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  • MESO: Mesoscale Discussion 0018

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Sunday, January 13, 2019 04:16:06
    This is a multi-part message in MIME format...

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    ACUS11 KWNS 130316
    SWOMCD
    SPC MCD 130315
    VAZ000-NCZ000-WVZ000-TNZ000-SCZ000-130815-

    Mesoscale Discussion 0018
    NWS Storm Prediction Center Norman OK
    0915 PM CST Sat Jan 12 2019

    Areas affected...far southeast WV...portions of southern VA and
    western NC

    Concerning...Freezing rain

    Valid 130315Z - 130815Z

    SUMMARY...Light to moderate freezing rain, possibly mixed with snow
    and sleet at times, will continue for much of the overnight hours.
    Freezing rain rates near 0.05 inches per 3 hours will result in
    hazardous conditions as ice continues to accumulate into the early
    morning hours.

    DISCUSSION...Light to moderate freezing rain is ongoing across
    portions of the central Appalachians this evening. Precipitation
    rates have increased as 850mb frontogenesis has strengthened over
    the area ahead of a shortwave impulse now ejecting across western
    TN. In the low levels, surface temperatures are ranging from around
    28 to 32 degrees F. The 850mb freezing line is draped across far
    southern VA, indicating snow and possibly a snow/sleet mix is
    possible across much of northern into central VA, transitioning to
    freezing rain further south.

    A warm nose of 0.2-3.0 C has been noted in 00z regional RAOBs as
    well as in latest RAP forecast soundings. As a result, the
    predominant precipitation type should remain freezing rain, though
    some sleet could mix in and/or rain where surface temperatures hover
    near 32-33 degrees. These conditions, with freezing rain rates near
    0.05 inches per 3 hours, should persist for much of the overnight
    hours, leading to hazardous conditions as ice continues to
    accumulate.

    ..Leitman.. 01/13/2019

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

    ATTN...WFO...AKQ...RAH...RNK...RLX...GSP...MRX...

    LAT...LON 36257906 35708031 35248156 35218226 35218256 35358272
    35598262 36848161 37718112 37618065 37298039 37028040
    36838016 36867961 37137905 37377844 37367793 37207774
    36807801 36257906



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