173  
FXUS01 KWBC 281955  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
354 PM EDT SUN MAY 28 2017  
 
VALID 00Z MON MAY 29 2017 - 00Z WED MAY 31 2017  
 
...A LINGERING UPPER-LEVEL LOW WILL KEEP COOL AND SHOWERY  
CONDITIONS FROM THE NORTHERN PLAINS EASTWARD TO NEW ENGLAND...  
 
...SCATTERED SHOWERS AND THUNDERSTORMS CONTINUE ALONG THE EAST  
COAST AS WELL AS OVER THE DEEP SOUTH WHERE HEAVY DOWNPOURS ARE  
POSSIBLE...  
 
...HOT CONDITIONS EXPECTED FOR THE INTERIOR PACIFIC NORTHWEST AND  
THE DESERT SOUTHWEST...  
 
A LARGE UPPER-LEVEL LOW IS FORECAST TO DEEPEN AND MOVE SLOWLY  
EASTWARD ACROSS THE GREAT LAKES OVER THE NEXT COUPLE DAYS. THIS  
WILL KEEP TEMPERATURES BELOW NORMAL FROM MUCH OF THE GREAT PLAINS  
EASTWARD ACROSS THE MISSISSIPPI VALLEY, THE GREAT LAKES, AND INTO  
NEW ENGLAND. THE LARGE CYCLONIC CIRCULATION WILL ROTATE  
SMALL-SCALE DISTURBANCES INTO THE NORTHERN U.S., RESULTING IN  
OCCASIONAL SHOWERS AND ISOLATED THUNDERSTORMS, ESPECIALLY DURING  
THE AFTERNOON AND EARLY EVENING HOURS THROUGH TUESDAY. MEANWHILE,  
THE MAIN FRONT ASSOCIATED WITH THIS SYSTEM SHOULD GRADUALLY PUSH  
EASTWARD INTO THE EASTERN SEABOARD ON MEMORIAL DAY AND BECOMES  
NEARLY STATIONARY ACROSS THE MID-ATLANTIC ON TUESDAY. THIS WILL  
KEEP A GOOD CHANCE OF SHOWERS AND THUNDERSTORMS UP AND DOWN THE  
EAST COAST THROUGH TUESDAY. THE TRULY WARM AND HUMID AIR WILL  
REMAIN SOUTH OF THE FRONT OVER THE SOUTHEAST AND ACROSS THE DEEP  
SOUTH THROUGH TUESDAY, WHERE CLUSTERS OF THUNDERSTORMS CAN BE  
EXPECTED. SOME OF THESE THUNDERSTORMS COULD BE HEAVY ENOUGH TO  
RESULT IN FLASH FLOODING JUST INLAND FROM THE WESTERN GULF COAST  
THROUGH TONIGHT.  
 
MEANWHILE, A HIGH PRESSURE SYSTEM SIMILAR TO ONE IN THE COLD  
SEASONS IS FORECAST TO BUILD SOUTHWARD FROM WESTERN CANADA INTO  
THE NORTHERN HIGH PLAINS. THIS WILL SEND ANOTHER BATCH OF COOL  
CANADIAN AIR INTO THE AREA DURING THE NEXT COUPLE OF DAYS. IN  
CONTRAST, A BRIEF HEAT WAVE IS FORECAST FOR THE INTERIOR PACIFIC  
NORTHWEST THROUGH TUESDAY AS HIGH TEMPERATURES ARE EXPECTED TO  
REACH LOW TO MID 90'S OVER THE SNAKE RIVER VALLEY. MEANWHILE,  
TRIPLE-DIGIT HEAT IS EXPECTED FOR THE DESERT SOUTHWEST DUE TO THE  
INFLUENCE OF AN UPPER-LEVEL RIDGE.  
 
KONG  
 
GRAPHICS AVAILABLE AT WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_WBG.PHP  
 

 
 
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