623  
FXUS01 KWBC 132008  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
408 PM EDT FRI JUL 13 2018  
 
VALID 00Z SAT JUL 14 2018 - 00Z MON JUL 16 2018  
 
...HEAVY RAIN POSSIBLE ACROSS PORTIONS OF THE CENTRAL PLAINS INTO  
THE UPPER MISSISSIPPI VALLEY...  
   
..SHOWERS AND THUNDERSTORMS EXPECTED ACROSS THE SOUTHEAST
 
 
...HEAVY RAIN POSSIBLE OVER THE DESERT SOUTHWEST AND INTO THE  
ROCKIES...  
 
...EXCESSIVE HEAT EXPECTED FOR THE PACIFIC NORTHWEST AND NORTHERN  
CALIFORNIA...  
 
A SLOW MOVING FRONT WILL STRETCH FROM THE GREAT LAKES TO THE  
PLAINS WILL BE THE FOCAL POINT FOR SHOWERS AND THUNDERSTORMS OVER  
THE NEXT FEW DAYS. AMPLE MOISTURE FROM THE GULF OF MEXICO WILL BE  
TRANSPORTED TO THIS AREA AND FUEL CONVECTIVE ACTIVITY PARTICULARLY  
IN THE AFTERNOON AND EVENING THROUGH THE WEEKEND. THERE IS A  
SLIGHT RISK OF FLASH FLOODING FROM THE UPPER MIDWEST TO THE  
CENTRAL PLAINS THROUGH SATURDAY MORNING. ADDITIONALLY, A SLIGHT  
RISK OF SEVERE THUNDERSTORMS IS ALSO POSSIBLE. BY SATURDAY, THE  
RISK OF FLASH FLOODING AND SEVERE THUNDERSTORMS DECREASES;  
HOWEVER, THERE WILL STILL BE A MARGINAL RISK OF FLASH FLOODING IN  
THE MIDDLE MISSISSIPPI VALLEY AND OHIO VALLEY.  
 
A QUASI-STATIONARY FRONT WILL CONTINUE TO BE DRAPED ALONG THE  
CAROLINAS THROUGH THE WEEKEND. WITH PLENTY OF MOISTURE ON TAP AND  
INSTABILITY FROM DAYTIME HEATING, SHOWERS AND THUNDERSTORMS WILL  
INCREASE THROUGHOUT THE DAY ACROSS THE SOUTHEAST WITH THE FRONT  
AIDING IN FUELING THESE THUNDERSTORMS. A MARGINAL RISK OF FLASH  
FLOODING WILL BE POSSIBLE THROUGH SUNDAY.  
 
SCATTERED THUNDERSTORMS THAT HAVE LOOMED OVER THE DESERT SOUTHWEST  
EACH AFTERNOON THE LAST FEW DAYS IS EXPECTED TO CONTINUE THIS  
WEEKEND. MONSOONAL MOISTURE AND DAYTIME HEATING WILL LEAD TO  
CONVECTION IN THE AFTERNOON AND EVENING. BY SUNDAY, THIS ACTIVITY  
WILL PERSIST ACROSS THE SOUTHWEST AND WILL ALSO INCREASE ACROSS  
THE SOUTHERN AND CENTRAL ROCKIES. LOCALIZED FLASH FLOODING WILL BE  
A CONCERN DUE TO TERRAIN AND ESPECIALLY IN FLOOD PRONE AREAS.  
 
PARTS OF THE PACIFIC NORTHWEST AND NORTHERN CALIFORNIA CAN EXPECT  
HIGH TEMPERATURES IN THE UPPER 90S AND OVER 100 OVER THE NEXT FEW  
DAYS. WITH THE HOT AND DRY CONDITIONS IN PLACE, FIRE WEATHER WILL  
BE A CONCERN ESPECIALLY TODAY AND SATURDAY. RED FLAG WARNINGS ARE  
IN PLACE OVER PARTS OF THESE REGIONS ALONG WITH HEAT ADVISORIES  
AND EXCESSIVE HEAT WATCHES/WARNINGS.  
 
REINHART  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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