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  • MESO: Mesoscale Discussion 2016

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Sat Dec 11 09:15:39 2021
    This is a multi-part message in MIME format...

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    ACUS11 KWNS 110915
    SWOMCD
    SPC MCD 110915=20
    ALZ000-TNZ000-MSZ000-111045-

    Mesoscale Discussion 2016
    NWS Storm Prediction Center Norman OK
    0315 AM CST Sat Dec 11 2021

    Areas affected...northern and central MS into northwest AL

    Concerning...Tornado Watch 558...

    Valid 110915Z - 111045Z

    The severe weather threat for Tornado Watch 558 continues.

    SUMMARY...The threat for a few tornadoes and damaging wind gusts is
    increasing across portions of northern/central MS into northwest AL
    early this morning.

    DISCUSSION...Convection continues to increase in organization and
    intensity across portions of northern MS early this morning ahead of
    the main band of convection stretching from Middle TN to northern
    LA. This convection remains more discrete in a warm sector
    characterized by MLCAPE around 1000-1500 J/kg, effective shear 50+
    kt and STP values around 2-4. Recent data from the KGWX VWP also
    depicts an enlarged, favorably curved low-level hodograph, with very
    strong SRH present. As such, the threat for a few tornadoes and
    damaging wind gusts is increasing across the MCD area. While
    portions of northern MS is within WW 558, this watch expires at 11z
    and a new watch will likely need to be issued, and include portions
    of central MS into northwest AL.

    ..Leitman.. 12/11/2021

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!vmnNsOai1hWzT7c3Putl-irHrT_UlbQFX_dBIkTMs2hjt37K-_GCZzO3sRje0ckHcx4txHkJ$=
    for graphic product...

    ATTN...WFO...OHX...BMX...HUN...MEG...JAN...

    LAT...LON 34079032 34718946 34978895 35058840 35038793 34948761
    34828746 34618748 34188770 33588833 33348886 33048981
    32979032 33019078 33229096 33449091 34079032=20



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