981  
FXUS01 KWBC 201949  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
349 PM EDT WED MAR 20 2019  
 
VALID 00Z THU MAR 21 2019 - 00Z SAT MAR 23 2019  
 
...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 ROCKIES AS  
WELL...  
 
...A DEVELOPING COASTAL STORM WILL BRING UNSETTLED WEATHER TO THE  
MID-ATLANTIC AND NORTHEAST THROUGH THE END OF THE WEEK...  
 
...HEAVY SNOW IS POSSIBLE ACROSS THE MOUNTAINS OF CENTRAL UTAH AND  
SOUTHWEST COLORADO THURSDAY AND FRIDAY...  
 
DESPITE DRY WEATHER, MAJOR TO HISTORIC AND CATASTROPHIC FLOODING  
WILL CONTINUE ACROSS PARTS OF THE MISSOURI AND MISSISSIPPI RIVER  
BASINS DUE TO RAPID SNOWMELT AS A RESULT OF HEAVY RAINFALL LAST  
WEEK. FLOOD WARNINGS AND ADVISORIES REMAIN IN EFFECT FOR PARTS OF  
THE REGION. AREAL FLOODING IS ALSO A CONCERN ACROSS PARTS OF THE  
NORTHWEST AND NORTHERN ROCKIES/HIGH PLAINS AS WARM TEMPERATURES  
THIS WEEK ARE LEADING TO ACCELERATED SNOWMELT AND THE POTENTIAL  
FOR ICE JAMS.  
 
THE MAIN SENSIBLE WEATHER THREAT IN THE SHORT RANGE WILL BE WITH A  
DEVELOPING COASTAL LOW PRESSURE SYSTEM OFF THE CAROLINA COASTS  
WEDNESDAY EVENING, TRACKING UP THE EAST COAST THROUGH THE END OF  
THIS WEEK. MODERATE TO LOCALLY HEAVY RAINFALL IS LIKELY ACROSS THE  
MID-ATLANTIC STATES ON THURSDAY, SHIFTING NORTHWARD INTO THE  
NORTHEAST BY EARLY FRIDAY. THE POTENTIAL FOR ACCUMULATING SNOWFALL  
EXISTS ACROSS PORTIONS OF THE INTERIOR NORTHEAST AND NORTHERN NEW  
ENGLAND THROUGH THE START OF THIS WEEKEND. MEANWHILE, A COUPLE OF  
WEAK FRONTS MOVING THROUGH THE MIDWEST WILL ALLOW FOR MAINLY LIGHT  
RAIN FROM THE MID-MISSISSIPPI VALLEY TO THE OHIO VALLEY THURSDAY  
AND FRIDAY, WITH SOME LIGHT SNOWS ALSO POSSIBLE ACROSS THE UPPER  
GREAT LAKES.  
 
AN OCCLUDED/COLD FRONT MOVING THROUGH CALIFORNIA THIS AFTERNOON  
AND INTO THE SOUTHWEST STATES BY THURSDAY WILL BRING INCREASED  
CHANCES FOR RAIN AND MOUNTAIN SNOWS TO CALIFORNIA, THE CENTRAL  
GREAT BASIN, AND INTO THE SOUTHWEST/FOUR CORNERS REGION. SNOWFALL  
TOTALS OVER A FOOT ARE POSSIBLE ACROSS THE HIGHER ELEVATIONS OF  
UTAH AND SOUTHWEST COLORADO. ANOTHER COLD FRONT WILL ENTER THE  
WEST COAST AND PACIFIC NORTHWEST BY LATE FRIDAY AND BRING ANOTHER  
ROUND OF RAIN AND MOUNTAIN SNOW.  
 
HAPPY VERNAL EQUINOX!  
 
SNELL  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.

The Nexlab HPC Page Main Text Page