548  
FXUS01 KWBC 081941  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
340 PM EDT WED AUG 08 2018  
 
VALID 00Z THU AUG 09 2018 - 00Z SAT AUG 11 2018  
 
...UNSETTLED WET WEATHER FROM THE EASTERN U.S. TO THE SOUTHERN  
PLAINS THIS EVENING, WITH A LINGERING HEAVY RAINFALL THREAT ACROSS  
THE SOUTH THURSDAY AND FRIDAY...  
   
..NEAR TO RECORD BREAKING HEAT LIKELY OUT WEST
 
 
...MONSOONAL MOISTURE WILL BRING AN ELEVATED HEAVY RAINFALL/FLASH  
FLOOD RISK TO PORTIONS OF THE SOUTHWEST AND SOUTHERN ROCKIES...  
 
EXPECT SHOWERS AND THUNDERSTORMS TO CONTINUE ALONG AND AHEAD OF A  
FRONT FROM THE NORTHEAST TO THE SOUTHERN PLAINS THIS AFTERNOON AND  
INTO TONIGHT. LOCALLY HEAVY RAINFALL ALONG THE BOUNDARY MAY LEAD  
TO A THREAT FOR FLASH FLOODING AND THUS WPC HAS PLACED MUCH OF  
THIS REGION IN A MARGINAL TO SLIGHT RISK FOR EXCESSIVE RAINFALL.  
THE WESTERN PORTION OF THIS BOUNDARY ACROSS THE SOUTHERN PLAINS IS  
FORECAST TO STALL ACROSS THE REGION WHICH WILL ELEVATE THE FLASH  
FLOOD AND HEAVY RAINFALL THREAT FOR THE NEXT COUPLE OF DAYS. WPC  
CONTINUES TO HIGHLIGHT PORTIONS OF THE SOUTHERN PLAINS TO THE  
SOUTHEASTERN STATES WITHIN A MARGINAL TO SLIGHT RISK FOR BOTH  
THURSDAY AND FRIDAY.  
 
MEANWHILE, A STRONG UPPER LEVEL RIDGE ACROSS THE WESTERN U.S. WILL  
BRING HOT AND DRY WEATHER AND POOR AIR QUALITY TO MUCH OF THE  
REGION DURING THE SHORT RANGE PERIOD (THROUGH FRIDAY). NEAR OR  
RECORD BREAKING TEMPERATURES IN THE 90S AND 100S ARE POSSIBLE  
THURSDAY AND FRIDAY, WHICH ARE AS MUCH AS 10 TO 20 DEGREES ABOVE  
NORMAL FOR THIS TIME OF THE YEAR. EXCESSIVE HEAT WARNINGS AND HEAT  
ADVISORIES ARE IN EFFECT FOR MUCH OF THE NORTHWEST AND INTO PARTS  
OF THE NORTHERN ROCKIES TO HIGH PLAINS, AS WELL FOR PARTS OF THE  
SOUTHWEST. THESE POOR CONDITIONS WILL ONLY EXACERBATE THE FIRE  
WEATHER CONCERNS OUT WEST, PARTICULARLY FOR THOSE AREAS ALREADY  
DEALING WITH WILDFIRES.  
 
MONSOONAL MOISTURE ROUNDING THE BASE OF A STRONG UPPER LEVEL RIDGE  
OVER THE WESTERN U.S. WILL KEEP MAINLY DIURNALLY DRIVEN SHOWERS  
AND THUNDERSTORMS IN THE FORECAST ACROSS THE SOUTHWEST THROUGH THE  
REST OF THE WORK WEEK. HEAVY RAINFALL AND LOCALIZED FLASH  
FLOODING, ESPECIALLY ALONG THE FAVORED TERRAIN IS POSSIBLE. WPC  
HAS PORTIONS OF THE FOUR CORNERS STATES AND THE SOUTHERN PLAINS IN  
A MARGINAL TO SLIGHT RISK THE NEXT COUPLE OF DAYS.  
 
SANTORELLI  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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