Storm Prediction Center Mesoscale Discussion 20

   Mesoscale Discussion 0020
   NWS Storm Prediction Center Norman OK
   0144 AM CST Mon Jan 06 2025

   Areas affected...southern Virginia and far northern North Carolina
   Mountains

   Concerning...Winter mixed precipitation 

   Valid 060744Z - 061245Z

   SUMMARY...Moderate freezing rain is expected to expand across
   southern Virginia and the northern North Carolina mountains early
   this morning.

   DISCUSSION...Temperatures are in the upper 20s to near 30 across
   much of southern Virginia this morning. Some snow is occurring
   across central Virginia where the thermodynamic column remains below
   freezing, but the 0C 700mb isotherm, currently located near or just
   south of Roanoke at 07Z will expand north amid strong warm air
   advection and a strengthening low-level jet. This will result in
   sleet or freezing rain across much of southern Virginia within the
   next few hours. In addition, strong isentropic lift and additional
   upper-level ascent will support moderate precipitation across this
   region for the next 6 hours with significant ice accretion likely
   for much of the period. 

   Moderating temperatures may limit ice accumulation across far
   southern Virginia with the greatest accumulation from near Roanoke
   to Lynchburg to Lexington where upper 20s temperatures are most
   likely to persist.

   ..Bentley.. 01/06/2025

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

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

   LAT...LON   38367972 38237800 38127668 37917617 37257615 36947676
               36727839 36377971 36178072 36078128 36108164 36518166
               37078166 37708078 38367972