317  
FXUS01 KWBC 182000  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
300 PM EST SUN NOV 18 2018  
 
VALID 00Z MON NOV 19 2018 - 00Z WED NOV 21 2018  
 
...LIGHT TO MODERATE SNOW ACCUMULATIONS FOR PORTIONS OF THE UPPER  
GREAT LAKES AND NORTHEAST THROUGH TUESDAY...  
 
...ELEVATED THREAT FOR WILDFIRES CONTINUES FOR NORTHERN AND  
SOUTHERN CALIFORNIA...  
 
...POOR AIR QUALITY CONTINUES OVER PORTIONS OF CALIFORNIA, OREGON  
AND WASHINGTON...  
 
THE OVERALL WEATHER PATTERN ACROSS THE LOWER 48 WILL REMAIN  
RELATIVELY QUIET INTO THE EARLY PART OF THIS WEEK WITH NO MAJOR  
STORM SYSTEMS TO NOTE. OUT WEST THOUGH, THE SUBDUED WEATHER WILL  
CONTINUE TO FEATURE HIGH PRESSURE OVER THE INTERMOUNTAIN WEST WITH  
COLD FRONTS AND PRECIPITATION REMAINING OFFSHORE DUE TO A BLOCKING  
UPPER RIDGE OVER THE WEST COAST. THE RESULT WILL BE POOR AIR  
QUALITY WITH SMOKE AND LOW LEVEL POLLUTANTS ALONG WITH A CONTINUED  
ELEVATED THREAT FOR THE SPREADING OF WILDFIRES IN SOUTHERN AND  
NORTHERN CALIFORNIA GIVEN GUSTY WINDS AND LOW RELATIVE HUMIDITIES.  
THERE IS AN ONGOING THREAT ACROSS NORTHERN CALIFORNIA IN  
CONJUNCTION WITH THE CURRENTLY BURNING CAMP FIRE IN THE FOOTHILLS  
OF THE SIERRA NEVADA, BUT THE THREAT FOR ADDITIONAL WILDFIRES WILL  
SHIFT INTO SOUTHERN CALIFORNIA FOR MONDAY AS GUSTY WINDS SUBSIDE  
SOME UP NORTH. FARTHER NORTH IN THE PACIFIC NORTHWEST, AIR  
STAGNATION ALERTS WILL CONTINUE THROUGH TUESDAY AS SURFACE RIDGING  
CONTINUES.  
 
A COUPLE OF COLD FRONTS WILL WORK THEIR WAY TOWARD THE EAST COAST  
THROUGH TUESDAY BRINGING BELOW AVERAGE TEMPERATURES FROM THE  
NORTH-CENTRAL U.S. AND GREAT LAKES REGION TO TEXAS AND THE CENTRAL  
GULF COAST. LIGHT TO LOCALLY MODERATE SNOW WILL ACCOMPANY TWO WEAK  
AREAS OF LOW PRESSURE FORECAST TO TRACK ACROSS THE GREAT LAKES  
TONIGHT INTO MONDAY AND WITH LOW PRESSURE ORGANIZING OFF OF THE  
NEW ENGLAND COAST FOR TUESDAY. THROUGH THE DAY ON TUESDAY, LAKE  
ENHANCED SNOW SHOWERS SHOULD BRING GENERALLY 3 TO 6 INCHES OF SNOW  
FOR PORTIONS OF FAR NORTHWESTERN WISCONSIN INTO THE U.P. OF  
MICHIGAN AND FAR NORTHERN LOWER MICHIGAN. UPSTATE NEW YORK INTO  
CENTRAL NEW ENGLAND COULD SEE SIMILAR AMOUNTS THROUGH MONDAY  
MORNING WITH THE HEAVIEST EXPECTED FOR PORTIONS OF CENTRAL NEW  
ENGLAND.  
 
ACROSS THE SOUTH, LOW PRESSURE ALONG A SLOW MOVING FRONTAL  
BOUNDARY IN THE WESTERN GULF OF MEXICO WILL KEEP COASTAL TEXAS  
INTO THE LOWER MISSISSIPPI VALLEY WITH SHOWERS AND OCCASIONAL  
THUNDERSTORMS IN THE FORECAST THROUGH MONDAY NIGHT. THE HEAVIEST  
RAINFALL SHOULD REMAIN OFFSHORE WITH NO WIDESPREAD FLOODING  
CONCERNS OVER TEXAS OR LOUISIANA INTO THE MIDDLE OF THE WEEK.  
 
OTTO  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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