Cheyenne, Wyoming

Regional Weather Alerts


     

Alert: Flood Watch
Area(s): Converse County Lower Elevations; Niobrara County; North Laramie Range; Ferris/Seminoe/Shirley Mountains; Shirley Basin; Central Laramie Range and Southwest Platte County; East Platte County; Goshen County; Central Carbon County; North Snowy Range Foothills; Southwest Carbon County; Upper North Platte River Basin; Laramie Valley; South Laramie Range; South Laramie Range Foothills; Central Laramie County; East Laramie County
Effective: 2026-07-23 @ 12:58 am -> 2026-07-24 @ 1:00 am
Onset: 2026-07-23 @ 12:58 am -> 2026-07-24 @ 1:00 am
Severity: Severe
Certainty: Possible
Urgency: Future
Issued By: NWS Cheyenne WY on 2026-07-23 @ 12:58 am
Headline: Flood Watch issued July 22 at 11:58PM MDT until July 24 at 12:00AM MDT by NWS Cheyenne WY
Description: * WHAT...Flooding caused by localized excessive thunderstorm
rainfall continues to be possible.

* WHERE...Southeast Wyoming and the western Nebraska panhandle.

* WHEN...Through Thursday evening.

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

* ADDITIONAL DETAILS...
- Localized torrential rainfall in scattered thunderstorm
activity combined with the potential for training
thunderstorms continues to have the potential to produce
flooding.
- http://www.weather.gov/safety/flood

Alert: Flood Watch
Area(s): Sierra Madre Range; Snowy Range
Effective: 2026-07-23 @ 12:58 am -> 2026-07-24 @ 1:00 am
Onset: 2026-07-23 @ 12:58 am -> 2026-07-24 @ 1:00 am
Severity: Severe
Certainty: Possible
Urgency: Future
Issued By: NWS Cheyenne WY on 2026-07-23 @ 12:58 am
Headline: Flood Watch issued July 22 at 11:58PM MDT until July 24 at 12:00AM MDT by NWS Cheyenne WY
Description: * WHAT...Flooding caused by localized excessive thunderstorm
rainfall continues to be possible.

* WHERE...Southeast Wyoming and the western Nebraska panhandle.

* WHEN...Through Thursday evening.

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

* ADDITIONAL DETAILS...
- Localized torrential rainfall in scattered thunderstorm
activity combined with the potential for training
thunderstorms continues to have the potential to produce
flooding.
- http://www.weather.gov/safety/flood

Alert: Flood Advisory
Area(s): Natrona, WY
Effective: 2026-07-23 @ 12:30 am -> 2026-07-23 @ 3:30 am
Onset: 2026-07-23 @ 12:30 am -> 2026-07-23 @ 3:30 am
Severity: Minor
Certainty: Likely
Urgency: Expected
Issued By: NWS Riverton WY on 2026-07-23 @ 12:30 am
Headline: Flood Advisory issued July 22 at 11:30PM MDT until July 23 at 2:30AM MDT by NWS Riverton WY
Description: * WHAT...Flooding caused by excessive rainfall is expected.

* WHERE...West Central Natrona County in central Wyoming near
Hiland...

* WHEN...Until 230 AM MDT.

* IMPACTS...Minor flooding in low-lying and poor drainage areas.
Rises in small streams and normally dry arroyos that drain toward
Hiland.

* ADDITIONAL DETAILS...
- At 1129 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...
South Fork Powder River, Poison Creek, Maverick Butte Draw and
Sand Draw. Additional rainfall amounts up to 1 inch are expected
over the area. This additional rain will result in minor
flooding.
- Some locations that will experience flooding include...
Hiland.
- http://www.weather.gov/safety/flood

Alert: Flood Advisory
Area(s): Fremont, WY; Natrona, WY
Effective: 2026-07-23 @ 12:25 am -> 2026-07-23 @ 3:30 am
Onset: 2026-07-23 @ 12:25 am -> 2026-07-23 @ 3:30 am
Severity: Minor
Certainty: Likely
Urgency: Expected
Issued By: NWS Riverton WY on 2026-07-23 @ 12:25 am
Headline: Flood Advisory issued July 22 at 11:25PM MDT until July 23 at 2:30AM MDT by NWS Riverton WY
Description: * WHAT...Small stream flooding caused by excessive rainfall is
expected.

* WHERE...Eastern Fremont County in central Wyoming...
West Central Natrona County in central Wyoming...

* WHEN...Until 230 AM MDT.

* IMPACTS...Minor flooding in low-lying and poor drainage areas.
Rises in small streams and normally dry arroyos.

* ADDITIONAL DETAILS...
- At 1124 PM MDT, Doppler radar indicated heavy rain due to
thunderstorms. This will cause small stream flooding. Between 1
and 2 inches of rain have fallen.
- This includes the following streams and drainages...
Fish Draw, Middle Fork Sage Hen Creek, Sage Hen Creek, West
Canyon Creek, Maverick Butte Draw, Dry Creek, West Sage Hen
Creek, Canyon Creek, Fraser Draw, Sand Hills Draw, South Fork
Powder River, East Canyon Creek, Cow Camp Creek, Muskrat Creek,
Deer Creek, Poison Creek and Merriam Meadows Draw. Additional
rainfall amounts up to 1 inch are expected over the area. This
additional rain will result in minor flooding.
- Some locations that will experience flooding include...
Mainly rural areas of Eastern Fremont and West Central Natrona
Counties south of US-20/26.
- http://www.weather.gov/safety/flood

