782  
FXUS01 KWBC 041952  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
251 PM EST TUE DEC 04 2018  
 
VALID 00Z WED DEC 05 2018 - 00Z FRI DEC 07 2018  
 
...STORM SYSTEM TO BRING RAIN AND MOUNTAIN SNOW TO CALIFORNIA  
BEGINNING TONIGHT...  
 
...BLAST OF COLD AIR COMING TO MONTANA, WYOMING INTO THE NORTHERN  
AND CENTRAL PLAINS...  
 
HIGH PRESSURE ACROSS MUCH OF THE NATION HAS ALLOWED FOR A QUIET  
START TO THE SENSIBLE WEATHER IMPACTS EARLY THIS WEEK. CHANGES ARE  
COMING HOWEVER, AT LEAST FOR CALIFORNIA, AS A SLOW MOVING UPPER  
LEVEL DISTURBANCE NEARS THE WEST COAST TONIGHT. WHILE THE TRACK OF  
THE SYSTEM WILL KEEP THE HEAVIEST RAIN/WIND NEAR THE COAST OR  
OFFSHORE, WIND GUSTS UP TO 50 MPH WILL BE POSSIBLE FOR THE  
SOUTHERN SIERRA NEVADA MOUNTAINS INTO THE TRANSVERSE RANGES OF  
SOUTHERN CALIFORNIA THROUGH WEDNESDAY MORNING AS THE ASSOCIATED  
FRONTAL BOUNDARY NEARS THE AREA. RAIN AND HIGHER ELEVATION SNOW  
WILL ALSO BEGIN TO IMPACT THE GOLDEN STATE BY WEDNESDAY MORNING  
WITH LOCALLY HEAVY RAIN POSSIBLE FOR THE CHANNEL ISLANDS INTO  
PORTIONS OF THE SOUTHERN CALIFORNIA COAST THROUGH THE DAY ON  
WEDNESDAY. THERE WILL BE POSSIBLE RUNOFF CONCERNS WHERE HEAVY RAIN  
OVERLAPS WITH SENSITIVE BURN SCAR LOCATIONS. HIGHER ELEVATION SNOW  
FOR THE MOUNTAINS OF SOUTHERN CALIFORNIA AND THE SIERRA NEVADA  
RANGE CAN ALSO BE EXPECTED, ALTHOUGH ACCUMULATIONS SHOULD REMAIN  
FAIRLY LIGHT AS A WHOLE, AS THE SLOW MOVING STORM SYSTEM CONTINUES  
TO IMPACT SOUTHERN PORTIONS OF CALIFORNIA THROUGH MUCH OF  
THURSDAY.  
 
PRECIPITATION FOR THE REMAINDER OF THE U.S. WILL REMAIN RELATIVELY  
LIGHT OR NON-EXISTENT THROUGH MID-DAY THURSDAY GIVEN ANY  
SIGNIFICANT MOISTURE IS DISPLACED WELL OFFSHORE INTO THE WESTERN  
ATLANTIC OR GULF OF MEXICO. A REINFORCING SHOT OF COLDER AIR IS  
FORECAST TO ENTER THE U.S. FROM CANADA WEDNESDAY INTO THURSDAY  
WHICH WILL HAVE THE EFFECT OF BRINGING BELOW AVERAGE TEMPERATURES  
TO A LARGE PORTION OF THE CENTRAL AND NORTHERN HIGH PLAINS TO THE  
MISSISSIPPI RIVER. THURSDAY'S HIGH TEMPERATURES ARE FORECAST TO  
RANGE 10-20 DEGREES BELOW AVERAGE IN THE WAKE OF A COLD FRONT  
STRETCHING FROM THE GREAT LAKES TO THE TEXAS PANHANDLE. LIGHT SNOW  
(NORTHERN LOCATIONS) AND LIGHT RAIN (SOUTHERN LOCATIONS) WILL  
ACCOMPANY THE FRONT AS IT WORKS SOUTH AND EAST BUT PRECIPITATION  
TOTALS WILL STAY VERY LIGHT THROUGH THURSDAY..  
 
OTTO  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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