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Mesoscale Discussion 18
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   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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Page last modified: January 13, 2019
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