055  
FXUS01 KWBC 220719  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
319 AM EDT SUN OCT 22 2017  
 
VALID 12Z SUN OCT 22 2017 - 12Z TUE OCT 24 2017  
   
..LARGE STORM SYSTEM TO AFFECT THE EASTERN HALF OF THE NATION
 
 
HEAVY RAIN AND HIGH ELEVATION SNOW WILL BE THE MAIN WEATHER STORY  
ACROSS THE PACIFIC NORTHWEST AND NORTHERN ROCKIES THROUGH SUNDAY  
MORNING AS A STRONG LOW PRESSURE SYSTEM TRACKS EASTWARD ACROSS THE  
REGION. THIS ATMOSPHERIC RIVER WILL LIKELY RESULT IN SEVERAL  
INCHES OF RAINFALL ACROSS PARTS OF WESTERN OREGON AND WASHINGTON,  
WITH SOME LOCATIONS GETTING IN EXCESS OF FIVE INCHES AS A STORM  
TOTAL BEFORE THE EVENT IS OVER BY SUNDAY NIGHT. CONDITIONS WILL  
IMPROVE MARKEDLY BY MONDAY AND TUESDAY AS A STRONG UPPER LEVEL  
RIDGE BUILDS IN, DISPLACING THE ACTIVE STORM TRACK WELL INTO  
CANADA.  
 
THE COLD FRONT CURRENTLY TRACKING ACROSS THE MISSISSIPPI RIVER  
VALLEY AND TEXAS WILL CONTINUE TRACKING EASTWARD. ALTHOUGH THE  
WORST OF THE SEVERE WEATHER THREAT HAS ENDED, SOME STRONG TO  
SEVERE STORMS WILL STILL BE POSSIBLE ACROSS PARTS OF THE DEEP  
SOUTH ON SUNDAY. WITH A WAVE OF LOW PRESSURE DEVELOPING ALONG  
THIS FRONT OVER THE LOWER MISSISSIPPI RIVER VALLEY, MOISTURE  
INFLOW FROM THE GULF OF MEXICO WILL BE ENHANCED AND THIS COULD  
LEAD TO AREAS OF HEAVY RAINFALL FROM MISSISSIPPI TO THE SOUTHERN  
APPALACHIANS.  
 
ELSEWHERE ACROSS THE CONTINENTAL U.S., EXPECT MILD TO WARM WEATHER  
TO CONTINUE ACROSS THE EAST WITH WIDESPREAD 70S FOR HIGHS THROUGH  
MONDAY BEFORE COOLER CONDITIONS ARRIVE BY THE MIDDLE OF THE WEEK.  
FIRE WEATHER CONCERNS WILL CONTINUE ACROSS PARTS OF CALIFORNIA  
OVER THE NEXT FEW DAYS WITH VERY DRY CONDITIONS AND GUSTY WINDS  
EXPECTED. A BIG HEAT WAVE IS ALSO IN THE FORECAST FOR SOUTHERN  
CALIFORNIA, WITH WIDESPREAD 90S AND 100S EXPECTED THROUGH TUESDAY.  
 
D. HAMRICK  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.

The Nexlab HPC Page Main Text Page