337  
FXUS01 KWBC 262000  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
400 PM EDT TUE MAR 26 2019  
 
VALID 00Z WED MAR 27 2019 - 00Z FRI MAR 29 2019  
 
...ACTIVE WEATHER PATTERN ACROSS THE WEST BUT RELATIVELY QUIET  
EAST OF THE ROCKIES THROUGH WEDNESDAY...  
 
...SHOWERS AND THUNDERSTORMS ARE EXPECTED TO DEVELOP OVER THE  
CENTRAL PLAINS WEDNESDAY NIGHT...  
 
MUCH OF THE EASTERN TWO-THIRDS OF THE COUNTRY WILL REMAIN UNDER  
THE INFLUENCE OF A LARGE HIGH PRESSURE SYSTEM WITH FINE WEATHER  
FOR THE NEXT COUPLE OF DAYS. ON THE OTHER HAND, ACTIVE WEATHER  
WILL BE THE FOCUS ACROSS THE WESTERN U.S. AS A LARGE UPPER-LEVEL  
CYCLONE SENDS WAVES OF DISTURBANCES INTO THE AREA. MOISTURE  
CURRENTLY MOVING ACROSS NORTHERN CALIFORNIA IS EXPECTED TO EXPAND  
TOWARD THE NORTHEAST INTO THE INTERMOUNTAIN REGION THROUGH TONIGHT  
AND INTO WEDNESDAY MORNING. TEMPERATURES OVER THE HIGHER  
ELEVATIONS WILL BE COLD ENOUGH TO SUPPORT WET SNOW WHILE  
THUNDERSTORMS COULD DEVELOP DURING WEDNESDAY AFTERNOON FROM THE  
GREAT BASIN INTO THE INTERMOUNTAIN REGION. UP TO A COUPLE OF FEET  
OF HEAVY SNOW WILL ONCE AGAIN BE POSSIBLE FOR THE SIERRA NEVADA.  
 
MEANWHILE, THE CENTER OF THE LARGE HIGH PRESSURE SYSTEM OVER THE  
EASTERN U.S. WILL BEGIN TO MOVE OFF THE EAST COAST ON WEDNESDAY,  
WHERE CHILLY MORNING TEMPERATURES WILL MODERATE TO ABOVE NORMAL  
LEVELS BY THURSDAY AFTERNOON. THE RETURN FLOW FROM THE SOUTH  
BEHIND THE HIGH PRESSURE SYSTEM WILL ALSO BRING INCREASING  
MOISTURE TOWARD A COLD FRONT WHICH IS FORECAST TO DIP SOUTHWARD  
INTO THE CENTRAL PLAINS THURSDAY MORNING. THIS INTERACTION WILL  
TRIGGER SHOWERS AND THUNDERSTORMS OVER THE CENTRAL PLAINS  
WEDNESDAY NIGHT INTO THURSDAY MORNING, WHICH SHOULD THEN EXPAND  
EASTWARD INTO THE MIDWEST THURSDAY AFTERNOON. PARTS OF THE  
NORTHEAST WILL ALSO SEE RAIN MOVING INTO THE AREA ON THURSDAY,  
WITH THE POSSIBILITY OF WINTRY PRECIPITATION OVER NORTHERN NEW  
ENGLAND AS A COLD FRONT APPROACHES.  
 
MEANWHILE, HIGH-ELEVATION SNOWS AND VALLEY RAINS WILL CONTINUE TO  
SPREAD EASTWARD INTO THE NORTHERN AND CENTRAL ROCKIES ON THURSDAY.  
MUCH OF THE SOUTHEAST AND SOUTHERN ROCKIES WILL REMAIN DRY  
THROUGH THURSDAY.  
 
A LINGER FRONTAL WAVE SUPPORTED BY AN UPPER-LEVEL LOW WILL TRIGGER  
SHOWERS AND THUNDERSTORMS ACROSS THE SUNSHINE STATE THROUGH  
WEDNESDAY MORNING. THE RAIN SHOULD TAPER OFF FROM WEST TO EAST BY  
WEDNESDAY NIGHT AS THE SYSTEM MOVES GRADUALLY AWAY INTO THE  
ATLANTIC.  
 
KONG  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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