666  
FXUS01 KWBC 250757  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
356 AM EDT WED JUL 25 2018  
 
VALID 12Z WED JUL 25 2018 - 12Z FRI JUL 27 2018  
 
...HEAVY RAINS WILL CONTINUE TO RAISE FLOODING CONCERNS ACROSS  
PORTIONS OF THE MID-ATLANTIC AND NORTHEAST THROUGH WEDNESDAY...  
 
...STRONG TO SEVERE THUNDERSTORMS POSSIBLE FOR PORTIONS OF THE  
NORTHERN AND CENTRAL PLAINS TO THE UPPER MIDWEST...  
 
...DANGEROUS HEAT TO CONTINUE ACROSS THE SOUTHWEST AND PORTIONS OF  
THE WEST COAST...  
 
...RISK OF HEAVY RAINFALL LEADING TO FLASH FLOODING FOR THE  
CENTRAL/SOUTHERN ROCKIES AND CENTRAL HIGH PLAINS...  
 
DEEP MOISTURE WILL CONTINUE TO BE BROUGHT UP FROM THE SOUTHEAST  
INTO THE MID-ATLANTIC AND NORTHEAST TODAY. ONCE AGAIN, PERIODS OF  
SHOWERS AND THUNDERSTORMS THAT COULD PRODUCE HEAVY RAINFALL IS  
POSSIBLE. BECAUSE OF SATURATED SOIL CONDITIONS, FLASH FLOODING  
WILL REMAIN A CONCERN. A MODERATE RISK REMAINS ACROSS COASTAL  
NORTH CAROLINA NORTHWARD INTO THE THE MID-ATLANTIC AND ALONG THE  
SOUTHERN PORTIONS OF NEW YORK. THE UPPER LOW AND SURFACE COLD  
FRONT WILL FINALLY AID IN PUSHING PRECIPITATION OFFSHORE ON  
THURSDAY; HOWEVER, HEAVY RAINFALL IS EXPECTED FOR THE NORTHERN  
PORTIONS OF NEW ENGLAND. THEREFORE, A SLIGHT RISK OF FLASH  
FLOODING WILL BE POSSIBLE MOSTLY FOR PORTIONS OF MAINE.  
 
AN ORGANIZED AREA OF LOW PRESSURE IS EXPECTED TO PUSHING EAST FROM  
THE NORTHERN HIGH PLAINS INTO THE UPPER MIDWEST. BY THIS  
AFTERNOON, A COLD FRONT WILL STRETCH ACROSS THE UPPER MIDWEST  
WESTWARD INTO THE CENTRAL PLAINS AND HIGH PLAINS. SHOWERS AND  
THUNDERSTORMS ARE EXPECTED TO DEVELOP ALONG THIS BOUNDARY. SOME OF  
THESE STORMS COULD BE STRONG TO SEVERE--THUS, THE STORM PREDICTION  
CENTER HAS HIGHLIGHTED A SLIGHT RISK FOR THESE REGIONS. BY  
THURSDAY, THE SHOWERS AND THUNDERSTORMS ALONG THE COLD FRONT WILL  
MOVE TOWARD THE LOWER GREAT LAKES AND THE OHIO VALLEY. THERE IS A  
MARGINAL RISK OF SEVERE THUNDERSTORMS FOR PARTS OF THE UPPER AND  
LOWER GREAT LAKES. SHOWERS AND THUNDERSTORMS WILL CONTINUE THEIR  
EASTERLY TREK ALONG THE OHIO VALLEY AND INTO THE LOWER MISSISSIPPI  
VALLEY BY FRIDAY.  
 
DANGEROUS HEAT STILL REMAINS ACROSS THE SOUTHWEST AND PARTS OF THE  
WESTERN U.S. WHERE EXCESSIVE HEAT WARNINGS AND HEAT ADVISORIES  
REMAIN IN EFFECT THROUGH AT LEAST THURSDAY. TEMPERATURES BEGIN TO  
MODERATE BY FRIDAY--ALTHOUGH WILL STILL BE ABOVE THE CENTURY MARK  
ESPECIALLY FOR SOUTHERN CALIFORNIA AND THE SOUTHWEST. ELSEWHERE,  
SHOWERS AND THUNDERSTORMS ARE EXPECTED TODAY AND THURSDAY ACROSS  
PORTIONS OF THE CENTRAL AND SOUTHERN ROCKIES AND THE ADJACENT  
PLAINS. THESE THUNDERSTORMS COULD PRODUCE FLASH FLOODING  
ESPECIALLY OVER FAVORED TERRAIN AND RECENT BURN SCARS.  
 
REINHART  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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