662  
FXUS01 KWBC 010737  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
336 AM EDT SUN JUL 1 2018  
 
VALID 12Z SUN JUL 1 2018 - 12Z TUE JUL 3 2018  
 
...STORMY WEATHER FOR THE GREAT LAKES AND HEAT WAVE FOR THE  
EASTERN HALF OF THE NATION...  
 
A SLOW MOVING COLD FRONT CROSSING THE MIDWEST STATES ON SUNDAY  
WITH A SURFACE LOW ALONG IT WILL BE THE IMPETUS FOR HEAVY RAIN AND  
STRONG THUNDERSTORMS ACROSS PARTS OF ILLINOIS, WISCONSIN, AND  
MICHIGAN. THE PRIMARY THREATS WITH THESE STORMS WILL BE WIND AND  
LARGE HAIL, ALONG WITH HEAVY RAIN AND FREQUENT LIGHTNING. ACROSS  
THE GULF COAST REGION, A LOW PRESSURE TROUGH WILL ENHANCE SHOWERS  
AND STORMS FROM THE FLORIDA PANHANDLE TO LOUISIANA THROUGH MONDAY  
NIGHT, AND SOME OF THESE STORMS COULD PRODUCE LOCALLY HEAVY RAIN  
THAT MAY CAUSE SOME FLOODING ISSUES. DRY CONDITIONS ARE EXPECTED  
TO CONTINUE FOR MOST OF THE WESTERN U.S. FROM THE ROCKIES  
WESTWARD.  
 
THE OTHER THING MAKING WEATHER HEADLINES THIS WEEKEND AND GOING  
INTO EARLY NEXT WEEK IS THE ONGOING EXTENSIVE HEAT WAVE ACROSS  
MUCH OF THE PLAINS AND EXTENDING TO THE EAST COAST. AN IMPRESSIVE  
UPPER LEVEL RIDGE IS GROWING OVER THE EASTERN U.S. AND THIS IS  
LEADING TO WIDESPREAD SUBSIDENCE ALOFT, AND THUS MOSTLY SUNNY  
SKIES AND HOT CONDITIONS. TEMPERATURE ANOMALIES ON THE ORDER OF  
10 TO EVEN 20 DEGREES ABOVE NORMAL ARE EXPECTED THROUGH MONDAY,  
WITH THE POTENTIAL FOR NUMEROUS RECORD HIGH TEMPERATURES TO BE SET  
FROM THE GREAT LAKES TO NEW ENGLAND. NUMEROUS HEAT ADVISORIES AND  
EXCESSIVE HEAT WARNINGS ARE IN EFFECT FROM NEAR MEMPHIS TO  
MICHIGAN, AND ALSO FOR THE MID-ATLANTIC TO NORTHERN NEW ENGLAND.  
HIGH TEMPERATURES IN THE 90S TO NEAR 100 DEGREES, COMBINED WITH  
HIGH DEWPOINTS, IS EXPECTED RESULT IN HEAT INDICES OF 100 TO 110  
DEGREES FOR MANY AREAS. OVERNIGHT LOWS WILL ALSO BE QUITE SULTRY,  
ESPECIALLY IN URBAN AREAS WHERE READINGS COULD REMAIN ABOVE 75  
DEGREES ALL NIGHT.  
 
D. HAMRICK  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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