SPC MESOSCALE DISCUSSION 0680 FOR NERN MT...NRN ND AND FAR NWRN MN
   CONCERNING...HEAVY SNOW...
   
   VALID 061101Z - 061800Z
   
   HEAVY SNOW WILL BE LIKELY IN A 50-70 MILE WIDE BAND FROM NERN MT
   EWD ACROSS NRN ND AND INTO NWRN MN THROUGH THE EARLY AFTERNOON.
   ACCUMULATION RATES UP TO 1 IN/HR...WITH TOTAL ACCUMULATIONS UP TO
   6 INCHES ARE POSSIBLE.
   
   LATEST IR IMAGERY INDICATES TWO MID LEVEL VORTICITY/LOW
   CENTERS...ONE LOCATED OVER NERN MT TO THE WEST OF GGW AND THE OTHER
   NEAR DIK IN WRN ND. BOTH OF THESE FEATURES WERE ENHANCING MID LEVEL
   FRONTOGENETIC FORCING TO THE NORTH OF THE SFC-850 MB FRONTAL
   BOUNDARY AND WERE PROVIDING FOR DEEP LAYER UVM. RECENT MINOT AND
   GLASGOW VWP DATA INDICATED THAT THE STRONGEST FRONTOGENETIC FORCING
   WAS OCCURING IN THE 4-6 KM LAYER WHICH CORRESPONDED TO THE -12 TO 
   -18 DEG C...FAVORING DENDRITE SNOW GROWTH. STRONG FRONTOGENETIC
   FORCING AIDING IN HEAVY SNOW OVER THE MINOT/DICKINSON AREA
   CURRENTLY WILL CONTINUE TO SHIFT ENE ACROSS NCENTRAL AND INTO NERN
   ND OVER THE NEXT FEW HOURS. 
   
   THE 09Z RUC INDICATES THAT THE FRONTOGENETIC FORCING CURRENTLY
   STRENGTHENING OVER NERN MT NEAR THE PRIMARY 700 MB LOW WILL MOVE
   EWD INTO NWRN AND NCENTRAL ND THROUGH THE MID MORNING. THIS AREA OF
   HEAVY SNOW WILL THEN MOVE EWD FROM MID MORNING ONWARD ACROSS NERN
   ND AND INTO FAR NWRN MN ALONG AND JUST NORTH OF THE PRIMARY 700 MB
   LOW CENTER TRACK. 
   
   ..CROSBIE.. 05/06/02