065  
FXUS01 KWBC 062000  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
359 PM EDT MON AUG 06 2018  
 
VALID 00Z TUE AUG 07 2018 - 00Z THU AUG 09 2018  
 
...UNSETTLED WEATHER EXPECTED TO SHIFT ACROSS THE SOUTH-CENTRAL  
AND EASTERN U.S. THROUGH THE WORK-WEEK...  
 
INTO THE CENTRAL/SOUTHERN PLAINS, MIDDLE MISSISSIPPI VALLEY, AND  
GREAT LAKES REGION MIDWEST AND GREAT LAKES REGION AS WE HEAD INTO  
THE WORK-WEEK....  
 
...EXCESSIVE HEAT AND AIR QUALITY CONCERNS ACROSS PORTIONS OF THE  
WEST, SOUTHWEST, AND NORTHEAST...  
   
..RED FLAG WARNINGS CONTINUE ACROSS SOUTHERN CALIFORNIA
 
 
A ELONGATED COLD FRONT AND A SERIES OF LOW PRESSURE SYSTEMS ARE  
CURRENTLY STRETCHING FROM THE SOUTHERN/CENTRAL ROCKIES, NORTHEAST  
THROUGH THE MID-MISSISSIPPI VALLEY AND INTO THE GREAT LAKES  
REGION. THIS SYSTEM IS EXPECTED TO CONTINUE TO SHIFT SOUTHEAST  
OVER THE COMING DAYS. ALONG AND NEAR THIS SYSTEM, SHOWERS AND  
THUNDERSTORMS ARE LIKELY. THE STORM PREDICTION CENTER HAS OUTLINED  
A MARGINAL RISK OF SEVERE STORMS THROUGH TONIGHT ALONG THIS LINE.  
A SLIGHT RISK IS ALSO POSSIBLE MAINLY ACROSS THE SOUTHERN EXTENT  
OF THE UPPER GREAT LAKES AND INTO NORTH-CENTRAL ILLINOIS. THE  
WEATHER PREDICTION CENTER HAS ALSO OUTLINED A SLIGHT RISK OF  
EXCESSIVE RAINFALL AND FLASH FLOODING ACROSS MUCH OF THIS SAME  
AREAS, AS WELL AS AN AREA ENCOMPASSING SOUTHEAST NEBRASKA,  
NORTHWEST MISSOURI, AND FAR SOUTHWEST IOWA. A MARGINAL RISK OF  
EXCESSIVE RAINFALL IS IN PLACE ELSEWHERE NEAR THE FRONTAL ZONE. AS  
THE FRONTAL ZONE CONTINUES TO PUSH SOUTHEAST, SO TOO WILL THE  
AREAS OF CONCERN FOR SEVERE THUNDERSTORMS AND EXCESSIVE RAINFALL.  
 
A STRONG RIDGE OF HIGH PRESSURE HAS SETTLED OVER THE SOUTHWEST AND  
WILL REMAIN IN PLACE FOR THE NEXT SEVERAL DAYS, EXTENDING  
NORTHWARD ACROSS MUCH OF THE WESTERN U.S. 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. AFTERNOON HIGH TEMPERATURES WILL  
EXCEED 100 DEGREES FOR MANY LOCATIONS WITHIN THESE WATCHES AND  
WARNINGS. THE HEAT CONTINUES TO FUEL WILDFIRE CONCERNS ACROSS THE  
WESTERN U.S. AS WELL, WITH RED FLAG WARNINGS STILL IN PLACE ACROSS  
SOUTHERN CALIFORNIA, AND AIR QUALITY ALERTS FOR SMOKE IN PLACE  
ACROSS LARGE PORTIONS OF CALIFORNIA AND OREGON.  
 
MEANWHILE, STRONG SOUTHERLY FLOW WILL PUMP HOT AND HUMID AIR INTO  
THE NORTHEAST, RESULTING IN ABOVE NORMAL TEMPERATURES AND EVEN  
HIGHER HEAT INDEX VALUES. 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.  
 
WIX  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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