172  
FXUS01 KWBC 302000  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
259 PM EST SUN DEC 30 2018  
 
VALID 00Z MON DEC 31 2018 - 00Z WED JAN 2 2019  
 
...TURNING MUCH COLDER FOR THE PLAINS AND WESTERN U.S. WITH HEAVY  
RAIN FROM THE GULF COAST TO THE GREAT LAKES...  
 
A STRONG COLD FRONT CURRENTLY CROSSING THE NORTHERN PLAINS WILL  
CONTINUE TO DROP SOUTHEASTWARD THROUGH MONDAY. THIS ARCTIC  
BOUNDARY WILL CAUSE TEMPERATURES TO PLUMMET AND WIND CHILLS TO  
REACH HAZARDOUS LEVELS FROM MONTANA TO MINNESOTA. OVERNIGHT LOWS  
IN THE -10 TO -20 DEGREE RANGE ARE LIKELY FOR THESE AREAS, AND  
ALSO FOR THE CENTRAL AND NORTHERN ROCKIES.  
 
ANOTHER FRONTAL BOUNDARY PASSING THROUGH THE INTERMOUNTAIN WEST  
AND SOUTHERN ROCKIES THROUGH MONDAY WILL ALSO BE MAKING WEATHER  
HEADLINES. THIS SYSTEM WILL CONTINUE SINKING SOUTHWARD THROUGH  
MONDAY NIGHT AND BRING YET ANOTHER ROUND OF SIGNIFICANT SNOWFALL  
FOR PARTS OF ARIZONA, COLORADO, AND NEW MEXICO, WITH SOME  
LOCATIONS GETTING OVER 8 INCHES OF ACCUMULATION BEFORE THE EVENT  
WINDS DOWN. TO THE NORTH, A BAND OF MODERATE SNOW IS FORECAST TO  
SPREAD EASTWARD ACROSS THE DAKOTAS INTO MINNESOTA ALONG THE ARCTIC  
BOUNDARY.  
 
FARTHER EAST, MILD AND UNSETTLED WEATHER IS EXPECTED TO BEGIN THE  
WORK WEEK AS A STORM SYSTEM PROGRESSES OUT OF THE WESTERN GULF OF  
MEXICO TONIGHT AND THEN REACHES THE OHIO VALLEY BY MONDAY EVENING.  
THE WIDESPREAD RAINFALL THAT WILL BE ASSOCIATED WITH THIS MAY BE  
ENHANCED BY STRONG THUNDERSTORMS ON MONDAY. THE RAIN WILL PUSH  
INTO THE OHIO VALLEY AND THEN THE NORTHEAST AS THE SURFACE LOW  
DEEPENS ON ITS TRACK TOWARDS THE GREAT LAKES. THIS WILL EQUATE TO  
RAINY CONDITIONS FOR MANY AREAS ON NEW YEAR'S EVE. FARTHER SOUTH,  
MUCH OF FLORIDA WILL REMAIN SOUTH OF THE UNSETTLED WEATHER WITH  
WELL ABOVE NORMAL TEMPERATURES LIKELY.  
 
HAMRICK  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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