675  
FXUS01 KWBC 052006  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
405 PM EDT FRI APR 05 2019  
 
VALID 00Z SAT APR 06 2019 - 00Z MON APR 08 2019  
 
...MORE UNSETTLED WEATHER MOVING ACROSS THE WESTERN U.S. THROUGH  
THE WEEKEND...  
 
...STRONG TO SEVERE THUNDERSTORMS FORECAST TO MOVE ACROSS THE  
SOUTHERN PLAINS TOWARD THE LOWER MISSISSIPPI VALLEY THROUGH THE  
WEEKEND...  
 
...RAIN ALONG THE EAST COAST THROUGH TONIGHT AS WINTRY WEATHER  
MOVES INTO NORTHERN NEW ENGLAND...  
 
...SHOWERS AND THUNDERSTORMS EXPECTED TO SPREAD INTO THE OHIO  
VALLEY ON SUNDAY...  
 
AN ACTIVE WEATHER PATTERN OVER THE NORTHEAST PACIFIC WILL CONTINUE  
TO BRING UNSETTLED WEATHER ACROSS A LARGE PORTION OF THE WESTERN  
U.S. AS A SERIES OF FRONTAL SYSTEMS MOVE THROUGH THE REGION. THIS  
WILL KEEP A GOOD CHANCE OF RAIN ALONG THE WEST COAST THROUGH THE  
WEEKEND, AS HIGHER ELEVATION SNOW AND LOWER ELEVATION RAIN SPREAD  
ACROSS THE INTERMOUNTAIN AND THE GREAT BASIN, FOLLOWED BY THE  
NORTHERN AND CENTRAL ROCKIES THROUGH SATURDAY. THE HEAVIEST  
PRECIPITATION OVER THE NEXT FEW DAYS IS EXPECTED TO FALL FROM  
NORTHERN CALIFORNIA NORTHWARD THROUGH THE COASTAL RANGES AND  
CASCADES OF OREGON AND WASHINGTON, WITH LESSER AMOUNTS ELSEWHERE  
ACROSS THE INTERMOUNTAIN WEST. FLOOD WATCHES HAVE BEEN POSTED  
ACROSS PORTIONS OF THIS AREA.  
 
AN UPPER-LEVEL TROUGH WILL PUSH ACROSS THE SOUTHERN ROCKIES  
TONIGHT BEFORE ENTERING THE SOUTHERN PLAINS ON SATURDAY. THIS  
WILL TRIGGER THE NEXT ROUND OF THUNDERSTORMS TO MOVE ACROSS TEXAS  
AHEAD OF A DRY LINE ON SATURDAY. SOME OF THESE THUNDERSTORMS ARE  
EXPECTED TO BE SEVERE. FARTHER NORTH, THE SAME UPPER-LEVEL TROUGH  
COMBINING WITH INSTABILITIES WILL TRIGGER SCATTERED THUNDERSTORMS  
OVER THE CENTRAL TO NORTHERN CENTRAL PLAINS ON SATURDAY AS A COLD  
FRONT APPROACHES FROM THE NORTH. MEANWHILE, SCATTERED  
THUNDERSTORMS CAN BE EXPECTED IN THE SOUTHEAST THROUGH THE NEXT  
COUPLE OF DAYS DUE TO A FRONT LANGUISHING ACROSS THE REGION.  
 
MOISTURE AHEAD OF LOW PRESSURE WAVES TOGETHER WITH A DISTURBANCE  
ALOFT WILL GRADUALLY PUSH THE RAIN OFF THE EAST COAST THROUGH  
TONIGHT INTO SATURDAY MORNING. WITHIN ITS NORTHERN PERIPHERY,  
SNOW IS EXPECTED TO MOVE ACROSS NORTHERN NEW ENGLAND. THE  
PRECIPITATION SHOULD MOVE OFF THE EAST COAST DURING THE DAY ON  
SATURDAY AS A LOW PRESSURE CENTER IS FORECAST TO MOVE OUT OF NORTH  
CAROLINA AND OUT TO SEA.  
 
BY SUNDAY, THE NEXT SYSTEM SHOULD EXIT THE WESTERN U.S. AND ENTER  
THE SOUTHERN PLAINS. THIS WILL TRIGGER THE NEXT ROUND OF  
THUNDERSTORMS NEAR THE TEXAS COAST WHERE HEAVY RAIN MAY DEVELOP  
NEAR A COASTAL FRONT. THE SHOWERS AND THUNDERSTORMS WILL THEN  
EXPAND TOWARD THE NORTH AND EAST INTO THE OHIO VALLEY AND THE  
GREAT LAKES AHEAD OF A LOW PRESSURE SYSTEM MOVING ACROSS THE  
NORTHERN PLAINS.  
 
KONG/ROTH  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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