495  
FXUS01 KWBC 211845  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
245 PM EDT SUN JUL 21 2019  
 
VALID 00Z MON JUL 22 2019 - 00Z WED JUL 24 2019  
 
...MODERATE RISK FOR FLASH FLOODING ACROSS PARTS OF THE NORTHERN  
MID-ATLANTIC ON MONDAY...  
 
...SHOWERS AND THUNDERSTORMS LIKELY ALONG A COLD FRONT FROM THE  
NORTHEAST TO THE SOUTHERN PLAINS...  
 
...LOCALLY HEAVY RAINFALL POSSIBLE ALONG AND EAST OF THE CENTRAL  
AND SOUTHERN ROCKIES MONDAY AND TUESDAY...  
 
THE DANGEROUS HEAT WAVE WHICH ENVELOPED MUCH OF THE MIDWEST TO THE  
EAST COAST THIS WEEKEND SHOULD FINALLY BREAK BY MONDAY AS A COLD  
FRONT DROPS SOUTHWARD. SHOWERS AND THUNDERSTORMS WILL ACCOMPANY  
THIS BOUNDARY FROM THE NORTHEAST TO THE SOUTHERN PLAINS WITH HEAVY  
TO EXCESSIVE RAINFALL AND SEVERE WEATHER POSSIBLE. THE BOUNDARY  
WILL BE SLOW MOVING, ESPECIALLY ACROSS PARTS OF THE NORTHERN  
MID-ATLANTIC, WHICH WILL INCREASE THE THREAT FOR FLASH FLOODING.  
WPC HIGHLIGHTS PARTS OF THIS REGION, FROM ROUGHLY NORTHEAST  
VIRGINIA TO NEW YORK CITY, WITHIN A MODERATE RISK ON MONDAY. A  
SLIGHT RISK EXTENDS INTO SOUTHERN NEW ENGLAND AND BACK TO THE  
TENNESSEE VALLEY. MORE WIDESPREAD SHOWERS AND THUNDERSTORMS SHOULD  
PUSH INTO PARTS OF THE SOUTHEAST AND GULF COAST STATES BY TUESDAY.  
THIS BOUNDARY WILL USHER IN A MUCH APPRECIATED COOLER AIRMASS WITH  
MOST OF THE COUNTRY EAST OF THE ROCKIES FEELING NEAR OR BELOW  
NORMAL BY TUESDAY.  
 
ELSEWHERE, DAILY AND MAINLY DIURNALLY DRIVEN SHOWERS AND  
THUNDERSTORMS WILL DEVELOP ACROSS PARTS OF THE SOUTHWEST AND ALONG  
AND EAST OF THE CENTRAL AND SOUTHERN ROCKIES WITH LOCALLY HEAVY TO  
EXCESSIVE RAINFALL POSSIBLE. A COLD FRONT MOVING INTO THE PACIFIC  
NORTHWEST ON TUESDAY SHOULD BRING INCREASED CHANCES FOR RAIN  
ACROSS THE NORTHWEST AND NORTHERN ROCKIES. AHEAD OF THIS, UPPER  
LEVEL RIDGING WILL BUILD ACROSS MOST OF THE INTERIOR WEST, KEEPING  
TEMPERATURES ABOVE NORMAL FOR THIS TIME OF THE YEAR.  
 
SANTORELLI  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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