966  
FXUS01 KWBC 012001  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
300 PM EST FRI MAR 01 2019  
 
VALID 00Z SAT MAR 02 2019 - 00Z MON MAR 04 2019  
 
...RAPIDLY INTENSIFYING LOW PRESSURE SYSTEM EXPECTED TO SPREAD  
WINTRY PRECIPITATION INTO NEW ENGLAND TONIGHT AND SATURDAY...  
 
...A PACIFIC CYCLONE WILL BRING WIDESPREAD PRECIPITATION ACROSS  
MUCH OF THE SOUTHWESTERN U.S. THROUGH SATURDAY...  
 
...TEMPERATURES WILL BE 20 TO 30 DEGREES BELOW AVERAGE OVER THE  
NORTHERN HIGH PLAINS...  
 
...A DEVELOPING LOW PRESSURE SYSTEM OVER THE SOUTHERN PLAINS ON  
SUNDAY COULD BRING FLOODING RAINS AND SEVERE THUNDERSTORMS ACROSS  
THE SOUTHEAST SUNDAY NIGHT...  
 
...THE SAME LOW PRESSURE SYSTEM WILL LIKELY BRING A WIDE SWATH OF  
SNOW FROM THE OHIO VALLEY TOWARD THE NORTHEAST SUNDAY NIGHT...  
 
QUITE AN ACTIVE WEATHER PATTERN IS SHAPING UP ACROSS THE COUNTRY  
THROUGH THIS WEEKEND AS LOW PRESSURE SYSTEMS ARE FORECAST TO  
INTERACT WITH THE AN ARCTIC AIR MASS ANCHORED OVER THE NORTHERN  
AND CENTRAL U.S. FIRST OF ALL, A RELATIVELY COMPACT LOW PRESSURE  
SYSTEM IS FORECAST TO INTENSIFY AS IT MOVES NORTHEASTWARD PASSING  
JUST OFF CAPE COD DURING THE DAY ON SATURDAY. TEMPERATURES WILL  
BE COLD ENOUGH TO SUPPORT SNOW FOR MUCH OF SOUTHERN NEW ENGLAND  
TONIGHT AND EARLY ON SATURDAY WHILE MIXED PRECIPITATION IS MORE  
LIKELY NEAR THE COAST. THE SNOW WILL THEN SPREAD ACROSS COASTAL  
MAINE BEFORE TAPERING OFF DURING SATURDAY AFTERNOON AS THE LOW  
MOVES OUT TO SEA. FARTHER INLAND, SOME SNOW WILL SPREAD ACROSS  
THE GREAT LAKES TONIGHT AS A CLIPPER SYSTEM MOVES THROUGH. THIS  
SYSTEM IS FORECAST TO WEAKEN AND BRING SOME ADDITIONAL SCATTERED  
LIGHT SNOW INTO NEW ENGLAND SATURDAY EVENING.  
 
MEANWHILE, MOISTURE FROM AN ENERGETIC PACIFIC CYCLONE IS MOVING  
ONSHORE INTO CALIFORNIA. THE LONG FETCH OF MOISTURE ASSOCIATED  
WITH THIS SYSTEM IS EXPECTED TO BRING WIDESPREAD PRECIPITATION  
ACROSS MUCH OF THE SOUTHWESTERN U.S. THROUGH SATURDAY. THE MAIN  
ENERGY OF THIS SYSTEM IS FORECAST TO MOVE OFF THE CENTRAL/SOUTHERN  
ROCKIES SATURDAY NIGHT AND INTERACTS WITH AN ARCTIC FRONT DRAPED  
ACROSS THE SOUTHERN PLAINS. A LOW PRESSURE SYSTEM WILL FORM ALONG  
THE ARCTIC FRONT SUNDAY MORNING AS SNOW IS EXPECTED TO EXPAND  
ACROSS THE CENTRAL PLAINS TOWARD THE MIDWEST WITH A BAND OF MIXED  
PRECIPITATION ON THE SOUTHERN EDGE. SHOWERS AND THUNDERSTORMS ARE  
ALSO EXPECTED TO EXPAND EASTWARD ACROSS THE DEEP SOUTH.  
CONDITIONS WILL EVEN SUPPORT HEAVY RAIN AND SEVERE THUNDERSTORMS  
TO MOVE ACROSS AREAS EAST OF THE LOWER MISSISSIPPI VALLEY SUNDAY  
AFTERNOON INTO SUNDAY NIGHT AS THE LOW PRESSURE SYSTEM INTENSIFY,  
PUSHING A STRONG COLD FRONT ACROSS THE REGION. MEANWHILE, SNOW IS  
EXPECTED TO EXPAND ACROSS THE OHIO VALLEY DURING THE DAY ON SUNDAY  
BEFORE SPREADING TOWARD NEW YORK, PENNSYLVANIA, AND POSSIBLY THE  
NORTHERN MID-ATLANTIC STATES SUNDAY NIGHT. THE PRECIPITATION TYPE  
REMAINS SOMEWHAT UNCERTAIN ALONG THE I-95 CORRIDOR AT THIS TIME.  
 
KONG  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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