273  
FXUS01 KWBC 252046  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION...CORRECTION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
345 PM EST MON FEB 25 2019  
 
VALID 00Z TUE FEB 26 2019 - 00Z THU FEB 28 2019  
 
...HEAVY RAINS FOR NORTHERN/CENTRAL CALIFORNIA, WITH FLOODING  
POSSIBLE...  
 
...HEAVY SNOW EXPECTED IN THE CASCADES, SIERRA NEVADA, TETONS, AND  
SAWTOOTH MOUNTAINS...  
 
...TEMPERATURES WILL BE 20 TO 30 DEGREES BELOW AVERAGE FROM THE  
NORTHERN HIGH PLAINS TO THE UPPER GREAT LAKES AND THE CENTRAL  
PLAINS...  
 
...HIGH WIND WEAKEN FOR THE MID-ATLANTIC TO NORTHEAST LATER  
TODAY...  
 
A DEEP UPPER-LEVEL LOW JUST OFF THE NORTHWEST COAST WILL LINGER  
OVER THE REGION THROUGH WEDNESDAY EVENING. A PLUME OF MOISTURE  
OFF THE PACIFIC WILL STREAM INTO CENTRAL CALIFORNIA THROUGH  
WEDNESDAY MORNING WHEN THE MOISTURE AXIS MOVES FARTHER SOUTH INTO  
SOUTHERN CALIFORNIA BY WEDNESDAY EVENING. THE MOISTURE AND  
UPPER-LEVEL ENERGY WILL AID IN PRODUCING RAIN OVER PARTS OF THE  
SOUTHERN OREGON COAST INTO NORTHERN/CENTRAL CALIFORNIA WITH THE  
RAIN EXITING OREGON OVERNIGHT MONDAY. THE RAIN WILL BE HEAVY AT  
TIMES AND CONTINUE INTO WEDNESDAY. SNOW, HEAVY AT TIMES, WILL  
DEVELOP OVER THE HIGHER ELEVATIONS OF NORTHERN/CENTRAL CALIFORNIA  
THROUGH WEDNESDAY. SNOW WILL ALSO DEVELOP OVER INTERIOR PARTS OF  
THE NORTHWEST THROUGH WEDNESDAY, TOO. LIKEWISE, SNOW WILL DEVELOP  
OVER THE NORTHERN INTERMOUNTAIN REGION INTO THE NORTHERN ROCKIES  
THAT WILL EXPAND INTO THE NORTHERN PLAINS BY OVERNIGHT MONDAY.  
SNOW WILL CONTINUE OVER THE REGION INTO WEDNESDAY.  
 
MEANWHILE, ENERGY RACING OUT OVER THE NORTHERN TIER STATES WILL  
MOVE ACROSS THE UPPER GREAT LAKES ON WEDNESDAY. THE ENERGY WILL  
AID IN PRODUCING SNOW OVER PARTS OF THE UPPER GREAT LAKES/UPPER  
MISSISSIPPI VALLEY OVERNIGHT TUESDAY, EXPANDING INTO THE LOWER  
GREAT LAKES BY WEDNESDAY EVENING. MOISTURE FROM THE WESTERN GULF  
OF MEXICO WILL STREAM NORTHWARD OVER THE WESTERN GULF COAST THAT  
WILL EXPAND INTO THE EASTERN/CENTRAL GULF COAST BY TUESDAY MORNING  
THAT WILL CONTINUE INTO WEDNESDAY. IN ADDITION, IMPULSES OF  
UPPER-LEVEL ENERGY WILL AID IN PRODUCING RAIN WITH EMBEDDED  
THUNDERSTORMS OVER THE WESTERN GULF COAST INTO THE CENTRAL GULF  
COAST OVERNIGHT MONDAY. THE RAIN WITH EMBEDDED THUNDERSTORMS WILL  
EXPAND INTO THE EASTERN GULF COAST ON TUESDAY. OVERNIGHT TUESDAY,  
THE RAIN AND EMBEDDED THUNDERSTORMS WILL MOVE INTO PARTS OF THE  
SOUTHEAST. ON TUESDAY AFTERNOON, AS MOISTURE MOVES NORTHWARD OVER  
THE SOUTHERN/CENTRAL PLAINS, RAIN WILL DEVELOP OVER THE AREA.  
WITH THE COLD AIR OVER THE PLAINS, POCKETS OF RAIN/FREEZING RAIN  
WILL DEVELOP OVER PARTS OF THE CENTRAL/SOUTHERN PLAINS ON  
WEDNESDAY.  
 
THE STRONG PRESSURE GRADIENT OVER THE NORTHEAST WILL SLOWLY WEAKEN  
MONDAY NIGHT, ENDING THE HIGH WIND THREAT. IN THE WAKE OF THE  
EXITING SYSTEM THAT AIDED IN PRODUCING THE HIGH WIND, LAKE EFFECT  
SNOW WILL DEVELOP DOWNWIND OF LAKE ONTARIO THROUGH TUESDAY  
AFTERNOON.  
 
ZIEGENFELDER  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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