337
WWUS75 KRIW 010739
NPWRIW
URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE RIVERTON WY
139 AM MDT SAT AUG 1 2026
WYZ003>006-010-011-013-016>020-023-025>030-020000-
/O.CON.KRIW.HT.Y.0002.260801T1800Z-260803T0400Z/
CODY FOOTHILLS-NORTH BIGHORN BASIN-SOUTHWEST BIGHORN BASIN-
SOUTHEAST BIGHORN BASIN-NORTHEAST JOHNSON COUNTY-SOUTHEAST
JOHNSON COUNTY-JACKSON HOLE-UPPER WIND RIVER BASIN-WIND RIVER
BASIN-LANDER FOOTHILLS-GREEN MOUNTAINS AND RATTLESNAKE RANGE-
NATRONA COUNTY LOWER ELEVATIONS-STAR VALLEY-UPPER GREEN RIVER
BASIN FOOTHILLS-UPPER GREEN RIVER BASIN-SOUTH LINCOLN COUNTY-ROCK
SPRINGS AND GREEN RIVER-FLAMING GORGE-EAST SWEETWATER COUNTY-
INCLUDING THE CITIES OF POWELL, THERMOPOLIS, RIVERTON, KEMMERER,
BUFFALO, ALPINE, STAR VALLEY RANCH, LA BARGE, BASIN, JACKSON, AFTON,
COKEVILLE, BIG PINEY, GREEN RIVER, KAYCEE, MEETEETSE, GREYBULL,
WORLAND, CASPER, TEN SLEEP, LOVELL, LANDER, FARSON, THAYNE, SHELL,
CODY, SHOSHONI, DUBOIS, JEFFREY CITY, PINEDALE, CLARK, ROCK SPRINGS,
AND WAMSUTTER
139 AM MDT SAT AUG 1 2026
...HEAT ADVISORY REMAINS IN EFFECT FROM NOON TODAY TO 10 PM MDT
SUNDAY...
* WHAT...VERY HOT TEMPERATURES EXPECTED THIS WEEKEND. HIGHS FROM 98
TO 105 BELOW 5500 FEET, 90 TO 98 ABOVE 5500 FEET.
* WHERE...PORTIONS OF CENTRAL, NORTH CENTRAL, NORTHWEST, SOUTH
CENTRAL, SOUTHWEST, AND WEST CENTRAL WYOMING.
* WHEN...FROM NOON TODAY TO 10 PM MDT SUNDAY.
* IMPACTS...HEAT RELATED ILLNESSES INCREASE DURING EXTREME HEAT
EVENTS.
* ADDITIONAL DETAILS...SOME LOCATIONS WILL NOT SEE TEMPERATURES FALL
BELOW 90 DEGREES UNTIL SUNSET.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DRINK PLENTY OF FLUIDS, STAY IN AN AIR-CONDITIONED ROOM, STAY OUT OF
THE SUN, AND CHECK UP ON RELATIVES AND NEIGHBORS.
TAKE EXTRA PRECAUTIONS WHEN OUTSIDE. WEAR LIGHTWEIGHT AND LOOSE
FITTING CLOTHING. TRY TO LIMIT STRENUOUS ACTIVITIES TO LATE EVENING.
TAKE ACTION WHEN YOU SEE SYMPTOMS OF HEAT EXHAUSTION AND HEAT STROKE.
HATTINGS
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