143  
FXUS01 KWBC 311959  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
358 PM EDT TUE JUL 31 2018  
 
VALID 00Z WED AUG 01 2018 - 00Z FRI AUG 03 2018  
 
...SHOWERS AND THUNDERSTORMS WILL CONTINUE ACROSS THE EASTERN  
U.S....  
   
..EXCESSIVE HEAT CONTINUES ACROSS THE PACIFIC NORTHWEST
 
 
SHOWERS AND THUNDERSTORMS WILL BE SCATTERED TO NUMEROUS FROM THE  
GULF COAST NORTHEAST INTO NEW ENGLAND AND POINTS EASTWARD THROUGH  
THE THE MAJORITY OF THE WORK WEEK AS A COLD FRONT BECOMES STALLED  
ACROSS THIS REGION. THIS WILL INTERACT WITH AN UPPER LEVEL TROUGH  
WHICH WILL ALSO BE PARKED ACROSS THE SAME AREA, AND PROMOTE  
INSTABILITY AS WELL AS DEEP MOISTURE SURGING NORTHWARD OVER THE  
EASTERN U.S., AIDED BY EXPANSIVE SOUTHERLY FLOW ON THE WESTERN  
SIDE OF THE BERMUDA HIGH OVER THE ATLANTIC OCEAN. SENSIBLE WEATHER  
WILL FEATURE WARM AND HUMID CONDITIONS WITH DAILY CHANCES FOR RAIN  
AND THUNDERSTORMS. EPISODES OF HEAVY RAIN ARE ALSO EXPECTED IN  
THIS TYPE OF PATTERN, WITH THE WEATHER PREDICTION CENTER  
HIGHLIGHTING A SLIGHT CHANCE OF EXCESSIVE RAINFALL AND FLASH  
FLOODING ACROSS PORTIONS OF THE DEEP SOUTH AND CENTRAL  
APPALACHIANS TODAY, EXTENDING INTO THE NORTHERN APPALACHIANS FOR  
WEDNESDAY AND THURSDAY. THE STORM PREDICTION CENTER HAS ALSO  
ISSUED A SLIGHT RISK OF SEVERE THUNDERSTORMS FOR PORTIONS OF THE  
MID ATLANTIC AND NORTHEAST FOR WEDNESDAY.  
 
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 BE ABOVE NORMAL  
FOR MUCH OF THIS REGION, WITH HEAT ADVISORIES AND EXCESSIVE HEAT  
WARNINGS IN EFFECT ACROSS PARTS OF OREGON, WASHINGTON, AND IDAHO.  
POOR AIR QUALITY WILL ALSO BE AN ISSUE FOR PORTIONS OF THE WEST  
COAST, AS WELL AS PORTIONS OF THE SOUTHWEST AND SOUTHERN PLAINS,  
ESPECIALLY NEAR ANY ACTIVE WILDFIRES. FOR THE SOUTHWESTERN U.S.,  
MONSOONAL MOISTURE IS EXPECTED TO REMAIN ACROSS MUCH OF ARIZONA  
AND NEW MEXICO WITH SCATTERED THUNDERSTORMS DEVELOPING MAINLY  
DURING THE AFTERNOON AND EVENING HOURS.  
 
D. HAMRICK/WIX  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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