852  
FXUS01 KWBC 150759  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
258 AM EST THU FEB 15 2018  
 
VALID 12Z THU FEB 15 2018 - 12Z SAT FEB 17 2018  
 
...HEAVY RAINFALL COULD BRING FLOODING TO PARTS OF THE OHIO VALLEY  
AND NORTHEAST...  
 
...WARM TEMPERATURES EXPECTED ACROSS THE EASTERN U.S. BEFORE A  
STRONG COLD FRONT SWEEPS EASTWARD...  
   
..BENEFICIAL RAIN AND SNOW FOR PARTS OF THE WEST
 
 
WARM, MOIST AIR WILL LIFT THROUGH THE SOUTHERN PLAINS AND THE  
MID-ATLANTIC REGION OVER THE NEXT FEW DAYS, AIDING IN THE  
DEVELOPMENT OF SHOWERS AND THUNDERSTORMS ALONG A COLD FRONT. IN  
THIS REGIME TEMPERATURES WILL BE WELL ABOVE NORMAL ACROSS MUCH OF  
THE SOUTH WITH AFTERNOON HIGHS AVERAGING 20 TO 30 WARMER THAN  
NORMAL. THESE STORMS WILL BE CAPABLE OF PRODUCING HEAVY RAINFALL.  
THE FRONT IS FORECAST TO CONTINUE MOVING SOUTH AND EAST THROUGH  
THE MID-ATLANTIC, OHIO/TENNESSEE VALLEYS, LOWER MISSISSIPPI VALLEY  
AND THE SOUTHERN PLAINS BY LATE FRIDAY. A SWATH OF SCATTERED  
RAINFALL WILL SPAN FROM SOUTHERN NEW MEXICO TO THE CHESAPEAKE BAY.  
THE APPALACHIAN SPINE OF WESTERN PENNSYLVANIA AND WEST VIRGINIA  
COULD HAVE 1 TO 3 INCHES BY EARLY SUNDAY MORNING.  
 
STRONG HIGH PRESSURE WILL MOVE INTO THE NORTHERN AND CENTRAL  
PLAINS IN THE WAKE OF THE COLD FRONT, ALLOWING COLD AIR TO SETTLE  
IN. HIGH TEMPERATURES WILL BE UP TO 30 DEGREES BELOW NORMAL. BY  
FRIDAY, TEMPERATURES BEHIND THE FRONT WILL BE NEAR NORMAL  
THROUGHOUT THE MISSISSIPPI VALLEY AND SOUTHERN PLAINS.  
 
THE PACIFIC NORTHWEST AND PORTIONS OF THE DESERT SOUTHWEST WILL BE  
IN AN ACTIVE WET PATTERN THROUGH THE WEEKEND. ONSHORE FLOW ALONG  
WITH A SERIES OF UPPER-LEVEL DISTURBANCES WILL SPREAD RAIN AND  
MOUNTAIN SNOW ACROSS THE REGION. IN GENERAL, ACCUMULATIONS ARE  
EXPECTED TO BE ON THE LIGHTER SIDE. HOWEVER, GIVEN THAT MODERATE  
TO SEVERE DROUGHT IS PRESENT IN THE SOUTHWEST AND PARTS OF THE  
CENTRAL GREAT BASIN, THE RAINFALL AND HIGHER ELEVATION SNOW SHOULD  
ALLEVIATE THESE CONDITIONS.  
 
CAMPBELL/REINHART  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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