• MESO: Mesoscale Discussion 0035

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Sunday, January 20, 2019 03:07:24
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    ACUS11 KWNS 200207
    SWOMCD
    SPC MCD 200206
    GAZ000-FLZ000-200300-

    Mesoscale Discussion 0035
    NWS Storm Prediction Center Norman OK
    0806 PM CST Sat Jan 19 2019

    Areas affected...Central/Southwest GA...Eastern FL Panhandle

    Concerning...Tornado Watch 3...

    Valid 200206Z - 200300Z

    The severe weather threat for Tornado Watch 3 continues.

    SUMMARY...Severe threat will continue to diminish across central GA.
    Some severe threat may extend past 03Z in southwest GA/eastern FL
    Panhandle and extension in time and/or area of Tornado Watch 3 may
    be needed. The probability of a new watch downstream is low.

    DISCUSSION...Singular convective line that moved across eastern
    AL/western FL Panhandle/western GA has devolved into two distinct
    lines, one moving through central GA and the other moving across the
    eastern FL Panhandle. The air mass downstream of the northern line
    is characterized by temperatures in mid 60s, dewpoints in the mid to
    upper 50s, and marginal instability (i.e. MLCAPE less than 250
    J/kg). Consequently, despite favorable vertical shear, this portion
    of the line is expected to gradually lose strength.

    Air mass downstream of the southern line is characterized by
    dewpoints in the low to mid 60s and MLCAPE closer to 500 J/kg. As a
    result, the longevity of this line will likely extend past the 03Z
    (the expiration time of Tornado Watch 3) and some extension in time
    and/or area may be needed if trends merit. Even so, given the
    veering low-level flow and shallow nature of the ongoing line, the
    severe threat after 03Z appears to be isolated enough to preclude
    the need for a new watch.

    ..Mosier.. 01/20/2019

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

    ATTN...WFO...JAX...FFC...TAE...

    LAT...LON 32398404 33278336 33458276 32938261 31018317 29938399
    29718532 31148455 32398404



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