Extreme Heat Warning
Status
Event Continued Active alertStart Time
Sat 07/11/2026 02:00 PM EDTEnd Time
Mon 07/13/2026 11:00 PM EDTSignificance
WarningImpacts
High impact
Locations Affected
Casper, WY ∙ Alcova, WY ∙ Moose, WY ∙ Kirby, WY ∙ National Elk Refuge, WY ∙ Big Sandy, WY ∙ Hudson, WY ∙ Etna, WY ∙ Clarks Fork Canyon, WY ∙ Manderson, WYFull Alert Message
URGENT - WEATHER MESSAGE National Weather Service Riverton WY 131 AM MDT Sat Jul 11 2026 ...EXTREME HEAT WARNING REMAINS IN EFFECT FROM NOON TODAY TO 9 PM MDT MONDAY... * WHAT...Dangerously hot conditions with temperatures from 100 to 110 degrees below 6,000 feet and 90 to 100 degrees between 6,000 and 7,500 feet each day. * WHERE...Portions of central, north central, northwest, south central, southwest, and west central Wyoming. * WHEN...From noon today to 9 PM MDT Monday. The hottest temperatures are expected on Sunday afternoon. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. 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.
Technical Header
WYZ003>006-010-011-013-016>020-023-025>030-120015- /O.CON.KRIW.XH.W.0001.260711T1800Z-260714T0300Z/ 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 Shell, Alpine, Kemmerer, Jackson, Buffalo, Afton, Pinedale, Lovell, Thermopolis, Shoshoni, Kaycee, Green River, La Barge, Worland, Thayne, Cokeville, Cody, Clark, Basin, Riverton, Lander, Rock Springs, Casper, Meeteetse, Jeffrey City, Greybull, Big Piney, Ten Sleep, Powell, Farson, Wamsutter, Dubois, and Star Valley Ranch 131 AM MDT Sat Jul 11 2026
