621  
FXUS01 KWBC 230720  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
219 AM EST THU NOV 23 2017  
 
VALID 12Z THU NOV 23 2017 - 12Z SAT NOV 25 2017  
 
...HEAVY RAINFALL POSSIBLE ACROSS PORTIONS OF FLORIDA THURSDAY AND  
FRIDAY...  
 
...WET WEATHER AND LOCALIZED HEAVY RAINFALL POSSIBLE THURSDAY  
ACROSS THE PACIFIC NORTHWEST...  
 
...WELL ABOVE NORMAL TEMPERATURES LIKELY ACROSS THE NORTHERN AND  
CENTRAL PLAINS THURSDAY AND FRIDAY...  
 
A SURFACE LOW CURRENTLY IN THE EASTERN GULF OF MEXICO WILL MOVE  
ACROSS THE NORTHERN FLORIDA PENINSULA ON THURSDAY. EXPECT SHOWERS  
AND THUNDERSTORMS, WITH HEAVY RAINFALL POSSIBLE, TO ACCOMPANY THIS  
SYSTEM DURING THE THANKSGIVING HOLIDAY AND INTO FRIDAY ACROSS  
NORTHERN AND CENTRAL FLORIDA. THE WEATHER SHOULD DRY OUT BY THE  
WEEKEND AS THE LOW MOVES FARTHER NORTH AND EAST INTO THE WESTERN  
ATLANTIC AND SURFACE HIGH PRESSURE MOVES INTO THE REGION.  
 
IT ALSO LOOKS TO BE A WET HOLIDAY FOR THOSE ACROSS THE NORTHWEST  
AS A COLD FRONT CROSSING THE REGION WILL BRING RAIN AND MOUNTAIN  
SNOWS TO PLACES FROM THE PACIFIC NORTHWEST INTO THE NORTHERN  
ROCKIES. LOCALIZED HEAVY RAINFALL AND FLOODING WILL BE POSSIBLE  
ACROSS PORTIONS OF NORTHWEST WASHINGTON ON THURSDAY BUT FARTHER  
EAST, LIMITED MOISTURE AVAILABILITY WOULD MEAN ACTIVITY SHOULD BE  
MORE SCATTERED AND LIGHT TO MODERATE IN INTENSITY. SOME LIGHT  
ACCUMULATING SNOWS ARE ALSO POSSIBLE IN THE HIGHER TERRAIN OF THE  
WASHINGTON CASCADES, BUT SIGNIFICANT ACCUMULATIONS ARE NOT  
EXPECTED. CONDITIONS ACROSS THE NORTHWEST ARE EXPECTED TO DRY OUT  
AFTER THE PASSAGE OF THE FRONT, BUT THE PACIFIC NORTHWEST WHICH  
SHOULD SEE ANOTHER ROUND OF SHOWERS BY THE WEEKEND AS A SECOND  
COLD FRONT APPROACHES THE REGION.  
 
ACROSS THE NORTHERN AND CENTRAL PLAINS, TEMPERATURES AHEAD OF THIS  
COLD FRONT WILL BE VERY WARM, WITH AFTERNOON HIGHS ON THURSDAY AND  
FRIDAY AS MUCH AS 20 TO 35 DEGREES ABOVE NORMAL. THE SAME FRONT  
WILL ALSO BRING SOME LIGHT RAINFALL TO PARTS OF THE GREAT LAKES ON  
FRIDAY MOVING INTO THE NORTHEAST BY SATURDAY.  
 
SANTORELLI  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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