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Mesoscale Discussion 30
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   Mesoscale Discussion 0030
   NWS Storm Prediction Center Norman OK
   0621 AM CST Wed Jan 17 2018

   Areas affected...northern South Carolina through central North
   Carolina and south central Virginia

   Concerning...Heavy snow 

   Valid 171221Z - 171715Z

   SUMMARY...Snowfall rates locally up to 1 inch per hour are possible
   through the morning from a portion of northern SC, central NC and
   south-central VA.

   DISCUSSION...The freezing line from east-central NC through western
   SC continues slowly east due to progression of deeper baroclinic
   zone and also evaporative cooling within the near-surface melting
   layer. Bands of mostly light snow persist from western SC through
   western and Central NC into southern VA. However, water vapor and IR
   imagery indicates upper trough taking on a more neutral tilt across
   the TN Valley with general cloud-top cooling noted within the last
   couple of hours. Model data have been consistent with strengthening
   a mid-upper jet within base of this trough. The resulting forcing in
   the exit region of this feature may enhance snowfall rates within
   evolving bands through the morning, especially from central NC into
   south central VA where rates could approach 1 inch per hour at
   times.

   ..Dial.. 01/17/2018

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

   ATTN...WFO...AKQ...RAH...RNK...CAE...GSP...

   LAT...LON   35058154 36907968 36547770 34927981 35058154 

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Page last modified: January 17, 2018
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