017  
FXUS01 KWBC 072001  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
400 PM EDT SUN APR 07 2019  
 
VALID 00Z MON APR 08 2019 - 00Z WED APR 10 2019  
 
...SEVERE WEATHER AND HEAVY RAINFALL CONTINUES INTO TONIGHT ACROSS  
THE LOWER MISSISSIPPI VALLEY AND GULF COAST STATES, WITH SEVERE  
THUNDERSTORMS POSSIBLE ACROSS THE SOUTHEAST ON MONDAY...  
 
...HEAVY RAINFALL LIKELY ACROSS PARTS OF THE PACIFIC NORTHWEST,  
WITH HEAVY SNOWFALL POSSIBLE IN THE HIGHER TERRAIN OF THE NORTHERN  
ROCKIES...  
 
STRONG CONVECTION FROM THE LOWER MISSISSIPPI VALLEY TO THE  
TENNESSEE VALLEY THIS AFTERNOON WILL CONTINUE INTO TONIGHT, WITH  
SEVERE THUNDERSTORMS AND HEAVY RAINFALL POSSIBLE. SPC CONTINUES TO  
HIGHLIGHT MUCH OF THE LOWER MISSISSIPPI VALLEY TO THE TENNESSEE  
VALLEY WITHIN A SLIGHT RISK FOR SEVERE WEATHER, WHILE WPC HAS  
ROUGHLY THE SAME AREA WITHIN A SLIGHT RISK FOR EXCESSIVE  
RAINFALL/FLASH FLOODING THROUGH TOMORROW MORNING. THIS ACTIVITY  
WILL SHIFT EASTWARD ON MONDAY, WITH RAIN AND THUNDERSTORMS ALSO  
LIKELY FARTHER NORTH ALONG A TRAILING COLD FRONT FROM THE  
TENNESSEE VALLEY TO THE OHIO VALLEY, GREAT LAKES, AND THE  
NORTHEAST ASSOCIATED WITH A NORTHERN STREAM SYSTEM. FOR MONDAY,  
SPC HAS A SLIGHT RISK FOR SEVERE WEATHER ACROSS THE SOUTHERN  
MID-ATLANTIC STATES TO PARTS OF THE SOUTHEAST. LOCALLY HEAVY  
RAINFALL IS ALSO POSSIBLE, ESPECIALLY ACROSS THE GULF COAST AND  
TENNESSEE VALLEY. SNOW IS POSSIBLE ACROSS FAR NORTHERN NEW  
ENGLAND, WHERE SNOWFALL TOTALS UP TO A FOOT MAY BE POSSIBLE  
THROUGH TUESDAY AS A PAIR OF SURFACE LOWS TRACK THROUGH THE  
NORTHEAST.  
 
MEANWHILE, AN ATMOSPHERIC RIVER IN THE PACIFIC NORTHWEST WILL  
CONTINUE TO PRODUCE HEAVY RAINFALL ACROSS PARTS OF WESTERN OREGON  
AND FAR NORTHWEST CALIFORNIA WITH MODEL GUIDANCE SHOWING MULTIPLE  
INCHES OF RAIN POSSIBLE. WPC HAS A SLIGHT RISK FOR EXCESSIVE  
RAINFALL/FLASH FLOODING IN THIS REGION THROUGH MONDAY MORNING,  
WITH FLASH FLOOD WATCHES IN EFFECT FOR MANY LOCATIONS AS WELL. THE  
COLD FRONT SHOULD PRESS SOUTH AND EASTWARD ON MONDAY AND TUESDAY  
THROUGH THE NORTHWEST, WITH LOWER ELEVATION RAIN AND MOUNTAIN  
SNOWS LIKELY ACROSS THE GREAT BASIN AND INTERMOUNTAIN WEST STATES.  
THE BEST CHANCE FOR ACCUMULATING SNOWFALL WILL BE IN THE NORTHERN  
ROCKIES.  
 
TEMPERATURES ACROSS MUCH OF THE NATION WILL THE ABOVE AVERAGE ON  
MONDAY WITH THE GREATEST ANOMALIES OF +15 TO +25 DEGREES FROM THE  
CENTRAL PLAINS TO THE NORTHERN MID-ATLANTIC. THE NORTHWEST AND FAR  
NORTHERN STATES SHOULD COOL TO NEAR OR BELOW NORMAL BY TUESDAY,  
WHILE THE REMAINDER OF THE COUNTRY REMAINS WARM. ON TUESDAY,  
TEMPERATURES ACROSS THE SOUTHERN AND CENTRAL HIGH PLAINS COULD BE  
10 TO 20+ DEGREES ABOVE NORMAL.  
 
SANTORELLI  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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