085  
FXUS01 KWBC 311935  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
234 PM EST THU JAN 31 2019  
 
VALID 00Z FRI FEB 01 2019 - 00Z SUN FEB 03 2019  
 
...HEAVY RAIN ALONG THE COAST AND HEAVY SNOW IN THE SIERRA NEVADA  
EXPECTED IN CALIFORNIA...  
 
...TEMPERATURES FINALLY REBOUND AS ARCTIC AIRMASS MOVES AWAY FROM  
THE NORTH AND EASTERN U.S...  
 
HEAVY RAIN THAT HAS BEEN IMPACTING THE SOUTHERN CALIFORNIA COAST  
WILL WIND DOWN BY LATER TONIGHT AND INTO FRIDAY MORNING AS THE  
UPPER LOW MOVES INTO NORTHERN MEXICO. SOME LIGHT SHOWERS/HIGHER  
ELEVATION SNOW IS POSSIBLE IN ARIZONA ON FRIDAY MORNING ASSOCIATED  
WITH THIS SYSTEM. HOWEVER, A DIGGING TROUGH WILL BEGIN TO APPROACH  
THE WEST COAST BY FRIDAY AFTERNOON. PRECIPITATION WILL START THAT  
MORNING, INCREASING SIGNIFICANTLY BY THE AFTERNOON. MOST OF THE  
HEAVY PRECIPITATION IN THE PACIFIC NORTHWEST AND NORTHERN  
CALIFORNIA WILL OCCUR ON FRIDAY AS A FRONTAL SYSTEM MOVES OVER THE  
REGION. SNOW IS EXPECTED FOR THE WASHINGTON CASCADES, WITH EVEN  
LIGHTER AMOUNTS FOR THE OREGON CASCADES AND HIGHER ELEVATION IN  
NORTHERN CALIFORNIA. PRECIPITATION WILL INCREASE SIGNIFICANTLY ON  
SATURDAY--BRINGING HEAVY RAIN ALONG THE COAST ALONG WITH VERY  
HEAVY SNOWFALL FOR THE SIERRA NEVADA. FLASH FLOODING AND DEBRIS  
FLOWS WILL BE A CONCERN PARTICULARLY NEAR BURN SCAR AREAS.  
ADDITIONALLY, SNOW TOTAL ACCUMULATIONS FROM FRIDAY AFTERNOON  
THROUGH THE WEEKEND IN THE SIERRA NEVADA COULD REACH 5 FEET FOR  
ELEVATION ABOVE 5000 FEET! MONITOR ALL LOCAL WATCHES, WARNINGS AND  
ADVISORIES WITH THIS EVENT AT WWW.WEATHER.GOV.  
 
THE END LIFE-THREATENING COLD THAT HAS GRIPPED THE UPPER MIDWEST  
AND GREAT LAKES, IN ADDITION TO THE OHIO VALLEY, MID-ATLANTIC, AND  
NORTHEAST, IS FINALLY NEAR AS THE UPPER LOW CAUSING THIS BEGINS TO  
LIFT NORTHWARD INTO EASTERN CANADA. BY FRIDAY, TEMPERATURES IN THE  
UPPER MIDWEST WILL FINALLY REBOUND TO WELL ABOVE ZERO--WITH HIGH  
TEMPERATURES MAKING IT INTO THE TEENS AND LOW 20S. BY SATURDAY,  
HIGH TEMPERATURES WILL BE IN THE 30S AND EVEN LOW 40S.  
ADDITIONALLY, THE CENTRAL PLAINS WILL SEE TEMPERATURES IN THE LOW  
60S--WHICH IS NEARLY 20-25 DEGREES ABOVE NORMAL.  
 
ELSEWHERE, THE SNOW DOWNWIND OF THE GREAT LAKES WILL FINALLY BEGIN  
WINDING DOWN BY TONIGHT AND INTO TOMORROW. A CLIPPER SYSTEM WILL  
DELIVER LIGHT SNOW ALONG THE CENTRAL APPALACHIANS AND PORTIONS OF  
THE MID-ATLANTIC BY FRIDAY AFTERNOON--WITH SOME LIGHT SHOWERS  
STRETCHING INTO THE LOWER MISSISSIPPI VALLEY. A WAVY FRONTAL  
BOUNDARY IN THE GULF OF MEXICO WILL PROVIDE FOCUS FOR SHOWERS AND  
POSSIBLE EMBEDDED THUNDERSTORMS FOR THE WESTERN GULF COAST THROUGH  
SATURDAY.  
 
REINHART  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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