015  
FXUS01 KWBC 251950  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
250 PM EST MON FEB 25 2019  
 
VALID 00Z TUE FEB 26 2019 - 00Z THU FEB 28 2019  
 
...HEAVY RAIN POSSIBLE FOR NORTHERN/CENTRAL CALIFORNIA, WITH  
FLOODING POSSIBLE...  
 
...HEAVY SNOW EXPECTED IN THE CASCADES, SIERRA NEVADA, TETON, 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 WINDS DOWN FOR THE MID-ATLANTIC TO NORTHEAST
 
 
THE STRONG PRESSURE GRADIENT OVER THE NORTHEAST WILL SLOWLY WEAKEN  
OVERNIGHT MONDAY. 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. 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.  
 
ZIEGENFELDER  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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