744  
FXUS01 KWBC 110450  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
1249 AM EDT MON MAR 11 2019  
 
VALID 12Z MON MAR 11 2019 - 12Z WED MAR 13 2019  
   
..HEAVY SNOW EXPECTED IN THE COLORADO ROCKIES MONDAY & TUESDAY
 
 
...SEVERE WEATHER AND HEAVY RAINFALL ACROSS THE SOUTHERN PLAINS  
TUESDAY & WEDNESDAY...  
 
...WIND DRIVEN SNOW FOR PORTIONS OF THE CENTRAL AND NORTHERN  
PLAINS WEDNESDAY INTO WEDNESDAY NIGHT...  
 
SNOWS PERSIST ACROSS THE PORTIONS OF THE CENTRAL ROCKIES AND GREAT  
BASIN THROUGH MONDAY NIGHT AS AN OCCLUDED LOW MOVES OUT OF THE  
SUBTROPICAL PACIFIC AND JUMPS NORTHEASTWARD INTO THE INTERMOUNTAIN  
WEST. PORTIONS OF COLORADO ARE EXPECTED TO RECEIVE UP TO 10-20  
INCHES OF NEW SNOWFALL MONDAY AND TUESDAY. A STRENGTHENING SYSTEM  
TO ITS NORTHWEST, RESPONSIBLE FOR ITS EJECTION, BRINGS A NEW ROUND  
OF COASTAL RAINS TO THE PACIFIC NORTHWEST MONDAY NIGHT INTO  
TUESDAY, WITH INTERIOR SNOWS EXPECTED NEAR AND BEHIND THE SYSTEM'S  
COLD FRONT. WITH TIME, THIS SYSTEM MERGES IN WITH THE DEEPENING  
CYCLONE DEVELOPING IN THE COLORADO HIGH PLAINS WHICH GREATLY  
INCREASES SNOW STORM POTENTIAL ACROSS COLORADO. TEMPERATURES  
ACROSS MUCH OF THE WEST AND INTO THE PLAINS SHOULD BE BELOW TO  
WELL BELOW NORMAL WITH EXPANSIVE SURFACE HIGH PRESSURE ACROSS THE  
CENTRAL U.S. AND THE PACIFIC SYSTEM MOVING INTO THE SOUTHWEST.  
 
AHEAD OF THE SYSTEMS IMPACTING THE WEST, A STATIONARY FRONT ACROSS  
THE GULF COAST STATES AND INTO THE SOUTHERN PLAINS BRINGS THE  
PROMISE OF SHOWERS AND THUNDERSTORMS IN THE FORECAST ON MONDAY AND  
INTO TUESDAY. AS THE LOW IN THE SUBTROPICAL PACIFIC ENTERS THE  
SOUTHWEST BY TUESDAY, SHOWERS AND THUNDERSTORMS INCREASE IN  
COVERAGE ACROSS THE SOUTHERN PLAINS. ATMOSPHERIC CONDITIONS COULD  
BE FAVORABLE TO SUPPORT POTENTIALLY HEAVY RAINFALL AND SEVERE  
WEATHER, ESPECIALLY LATE TUESDAY AFTERNOON INTO WEDNESDAY. BOTH  
WPC AND SPC HAVE HIGHLIGHTED PARTS OF THIS REGION WITHIN A SLIGHT  
RISK FOR FLASH FLOODING AND SEVERE THUNDERSTORMS, RESPECTIVELY,  
FROM TUESDAY INTO EARLY WEDNESDAY. THIS SYSTEM IS FORECAST TO  
CONSOLIDATE INTO A SIGNIFICANT STORM BY WEDNESDAY MORNING AS IT  
ORGANIZES IN SOUTHEAST COLORADO, BRINGING WIND DRIVEN SNOW TO  
PORTIONS OF NORTHEAST COLORADO ON WEDNESDAY AND INTO THE CENTRAL  
AND NORTHERN PLAINS WEDNESDAY NIGHT. TEMPERATURES ACROSS THE  
UPPER MIDWEST ARE EXPECTED TO MODERATE ENOUGH TO SUPPORT RAINFALL  
OVER AN AREA WITH A DEEP SNOW PACK WHICH COULD ACCELERATE SNOW  
MELT WEDNESDAY NIGHT.  
 
IN THE EAST, NEAR OR ABOVE NORMAL TEMPERATURES ON MONDAY SHOULD  
MODERATE BY TUESDAY AS THE CENTRAL U.S. HIGH PRESSURE AREA EXPANDS  
EASTWARD. SNOWS ACROSS THE GREAT LAKES AND NEW ENGLAND SLOWLY  
DECREASE IN COVERAGE AND INTENSITY AS COLD, CYCLONIC FLOW SLOWLY  
DIMINISHES MONDAY INTO TUESDAY.  
 
ROTH/SANTORELLI  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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