362  
FXUS01 KWBC 312011  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
411 PM EDT TUE OCT 31 2017  
 
VALID 00Z WED NOV 01 2017 - 00Z FRI NOV 03 2017  
 
...HEAVY RAINFALL POSSIBLE FOR PORTIONS OF THE SOUTHERN PLAINS AND  
CENTRAL GULF COAST TONIGHT AND INTO WEDNESDAY...  
 
...ACCUMULATING SNOWFALL POSSIBLE FROM THE NORTHERN PLAINS TO THE  
UPPER MISSISSIPPI VALLEY...  
 
...HEAVY MOUNTAIN SNOWFALL LIKELY ACROSS PARTS OF THE PACIFIC  
NORTHWEST AND NORTHERN ROCKIES...  
 
LINGERING MOISTURE ALONG A WEAKENING FRONTAL BOUNDARY WILL KEEP  
SHOWERS AND THUNDERSTORMS IN THE FORECAST FROM THE SOUTHERN PLAINS  
NORTHWARD THROUGH THE OHIO VALLEY AND INTO THE LOWER GREAT LAKES  
THE NEXT COUPLE OF DAYS. HEAVY RAINFALL WILL BE LIKELY ACROSS  
PORTIONS OF THE SOUTHERN PLAINS AND CENTRAL GULF COAST THIS  
EVENING AND INTO TOMORROW, WITH ISOLATED FLASH FLOODING AND SEVERE  
THUNDERSTORMS POSSIBLE. ON THE NORTH SIDE OF THE FRONT, ANOTHER  
DAY OF COOL TEMPERATURES FROM THE OHIO VALLEY TO THE NORTHEAST IS  
IN THE FORECAST ON WEDNESDAY, WITH SOME PRECIPITATION MIXING WITH  
OR CHANGING TO SNOW DURING THE OVERNIGHT HOURS POSSIBLE. BY  
THURSDAY, EXPECT A SHARP WARM UP WITH TEMPERATURES CLOSE TO 10  
DEGREES ABOVE NORMAL AHEAD OF A SECOND SYSTEM APPROACHING FROM THE  
WEST.  
 
MULTIPLE WAVES OF ENERGY MOVING THROUGH ALOFT OVER THE NORTHERN  
TIER STATES WILL HELP PUSH A COLD FRONT THROUGH THE NORTHERN  
ROCKIES, NORTHERN AND CENTRAL PLAINS, AND THE UPPER MIDWEST 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 ACROSS THESE AREAS WITH WINTER STORM WARNINGS ALSO IN  
EFFECT FOR PORTIONS OF NORTHERN MINNESOTA. FARTHER TO THE WEST,  
HEAVY MOUNTAIN SNOWS ARE POSSIBLE WITH UPWARDS OF A FOOT POSSIBLE  
IN THE HIGHEST TERRAIN OF THE NORTHERN ROCKIES. 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 WEDNESDAY AFTERNOON. EXPECT HEAVY  
SNOWFALL IN THE MOUNTAIN, PARTICULARLY THE WASHINGTON CASCADES,  
WITH AMOUNTS NEAR OR EXCEEDING A FOOT OVER THE NEXT SEVERAL DAYS.  
 
SANTORELLI  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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