742  
FXUS01 KWBC 012035  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
334 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...  
 
...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 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 ACROSS THE CENTRAL APPALACHIANS  
TONIGHT, SPREADING INTO SOUTHERN NEW ENGLAND EARLY ON SATURDAY.  
MIXED PRECIPITATION IS MORE LIKELY NEAR THE COAST. THE SNOW WILL  
THEN SPREAD ACROSS COASTAL MAINE BEFORE TAPERING OFF SATURDAY  
EVENING 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 NIGHT.  
 
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 THEN 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 INTENSIFIES, 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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