249  
FXUS01 KWBC 122003  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
403 PM EDT TUE JUN 12 2018  
 
VALID 00Z WED JUN 13 2018 - 00Z FRI JUN 15 2018  
 
...SEVERE THUNDERSTORMS ARE POSSIBLE TONIGHT FOR PARTS OF THE  
CENTRAL PLAINS AND UPPER MIDWEST, TOMORROW ACROSS THE NORTHEAST,  
AND THURSDAY IN THE NORTHERN PLAINS...  
 
...HEAVY RAIN AND FLASH FLOODING POSSIBLE FOR FOR PORTIONS OF THE  
CENTRAL PLAINS AND THE LOWER OHIO VALLEY TONIGHT...  
 
...HEAT WAVE TO CONTINUE FOR PORTIONS OF THE SOUTHWEST WITH A  
WARMING TREND EXPECTED ACROSS THE INTERMOUNTAIN WEST AND THE  
CENTRAL U.S....  
 
SCATTERED SHOWERS AND THUNDERSTORMS CAN BE EXPECTED ACROSS MUCH OF  
THE DEEP SOUTH, THE OHIO VALLEY, AND BACK INTO THE CENTRAL PLAINS  
TONIGHT AND INTO WEDNESDAY AHEAD OF A FRONTAL BOUNDARY AS IT  
PUSHES SLOWLY EASTWARD. THE BOUNDARY ITSELF SHOULD SERVE A FOCUS  
FOR HEAVIER RAINFALL AND STRONG TO SEVERE THUNDERSTORMS,  
PARTICULARLY ACROSS PORTIONS OF THE LOWER OHIO VALLEY AND THE  
CENTRAL PLAINS. WPC HAS SLIGHT RISKS FOR EXCESSIVE RAINFALL/FLASH  
FLOODING HIGHLIGHTED ACROSS THESE REGIONS THROUGH TONIGHT, AND THE  
STORM PREDICTION CENTER IS MONITORING PARTS OF THE TEXAS AND  
OKLAHOMA PANHANDLES AND SOUTHWEST KANSAS FOR THE DEVELOPMENT OF  
SEVERE THUNDERSTORMS.  
 
TO THE NORTH, A SHORTWAVE MOVING ACROSS THE UPPER MIDWEST AND THE  
GREAT LAKES THROUGH TOMORROW MAY SPARK A ROUND OF SEVERE  
THUNDERSTORMS ACROSS THE UPPER MIDWEST TONIGHT, AND AGAIN TOMORROW  
FOR PARTS OF THE INTERIOR NORTHEAST FROM NORTHERN WEST VIRGINIA TO  
UPSTATE NEW YORK. THE STORM PREDICTION CENTER HAS SLIGHT RISKS ON  
THEIR CONVECTIVE OUTLOOKS FOR BOTH OF THESE LOCATIONS. NUMEROUS  
SHOWERS AND STORMS ARE LIKELY BY WEDNESDAY AFTERNOON ACROSS MUCH  
OF THE NORTHEAST AND THE LOWER GREAT LAKES AHEAD OF THE ASSOCIATED  
COLD FRONT.  
 
PERSISTENT RIDGING IN THE UPPER LEVELS WILL KEEP SUMMER HEAT  
LOCKED IN ACROSS THE SOUTHWEST WITH AFTERNOON HIGHS IN THE 90S AND  
LOW 100S LIKELY THROUGH WEDNESDAY. THESE VALUES ARE AS MUCH AS 10  
DEGREES ABOVE NORMAL FOR THIS TIME OF THE YEAR, AND EXCESSIVE HEAT  
WARNINGS ARE IN EFFECT ACROSS PARTS OF SOUTHERN ARIZONA, EASTERN  
CALIFORNIA AND FAR SOUTHERN NEVADA. TEMPERATURES ARE EXPECTED TO  
MODERATE TO NEAR OR BELOW NORMAL BY THURSDAY AS THE UPPER RIDGING  
SHIFTS EASTWARD. ELSEWHERE, TEMPERATURES ACROSS THE CENTRAL U.S.  
AND INTERMOUNTAIN WEST WILL ALSO BE 10 TO 15 DEGREES ABOVE NORMAL  
AHEAD OF A FRONTAL BOUNDARY ENTERING THE PACIFIC NORTHWEST BY  
WEDNESDAY.  
 
SANTORELLI  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.

The Nexlab HPC Page Main Text Page