818  
FXUS01 KWBC 210654  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
253 AM EDT THU MAR 21 2019  
 
VALID 12Z THU MAR 21 2019 - 12Z SAT MAR 23 2019  
 
...A DEVELOPING COASTAL STORM TO BRING RAIN, INTERIOR AND HIGHER  
ELEVATION SNOWS, AND GUSTY WINDS TO PARTS OF THE MID-ATLANTIC AND  
NORTHEAST...  
 
...A COUPLE ROUNDS OF RAIN AND MOUNTAIN SNOWS LIKELY ACROSS PARTS  
OF THE WEST DURING THE SHORT RANGE, WITH RAIN MOVING INTO THE  
SOUTHERN AND CENTRAL PLAINS BY FRIDAY...  
 
...MAJOR TO HISTORIC RIVER FLOODING WILL CONTINUE ACROSS PARTS OF  
THE MISSISSIPPI AND MISSOURI RIVER BASINS WITH AREAL FLOODING A  
THREAT ACROSS PARTS OF THE NORTHWEST AND NORTHERN PLAINS AS WELL...  
 
THE MAIN SENSIBLE WEATHER THREAT IN THE SHORT RANGE WITH BE A  
DEVELOPING COASTAL LOW PRESSURE SYSTEM OFF THE CAROLINA COASTS  
THIS MORNING, TRACKING UP THE EAST COAST THROUGH THURSDAY AND INTO  
FRIDAY. MODERATE TO LOCALLY HEAVY RAINFALL WILL ACCOMPANY THIS  
SYSTEM ACROSS THE MID-ATLANTIC AND NORTHEAST WITH FLASH FLOODING A  
MARGINAL AND LOCAL THREAT PARTICULARLY FOR HIGHLY URBANIZED AREAS.  
A HANDFUL OF FLOOD WATCHES ARE IN EFFECT ACROSS PARTS OF THE  
MID-ATLANTIC. ACCUMULATING SNOWFALL IS ALSO POSSIBLE WELL INLAND  
ACROSS PORTIONS OF THE INTERIOR NORTHEAST. GUSTY WINDS ARE ALSO  
LIKELY ACROSS THE MID-ATLANTIC AND NORTHEAST INTO THE WEEKEND AS  
THE STORM DEEPENS AS IT MOVES UP THE COAST.  
 
MEANWHILE, A COLD FRONT MOVING INTO THE FOUR CORNERS REGION THIS  
MORNING WILL CONTINUE TO PRODUCE RAIN AND MOUNTAIN SNOWS ACROSS  
PARTS OF THE SOUTHWEST AND INTO THE SOUTHERN ROCKIES ON THURSDAY.  
AS MOISTURE GET DRAWN NORTHWARD FROM THE PACIFIC AHEAD OF THE COLD  
FRONT, PRECIPITATION IS EXPECTED TO SPREAD INTO PARTS OF THE  
SOUTHERN AND CENTRAL PLAINS ON FRIDAY AS WELL. ANOTHER COLD FRONT  
ENTERING THE WEST COAST STATES BY LATE FRIDAY WILL BRING MORE RAIN  
AND HIGHER ELEVATION SNOWS TO CALIFORNIA, THE PACIFIC NORTHWEST,  
AND PARTS OF THE INTERIOR WEST THIS WEEKEND.  
 
MAJOR TO HISTORIC AND CATASTROPHIC FLOODING ACROSS PARTS OF THE  
MISSOURI AND MISSISSIPPI RIVER BASINS WILL CONTINUE THROUGH THE  
SHORT RANGE DUE TO ONGOING EFFECTS FOLLOWING A PERIOD OF RAPID  
SNOW MELT AFTER HEAVY RAINFALL LAST WEEK. FLOOD WARNINGS AND  
ADVISORIES REMAIN FOR PARTS OF THE REGION. AREAL FLOODING IS ALSO  
A CONCERN ACROSS PARTS OF THE NORTHWEST AND INTO THE NORTHERN  
PLAINS AS WARMER TEMPERATURES THE END OF THIS WEEK LEAD TO  
ACCELERATED SNOWMELT AND THE POTENTIAL FOR ICE JAMS.  
 
SANTORELLI  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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