169  
AWUS85 KRIW 312212  
RWSRIW  
 
REGIONAL WEATHER SUMMARY  
NATIONAL WEATHER SERVICE RIVERTON WY  
411 PM MDT WED AUG 31 2011  
 
FOR WESTERN AND CENTRAL WYOMING...  
 
EARLY MORNING SHOWERS AND THUNDERSTORMS MOVED TO THE NORTHEAST AND  
GAVE WAY TO MOSTLY CLEAR SKIES. MOSTLY SUNNY TO PARTLY CLOUDY SKIES  
THEN DEVELOPED IN THE AFTERNOON...WITH THUNDERSTORMS MOVING OVER THE  
WIND RIVER MOUNTAINS...NORTHWEST MOUNTAINS...NORTHERN BIG HORN  
BASIN...AND THE ROCK SPRINGS AREA. THE STORMS PRODUCED VERY HEAVY  
RAIN WITH PEA SIZE HAIL. STRONG WINDS OVER 20 MPH ALSO DEVELOPED BY  
NOON...WITH RELATIVE HUMIDITIES GETTING BELOW 15 PERCENT AT MANY  
LOCATIONS. THUS...FIRE DANGER CONDITIONS WERE HIGH THIS AFTERNOON.  
 
MORNING LOW TEMPERATURES WERE MILD FROM THE LOW 40S TO THE LOW 60S.  
AFTERNOON HIGHS WERE QUITE WARM WITHE 80S AND 90S IN THE LOWER  
ELEVATIONS...AND 60S AND 70S IN THE MOUNTAINS. AT 4 PM...WORLAND  
CAME IN AT 95 DEGREES...WITH GREYBULL AT 93...AND  
BUFFALO...RIVERTON...LANDER AT 91. WITH SHOWERS AROUND...ROCK  
SPRINGS DROPPED TO 80 DEGREES...AND BIG PINEY...PINEDALE...AND  
JACKSON WERE IN THE LOW 80S.  
 
 
 
MCDONALD  
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