CLOUDS WILL BE ON THE INCREASE WEDNESDAY INTO THURSDAY IN ADVANCE
OF THE NEXT UPPER LEVEL TROUGH...A CLOSED LOW. THE MEDIUM RANGE
MODEL SOLUTIONS HAVE TRENDED TOWARD A COLDER LOW AND FURTHER SOUTH
WITH EACH RUN. THE ECMWF AND GEM HAVE SHOWN SOME RUN-TO-RUN
CONSISTENCY WITH THE LOW FURTHER SOUTH AND MORE CLOSED THAN THE
GFS. WITH A COLD ARCTIC AIRMASS (-10C TO -3C AT 850MB) IN PLACE
AND AN APPROACHING 548DAM 500MB CLOSED LOW ON THURSDAY INTO
FRIDAY...WE`VE ADDED CHANCES FOR SNOW TO THE FORECAST. FORECAST
SOUNDINGS FOR THURSDAY NIGHT AND FRIDAY SHOW THE ENTIRE COLUMN
BELOW 0C...SO THE PRECIPITATION TYPE WILL DEFINITELY BE SNOW. THE
ONLY QUESTION IS MOISTURE AVAILABILITY. THE FRONTAL LAYER WILL BE
EXTREMELY DRY WITH SURFACE DEWPOINT TEMPERATURES IN THE SINGLE
DIGITS. AT THIS TIME...WE`RE FORECASTING LIGHT SNOW AND WILL WAIT
BEFORE TAKING A STAB AT AC ULATIONS. IF A MOISTURE TAP WERE TO
DEVELOP...SNOW WOULD AC ULATE EFFICIENTLY (LITTLE MELTING) AFTER
SEVERAL DAYS OF TEMPERATURES IN THE TEENS TO 30S.