552  
FXUS01 KWBC 232002  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
401 PM EDT SUN SEP 23 2018  
 
VALID 00Z MON SEP 24 2018 - 00Z WED SEP 26 2018  
 
...HEAVY TO EXCESSIVE RAINFALL POSSIBLE FROM THE LOWER MISSISSIPPI  
VALLEY TO THE EASTERN TENNESSEE AND OHIO VALLEYS...  
 
...ELEVATED TO CRITICAL FIRE WEATHER THREAT CONTINUES ACROSS THE  
CENTRAL GREAT BASIN AND THE CENTRAL ROCKIES...  
 
MULTIPLE ROUNDS OF HEAVY RAINFALL IS FORECAST TO CONTINUE THROUGH  
MIDWEEK ALONG A NEARLY STATIONARY FRONTAL BOUNDARY STRETCHED FROM  
THE LOWER MISSISSIPPI VALLEY TO THE MID-ATLANTIC. AREAL AVERAGES  
OF 2 TO 3 INCHES ARE FORECAST THROUGH WEDNESDAY AFTERNOON, WITH  
ISOLATED AMOUNTS NEARING 5 INCHES POSSIBLE FOR TENNESSEE AND  
KENTUCKY. THE WPC EXCESSIVE RAINFALL/FLASH FLOOD OUTLOOKS PLACE  
MUCH OF THIS REGION WITHIN A SLIGHT RISK ON TODAY WITH A FOCUSED  
AREA OF CENTRAL TENNESSEE WITH A MODERATE RISK. A MARGINAL TO  
SLIGHT RISK WILL CONTINUE ON MONDAY AND TUESDAY FOR THE OHIO  
VALLEY AND CENTRAL APPALACHIANS. A STRONG CANADIAN HIGH PRESSURE  
SLIDING INTO SOUTHERN CANADA BEHIND THE COLD FRONT WILL KEEP PARTS  
OF THE GREAT LAKES AND NORTHEAST ON THE COOLER SIDE. MUCH OF THE  
SOUTHEAST AND SOUTHERN MID-ATLANTIC WILL REMAIN IN A WARM AND  
HUMID AIRMASS OVER THE NEXT FEW DAYS.  
 
LIGHT AND SCATTERED SHOWERS ARE SPREADING ACROSS THE NORTHERN  
ROCKIES AND ADJACENT HIGH PLAINS THIS AFTERNOON AS AN UPPER LEVEL  
SYSTEM MOVES THROUGH THE NORTHWEST. THIS SYSTEM WILL INCREASE THE  
THREAT FOR RAIN AND THUNDERSTORMS ALONG A COLD FRONT FROM THE  
UPPER MIDWEST TO THE CENTRAL PLAINS MONDAY AND TUESDAY. WARMER AND  
DRIER CONDITIONS ARE EXPECTED TO PERSIST ACROSS PARTS OF THE GREAT  
BASIN AND INTERMOUNTAIN REGION, WHICH WILL MAINTAIN THE ELEVATED  
TO CRITICAL FIRE DANGER. NUMEROUS RED FLAG WARNINGS REMAIN IN  
EFFECT ACROSS PORTIONS OF NEVADA, UTAH, WYOMING AND LONG WITH A  
FEW COUNTIES IN SOUTH DAKOTA, NEBRASKA, COLORADO, NORTHERN  
CALIFORNIA AND SOUTHWEST OREGON.  
 
CAMPBELL  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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