995  
FXUS01 KWBC 071953  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
253 PM EST TUE NOV 07 2017  
 
VALID 00Z WED NOV 08 2017 - 00Z FRI NOV 10 2017  
 
...HEAVY RAIN POSSIBLE FOR PARTS OF THE SOUTHERN PLAINS ON  
WEDNESDAY...  
 
...AN UNSETTLED AND WET PATTERN IS IN STORE FOR THE NORTHWEST U.S.  
BY TOMORROW...  
 
...BELOW NORMAL TEMPERATURES EXPECTED TO PERSIST THROUGH THE WEEK  
FOR MOST AREAS EAST OF THE ROCKIES...  
 
A COLD FRONT PUSHING SOUTHWARD THROUGH THE DEEP SOUTH THIS  
AFTERNOON WILL KEEP SHOWERS AND THUNDERSTORMS IN THE FORECAST  
TONIGHT AND INTO TOMORROW FROM THE SOUTHERN PLAINS TO THE  
SOUTHEAST/SOUTHERN MID-ATLANTIC. ADDITIONAL ENERGY IN THE UPPER  
LEVELS MOVING THROUGH WILL ALSO INCREASE THE CHANCES FOR MODERATE  
TO HEAVY RAINFALL ACROSS PORTIONS OF THE SOUTHERN PLAINS ON  
WEDNESDAY. ON THE NORTHERNMOST EDGE OF THE PRECIPITATION SHIELD,  
SNOW OR A RAIN SNOW MIX MAY BE POSSIBLE ACROSS PARTS OF THE  
SOUTHERN AND CENTRAL ROCKIES AND EVEN INTO THE TEXAS AND OKLAHOMA  
PANHANDLES. SURFACE HIGH PRESSURE WILL DOMINATE BEHIND THE FRONT  
WHICH WILL ALLOW FOR COOLER THAN AVERAGE TEMPS FOR MUCH OF THE  
AREA FROM THE SOUTHERN PLAINS TO THE MID-ATLANTIC. AFTERNOON HIGH  
TEMPERATURE READINGS COULD BE AS MUCH AS 10 TO 20 DEGREES BELOW  
NORMAL THE NEXT FEW DAYS.  
 
A FRONTAL SYSTEM MOVING INTO THE PACIFIC NORTHWEST ON WEDNESDAY  
WILL BEGIN A PERIOD OF UNSETTLED AND WET WEATHER ACROSS MUCH OF  
THE PACIFIC NORTHWEST, NORTHERN CALIFORNIA, THE INTERMOUNTAIN  
WEST, AND NORTHERN ROCKIES THE NEXT FEW DAYS. EXPECT RAIN ACROSS  
THE LOWER ELEVATIONS, WITH SNOW IN THE HIGHEST OF THE TERRAIN.  
LIGHT FREEZING RAIN IS ALSO POSSIBLE FOR SOME OF THE LOWER  
ELEVATIONS OF THE CASCADES AS WELL AS THE NORTHERN ROCKIES.  
 
ELSEWHERE, A COLD FRONT DROPPING SOUTHWARD FROM THE NORTHERN  
PLAINS TO THE UPPER GREAT LAKES WILL ALLOW FOR SNOW SHOWERS WITH  
SOME LIGHT ACCUMULATIONS POSSIBLE ACROSS PARTS OF THE UPPER GREAT  
LAKES. BEHIND THE FRONT, VERY COLD TEMPERATURES ARE EXPECTED AS A  
MODIFIED ARCTIC AIRMASS BEGINS DESCENDING SOUTHWARD FROM CENTRAL  
CANADA. AFTERNOON HIGH TEMPERATURES ACROSS PARTS OF THE FAR  
NORTHERN PLAINS COULD BE HOVERING NEAR THE 20 OR 30 DEGREE MARK,  
WHICH IS ALMOST 20 DEGREES BELOW NORMAL FOR THIS TIME OF THE YEAR.  
 
SANTORELLI  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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