Cheyenne, Wyoming

Regional Weather Alerts


     

Alert: Flood Advisory
Area(s): Hot Springs, WY
Effective: 2026-07-16 @ 3:57 pm -> 2026-07-16 @ 7:00 pm
Onset: 2026-07-16 @ 3:57 pm -> 2026-07-16 @ 7:00 pm
Severity: Minor
Certainty: Likely
Urgency: Expected
Issued By: NWS Riverton WY on 2026-07-16 @ 3:57 pm
Headline: Flood Advisory issued July 16 at 2:57PM MDT until July 16 at 6:00PM MDT by NWS Riverton WY
Description: * WHAT...Small stream flooding caused by excessive rainfall is
expected.

* WHERE...Northwestern Hot Springs County in central Wyoming... This
advisory is along the Grass Creek in far western Hot Springs
County.

* WHEN...Until 600 PM MDT.

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

* ADDITIONAL DETAILS...
- At 255 PM MDT, Doppler radar indicated heavy rain due to
thunderstorms. This is causing small stream flooding. Rapid river
rises have already caused minor flooding in the advisory area.
Between 1 and 2 inches of rain have fallen.
- Additional rainfall amounts of 1 to 1.5 inches are expected over
the area. This additional rain will result in minor flooding.
- Some locations that will experience flooding include...
Mainly rural areas of Northwestern Hot Springs County.
- http://www.weather.gov/safety/flood

Alert: Flood Watch
Area(s): Bighorn Mountains West; Bighorn Mountains Southeast; Wind River Mountains West; Wind River Mountains East; Salt River and Wyoming Ranges; Upper Green River Basin Foothills
Effective: 2026-07-16 @ 3:56 pm -> 2026-07-17 @ 12:00 am
Onset: 2026-07-16 @ 3:56 pm -> 2026-07-17 @ 12:00 am
Severity: Severe
Certainty: Possible
Urgency: Future
Issued By: NWS Riverton WY on 2026-07-16 @ 3:56 pm
Headline: Flood Watch issued July 16 at 2:56PM MDT until July 16 at 11:00PM MDT by NWS Riverton WY
Description: * WHAT...Flash flooding caused by excessive rainfall is possible.

* WHERE...Portions of central, north central, and west central
Wyoming, including the following areas, in central Wyoming, Wind
River Mountains East and Wind River Mountains West. In north
central Wyoming, Bighorn Mountains Southeast and Bighorn Mountains
West. In west central Wyoming, Salt River and Wyoming Ranges and
Upper Green River Basin Foothills.

* WHEN...Until 11 PM MDT this evening.

* IMPACTS...Quick water rises on area streams and rivers, especially
on small drainages in the mountains and foothills, leading to
localized flash flooding, which could endanger people and
infrastructure near waterways.

* ADDITIONAL DETAILS...
- Slow-moving showers and thunderstorms will have abundant moisture
today, with dew points in the 50s and 60s, and precipitable water
values in excess of 1 inch. An inch or more of rain is possible
in under an hour, and some locations could quickly see 1 to 3
inches of rain over an hour or two, leading to flash flooding.
- http://www.weather.gov/safety/flood

Alert: Flood Watch
Area(s): Absaroka Mountains; Cody Foothills; Southwest Bighorn Basin; Owl Creek and Bridger Mountains
Effective: 2026-07-16 @ 3:56 pm -> 2026-07-17 @ 12:00 am
Onset: 2026-07-16 @ 3:56 pm -> 2026-07-17 @ 12:00 am
Severity: Severe
Certainty: Possible
Urgency: Future
Issued By: NWS Riverton WY on 2026-07-16 @ 3:56 pm
Headline: Flood Watch issued July 16 at 2:56PM MDT until July 16 at 11:00PM MDT by NWS Riverton WY
Description: * WHAT...Flash flooding caused by excessive rainfall continues to be
possible.

* WHERE...Portions of central and northwest Wyoming, including the
following areas, in central Wyoming, Owl Creek and Bridger
Mountains and Southwest Bighorn Basin. In northwest Wyoming,
Absaroka Mountains and Cody Foothills.

* WHEN...Until 11 PM MDT this evening.

* IMPACTS...Quick water rises on area streams and rivers, especially
on small drainages in the mountains and foothills, leading to
localized flash flooding, which could endanger people and
infrastructure near waterways.

