899  
FXUS01 KWBC 190633  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
133 AM EST WED DEC 19 2018  
 
VALID 12Z WED DEC 19 2018 - 12Z FRI DEC 21 2018  
   
..INCREASINGLY WET AND MUCH MILDER FOR MOST OF THE EAST
 
 
...SLIGHT RISK OF EXCESSIVE RAINFALL THURSDAY ALONG THE I-95  
CORRIDOR...  
   
..ANOTHER SYSTEM INTO WASHINGTON/OREGON TOMORROW
 
 
THE ONCE POWERFUL FRONT THAT MOVED THROUGH THE PACIFIC NORTHWEST  
WITH A VENGEANCE YESTERDAY WILL MOVE EASTWARD OUT OF THE HIGH  
PLAINS WITH DECREASING PRECIPITATION. MAINLY LIGHT RAIN AND  
MOUNTAIN SNOW IS EXPECTED FOR THE NORTHWEST INTO THE NORTHERN AND  
CENTRAL ROCKIES. FOCUS WILL TURN TO THE SOUTH ALONG THE GULF COAST  
WHERE A SYSTEM WILL ORGANIZE TODAY AND EXPAND ITS PRECIPITATION  
SHIELD TO THE NORTH AND EAST ALONG A FORMING BOUNDARY THROUGH THE  
FLORIDA PANHANDLE. ON THURSDAY THE SYSTEM WILL DEEPEN AS IT PUSHES  
ITS COLD FRONT TOWARD FLORIDA AS THE FLOW OFF THE ATLANTIC  
INCREASES INTO THE CAROLINAS. THIS WILL DRAW IN LARGE AMOUNTS OF  
MOISTURE AND MUCH MILDER TEMPERATURES TO AREAS EAST OF THE  
APPALACHIANS, SUPPORTING THE HEAVY RAIN THREAT FOR MUCH OF THE  
I-95 CORRIDOR FROM FLORIDA NORTHWARD TO THE MID-ATLANTIC ON  
THURSDAY AND THURSDAY NIGHT. THIS WILL PUSH INTO NEW ENGLAND BY  
FRIDAY WITH LOW TEMPERATURES ABOVE THE AVERAGE HIGH FOR THE DATE.  
 
BACK TO THE WEST, ANOTHER SYSTEM WILL MOVE TOWARD THE COAST EARLY  
THURSDAY AS THE LOW CENTER MOVES INTO VANCOUVER ISLAND. MORE  
VALLEY RAIN/MOUNTAIN SNOW IS FORECAST, ESPECIALLY OVER  
SOUTHWESTERN OREGON AND UP THE CASCADES BUT AMOUNTS WILL BE  
SOMEWHAT LIMITED BY THE SPEED OF THE SYSTEM. TEMPERATURES OVER  
MUCH OF THE REST OF THE LOWER 48 WILL BE ABOVE NORMAL EXCEPT FOR  
THE LOWER MISSISSIPPI VALLEY TODAY AND TOMORROW NEAR THE  
ORGANIZING GULF SYSTEM.  
 
FRACASSO  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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