387  
FLUS45 KRIW 300908  
HWORIW  
 
HAZARDOUS WEATHER OUTLOOK  
NATIONAL WEATHER SERVICE RIVERTON WY  
308 AM MDT WED JUL 30 2025  
 
WYZ001>020-022>030-311315-  
YELLOWSTONE NATIONAL PARK-ABSAROKA MOUNTAINS-CODY FOOTHILLS-  
NORTH BIGHORN BASIN-SOUTHWEST BIGHORN BASIN-SOUTHEAST BIGHORN BASIN-  
OWL CREEK AND BRIDGER MOUNTAINS-BIGHORN MOUNTAINS WEST-  
BIGHORN MOUNTAINS SOUTHEAST-NORTHEAST JOHNSON COUNTY-  
SOUTHEAST JOHNSON COUNTY-TETON AND GROS VENTRE MOUNTAINS-  
JACKSON HOLE-WIND RIVER MOUNTAINS WEST-WIND RIVER MOUNTAINS EAST-  
UPPER WIND RIVER BASIN-WIND RIVER BASIN-LANDER FOOTHILLS-  
GREEN MOUNTAINS AND RATTLESNAKE RANGE-  
NATRONA COUNTY LOWER ELEVATIONS-CASPER MOUNTAIN-STAR VALLEY-  
SALT RIVER AND WYOMING RANGES-UPPER GREEN RIVER BASIN FOOTHILLS-  
UPPER GREEN RIVER BASIN-SOUTH LINCOLN COUNTY-  
ROCK SPRINGS AND GREEN RIVER-FLAMING GORGE-EAST SWEETWATER COUNTY-  
308 AM MDT WED JUL 30 2025  
 
THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN AND CENTRAL WYOMING.  
   
DAY ONE  
TODAY AND TONIGHT.  
 
SHOWERS AND THUNDERSTORMS ARE EXPECTED TO DEVELOP THROUGHOUT THE DAY  
TODAY. BY THE AFTERNOON THESE SHOWERS AND THUNDERSTORMS WILL SPREAD  
EAST OF THE DIVIDE. DAYTIME HEATING AND ABOVE NORMAL MOISTURE WILL BE  
CAPABLE OF FUELING THE DEVELOPMENT OF A FEW STRONG TO SEVERE  
STORMS. THE MAIN HAZARDS AS A RESULT OF ANY STRONG TO SEVERE STORMS  
WILL BE LARGE HAIL, STRONG GUSTY WINDS, AND HEAVY DOWNPOURS. ISOLATED  
FLASH FLOODING WILL BE POSSIBLE WITH ANY SHOWERS OR STORMS. SHOWERS  
AND STORMS WILL START TO GRADUALLY DISSIPATE BY THE LATE EVENING  
INTO THE EARLY MORNING HOURS THURSDAY.  
   
DAYS TWO THROUGH SEVEN  
THURSDAY THROUGH TUESDAY.  
 
THURSDAY THROUGH MONDAY...DAILY CHANCES FOR AFTERNOON SHOWERS AND  
THUNDERSTORMS. THE BEST CHANCES WILL REMAIN OVER CENTRAL AND NORTHERN  
WY WITH LESSER CHANCES ELSEWHERE. PERIODIC HEAVY DOWNPOURS WILL BE  
POSSIBLE WITH ANY SHOWERS OR THUNDERSTORMS THAT DEVELOP.  
PRECIPITATION CHANCES WILL DECREASE THROUGH THE WEEKEND BECOMING MORE  
FOCUS ACROSS NORTHERN WY. LOW MIN RH AND BREEZY WINDS WILL DEVELOP  
ACROSS SOUTHERN WY. THIS MAY LEAD TO ELEVATED OR NEAR CRITICAL FIRE  
WEATHER CONDITIONS THROUGH THE WEEKEND.  
   
SPOTTER INFORMATION STATEMENT  
 
WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER  
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.  
 
 
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