780  
FXUS01 KWBC 021954  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
353 PM EDT THU AUG 02 2018  
 
VALID 00Z FRI AUG 03 2018 - 00Z 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...  
 
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 EASTERN U.S.. SENSIBLE WEATHER WILL FEATURE  
WARM AND HUMID CONDITIONS, WITH CONTINUED CHANCES FOR RAIN AND  
THUNDERSTORMS 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.  
 
THE PERSISTENT UPPER LEVEL RIDGE THAT HAS BEEN IN PLACE ACROSS  
MUCH OF THE WESTERN U.S. IS FORECAST TO BREAK DOWN AS AN UPPER  
LEVEL TROUGH BEGINS IMPINGING ON THE PACIFIC NORTHWEST.  
TEMPERATURES TODAY WERE NOT QUITE AS WARM AS RECENT DAYS, BUT THE  
CONTINUED COMBINATION OF WINDS AND DRY AIR HAS LED TO RED FLAG  
WARNINGS AND FIRE WEATHER WATCHES ACROSS PORTIONS OF THE WESTERN  
U.S., INCLUDING PORTIONS OF THE INTERMOUNTAIN WEST, NORTHERN  
CALIFORNIA, AND MUCH OF MONTANA THROUGH FRIDAY. POOR AIR QUALITY  
WILL ALSO BE AN ISSUE FOR SOME OF THESE AREAS, AS WELL AS PORTIONS  
OF THE SOUTHWEST AND SOUTHERN PLAINS, ESPECIALLY NEAR ANY ACTIVE  
WILDFIRES.  
 
HAMRICK/WIX  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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