* ADDITIONAL DETAILS...
- Slow-moving showers and thunderstorms will have abundant moisture
today, with dew points in the 50s and 60s, and precipitable water
values in excess of 1 inch. An inch or more of rain is possible
in under an hour, and some locations could quickly see 1 to 3
inches of rain over an hour or two, leading to flash flooding.
- http://www.weather.gov/safety/flood

Alert: Flood Advisory
Area(s): Sheridan, WY
Effective: 2026-07-16 @ 3:17 pm -> 2026-07-16 @ 6:15 pm
Onset: 2026-07-16 @ 3:17 pm -> 2026-07-16 @ 6:15 pm
Severity: Minor
Certainty: Likely
Urgency: Expected
Issued By: NWS Billings MT on 2026-07-16 @ 3:17 pm
Headline: Flood Advisory issued July 16 at 2:17PM MDT until July 16 at 5:15PM MDT by NWS Billings MT
Description: * WHAT...Flooding caused by excessive rainfall from slow moving
thunderstorms is expected.

* WHERE...Northwestern Sheridan County in north central Wyoming...

* WHEN...Until 515 PM MDT.

* IMPACTS...Minor flooding in low-lying and poor drainage areas.

* ADDITIONAL DETAILS...
- At 212 PM MDT, Doppler radar indicated heavy rain due to
thunderstorms. Minor flooding is ongoing or expected to begin
shortly in the advisory area. Between 0.5 and 1.5 inches of rain
have fallen.
- Some locations that will experience flooding include...
Mainly rural areas of Northwestern Sheridan County.
- This includes the northern Bighorn Mountains in Wyoming.
- http://www.weather.gov/safety/flood

Alert: Flood Advisory
Area(s): Washakie, WY
Effective: 2026-07-16 @ 3:14 pm -> 2026-07-16 @ 6:15 pm
Onset: 2026-07-16 @ 3:14 pm -> 2026-07-16 @ 6:15 pm
Severity: Minor
Certainty: Likely
Urgency: Expected
Issued By: NWS Riverton WY on 2026-07-16 @ 3:14 pm
Headline: Flood Advisory issued July 16 at 2:14PM MDT until July 16 at 5:15PM MDT by NWS Riverton WY
Description: * WHAT...Small stream flooding caused by excessive rainfall is
expected.

* WHERE...Southeastern Washakie County in central Wyoming...

* WHEN...Until 515 PM MDT.

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

* ADDITIONAL DETAILS...
- At 214 PM MDT, Doppler radar indicated heavy rain due to
thunderstorms. This is causing small stream flooding. Rapid river
rises have already caused minor flooding in the advisory area.
Between 1 and 2 inches of rain have fallen.
- Additional rainfall amounts of 1 to 1.5 inches are expected over
the area. This additional rain will result in minor flooding.
- Some locations that will experience flooding include...
Big Trails.
- http://www.weather.gov/safety/flood

Alert: Heat Advisory
Area(s): Harding; Northern Perkins; Butte; Northern Meade Co Plains; Ziebach; Northern Foothills; Rapid City; Southern Foothills; Custer Co Plains; Pennington Co Plains; Haakon; Western Fall River; Northern Oglala Lakota; Northern Jackson; Bennett; Mellette; Todd; Tripp; Sturgis/Piedmont Foothills; Southern Meade Co Plains; Hermosa Foothills; Eastern Fall River; Southern Oglala Lakota; Southern Jackson; Southern Perkins; Northern Campbell; Southern Campbell; Western Crook; Weston County Plains; Newcastle; Northeastern Crook
Effective: 2026-07-16 @ 12:25 pm -> 2026-07-16 @ 10:00 pm
Onset: 2026-07-16 @ 12:25 pm -> 2026-07-16 @ 10:00 pm
Severity: Moderate
Certainty: Likely
Urgency: Expected
Issued By: NWS Rapid City SD on 2026-07-16 @ 12:25 pm
Headline: Heat Advisory issued July 16 at 11:25AM MDT until July 16 at 9:00PM MDT by NWS Rapid City SD
Description: * WHAT...Heat index values 95 to 103.

* WHERE...Portions of northwestern, south central, and southwestern
South Dakota and northeast Wyoming.

* WHEN...Until 9 PM MDT /10 PM CDT/ this evening.

* IMPACTS...Hot temperatures may cause heat illnesses.