219  
FXUS01 KWBC 280725  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
225 AM EST TUE NOV 28 2017  
 
VALID 12Z TUE NOV 28 2017 - 12Z THU NOV 30 2017  
 
...LOCALLY HEAVY RAIN/SNOW ACROSS THE OLYMPICS AND WASHINGTON  
CASCADES TODAY...  
   
..VERY MILD TEMPERATURES FOR THE OHIO VALLEY
 
 
A PAIR OF SYSTEMS WILL PUSH THROUGH THE LOWER 48 THROUGH THURSDAY  
IN A RATHER MILD AND DRY PATTERN OTHERWISE. IN THE PACIFIC  
NORTHWEST, A DEEP SURFACE LOW WILL MOVE INTO CENTRAL BRITISH  
COLUMBIA AND DRAG ITS ATTENDANT COLD FRONT INTO WASHINGTON AND  
OREGON LATER TODAY. WINDY CONDITIONS WITH LOCALLY MODEST LOWER  
ELEVATION RAIN AND HIGHER ELEVATION SNOW (ABOVE ABOUT 2500-3000  
FT) WILL SPREAD EAST OF THE CASCADES AND INTO IDAHO AND WESTERN  
MONTANA BY THIS AFTERNOON. THE COLD FRONT WILL CONTINUE TO MARCH  
STEADILY EASTWARD INTO THE HIGH PLAINS BY EARLY WEDNESDAY WITH A  
BIT COOLER AIR IN ITS WAKE. GENERALLY LIGHTER RAIN/SNOW IS  
EXPECTED ACROSS MONTANA AND THAT WILL MOVE EASTWARD THROUGH ND/MN  
LATE WEDNESDAY AND INTO THE WESTERN GREAT LAKES BY THURSDAY  
MORNING WITH SNOW OR A MIX TO THE NORTH AND RAIN TO THE SOUTH.  
ANOTHER SYSTEM WILL APPROACH WESTERN WASHINGTON BY THURSDAY  
MORNING.  
 
TO THE EAST, A COLD FRONT SINKING THROUGH THE PLAINS AND FOUR  
CORNERS REGION TODAY WILL WEAKEN AS IT MOVES INTO THE LOWER  
MISSISSIPPI VALLEY ON WEDNESDAY, BUT NOT BEFORE SOME MODERATE  
RAIN/THUNDERSTORMS BREAK OUT OVER OKLAHOMA LATER TODAY. THE  
NORTHERN PORTION OF THE FRONT WILL CONTINUE TO MOVE EASTWARD OFF  
THE NORTHEAST/MID-ATLANTIC COAST ON WEDNESDAY BUT THE SOUTHERN  
PORTION WILL LINGER AND DISSIPATE OVER EASTERN OK/TX WITH ONLY  
SCATTERED LIGHT SHOWERS AND A RUMBLE OF THUNDER. TEMPERATURES WILL  
BE QUITE MILD AHEAD OF THE FRONT -- 60S TO NEAR 70 DEGREES FROM  
MISSOURI NORTHEASTWARD TO WESTERN PENNSYLVANIA (ABOUT 15-20  
DEGREES ABOVE AVERAGE) THOUGH PERHAPS JUST SHORT OF RECORD HIGHS  
FOR THE DAY.  
 
FRACASSO  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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