Mesoscale Discussion 0006
   NWS Storm Prediction Center Norman OK
   1047 AM CST Sat Jan 06 2024

   Areas affected...Central/Southern PA...Eastern WV
   Panhandle...Western/Central MD...Far Northern VA

   Concerning...Heavy snow 

   Valid 061647Z - 062145Z

   SUMMARY...Snowfall rates are expected to increase across the region
   over the next several hours. Rates around 1"/hr are likely across
   much of the area, with localized 2"/hr rate possible, particularly
   across south-central PA.

   DISCUSSION...Recent satellite imagery shows a low-amplitude
   shortwave trough over eastern TN, moving quickly northeastward.
   Regional radar imagery shows a large area of precipitation across
   the Mid-Atlantic and into southern portions of the Northeast, within
   the warm conveyor preceding this shortwave. Attendant low-level flow
   is forecast to strengthen over the next several hours as the
   shortwave continues northeastward. Additionally, the attendant
   surface low, which is currently over south-central NC, is expected
   to deepen over the next few hours as it moves northeastward across
   central NC and southeast VA. 

   These factors will result in an area of strong low-level
   frontogenesis over VA, with associated lift focused into
   central/southern PA, the eastern WV Panhandle, western/central MD,
   and far northern VA. Most of this area is currently experiencing
   moderate snow, but snowfall rates are expected to increase over the
   next few hours as the evolution described above occurs. Rates around
   1"/hr are likely across much of the area, with some areas
   experiencing 2"/hr, particularly south-central PA where banding
   appears most likely. Highest rates are expected to be centered
   around 20Z, with rates then likely diminishing over this area as the
   shortwave continues northeastward.

   ..Mosier.. 01/06/2024

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

   ATTN...WFO...PHI...CTP...LWX...PBZ...RLX...

   LAT...LON   39638023 40407968 41007844 41017668 40397599 39607652
               38947765 38657885 38988003 39638023