Cheyenne, Wyoming
Regional Weather Alerts
| Alert: | Freeze Warning |
| Area(s): | Star Valley |
| Effective: | 2026-09-14 @ 4:35 pm -> 2026-09-15 @ 10:00 am |
| Onset: | 2026-09-15 @ 4:00 am -> 2026-09-15 @ 10:00 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Riverton WY on 2026-09-14 @ 4:35 pm |
| Headline: | Freeze Warning issued September 14 at 3:35PM MDT until September 15 at 9:00AM MDT by NWS Riverton WY |
| Description: |
* WHAT...Sub-freezing temperatures 26 to 30 degrees expected. Isolated cold prone areas 22 to 26 degrees. * WHERE...Star Valley. * WHEN...From 3 AM to 9 AM MDT Tuesday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. |
| 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: | 2026-09-14 @ 3:51 am -> 2026-09-14 @ 9:00 pm |
| 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 2026-09-14 @ 3:51 am |
| Headline: | Red Flag Warning issued September 14 at 2:51AM MDT until September 14 at 8:00PM MDT by NWS Riverton WY |
| Description: |
* 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 45 mph. * HUMIDITY: As low as 10 to 15 percent. |
| Alert: | Red Flag Warning |
| Area(s): | Niobrara/Lower Elevations of Converse/Thunder Basin National Grassland; 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; Southwest Carbon County; North Snowy Range Foothills; Bordeaux/Chugwater/Wheatland; Goshen/Middle-Lower North Platte River Basin |
| Effective: | 2026-09-14 @ 2:26 am -> 2026-09-14 @ 9:00 pm |
| Onset: | 2026-09-14 @ 1:00 pm -> 2026-09-14 @ 9:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Cheyenne WY on 2026-09-14 @ 2:26 am |
| Headline: | Red Flag Warning issued September 14 at 1:26AM MDT until September 14 at 8:00PM MDT by NWS Cheyenne WY |
| Description: |
* AFFECTED AREA...Fire weather zones 417-423, 427, 432, and 433. * WIND...West to Northwest winds 20 to 40 mph, gusts between 45 to 60 mph. * HUMIDITY...Relative humidities as low as 10 to 20%. * IMPACTS...any fires that develop will likely spread rapidly. Outdoor burning is not recommended. |
