• MESO: Mesoscale Discussion 0381

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Thursday, May 10, 2018 23:37:40
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    ACUS11 KWNS 102337
    SWOMCD
    SPC MCD 102336
    KYZ000-INZ000-ILZ000-110100-

    Mesoscale Discussion 0381
    NWS Storm Prediction Center Norman OK
    0636 PM CDT Thu May 10 2018

    Areas affected...Southern IL/Southern IN/Western KY

    Concerning...Severe potential...Watch unlikely

    Valid 102336Z - 110100Z

    Probability of Watch Issuance...5 percent

    SUMMARY...Strong storms will linger across parts of the lower OH
    River Valley this evening.

    DISCUSSION...Weak low-level warm advection ahead of a low-amplitude
    short-wave trough appears mostly responsible for recent convective
    development along a corridor from portions of southern IL into
    western KY. This activity should spread southeast over the next few
    hours and should weaken later this evening as primary zone of
    isentropic ascent shifts north of this region. Until then, isolated
    large hail and gusty winds may accompany this strongest convection.

    ..Darrow/Guyer.. 05/10/2018

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

    ATTN...WFO...LMK...IND...PAH...ILX...LSX...

    LAT...LON 38978899 38548717 37958579 37198651 38338903 38978899



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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Thursday, April 18, 2019 04:52:42
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    ACUS11 KWNS 180452
    SWOMCD
    SPC MCD 180452
    TXZ000-180615-

    Mesoscale Discussion 0381
    NWS Storm Prediction Center Norman OK
    1152 PM CDT Wed Apr 17 2019

    Areas affected...Portions of central and southern TX

    Concerning...Severe potential...Watch possible

    Valid 180452Z - 180615Z

    Probability of Watch Issuance...40 percent

    SUMMARY...Sporadic strong to severe wind gusts will continue the
    next several hours across parts of northern into southern TX. WFOs
    DFW and EWX have expended WW 78 and 79 eastward, and a new watch
    across portions of the CRP WFO could be needed later depending on
    convective trends.

    DISCUSSION...Several bowing line segments stretched from north TX south/southwest toward Laredo TX as of 0430z. While convection has
    generally trended downward late this evening, several intense cells
    continue to produce severe wind gusts. This trend will likely
    continue for several hours into the overnight hours to the east of
    severe thunderstorm watches 78 and 79. The downstream airmass
    remains very moist and moderately unstable with strong vertical
    shear. However, forcing for ascent will decrease with eastward
    extent and this may ultimately limit severe potential beyond about
    09z. Nevertheless, potential exists at least in the near term for
    sporadic strong/damaging wind gusts.

    The southern part of the bowing segments over Uvalde to Maverick
    Counties in southern TX will track more east/southeast toward
    portions of the Corpus Christi WFO. Depending on radar trends, a new
    watch may be needed for portions of that area, since none of the CRP
    county warning area is included in WW 79.

    ..Leitman/Hart.. 04/18/2019

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

    ATTN...WFO...HGX...FWD...CRP...EWX...

    LAT...LON 28590008 29099957 30039840 31309761 32239724 32519705
    32639686 32479640 32129611 31839600 30709600 29369665
    28499735 27959814 27879930 27949996 28220021 28590008



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