179  
FXUS01 KWBC 131959  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
258 PM EST WED DEC 13 2017  
 
VALID 00Z THU DEC 14 2017 - 00Z SAT DEC 16 2017  
   
..LINGERING FIRE WEATHER CONCERNS FOR SOUTHERN CALIFORNIA
 
 
...COLD TO LINGER ACROSS THE NORTHEAST THROUGH THE REST OF THE  
WEEK...  
 
HIGH PRESSURE OVER PORTIONS OF THE WEST WILL HELP MAINTAIN WARM  
AND DRY CONDITIONS; WHICH WILL PROLONG CRITICAL WILDFIRE  
CONDITIONS FOR PORTIONS OF SOUTHERN CALIFORNIA. POOR AIR QUALITY  
WILL PERSIST ACROSS MUCH OF THE PACIFIC NORTHWEST IN THIS PATTERN  
AS WELL. RAIN, AN MOUNTAIN SNOW, WILL BEGIN TO MOVE INLAND  
THURSDAY AFTERNOON AS AN UPPER-LEVEL TROUGH AND ASSOCIATED SURFACE  
FRONT APPROACHES THE COAST... SPREADING TO THE NORTHERN ROCKIES BY  
FRIDAY.  
 
COLD, BREEZY CONDITIONS WERE OBSERVED FOR MOST OF THE NORTHEAST  
AND MID-ATLANTIC REGION TODAY IN THE WAKE OF THE SYSTEM MOVING OUT  
INTO THE ATLANTIC OCEAN. A CLIPPER SYSTEM PASSING THROUGH THE  
GREAT LAKES REGION TODAY WILL BRING AREAL AVERAGES OF 3 TO 6  
INCHES OF SNOW FROM LOWER MICHIGAN TO PENNSYLVANIA. A VAST MAJOR  
OF THIS REGION HAS WINTER STORM WARNINGS AND WINTER WEATHER  
ADVISORIES IN EFFECT. LAKE EFFECT SNOW SHOWERS WILL CONTINUE  
DOWNWIND OF THE GREAT LAKE THROUGH FRIDAY BUT THERE WILL BE ENOUGH  
SHIFTING OF THE WIND DIRECTION TO PREVENT MUCH IN THE WAY OF HEAVY  
ACCUMULATIONS.  
 
A WEAK SYSTEM WILL PUSH SOUTH THROUGH THE PLAINS BRINGING LIGHT  
SNOW SHOWERS(OR A MIX OF RAIN AND SNOW)... WHILE ANOTHER COLD  
FRONT SAGS SOUTHWARD INTO THE SOUTHERN PLAINS, MEXICO AND THE GULF  
OF MEXICO OVER THE NEXT FEW DAYS. SOUTH TEXAS COULD SEE A DECENT  
RAINFALL FRIDAY INTO SATURDAY AS THE COLD FRONT SLOWS ITS PACE.  
 
CAMPBELL  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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