577  
AWUS85 KCYS 312222  
RWSWY  
 
WYZALL-011200  
 
REGIONAL WEATHER SUMMARY  
NATIONAL WEATHER SERVICE CHEYENNE WY  
421 PM MDT WED AUG 31 2011  
   
..MOSTLY SUNNY WITH A FEW SHOWERS OR THUNDERSTORMS
 
 
FOR SOUTHEAST WYOMING...  
A FEW SHOWERS AND THUNDERSTORMS DEVELOPED DURING THE AFTERNOON.  
GUSTY WESTERLY WINDS OF 15 TO 40 MILES AN HOUR AND DRY CONDITIONS  
PREVENTED MOST OF THE RAIN FROM REACHING THE GROUND.  
 
MORNING TEMPERATURES DIPPED INTO THE 50S TO LOWER 60S...WITH 40S AND  
50S IN THE HIGHER ELEVATIONS. AFTERNOON TEMPERATURES WARMED INTO THE  
80S TO LOWER 90S...WITH 70S AND 80S IN THE HIGHER ELEVATIONS.  
 
FOR NORTHEAST WYOMING...  
TEMPERATURES EARLY WEDNESDAY MORNING WERE MAINLY IN THE 50S. BY THIS  
AFTERNOON...TEMPERATURES HAD RISEN TO AROUND 90 DEGREES UNDER A  
PARTLY SUNNY SKY WITH SOUTHERLY WINDS AROUND 10 MPH. AN ISOLATED  
THUNDERSTORM ALSO OCCURRED IN THE EARLY AFTERNOON HOURS TO THE NORTH  
OF INTERSTATE 90.  
 
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.  
 

 
 
CYS/UNR/RIW  
 
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