292  
FXUS01 KWBC 041920  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
319 PM EDT WED JUL 04 2018  
 
VALID 00Z THU JUL 05 2018 - 00Z SAT JUL 07 2018  
 
...SOME SEVERE WEATHER AND LOCALLY HEAVY RAINFALL IS EXPECTED  
ACROSS PORTIONS OF THE CENTRAL PLAINS, MIDWEST AND NORTHEAST  
THROUGH THE END OF THE WEEK...  
 
...A GRADUAL BREAK IN THE HEATWAVE IS EXPECTED ACROSS MOST OF THE  
MIDWEST AND EASTERN U.S. OVER THE NEXT COUPLE OF DAYS...  
   
..VERY HOT TEMPERATURES ARE EXPECTED ACROSS THE SOUTHWEST U.S
 
 
EXPECT AREAS OF SHOWERS AND THUNDERSTORMS TO CONTINUE ALONG A COLD  
FRONT AS IT PRESSES EASTWARD ACROSS AREAS OF THE CENTRAL PLAINS  
AND MIDWEST TONIGHT AND THURSDAY, AND GRADUALLY GETTING INTO AREAS  
OF THE OHIO VALLEY, MID-ATLANTIC AND NORTHEAST THURSDAY NIGHT AND  
FRIDAY. SOME SEVERE WEATHER WILL BE POSSIBLE, ESPECIALLY  
OVERNIGHT, FOR PARTS OF THE CENTRAL PLAINS AND UPPER MIDWEST, AND  
HEAVY RAINFALL WILL ALSO LOCALLY BE A CONCERN WITH SOME POTENTIAL  
FOR FLASH FLOODING POSSIBLE. BY FRIDAY, MUCH OF THE HEAVY RAINFALL  
THREAT WILL BE FOCUSED ACROSS THE MID-ATLANTIC REGION AS THE  
AFOREMENTIONED COLD FRONT ARRIVES AND BEGINS CROSSING THE REGION.  
THIS COLD FRONT WILL ALSO BE INSTRUMENTAL IN BREAKING THE HEATWAVE  
THAT HAS BEEN IMPACTING THE MIDWEST AND EASTERN U.S. OVER THE LAST  
SEVERAL DAYS.  
 
MEANWHILE, PLENTY OF MOISTURE IS EXPECTED TO REMAIN IN PLACE  
ACROSS A LARGE AREA OF THE GULF COAST STATES FOR THE REMAINDER OF  
THE WEEK WHICH WILL FOSTER NUMEROUS SHOWERS AND THUNDERSTORMS  
DURING THE AFTERNOON AND EVENING HOURS. MORE ORGANIZED HEAVY  
RAINFALL WILL BE EXPECTED IN PARTICULAR ACROSS AREAS OF  
SOUTH-CENTRAL TEXAS TONIGHT WHERE A WEAK AREA OF LOW PRESSURE WILL  
BE CONCENTRATING VERY HEAVY AND SLOW-MOVING POCKETS OF SHOWERS AND  
THUNDERSTORMS WHICH WILL BE CAPABLE OF CAUSING FLASH FLOODING.  
 
ACROSS THE WESTERN U.S., THE STORY WILL BE RISING TEMPERATURES AND  
ESPECIALLY ACROSS THE DESERT SOUTHWEST OVER THE NEXT COUPLE OF  
DAYS. HIGH TEMPERATURES ARE EXPECTED TO REACH AS HOT AS 110 TO 115  
OVER PORTIONS OF SOUTHERN CALIFORNIA, SOUTHERN NEVADA AND ARIZONA  
AS A RIDGE OF HIGH PRESSURE ADVANCES WEST FROM THE SOUTHERN PLAINS  
AND STRENGTHENS OVER THE FOUR CORNERS REGION. THIS WILL INCREASE  
THE POTENTIAL FOR DANGEROUS WILDFIRE CONDITIONS GIVEN VERY LOW  
RELATIVE HUMIDITIES. MOST OF THE WEST SHOULD GENERALLY STAY DRY  
GOING INTO THE EARLY PART OF THE WEEKEND, BUT THERE WILL GRADUALLY  
BE SOME MONSOONAL MOISTURE AT LEAST ATTEMPTING TO LIFT UP ACROSS  
THE FOUR CORNERS REGION BY SATURDAY WHICH WILL FOSTER SOME WIDELY  
SCATTERED SHOWERS AND THUNDERSTORMS. MUCH OF THIS RAINFALL THREAT  
WILL BE CONFINED TO THE SOUTHERN ROCKIES.  
 
ORRISON  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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