837  
FXUS01 KWBC 011918  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
318 PM EDT WED AUG 01 2018  
 
VALID 00Z THU AUG 02 2018 - 00Z SAT AUG 04 2018  
   
..UNSETTLED WEATHER PATTERN CONTINUES ACROSS THE EASTERN U.S.
 
 
...THE HEAT WAVE IS GRADUALLY ABATING ACROSS THE WEST, THOUGH FIRE  
WEATHER CONCERNS REMAIN...  
 
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  
OUT FRONTAL BOUNDARY EXTENDING FROM TEXAS TO THE LOWER GREAT  
LAKES, COUPLED WITH A LARGE SCALE UPPER LEVEL TROUGH EXTENDING  
FROM THE GREAT LAKES TO THE MID SOUTH. THE RESPONSE TO THIS IN THE  
LOW LEVELS WILL BE DEEP MOISTURE SURGING NORTHWARD OVER THE  
EASTERN U.S., AIDED BY SOUTHERLY FLOW ON THE WESTERN EDGE OF THE  
BERMUDA HIGH. IT WILL BE WARM AND QUITE HUMID, WITH DAILY CHANCES  
FOR RAIN FROM THE GULF COAST TO NEW ENGLAND. EPISODES OF HEAVY  
RAIN ARE EXPECTED TO MATERIALIZE IN THIS TYPE OF WEATHER PATTERN,  
LEADING TO THE POTENTIAL FOR FLASH FLOODING. THE WEATHER  
PREDICTION CENTER HAS OUTLINED THE FLORIDA PANHANDLE AS BEING IN A  
MODERATE RISK FOR EXCESSIVE RAINFALL AND FLASH FLOODING THROUGH  
TONIGHT, WHILE THE SOUTHERN APPALACHIANS WILL SEE A MODERATE RISK  
DURING THE DAY ON THURSDAY. FURTHERMORE, A MARGINAL TO SLIGHT RISK  
OF EXCESSIVE RAINFALL AND FLASH FLOODING HAS BEEN OUTLINED FROM  
THE FLORIDA PANHANDLE NORTHWARD THROUGH THE APPALACHIANS AND INTO  
THE NORTHEAST FOR THE REMAINDER OF THE WORK WEEK. IN ADDITION TO  
THE RAINFALL CONCERNS, THE UNSTABLE ATMOSPHERE COULD LEAD TO  
STRONG TO SEVERE THUNDERSTORMS. THE STORM PREDICTION CENTER HAS  
OUTLINED PORTIONS OF GEORGIA AND SOUTH CAROLINA, AND WELL AS  
PORTIONS OF THE UPPER MID-ATLANTIC AS BEING IN A SLIGHT RISK FOR  
SEEING SEVERE THUNDERSTORMS THIS AFTERNOON AND INTO THE OVERNIGHT.  
 
PERSISTENT UPPER LEVEL RIDGING ACROSS THE WESTERN U.S. WILL LEAD  
TO MAINLY DRY CONDITIONS FOR THE PACIFIC NORTHWEST AND MUCH OF THE  
INTERMOUNTAIN WEST. TEMPERATURES ARE EXPECTED TO REMAIN ABOVE  
NORMAL FOR MUCH OF THIS REGION THROUGH TODAY, BUT WILL BEGIN  
IMPROVING FOR THURSDAY. HOWEVER, THE CONTINUED COMBINATION OF  
WINDS AND DRY AIR HAS LED TO RED FLAG WARNINGS ACROSS PORTIONS OF  
THE INTERMOUNTAIN WEST, THE NORTHERN ROCKIES, AND MUCH OF MONTANA  
THROUGH AT LEAST THURSDAY. POOR AIR QUALITY WILL ALSO BE AN ISSUE  
FOR SOME OF THESE AREAS, AS WELL AS ACROSS PORTIONS OF THE THE  
WESTERN AND SOUTHWESTERN U.S., AND INTO THE SOUTHERN PLAINS,  
ESPECIALLY NEAR ANY ACTIVE WILDFIRES.  
 
D. HAMRICK/WIX  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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