529  
FXUS01 KWBC 030800  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
359 AM EDT FRI AUG 03 2018  
 
VALID 12Z FRI AUG 03 2018 - 12Z SUN AUG 05 2018  
   
..UNSETTLED WEATHER PATTERN CONTINUES ACROSS THE EASTERN U.S.
 
 
...THE HEAT WAVE IS GRADUALLY ABATING ACROSS THE WEST, THOUGH FIRE  
WEATHER CONCERNS REMAIN...  
 
MUCH OF THE THE WESTERN STATES WILL CONTINUE TO BE HOT AND MOSTLY  
DRY OVER THE NEXT FEW DAYS, ALTHOUGH TEMPERATURES WILL BE STEADILY  
MODERATING BY THE WEEKEND. LOW HUMIDITY ALONG WITH GUSTY WIND WILL  
MAINTAIN AN ELEVATED THREAT FOR THE SPREAD OF WILDFIRES ACROSS  
PORTIONS OF THE GREAT BASIN/SOUTHWEST AND THE INTERMOUNTAIN WEST.  
NUMEROUS RED FLAG WARNINGS AND FIRE WEATHER WATCHES ARE IN EFFECT.  
ADDITIONALLY, SEVERAL LOCATIONS ACROSS SOUTHERN OREGON, SOUTHERN  
CALIFORNIA, SOUTHERN ARIZONA AND THE SOUTHERN PLAINS HAVE POOR AIR  
QUALITY IN PART FROM WILDFIRE SMOKE.  
 
AN INCREASE IN PRECIPITATION IS FORECAST FOR THE PACIFIC NORTHWEST  
AS AN UPPER-LEVEL TROUGH APPROACHES THE COAST AND BEGINS TO  
BREAKDOWN THE RIDGE. SHOWERS AND THUNDERSTORMS ARE EXPECTED TO  
DEVELOP ACROSS PORTIONS OF THE INTERMOUNTAIN WEST,  
CENTRAL/SOUTHERN ROCKIES AND THE ADJACENT HIGH PLAINS AS A FRONTAL  
SYSTEM EXITS INTO THE NORTHERN/CENTRAL PLAINS. SOME OF THESE  
STORMS MAY BECOME SEVERE THIS AFTERNOON NEAR THE DAKOTA/MINNESOTA  
BORDER.  
 
UNSETTLED WEATHER WILL CONTINUE TO BE THE CASE FOR MUCH OF THE  
EASTERN U.S. THROUGH THE END OF THE WORKWEEK, OWING TO A STALLED  
FRONTAL BOUNDARY EXTENDING FROM TEXAS TO THE LOWER GREAT LAKES.  
THIS FRONT WILL CONTINUE TO WEAKEN AND EVENTUALLY DISSIPATE BY  
FRIDAY. IN THE MEANTIME, THE BOUNDARY WILL COUPLE WITH A LARGE  
SCALE UPPER LEVEL TROUGH EXTENDING FROM THE GREAT LAKES TO THE MID  
SOUTH, AS WELL AS DEEP SOUTHERLY FLOW OFF THE WESTERN EDGE OF THE  
BERMUDA HIGH IN THE ATLANTIC OCEAN, LEADING TO A STRONG SURGE OF  
MOISTURE ACROSS THE EAST- RESULTING IN WARM AND HUMID CONDITIONS  
WITH RAIN AND THUNDERSTORMS POSSIBLE FROM THE GULF COAST TO NEW  
ENGLAND. SOME OF THESE RAIN SHOWERS AND THUNDERSTORMS COULD BE  
QUITE HEAVY, AND TRACK OVER MANY OF THE SAME LOCATIONS, LEADING TO  
THE POTENTIAL FOR FLASH FLOODING. FLASH FLOOD WATCHES ARE IN  
EFFECT ACROSS MUCH OF THE APPALACHIAN REGION.  
 
CAMPBELL/HAMRICK  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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