Alert: Extreme Heat Watch
Area(s): Musselshell; Treasure; Northern Rosebud; Custer; Fallon; Northern Stillwater; Powder River; Carter; Golden Valley; Red Lodge Foothills; Northern Big Horn; Southern Rosebud; Judith Gap; Beartooth Foothills; Southern Big Horn; Southeastern Carbon; Northern Sweet Grass; Bighorn Canyon; Northern Carbon; Melville Foothills; Northeastern Yellowstone; Southern Wheatland; Southwestern Yellowstone; Sheridan Foothills
Effective: 2026-07-22 @ 11:51 pm -> 2026-07-24 @ 12:00 am
Onset: 2026-07-24 @ 10:00 am -> 2026-07-26 @ 10:00 pm
Severity: Severe
Certainty: Likely
Urgency: Future
Issued By: NWS Billings MT on 2026-07-22 @ 11:51 pm
Headline: Extreme Heat Watch issued July 22 at 10:51PM MDT until July 26 at 9:00PM MDT by NWS Billings MT
Description: * WHAT...Dangerously hot conditions with temperatures 95 to 110
possible.

* WHERE...Portions of central, south central, and southeast Montana
and north central Wyoming.

* WHEN...From Friday morning through Sunday evening.

* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.

Alert: Flood Advisory
Area(s): Fremont, WY
Effective: 2026-07-22 @ 9:26 pm -> 2026-07-23 @ 3:30 am
Onset: 2026-07-22 @ 9:26 pm -> 2026-07-23 @ 3:30 am
Severity: Minor
Certainty: Likely
Urgency: Expected
Issued By: NWS Riverton WY on 2026-07-22 @ 9:26 pm
Headline: Flood Advisory issued July 22 at 8:26PM MDT until July 23 at 2:30AM MDT by NWS Riverton WY
Description: * WHAT...Small stream flooding caused by excessive rainfall is
expected.

* WHERE...Southwestern Fremont County in central Wyoming, especially
along the Middle Fork of the Popo Agie River...

* WHEN...Until 230 AM MDT Thursday.

* IMPACTS...Minor flooding in low-lying and poor drainage areas.
Rises along the Popo Agie River in Sinks Canyon should be
monitored.

* ADDITIONAL DETAILS...
- At 821 PM MDT, Doppler radar indicated heavy rain due to
thunderstorms this afternoon, with additional rain still
occurring. This will cause small stream flooding. Rapid river
rises will cause minor flooding in the advisory area. Between 3
and 4.5 inches of rain have fallen.
- This includes the following streams and drainages...
South Fork Squaw Creek, Squaw Creek, Middle Popo Agie River,
Roaring Fork Creek, Sweetwater Gap Drain, Tayo Creek, Sheep
Creek, Deep Creek, Shoshone Creek, Atlantic Creek and Sweetwater
River.
- Some locations that will experience flooding include...
Frye Lake, Sinks Canyon State Park and Sinks Canyon Campground.
- http://www.weather.gov/safety/flood

Alert: Flood Watch
Area(s): Red Lodge Foothills; Paradise Valley; Livingston Area; Beartooth Foothills; Absaroka/Beartooth Mountains; Southern Big Horn; Southeastern Carbon; Bighorn Canyon; Northern Carbon; Pryor/Northern Bighorn Mountains; Northeast Bighorn Mountains; Sheridan Foothills
Effective: 2026-07-22 @ 4:16 pm -> 2026-07-23 @ 3:00 am
Onset: 2026-07-22 @ 4:16 pm -> 2026-07-23 @ 3:00 am
Severity: Severe
Certainty: Possible
Urgency: Future
Issued By: NWS Billings MT on 2026-07-22 @ 4:16 pm
Headline: Flood Watch issued July 22 at 3:16PM MDT until July 23 at 2:00AM MDT by NWS Billings MT
Description: The combination of a moist and unstable air mass with slow moving
thunderstorms capable of producing very heavy rain, will bring a risk
of flash flooding late this afternoon and evening.

* WHAT...Flash flooding caused by excessive rainfall is possible.

* WHERE...Portions of south central Montana, including the following
areas, Absaroka/Beartooth Mountains, Beartooth Foothills, Bighorn
Canyon, Livingston Area, Northern Carbon, Paradise Valley,
Pryor/Northern Bighorn Mountains, Red Lodge Foothills, Southeastern
Carbon and Southern Big Horn and north central Wyoming, including
the following areas, Northeast Bighorn Mountains and Sheridan
Foothills.

* WHEN...Until 2 AM MDT Thursday.

* IMPACTS...Excessive runoff may result in flooding of rivers,
streams, and other low-lying and flood-prone locations. Recent burn
scars, including the Robertson Draw and East Side south of Red
Lodge, and the Elk along the eastern slopes of the Bighorn
Mountains, are at risk of experiencing flash flooding and debris
flows.

* ADDITIONAL DETAILS...
- Thunderstorms capable of producing very heavy rain are expected
late this afternoon and evening. These storms may cause localized
flash flooding.
- http://www.weather.gov/safety/flood

Alert: Flood Watch
Area(s): 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
Effective: 2026-07-22 @ 1:54 pm -> 2026-07-23 @ 7:00 am
Onset: 2026-07-22 @ 1:54 pm -> 2026-07-23 @ 7:00 am
Severity: Severe
Certainty: Possible
Urgency: Future
Issued By: NWS Riverton WY on 2026-07-22 @ 1:54 pm
Headline: Flood Watch issued July 22 at 12:54PM MDT until July 23 at 6:00AM MDT by NWS Riverton WY
Description: * 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