630  
FXUS01 KWBC 211929  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
328 PM EDT THU MAR 21 2019  
 
VALID 00Z FRI MAR 22 2019 - 00Z SUN MAR 24 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 OVER SOUTHEAST VIRGINIA  
THIS EVENING, TRACKING UP THE EAST COAST THROUGH TONIGHT 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 LIKELY WELL INLAND ACROSS  
PORTIONS OF THE INTERIOR NORTHEAST, WHERE WINTER STORM WARNINGS  
HAVE BEEN ISSUED. 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 ACROSS THE FOUR CORNERS REGION THIS  
EVENING WILL CONTINUE TO PRODUCE RAIN AND MOUNTAIN SNOWS ACROSS  
PARTS OF THE SOUTHWEST AND INTO THE SOUTHERN ROCKIES THROUGH  
FRIDAY. 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 AND SATURDAY. 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. BY SATURDAY, LIGHT RAIN  
WILL BE POSSIBLE ACROSS AREAS SEEING THE HIGHEST IMPACTS, WHICH  
WILL ONLY EXACERBATE ONGOING FLOODING. 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.  
 
SNELL  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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