358  
FXUS01 KWBC 050801  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
401 AM EDT SUN AUG 05 2018  
 
VALID 12Z SUN AUG 05 2018 - 12Z TUE AUG 07 2018  
 
...UNSETTLED WEATHER EXPECTED ACROSS THE NORTH-CENTRAL U.S. FOR  
THE REST OF THIS WEEKEND AND INTO THE FIRST PART OF THE  
WORK-WEEK....  
 
...FIRE WEATHER CONCERNS CONTINUE ACROSS THE WESTERN U.S. THROUGH  
THIS EVENING...  
   
..EXCESSIVE HEAT TO RETURN TO THE SOUTHWEST
 
 
THE NORTHERN MID-ATLANTIC AND NORTHEAST WILL HAVE A REPRIEVE FROM  
THE WIDESPREAD, WET PATTERN IT'S BEEN IN OF LATE AS HIGH PRESSURE  
BUILDS OVER THE REGION. SCATTERED SHOWERS AND THUNDERSTORMS WILL  
BE POSSIBLE OVER PORTIONS OF THE SOUTHEAST AND SOUTHERN  
MID-ATLANTIC OVER THE NEXT COUPLE OF DAYS AS WARM, MOIST AIR  
STREAMS INTO THE REGION.  
 
SCATTERED TO WIDESPREAD SHOWERS AND THUNDERSTORMS WILL DEVELOP  
ACROSS THE CENTRAL U.S. AS A SERIES OF LOW PRESSURE SYSTEMS PASS  
THROUGH. ENOUGH INSTABILITY AND A MOISTURE WILL BE PRESENT TO  
INCREASE THE HEAVY RAIN POTENTIAL AND RAISE CONCERN FOR SEVERE  
WEATHER AND FLASH FLOODING, MAINLY ACROSS THE UPPER MISSISSIPPI  
VALLEY. THE STORM PREDICTION CENTER HAS OUTLINED MUCH OF THIS  
REGION IN A MARGINAL RISK FOR SEVERE THUNDERSTORM DEVELOPMENT  
THROUGH THE END OF THE WEEKEND; WITH A SLIGHT RISK SPANNING FROM  
EASTERN WYOMING TO MICHIGAN. THE WEATHER PREDICTION CENTER HAS  
ALSO OUTLINED A MARGINAL RISK OF EXCESSIVE RAINFALL AND POTENTIAL  
FLASH FLOODING ACROSS PORTIONS OF THE UPPER MISSISSIPPI VALLEY AND  
A SLIGHT RISK FROM NORTHEAST NEBRASKA TO SOUTHWEST WISCONSIN. THE  
THREAT FOR SEVERE WEATHER AND EXCESSIVE RAINFALL WILL SHIFT  
EASTWARD TOWARDS THE UPPER GREAT LAKES REGION BY MONDAY.  
 
PERSISTENT DRY AND WINDY CONDITIONS OVER THE WEST WILL HAVE  
MAINTAIN AN ELEVATED RISK FOR FIRE DANGER. PORTIONS OF THE PACIFIC  
NORTHWEST, THE GREAT BASIN, THE CENTRAL ROCKIES AND CALIFORNIA  
STILL HAVE RED FLAG WARNINGS IN EFFECT/WUX. EVEN WITH  
THUNDERSTORMS IN THE FORECAST FOR A PORTION OF THESE AREAS THIS  
AFTERNOON/EVENING, CONDITIONS ARE SO DRY THAT ANY LIGHTNING COULD  
SPARK NEW WILDFIRES. AIR QUALITY ALERTS ALSO REMAIN IN EFFECT FOR  
PORTIONS OF THE WESTERN AND SOUTHWESTERN U.S. AS ONGOING WILDFIRES  
CONTINUE TO INFUSE COPIOUS AMOUNTS OF SMOKE INTO THE AIR. AS A  
STRONG RIDGE BUILDS BACK ACROSS THE SOUTHWEST OVER THE COMING  
DAYS, EXPECT THE EXCESSIVE HEAT TO MAKE A RETURN. EXCESSIVE HEAT  
WATCHES ARE IN EFFECT ACROSS LARGE PORTIONS OF THE SOUTHWEST AND  
SOUTHERN CALIFORNIA FOR SUNDAY THROUGH WEDNESDAY AS TEMPERATURES  
ARE EXPECTED TO CLIMB TO WELL OVER 100 DEGREES.  
 
CAMPBELL  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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