Hazard Report Provided By forecast.weather.gov

Flood Watch
National Weather Service Riverton WY
157 AM MDT Tue Jul 21 2026

WYZ001>020-022>030-220000-
/O.NEW.KRIW.FA.A.0004.260721T1800Z-260723T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
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-
Including the cities of Jackson, Kemmerer, Cokeville, Big Piney,
Shoshoni, Kaycee, Star Valley Ranch, Ten Sleep, Old Faithful,
Greybull, Lander, Powell, Riverton, Casper, Cody, Alpine, Meeteetse,
Thayne, Dubois, Buffalo, Clark, Jeffrey City, Rock Springs, Mammoth,
Afton, Worland, La Barge, Lovell, Farson, Lake, Shell, Wamsutter,
Basin, Green River, Thermopolis, and Pinedale
157 AM MDT Tue Jul 21 2026

...FLOOD WATCH IN EFFECT FROM NOON MDT TODAY THROUGH LATE WEDNESDAY
NIGHT...

* WHAT...Flooding caused by excessive rainfall is possible.

* WHERE...Portions of central, north central, northwest, south
  central, southwest, and west central Wyoming, including the
  following areas, in central Wyoming, Casper Mountain, Green
  Mountains and Rattlesnake Range, Lander Foothills, Natrona County
  Lower Elevations, Owl Creek and Bridger Mountains, Southwest
  Bighorn Basin, Upper Wind River Basin, Wind River Basin, Wind River
  Mountains East and Wind River Mountains West. In north central
  Wyoming, Bighorn Mountains Southeast, Bighorn Mountains West,
  Northeast Johnson County, Southeast Bighorn Basin and Southeast
  Johnson County. In northwest Wyoming, Absaroka Mountains, Cody
  Foothills, Jackson Hole, North Bighorn Basin, Teton and Gros Ventre
  Mountains and Yellowstone National Park. In south central Wyoming,
  East Sweetwater County, Flaming Gorge and Rock Springs and Green
  River. In southwest Wyoming, South Lincoln County. In west central
  Wyoming, Salt River and Wyoming Ranges, Star Valley, Upper Green
  River Basin and Upper Green River Basin Foothills.

* WHEN...From noon MDT today through late Wednesday night. The most
  likely period of possible flooding looks to be Wednesday afternoon
  through Wednesday evening.

* IMPACTS...Excessive runoff may result in flooding of rivers,
  creeks, streams, and other low-lying and flood-prone locations.

* ADDITIONAL DETAILS...
  - Slow moving showers and thunderstorms can bring locally heavy
    rainfall that could lead to flooding.
  - http://www.weather.gov/safety/flood

PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be alert for possible Flood
Warnings. Those living in areas prone to flooding should be prepared
to take action should flooding develop.

&&

$$

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Hazard Report Provided By forecast.weather.gov