934  
FXUS01 KWBC 010801  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
401 AM EDT WED NOV 01 2017  
 
VALID 12Z WED NOV 01 2017 - 12Z FRI NOV 03 2017  
 
...HEAVY RAINFALL POSSIBLE FOR PORTIONS OF THE SOUTHERN PLAINS AND  
CENTRAL GULF COAST THROUGH WEDNESDAY MORNING...  
 
...ACCUMULATING SNOWFALL LIKELY FOR THE NORTHERN ROCKIES AND  
POSSIBLE FROM THE PLAINS TO THE UPPER MISSISSIPPI VALLEY...  
 
...HEAVY MOUNTAIN SNOWFALL LIKELY ACROSS PARTS OF THE PACIFIC  
NORTHWEST AND NORTHERN ROCKIES...  
 
RAIN AND THUNDERSTORMS WILL LINGER OVER PORTIONS OF THE SOUTHERN  
PLAINS AND CENTRAL GULF COAST AS A FRONTAL BOUNDARY WEAKENS OVER  
THE AREA. POCKETS OF HIGHER RAINFALL RATES ALONG THIS BOUNDARY  
OVER EASTERN TEXAS AND LOUISIANA MAY INCREASE THE RISK FOR  
EXCESSIVE RAINFALL. THE CENTRAL LOW PRESSURE AND LEADING EDGE OF  
THE FRONT WILL CONTINUE TO LIFT NORTHEAST THROUGH THE GREAT LAKES  
REGION AND INTO SOUTHERN CANADA. WHILE THE PRECIPITATION OVER MUCH  
OF THE MIDWEST/UPPER MISSISSIPPI VALLEY WILL FALL AS RAIN, IT IS  
FORECAST TO SWITCH OVER TO SNOW FOR THE ARROWHEAD OF MINNESOTA  
AND NORTHERN WISCONSIN. THIS REGION COULD SEE ACCUMULATING SNOW  
AND HAVE WINTER WEATHER ADVISORIES IN EFFECT. COOL TEMPERATURES  
FROM THE OHIO VALLEY TO THE NORTHEAST TODAY WILL ALLOW SOME  
PRECIPITATION MIXING WITH OR CHANGING TO SNOW. BY THURSDAY, EXPECT  
A SHARP WARM UP WITH TEMPERATURES CLOSE TO 10 DEGREES ABOVE NORMAL  
AHEAD OF A SECOND SYSTEM APPROACHING FROM THE WEST.  
 
ALONG THE ROCKIES MULTIPLE WAVES OF ENERGY IS FORECAST TO PASS  
THROUGH ALOFT WHICH WILL HELP PUSH A COLD FRONT THROUGH THE  
NORTHERN ROCKIES, NORTHERN AND CENTRAL PLAINS, AND THE UPPER  
MIDWEST OVER THE THE NEXT FEW DAYS. DAYTIME RAIN AND OVERNIGHT  
ACCUMULATING SNOWFALL WILL BE POSSIBLE, ESPECIALLY ACROSS THE  
NORTHERN PLAINS AND THE UPPER MISSISSIPPI VALLEY. GENERALLY, 2 TO  
4 INCHES OF SNOW IS FORECAST IN THE LOWER ELEVATION OF THESE  
AREAS, HIGHER AMOUNTS EXPECTED IN THE HIGHER TERRAIN. BEHIND THE  
FRONT, TEMPERATURES WILL BE CHILLY WITH AFTERNOON HIGHS AROUND 10  
DEGREES BELOW NORMAL.  
 
OUT WEST, A STRONG UPPER LEVEL SYSTEM DROPPING DOWN ALONG THE  
WESTERN CANADIAN COAST WILL RETURN PRECIPITATION TO MUCH OF THE  
PACIFIC NORTHWEST STARTING BY THIS AFTERNOON. EXPECT HEAVY  
SNOWFALL IN THE MOUNTAIN, PARTICULARLY THE WASHINGTON CASCADES,  
WITH AMOUNTS NEAR OR EXCEEDING A FOOT OVER THE NEXT SEVERAL DAYS.  
 
CAMPBELL/SANTORELLI  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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