834  
FXUS01 KWBC 040754  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
253 AM EST FRI JAN 04 2019  
 
VALID 12Z FRI JAN 04 2019 - 12Z SUN JAN 06 2019  
 
...WIDESPREAD RAINFALL IMPACTS THE SOUTHEAST TO THE MID-ATLANTIC  
AND NORTHEAST...  
 
...RAIN AND MOUNTAIN SNOWS EXPECTED TO BEGIN IMPACTING CALIFORNIA  
BY THE WEEKEND...  
 
...MUCH ABOVE NORMAL TEMPERATURES LIKELY FROM THE CENTRAL PLAINS  
INTO THE EASTERN STATES FRIDAY AND SATURDAY...  
 
A ROBUST STORM SYSTEM CURRENTLY MOVING THROUGH THE SOUTHEAST WILL  
CONTINUE INTO THE MID-ATLANTIC ON FRIDAY AND OFF THE NORTHEAST  
COAST BY SATURDAY. WIDESPREAD RAIN, LOCALLY HEAVY AT TIMES, WILL  
ACCOMPANY THIS SYSTEM BUT THE QUICK MOVEMENT SHOULD LIMIT THE  
FLASH FLOOD THREAT TO MARGINAL. UPPER LEVEL RIDGING BUILDS BACK IN  
BEHIND THIS SYSTEM WHICH SHOULD KEEP TEMPERATURES ABOVE AVERAGE  
ALL THE WAY FROM THE NORTHERN HIGH PLAINS TO THE EASTERN SEABOARD  
INTO THE WEEKEND WITH AFTERNOON HIGHS 20 TO 30 DEGREES ABOVE  
NORMAL POSSIBLE, ESPECIALLY FOR THE CENTRAL STATES. DUE TO THE  
WARMTH, ANY PRECIPITATION ASSOCIATED WITH THIS SYSTEM WILL BE  
RAIN, WITH THE EXCEPTION OF LIGHT SNOW SHOWERS DOWNWIND OF THE  
GREAT LAKES OR IN NORTHERN MAINE.  
 
MEANWHILE OUT WEST, A WEAKENING UPPER LEVEL SHORTWAVE JUST OFF THE  
NORTHWEST COAST WILL CONTINUE TO ALLOW FOR RAIN AND MOUNTAIN SNOWS  
ACROSS THE PACIFIC NORTHWEST TODAY. A STRONGER STORM MAKES ITS WAY  
TOWARDS THE WEST COAST BY FRIDAY WHICH WILL BEGIN SPREADING  
PRECIPITATION INTO CALIFORNIA AND PARTS OF THE PACIFIC NORTHWEST  
BY THE WEEKEND. HEAVY SNOW ACCUMULATIONS ARE POSSIBLE IN THE  
HIGHER TERRAIN OF NORTHERN CALIFORNIA AND THE SIERRA NEVADAS.  
LIGHT ACCUMULATIONS ARE ALSO POSSIBLE FARTHER NORTH INTO THE  
OREGON/WASHINGTON CASCADES. PRECIPITATION SHOULD SPREAD INTO THE  
SOUTHWEST BY SUNDAY AS THIS SYSTEM PUSHES INLAND. TEMPERATURES OUT  
WEST SHOULD INITIALLY BE NEAR NORMAL, WITH SLIGHTLY BELOW NORMAL  
VALUES CREEPING IN BY THE WEEKEND BENEATH THE MAIN UPPER LEVEL  
TROUGH.  
 
SANTORELLI  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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