Cheyenne, Wyoming
Regional Weather Alerts
| Alert: | Freeze Warning |
| Area(s): | Star Valley |
| Effective: | 2026-09-13 @ 12:10 pm -> 2026-09-14 @ 8:00 am |
| Onset: | 2026-09-14 @ 4:00 am -> 2026-09-14 @ 10:00 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Riverton WY on 2026-09-13 @ 12:10 pm |
| Headline: | Freeze Warning issued September 13 at 11:10AM MDT until September 14 at 9:00AM MDT by NWS Riverton WY |
| Description: |
* WHAT...Sub-freezing temperatures as low as 29 expected. * WHERE...Star Valley County. * WHEN...From 3 AM to 9 AM MDT Monday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. |
| Alert: | High Wind Warning |
| Area(s): | Absaroka Mountains; Cody Foothills; Upper Wind River Basin |
| Effective: | 2026-09-13 @ 12:10 pm -> 2026-09-14 @ 8:00 am |
| Onset: | 2026-09-14 @ 1:00 am -> 2026-09-14 @ 3:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Riverton WY on 2026-09-13 @ 12:10 pm |
| Headline: | High Wind Warning issued September 13 at 11:10AM MDT until September 14 at 2:00PM MDT by NWS Riverton WY |
| Description: |
* WHAT...West winds 30 to 40 mph with gusts up to 55 to 65 mph expected. * WHERE...Upper Wind River Basin, Absaroka Mountains, and Cody Foothills Counties. * WHEN...From midnight tonight to 2 PM MDT Monday. * IMPACTS...Gusty winds will make travel difficult. Strong cross-wind gusts on area highways could cause high-profile vehicle blow-overs. |
| Alert: | Red Flag Warning |
| Area(s): | Sweetwater County/Rock Springs BLM/Flaming Gorge NRA; Natrona County/Casper BLM; Upper Wind River Basin/Wind River Basin; Granite/Green/Ferris/Rattlesnake Mountains; Casper Mountain |
| Effective: | 2026-09-13 @ 11:03 am -> 2026-09-14 @ 8:00 am |
| Onset: | 2026-09-14 @ 1:00 pm -> 2026-09-14 @ 9:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Riverton WY on 2026-09-13 @ 11:03 am |
| Headline: | Red Flag Warning issued September 13 at 10:03AM MDT until September 14 at 8:00PM MDT by NWS Riverton WY |
| Description: |
The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from noon to 8 PM MDT Monday. the Fire Weather Watch is no longer in effect. * AFFECTED AREA: In Central WY Fire Zones...280...283...289...300. In Southwest WY Fire Zone....279. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In Southwest WY...Sweetwater. * IMPACTS: Low Humidities and Strong Gusty Winds could cause erratic fire behavior. * WIND: West 20 to 30 mph with gusts up to 40 to 50 mph. * HUMIDITY: As low as 10 to 15 percent. |
| Alert: | Fire Weather Watch |
| Area(s): | Middle North Platte River Basin/Niobrara and Converse High Plains; North Laramie Range and Adjacent High Plains; North Laramie Valley/Shirley Basin; Ferris/Seminoe/Shirley Mountains; Central and West Carbon; Bordeaux/Chugwater/Wheatland; Goshen/Middle-Lower North Platte River Basin |
| Effective: | 2026-09-13 @ 2:07 am -> 2026-09-13 @ 7:00 pm |
| Onset: | 2026-09-14 @ 1:00 pm -> 2026-09-14 @ 9:00 pm |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Cheyenne WY on 2026-09-13 @ 2:07 am |
| Headline: | Fire Weather Watch issued September 13 at 1:07AM MDT until September 14 at 8:00PM MDT by NWS Cheyenne WY |
| Description: |
The National Weather Service in Cheyenne has issued a Fire Weather Watch, which is in effect from Monday afternoon through Monday evening. * AFFECTED AREA...Fire weather zone 418-422, 432, and 433. * WIND...West to Northwest winds 20 to 40 mph, gusts between 45 to 60 mph. * HUMIDITY...Relative humidities as low as 13 to 18%. * IMPACTS...any fires that develop will likely spread rapidly. Outdoor burning is not recommended. |
| Alert: | High Wind Watch |
| Area(s): | Central Laramie Range and Southwest Platte County; Central Carbon County; North Snowy Range Foothills |
| Effective: | 2026-09-13 @ 1:54 am -> 2026-09-13 @ 7:00 pm |
| Onset: | 2026-09-14 @ 7:00 am -> 2026-09-14 @ 7:00 pm |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Cheyenne WY on 2026-09-13 @ 1:54 am |
| Headline: | High Wind Watch issued September 13 at 12:54AM MDT until September 14 at 6:00PM MDT by NWS Cheyenne WY |
| Description: |
* WHAT...West winds 25 to 40 mph with gusts up to 60 mph possible. * WHERE...North Snowy Range Foothills including Arlington and Elk Mountain along Interstate 80, Bordeaux area along Interstate 25 between Chugwater and Wheatland, and Central Carbon County. * WHEN...From Monday morning through Monday afternoon. * IMPACTS...Mainly to transportation. Strong cross winds will be hazardous to light weight or high profile vehicles, including campers and tractor trailers. |
