Cheyenne, Wyoming
Regional Weather Alerts
| Alert: | Flood Watch |
| Area(s): | Musselshell; Treasure; Northern Rosebud; Custer; Fallon; Powder River; Carter; Northern Big Horn; Southern Rosebud; Southern Big Horn; Bighorn Canyon; Pryor/Northern Bighorn Mountains; Northeastern Yellowstone; Southwestern Yellowstone; Northeast Bighorn Mountains; Sheridan Foothills |
| Effective: | 2026-09-20 @ 2:56 pm -> 2026-09-20 @ 7:00 pm |
| Onset: | 2026-09-20 @ 2:56 pm -> 2026-09-20 @ 7:00 pm |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Billings MT on 2026-09-20 @ 2:56 pm |
| Headline: | Flood Watch issued September 20 at 1:56PM MDT until September 20 at 6:00PM MDT by NWS Billings MT |
| Description: |
Showers continue over southeast Montana and northern Wyoming today. A few thunderstorms may develop as well. The risk of flooding continues. * WHAT...Flooding caused by excessive rainfall is possible, along with flash flooding over recent burn scars. * WHERE...Southeast Montana and Sheridan County Wyoming. * WHEN...Until 6 PM MDT this evening. * IMPACTS...Excessive runoff may result in flooding of creeks and other low-lying and flood-prone locations. Flooding may occur in poor drainage and urban areas. The risk of flooding will diminish late this afternoon and evening as showers taper off. * ADDITIONAL DETAILS... - The heaviest rainfall is slowly shifting eastward to southeast Montana and northeast Wyoming. - The Elk and McGhee-Remington burn scars are particularly vulnerable to flash flooding and debris flows. Any other burn scars from this summer will have elevated flash flood potential as well. - http://www.weather.gov/safety/flood |
| Alert: | Special Weather Statement |
| Area(s): | Central Laramie County; East Laramie County |
| Effective: | 2026-09-20 @ 2:56 pm -> 2026-09-20 @ 3:45 pm |
| Onset: | 2026-09-20 @ 2:56 pm |
| Severity: | Moderate |
| Certainty: | Observed |
| Urgency: | Expected |
| Issued By: | NWS Cheyenne WY on 2026-09-20 @ 2:56 pm |
| Headline: | Special Weather Statement issued September 20 at 1:56PM MDT by NWS Cheyenne WY |
| Description: |
At 156 PM MDT, Doppler radar was tracking strong thunderstorms along a line extending from Burns to 7 miles west of Carpenter. Movement was east at 15 mph. HAZARD...Wind gusts up to 40 mph and half inch hail. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Minor hail damage to vegetation is possible. Locations impacted include... Pine Bluffs, Burns, Egbert, Carpenter, and Pine Bluffs Municipal Airport. |
| Alert: | Special Weather Statement |
| Area(s): | South Laramie Range Foothills; Central Laramie County; East Laramie County |
| Effective: | 2026-09-20 @ 2:10 pm -> 2026-09-20 @ 3:00 pm |
| Onset: | 2026-09-20 @ 2:10 pm |
| Severity: | Moderate |
| Certainty: | Observed |
| Urgency: | Expected |
| Issued By: | NWS Cheyenne WY on 2026-09-20 @ 2:10 pm |
| Headline: | Special Weather Statement issued September 20 at 1:10PM MDT by NWS Cheyenne WY |
| Description: |
At 110 PM MDT, Doppler radar was tracking a strong thunderstorm over Laramie County Fairgrounds at Archer, or near Cheyenne, moving east at 15 mph. HAZARD...Wind gusts up to 40 mph and penny size hail. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Minor hail damage to vegetation is possible. Locations impacted include... Cheyenne, Burns, Laramie County Fairgrounds at Archer, Hillsdale, Carpenter, Cowboy Ranch South, and Grass Hills. |
| Alert: | Flood Watch |
| Area(s): | Bighorn Mountains West; Bighorn Mountains Southeast; Northeast Johnson County; Southeast Johnson County |
| Effective: | 2026-09-20 @ 1:49 pm -> 2026-09-20 @ 7:00 pm |
| Onset: | 2026-09-20 @ 1:49 pm -> 2026-09-20 @ 7:00 pm |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Riverton WY on 2026-09-20 @ 1:49 pm |
| Headline: | Flood Watch issued September 20 at 12:49PM MDT until September 20 at 6:00PM MDT by NWS Riverton WY |
| Description: |
* WHAT...Flash flooding caused by moderate to heavy rainfall is possible, especially in terrain and poor drainage areas. * WHERE...A portion of north central Wyoming, including the Bighorn Mountains and Johnson County. * WHEN...Until 6 PM MDT this evening. * IMPACTS...Heavy rainfall may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Flooding may occur in poor drainage and urban areas and around steep terrain. * ADDITIONAL DETAILS... - As a weather system shifts into the High Plains, lingering moisture will allow for showers and thunderstorms to be capable of moderate to heavy rainfall across the Watch Area. - http://www.weather.gov/safety/flood |
