035  
FXUS01 KWBC 131937  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
336 PM EDT SAT APR 13 2019  
 
VALID 00Z SUN APR 14 2019 - 00Z TUE APR 16 2019  
 
...SEVERE THUNDERSTORMS AND FLASH FLOODING EXPECTED TONIGHT FOR  
PORTIONS OF THE LOWER MISSISSIPPI VALLEY AND TENNESSEE VALLEY,  
SHIFTING INTO THE OHIO VALLEY AND THE EAST ON SUNDAY...  
 
...WARM TEMPERATURES IN THE EAST ON SUNDAY, WITH RECORD HIGH  
OVERNIGHT MINS POSSIBLE. TEMPERATURES WILL WARM SIGNIFICANTLY THE  
NEXT FEW DAYS ACROSS THE GREAT PLAINS...  
 
A POTENT SPRING STORM SYSTEM WILL CONTINUE TRACKING THROUGH THE  
LOWER MISSISSIPPI VALLEY INTO THE TENNESSEE VALLEY TONIGHT. STRONG  
THUNDERSTORMS AND HEAVY RAINFALL IS LIKELY FROM THE CENTRAL GULF  
STATES TO THE WESTERN TENNESSEE VALLEY WHERE BOTH SPC AND WPC HAVE  
SLIGHT TO MODERATE RISKS OF SEVERE WEATHER AND EXCESSIVE RAINFALL,  
RESPECTIVELY, CONTINUING THROUGH TONIGHT. REFER TO THE OUTLOOKS  
FROM THESE CENTERS FOR ADDITIONAL DETAILS. BY SUNDAY, THIS STORM  
SYSTEM SHOULD LOSE SOME OF ITS INTENSITY BUT WILL CONTINUE TO POSE  
A THREAT FOR SEVERE STORMS AND LOCALIZED HEAVY TO EXCESSIVE  
RAINFALL FROM THE TENNESSEE VALLEY TO THE OHIO VALLEY AND  
EVENTUALLY MOVING INTO THE EASTERN STATES. SPC HAS A SLIGHT TO  
ENHANCED RISK FOR SEVERE WEATHER FROM THE GULF COAST TO THE OHIO  
VALLEY AND NORTHERN MID-ATLANTIC ON SUNDAY, WHILE WPC HAS A  
MARGINAL TO SLIGHT RISK FOR EXCESSIVE RAINFALL. ON THE NORTH SIDE  
OF THE SYSTEM, TEMPERATURES SHOULD BE COLD ENOUGH TO SUPPORT LIGHT  
TO MODERATE SNOW ACCUMULATIONS FROM NORTHERN ILLINOIS TO LOWER  
MICHIGAN, AND ALSO ACROSS FAR NORTHERN MAINE.  
 
BEHIND THE COLD FRONT, HIGH TEMPERATURE DEPARTURES WILL BE WELL  
BELOW AVERAGE ACROSS THE EASTERN PLAINS AND THE MISSISSIPPI RIVER  
VALLEY ON SUNDAY, WITH DAYTIME HIGHS 10 TO 20+ DEGREES BELOW  
NORMAL, ESPECIALLY ACROSS PARTS OF THE UPPER MIDWEST. IN THE EAST  
ON SUNDAY, TEMPERATURES WILL BE ABOVE AVERAGE, WITH SOME RECORD  
WARM OVERNIGHT TEMPERATURES POSSIBLE. FOLLOWING THE FRONTAL  
PASSAGE, TEMPERATURES TO MODERATE TO NEAR OR BELOW NORMAL BY  
MONDAY. ACROSS THE WESTERN GREAT PLAINS, TEMPERATURES WILL WARM  
SIGNIFICANTLY THIS WEEKEND AND BY MONDAY COULD BE 10 TO 20 DEGREES  
ABOVE NORMAL.  
 
UNSETTLED WEATHER WILL CONTINUE THROUGH THE WEEKEND OUT WEST  
STARTING WITH A COLD FRONT CROSSING THE PACIFIC NORTHWEST STATES  
TONIGHT AND INTO THE NORTHERN INTERMOUNTAIN WEST/ROCKIES TOMORROW.  
RAIN AND HIGHER ELEVATION SNOWS WILL ACCOMPANY THIS SYSTEM, SOME  
MODERATE ACCUMULATIONS POSSIBLE IN THE HIGHER ELEVATIONS. THE BEST  
CHANCE FOR SNOW WILL BE ACROSS PARTS OF NORTHWEST WYOMING WHERE AS  
MUCH AS 1 TO 2 FEET OF SNOW IS POSSIBLE THROUGH MONDAY. YET  
ANOTHER STORM SYSTEM WILL APPROACH THE WEST COAST ON MONDAY,  
BRINGING A RENEWED ROUND OF RAIN AND MOUNTAIN SNOWS FOR THE  
BEGINNING OF THE WORK WEEK TO OREGON AND NORTHERN CALIFORNIA.  
 
SANTORELLI  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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