707  
FXUS01 KWBC 070802  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
401 AM EDT TUE AUG 07 2018  
 
VALID 12Z TUE AUG 07 2018 - 12Z THU AUG 09 2018  
 
...UNSETTLED WEATHER EXPECTED TO SHIFT ACROSS THE SOUTH-CENTRAL  
AND EASTERN U.S. THROUGH THE WORK-WEEK...  
 
...EXCESSIVE HEAT AND AIR QUALITY CONCERNS WILL PERSIST ACROSS  
PORTIONS OF THE WEST, SOUTHWEST, AND NORTHEAST...  
   
..RED FLAG WARNINGS CONTINUE ACROSS SOUTHERN CALIFORNIA
 
 
...HURRICANE JOHN WILL TRACK NORTHWEST NEAR THE BAJA CALIFORNIA  
PENINSULA...  
 
A COLD FRONT WILL PASS THROUGH THE GREAT LAKES REGION AND INTO THE  
NORTHEAST OVER THE NEXT FEW DAYS WHILE ACTING AS A FOCUS FOR  
SCATTERED TO WIDESPREAD SHOWER AND THUNDERSTORM DEVELOP. THE  
TRAILING END OF THE FRONT WILL SLOW CONSIDERABLY ACROSS THE  
CENTRAL U.S. SLOW STORM MOTION ALONG THIS PORTION OF THE FRONT  
WILL INCREASE THE LIKELIHOOD OF HEAVY RAINFALL AND FLASH FLOODING  
RISK. WPC HAS HIGHLIGHTED THIS REGION AS HAVING A  
MARGINAL-TO-SLIGHT RISK FOR EXCESSIVE RAINFALL. ADDITIONALLY, THE  
STORM PREDICTION CENTER HAS ISSUED A SLIGHT RISK FOR SEVERE STORMS  
FOR PORTIONS OF THE SOUTHERN/CENTRAL ROCKIES.  
 
A RIDGE OVER THE SOUTHWEST, EXTENDING NORTHWARD OVER MUCH OF THE  
WEST, WILL KEEP HOT AND MOSTLY DRY CONDITIONS IN PLACE FOR THE  
NEXT THE FEW DAYS. THIS IS RESULTING IN RISING TEMPERATURES AND  
EXCESSIVE HEAT ACROSS MUCH OF THIS REGION. EXCESSIVE HEAT WARNINGS  
ARE IN EFFECT FOR MUCH OF THE SOUTHWEST AND SOUTHERN CALIFORNIA.  
EXCESSIVE HEAT WATCHES ARE ALSO IN EFFECT FOR THE NORTHERN GREAT  
BASIN. SEVERAL LOCATIONS COULD OBSERVE DAILY MAXIMUM TEMPERATURE  
READING EXCEEDING 100 DEGREES. THESE HOT AND DRY CONDITIONS WILL  
MAINTAIN AN ELEVATED THREAT FOR THE SPREAD OF WILDFIRES. RED FLAG  
WARNINGS ALONG WITH AIR QUALITY ALERTS ARE STILL IN PLACE ACROSS  
SOUTHERN CALIFORNIA, NEVADA AND ARIZONA. AIR QUALITY ALERTS ARE  
ALSO IN EFFECT FOR PARTS OF WASHINGTON AND OREGON. AN STEADY  
INCREASE IN MOISTURE IS EXPECTED FOR MEXICO AND THE DESERT  
SOUTHWEST AS HURRICANE JOHN TRACKS NORTH AND WEST IN THE PACIFIC  
OCEAN. SHOWERS AND THUNDERSTORMS MAY BE POSSIBLE FOR THE SOUTHWEST  
BY THE END OF THE WEEK.  
 
ON THE EAST COAST, STRONG SOUTHERLY FLOW WILL PUMP HOT AND HUMID  
AIR INLAND. THIS WILL RESULT IN ABOVE NORMAL TEMPERATURES AND EVEN  
HIGHER HEAT INDEX VALUES, ESPECIALLY ACROSS THE NORTHEAST. HEAT  
ADVISORIES AND AIR QUALITY ALERTS FOR EXCESSIVE OZONE  
CONCENTRATIONS ARE IN EFFECT ACROSS MUCH OF THE NORTHEAST AND THE  
NORTHERN EXTENT OF THE MID-ATLANTIC REGION THROUGH TUESDAY. A COLD  
FRONT WILL PASS THROUGH AFTER THIS POINT AND HELP TO COOL THINGS  
DOWN.  
 
CAMPBELL  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.

The Nexlab HPC Page Main Text Page