Mesoscale Discussion 1836
   NWS Storm Prediction Center Norman OK
   0601 PM CST Sat Dec 05 2020

   Areas affected...central Maine

   Concerning...Heavy snow 

   Valid 060001Z - 060500Z

   SUMMARY...Heavy snow will continue to develop across portions of
   northern and central Maine through this evening. Snow rates of 1 to
   2 inches per hour are likely.

   DISCUSSION...Evening water vapor imagery showed widespread
   precipitation spreading inland from a well developed cyclone near
   the coast of New England. Recent Radar and surface observations are
   showing the gradual development of heavy banded snow northwest of
   the rain/snow transition line from approximately Augusta toward
   Houlton, ME. As the rapidly deepening surface low continues
   northeastward, strong ascent driven by deep height falls and 850-700
   mb frontogenisis will intensify precipitation through this evening.
   The reservoir of cold air across northern and central Maine is not
   particularly robust due to weak cold advection being offset by
   strong low and mid-level warm advection. However, only gradual
   northwestward movement of the rain snow line is expected through
   this evening due to strong dynamic cooling from heavy precipitation
   rates. This should keep the corridor of heaviest snow to the north
   of the rain snow line near the I-95 corridor. The heaviest snow will
   begin to wane after 6z as the upper trough and surface cyclone
   depart to the northeast.

   ..Lyons/Thompson.. 12/06/2020

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

   ATTN...WFO...CAR...GYX...

   LAT...LON   44836930 45276886 45616837 45936781 46486772 46796772
               47126774 47326800 47416823 47296863 47096907 46606955
               46066986 45426998 44836977 44716957 44836930