233  
FXUS01 KWBC 162001  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
401 PM EDT MON JUL 16 2018  
 
VALID 00Z TUE JUL 17 2018 - 00Z THU JUL 19 2018  
 
...SEVERE THUNDERSTORMS AND FLASH FLOODING POSSIBLE ACROSS PARTS  
OF THE NORTHEAST, THE DEEP SOUTH, AND THE PLAINS...  
 
...MONSOONAL MOISTURE TO CONTINUE ACROSS THE SOUTHWEST WITH HEAVY  
TO EXCESSIVE RAINFALL POSSIBLE  
 
...WELL ABOVE NORMAL TEMPERATURES TO CONTINUE THROUGH TUESDAY  
ACROSS PARTS OF THE WESTERN US...  
 
SHOWERS AND THUNDERSTORMS WILL CONTINUE ALONG AND AHEAD OF A  
FRONTAL BOUNDARY AS IT SHIFTS EASTWARD FROM THE OHIO VALLEY INTO  
THE EASTERN U.S. BY TOMORROW. SOME OF THESE STORMS MAY BE CAPABLE  
OF PRODUCING SEVERE WEATHER AND/OR HEAVY TO EXCESSIVE RAINFALL,  
PARTICULARLY ACROSS PORTIONS OF THE NORTHEAST AND THE DEEP SOUTH.  
SPC HAS HIGHLIGHTED PORTIONS OF THE NORTHEAST WITHIN A MARGINAL TO  
SLIGHT RISK FOR SEVERE THUNDERSTORMS, WHILE WPC HAS MUCH OF THE  
AREA ALONG THE FRONT FROM THE NORTHEAST TO THE DEEP SOUTH WITHIN A  
MARGINAL TO SLIGHT RISK FOR EXCESSIVE RAINFALL. OUT WEST, MOISTURE  
ASSOCIATED WITH UPPER LEVEL ENERGY MOVING THROUGH THE NORTHERN  
ROCKIES THIS EVENING INTO THE NORTHERN PLAINS TOMORROW WILL  
INTERACT WITH A SURFACE BOUNDARY DRAPED ACROSS THE HIGH PLAINS TO  
PRODUCE SHOWERS AND THUNDERSTORMS FROM THE NORTHERN HIGH PLAINS TO  
THE CENTRAL PLAINS. AGAIN, BOTH SPC AND WPC HAVE MARGINAL TO  
SLIGHT RISKS FOR THIS REGION FOR SEVERE WEATHER AND FLASH  
FLOODING, RESPECTIVELY, THIS EVENING AS WELL AS ON TUESDAY. IN THE  
SOUTHWEST, EXPECT MONSOONAL MOISTURE TO CONTINUE THROUGH THE SHORT  
RANGE PERIOD RESULTING IN MAINLY DIURNALLY DRIVEN SHOWERS AND  
STORMS, WITH HEAVY TO EXCESSIVE RAINFALL POSSIBLE. SEE THE  
GRAPHICS AND DISCUSSIONS FROM THESE TWO CENTERS FOR ADDITIONAL  
DETAILS ON THE SEVERE WEATHER AND HEAVY RAINFALL RISKS ACROSS THE  
COUNTRY.  
 
TEMPERATURE WISE, PORTIONS OF THE WESTERN U.S. WILL HAVE TO ENDURE  
ANOTHER DAY OF SWELTERING HEAT, WITH AFTERNOON HIGHS APPROACHING  
OR EXCEEDING 100 DEGREES POSSIBLE. THIS IS AS MUCH AS 10 TO 15  
DEGREES ABOVE NORMAL WITH MANY LOCATIONS FROM NORTHERN CALIFORNIA  
TO CENTRAL WASHINGTON UNDER HEAT ADVISORIES OR EXCESSIVE HEAT  
WARNINGS. CONDITIONS ARE ALSO DRY OUT WEST WHICH INCREASES FIRE  
WEATHER CONCERNS. A FEW RED FLAG WARNINGS ARE ALSO IN EFFECT  
ACROSS NORTHEAST NEVADA.  
 
SANTORELLI  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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