784  
ACUS11 KWNS 042155  
SWOMCD  
SPC MCD 042154  
MNZ000-SDZ000-NDZ000-050200-  
 
MESOSCALE DISCUSSION 1779  
NWS STORM PREDICTION CENTER NORMAN OK  
0354 PM CST MON DEC 04 2017  
 
AREAS AFFECTED...PORTIONS OF EASTERN ND...NORTHWEST/WEST-CENTRAL MN  
AND NORTHEAST SD  
 
CONCERNING...BLIZZARD  
 
VALID 042154Z - 050200Z  
 
SUMMARY...HEAVY SNOW, WITH RATES OF ONE INCH/HOUR WILL PROGRESS FROM  
WEST TO EAST ACROSS THE DISCUSSION AREA THROUGH THIS EVENING.  
STRONG SURFACE WIND GUSTS OF 40-50 MPH WILL COMBINE WITH WITH THE  
SNOW TO RESULT IN AREAS EXPERIENCING BLIZZARD CONDITIONS.  
 
DISCUSSION...AT 21Z AN INTENSIFYING SURFACE LOW WAS LOCATED ALONG  
THE MN-WI BORDER NORTHEAST OF MSP, WHILE AN UPPER-LEVEL SHORTWAVE  
TROUGH WAS LOCATED OVER CENTRAL NE/SD. REGIONAL RADAR IMAGERY  
DEPICTS AN AREA OF MODERATE-HEAVY SNOW ASSOCIATED WITH A DEFORMATION  
ZONE EXTENDING FROM NORTHWEST MN/EASTERN ND SOUTH INTO EASTERN SD.  
STRONG LARGE-SCALE ASCENT ASSOCIATED WITH THIS DEFORMATION ZONE WILL  
MOVE EAST THROUGH THIS EVENING ACROSS THE DISCUSSION AREA, AND  
SHORT-TERM FORECAST SOUNDINGS CONTINUE TO SHOW A FAVORABLE  
ENVIRONMENT FOR HEAVY SNOW WITH RATES OF AROUND ONE INCH/HOUR.  
STRONG SURFACE WINDS WITH GUSTS OF 40-50 MPH WILL ALSO CONTINUE AND  
DEVELOP EAST WITH TIME AS THE DEEPENING SURFACE LOW LIFTS NORTHEAST  
TONIGHT. AS A RESULT, AREAS OF VISIBILITIES AT OR BELOW 1/4-MILE  
CAN BE EXPECTED, RESULTING IN BLIZZARD CONDITIONS.  
 
..BUNTING.. 12/04/2017  
   
..PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT
 
 
ATTN...WFO...FGF...ABR...BIS...  
 
LAT...LON 48999731 49009625 48969544 48439541 47829558 47079580  
45899621 45459639 45139652 44769652 44599684 44599753  
44689811 44789841 45119858 47069829 48449750 48999731  
 
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