046  
FXUS01 KWBC 191949  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
249 PM EST SUN NOV 19 2017  
 
VALID 00Z MON NOV 20 2017 - 00Z WED NOV 22 2017  
 
...HEAVY PRECIPITATION FOR PARTS OF THE NORTHEAST AND PACIFIC  
NORTHWEST WHILE DRY FOR THE CENTRAL STATES...  
 
SCATTERED TO WIDESPREAD PRECIPITATION IS OCCURRING FROM THE UPPER  
MISSISSIPPI VALLEY TO THE OHIO VALLEY AND ACROSS THE NORTHEAST.  
AREAS DOWNWIND OF THE GREAT LAKES ARE OBSERVING ENHANCEMENT FROM  
THE LAKES. COVERAGE AND INTENSITY IS HIGHER OVER EASTERN MAINE  
WITH RELATION TO THE CENTRAL LOW PRESSURE. COOLER AND DRIER AIR  
WILL BEGIN TO FILTER INTO THE REGION ON MONDAY. LAKE SHORE FLOOD  
WARNINGS AND LAKE EFFECT SNOW WARNINGS ARE IN EFFECT FOR COUNTIES  
NEAR LAKE ERIE. WINTER WEATHER ADVISORIES ARE IN EFFECT FOR  
PORTIONS OF NORTHEAST MICHIGAN AND WESTERN NEW YORK. WIDESPREAD  
GUSTY WINDS WILL PERSIST TONIGHT - NUMEROUS WIND ADVISORIES ARE IN  
EFFECT NEAR THE COAST FROM DELAWARE TO SOUTHERN MAINE.  
 
A PLUME OF VERY MOIST AIR... KNOWN AS AN ATMOSPHERIC RIVER... WILL  
MOVE ONSHORE THE PACIFIC NORTHWEST RESULTING IN SEVERAL INCHES OF  
RAINFALL ALONG THE COAST AND LOWER ELEVATIONS AND HEAVY SNOW IN  
THE MOUNTAINS. SOME RANGES MAY REACH OR EXCEED ACCUMULATIONS OVER  
A FOOT.  
 
AN EXPANSIVE HIGH PRESSURE RIDGE WILL EXPAND FROM THE GREAT BASIN  
TO THE SOUTHERN PLAINS; WHICH WILL KEEP CONDITIONS WARM AND DRY.  
FIRE WEATHER CONCERNS WILL PERSIST ACROSS PARTS OF NEW MEXICO AND  
TEXAS WITH THESE DRY AND WINDY CONDITIONS.  
 
CAMPBELL  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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