481  
FXUS01 KWBC 040743  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
342 AM EDT THU OCT 4 2018  
 
VALID 12Z THU OCT 4 2018 - 12Z SAT OCT 6 2018  
 
...WARM WEATHER CONTINUES FOR THE SOUTHERN U.S. WHILST COLDER  
TEMPERATURES AFFECT THE NORTH-CENTRAL STATES...  
 
A RAPIDLY DEEPENING SURFACE LOW WILL CONTINUE LIFTING NORTH ACROSS  
ONTARIO AND QUEBEC ON THURSDAY AS IT DRAGS A COLD FRONT SOUTHWARD  
ACROSS THE OHIO VALLEY AND THE NORTHEAST U.S. THROUGH THE END OF  
THE WEEK, AND REACHING AS FAR SOUTH AS THE MID-ATLANTIC REGION.  
SHOWERS AND THUNDERSTORMS, WITH LOCALLY HEAVY RAINFALL POSSIBLE,  
ARE POSSIBLE ALONG THE TRAILING COLD FRONT AS IT PROGRESSES ACROSS  
THE OHIO VALLEY ON THURSDAY AND INTO THE NORTHEAST/MID-ATLANTIC ON  
FRIDAY. BEHIND THIS FRONT, A MUCH COLDER CANADIAN SURFACE HIGH  
BUILDS IN ACROSS THE NORTHERN PLAINS AND UPPER MIDWEST, RESULTING  
IN TEMPERATURES ON THE ORDER OF 10 TO 20 DEGREES BELOW NORMAL FOR  
THIS TIME OF YEAR. ACROSS THE SOUTHERN TIER STATES AND THE  
CAROLINAS, IT WILL CONTINUE FEELING LIKE LATE SUMMER WITH HIGHS IN  
THE 85 TO 90 DEGREE RANGE AND PLENTY OF HUMIDITY.  
 
ACROSS THE WESTERN U.S., A DEVELOPING STORM SYSTEM OVER THE  
CENTRAL AND NORTHERN ROCKIES IS EXPECTED TO BRING WIDESPREAD  
VALLEY SHOWERS AND MOUNTAIN SNOW THROUGH EARLY FRIDAY. ONCE THIS  
SURFACE LOW AND FRONT EMERGES OVER THE PLAINS, A CORRIDOR OF HEAVY  
SHOWERS AND STORMS IS FORECAST TO DEVELOP FROM KANSAS TO WISCONSIN  
WITH THE POTENTIAL FOR 1 TO 3 INCHES OF RAINFALL BY SATURDAY  
MORNING. SOME STRONG TO SEVERE THUNDERSTORMS WILL BE POSSIBLE AS  
WELL. A PACIFIC STORM SYSTEM AFFECTING WESTERN WASHINGTON AND  
OREGON ON FRIDAY IS ALSO EXPECTED TO RESULT IN ENHANCED  
PRECIPITATION FOR THAT REGION.  
 
HAMRICK  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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