Hazard Report Provided By forecast.weather.gov

Flood Watch
National Weather Service Riverton WY
1254 PM MDT Wed Jul 22 2026

WYZ001>020-022>030-231200-
/O.CON.KRIW.FA.A.0004.000000T0000Z-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 Rock Springs, Star Valley Ranch, Lake,
Shoshoni, Greybull, Casper, Mammoth, Wamsutter, Cokeville, Buffalo,
Green River, Farson, Clark, Lovell, Cody, Jackson, Worland, Pinedale,
Jeffrey City, Shell, Kaycee, Ten Sleep, Alpine, Thermopolis,
Riverton, Big Piney, Lander, Meeteetse, Powell, La Barge, Dubois,
Kemmerer, Basin, Afton, Thayne, and Old Faithful
1254 PM MDT Wed Jul 22 2026

...FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TONIGHT...

* WHAT...Flooding caused by excessive rainfall continues to be
  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...Until late Wednesday night. The most likely period of
  possible flooding is between 3pm Wednesday through 4am MDT
  Thursday.

* 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 and abnormally high
    moisture in the air 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.

&&

$$

Wittmann

Flood Advisory
National Weather Service Riverton WY
321 PM MDT Wed Jul 22 2026

WYC029-039-230015-
/O.NEW.KRIW.FA.Y.0034.260722T2121Z-260723T0015Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Park WY-Teton WY-
321 PM MDT Wed Jul 22 2026

...FLOOD ADVISORY IN EFFECT UNTIL 615 PM MDT THIS EVENING...

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

* WHERE...Northwestern Park County in central Wyoming...
  North Central Teton County in northwestern Wyoming...

* WHEN...Until 615 PM MDT.

* IMPACTS...Minor flooding in low-lying and poor drainage areas.
  Overflowing poor drainage areas. Ponding of water in urban or other
  areas is occurring or is imminent.

* ADDITIONAL DETAILS...
  - At 321 PM MDT, Doppler radar indicated heavy rain due to
    thunderstorms. Minor flooding is ongoing or expected to begin
    shortly in the advisory area. Between 1 and 2 inches of rain have
    fallen.
  - This includes the following streams and drainages...
    Canyon Creek, Sour Creek, Secret Valley Creek, Alum Creek,
    Virginia Cascade, Observation Peak Creek, Gibbon Geyser Basin,
    Mary Mountain Creek, Cougar Creek, Paintpot Hill Creek, Gibbon
    River, Cascade Creek, Yellowstone River, Elk Antler Creek, Nez
    Perce Creek, Gibson Geyser Creek, Otter Creek, Cowan Creek,
    Spruce Creek, Firehole River, Solfatara Creek, National Park
    Mountain Creek, Duck Creek, Trout Creek, Madison River and
    Madison Valley Drain. Additional rainfall amounts of 0.5 to 2
    inches are expected over the area. This additional rain will
    result in minor flooding.
  - Some locations that will experience flooding include...
    Madison, Canyon, Virginia Cascade, Norris Junction, Gibbons
    Falls, Lower Falls and Harlequin Lake.
  - http://www.weather.gov/safety/flood

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don`t drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Flooding is occurring or is imminent. It is important to know where
you are relative to streams, rivers, or creeks which can become
killers in heavy rains. Campers and hikers should avoid streams or
creeks.

Please report observed flooding to local emergency services or law
enforcement and request they pass this information to the National
Weather Service when you can do so safely.

&&

LAT...LON 4467 11091 4474 11091 4474 11041 4463 11040
      4461 11069 4464 11091


$$

Rowe

Hazard Report Provided By forecast.weather.gov