504  
FXUS01 KWBC 140652  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
152 AM EST THU DEC 14 2017  
 
VALID 12Z THU DEC 14 2017 - 12Z SAT DEC 16 2017  
   
..LINGERING FIRE WEATHER CONCERNS FOR SOUTHERN CALIFORNIA
 
 
   
..COLD TO LINGER ACROSS THE NORTHEAST INTO THE WEEKEND
 
 
WARM AND DRY CONDITIONS WILL PERSIST ACROSS SOUTHERN CALIFORNIA  
THROUGH AT LEAST FRIDAY WHICH WILL PROLONG ONGOING CONDITIONS  
FAVORABLE FOR WILDFIRE GROWTH. STRENGTHENING WINDS TODAY WILL  
ALLOW FOR AN INCREASE TO "CRITICAL" CONDITIONS PER THE LATEST  
FORECAST FROM THE STORM PREDICTION CENTER, BUT THERE WILL BE SOME  
DIURNAL SWINGS EXPECTED IN WIND STRENGTH INTO THE WEEKEND.  
 
AN APPROACHING COLD FRONT WILL BRING LIGHT RAIN AND MOUNTAIN SNOW  
TO PORTIONS OF THE PACIFIC NORTHWEST BEGINNING FRIDAY MORNING,  
REPLACING POOR AIR QUALITY CURRENTLY IN PLACE BENEATH A LARGE  
UPPER LEVEL RIDGE. THE STORM SYSTEM WILL BE QUICK MOVING AND WILL  
NOT HAVE MUCH MOISTURE TO WORK WITH WHICH WILL LIMIT RAIN AND SNOW  
TOTALS.  
 
ACROSS THE GREAT LAKES AND NORTHEAST U.S., UPPER LEVEL TROUGHING  
WILL REMAIN IN PLACE INTO THE WEEKEND WHICH WILL KEEP THE REGIONS  
HIGH TEMPERATURES ABOUT 5 TO 15 DEGREES BELOW AVERAGE FOR  
MID-DECEMBER. AFTER THE DEPARTURE OF SNOW FROM A STORM SYSTEM NEAR  
LONG ISLAND THIS MORNING, LAKE EFFECT SNOW SHOWERS WILL BE COMMON  
DOWNWIND OF THE LAKES BUT AN UPPER LEVEL DISTURBANCE ARRIVING  
ACROSS MICHIGAN ON FRIDAY WILL BRING INCREASED COVERAGE OF SNOW.  
SNOWFALL ACCUMULATIONS AWAY FROM THE LAKE SHORE WILL BE LIGHT FROM  
THIS NEXT SYSTEM, EXTENDING FROM NORTHERN INDIANA/OHIO INTO  
NORTHERN PENNSYLVANIA AND UPSTATE NEW YORK. LIGHT TO MODERATE  
ACCUMULATIONS RESULTING FROM LAKE EFFECT SNOW BANDS WILL BE FOUND  
ALONG THE MICHIGAN U.P., NORTHERN LOWER MICHIGAN AND EAST OF LAKE  
ERIE AND ONTARIO THROUGH SATURDAY MORNING.  
 
ACROSS THE GREAT PLAINS, DRY CONDITIONS WILL PERSIST FOR MUCH OF  
THE REGION, WITH TEMPERATURES NEAR AVERAGE TODAY. HOWEVER, RAIN IS  
FORECAST TO CREEP INTO SOUTHERN TEXAS EARLY ON FRIDAY NORTH OF A  
COLD FRONT. FARTHER NORTH, WINDS WILL SHIFT AROUND TO THE WEST AND  
SOUTHWEST FOR FRIDAY AFTERNOON ALLOWING HIGHS TO REACH 10 TO 20  
DEGREES ABOVE AVERAGE FROM THE CENTRAL TO NORTHERN HIGH PLAINS ON  
FRIDAY. SOME ADJUSTMENT TOWARD COOLER IS ANTICIPATED FOR SATURDAY  
UP NORTH WITH THE PASSAGE OF A PACIFIC COLD FRONT, BUT  
TEMPERATURES WILL LIKELY REMAIN ABOVE AVERAGE FOR LOCATIONS FROM  
THE TEXAS/OKLAHOMA BORDER TO EASTERN MONTANA INTO NORTH DAKOTA.  
 
OTTO  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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