• MESO: Mesoscale Discussion 1125

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Saturday, July 21, 2018 23:25:22
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    ACUS11 KWNS 212325
    SWOMCD
    SPC MCD 212324
    SCZ000-NCZ000-GAZ000-ALZ000-220100-

    Mesoscale Discussion 1125
    NWS Storm Prediction Center Norman OK
    0624 PM CDT Sat Jul 21 2018

    Areas affected...Southern Appalachians to Northern FL

    Concerning...Severe Thunderstorm Watch 300...

    Valid 212324Z - 220100Z

    The severe weather threat for Severe Thunderstorm Watch 300
    continues.

    SUMMARY...Scattered severe thunderstorms will propagate southeast
    across ww300 this evening. Large hail remains the most likely severe
    threat.

    New ww may be warranted into portions of TLH CWA.

    DISCUSSION...Several thunderstorm clusters have evolved across the
    southern Appalachians into east-central AL region. The strongest
    cluster is located along the AL/GA border where initial supercell
    activity is congealing into a complex that is expected to propagate
    into southwest GA over the next few hours. MRMS data suggests large
    hail is common with this activity. There is some concern this
    convection may spread south of ww300 into the northern portions of
    TLH where a new ww may be warranted.

    Farther north, strong/severe convection is expected to spread off
    the higher terrain across northeastern portions of ww300, primarily
    across GSP CWA over the next 1-2 hours. Large hail is the main
    threat with these storms.

    ..Darrow.. 07/21/2018

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

    ATTN...WFO...CAE...GSP...MRX...FFC...BMX...

    LAT...LON 33928608 35818138 33628139 31738607 33928608



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