- continues across WW 171.

    DISCUSSION...Recent radar loop shows isolated storms developing near
    a cold front moving across northeast Wyoming and western South
    Dakota. The most vigorous storm remains the right-moving/cyclonic
    member of a recent storm split, that is moving across far southeast
    Harding County. This storm continues to exhibit broad rotation --
    and has recently produced baseball-sized hail.

    With a moist/strongly unstable airmass (mixed-layer CAPE in excess
    of 4000 J/kg) ahead of the cold front and along and south of a warm
    front bisecting western South Dakota from northwest to southeast,
    additional storms will likely develop as ascent associated with the
    advancing upper system overspreads the area. Low-level
    southeasterly flow veering/increasing to southwesterly aloft will
    provide shear supportive of supercells, with a tornado or two
    possible in addition to very large hail and locally damaging gusts.
    With time, CAMs continue to suggest gradual upscale/linear growth,
    which would likely yield an increase in damaging wind risk.

    ..Goss.. 06/10/2018

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

    ATTN...WFO...ABR...BIS...UNR...

    LAT...LON 43830428 44670363 45580373 45980333 45940030 44059990
    43190229 43830428



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