Wyoming Water Alerts — 9 Active Issues
Data source: NWS, EPA SDWIS
9 active water-related issues in Wyoming. Last updated: 2026-08-11.
Weather & Safety Alerts (9)
Active alerts from the National Weather Service that may affect water safety:
Red Flag Warning — Severe
Areas: Upper Green River Basin/Rock Springs BLM; Sweetwater County/Rock Springs BLM/Flaming Gorge NRA
Red Flag Warning issued August 11 at 2:17AM MDT until August 11 at 9:00PM MDT by NWS Riverton WY
Expires: August 12, 2026
Red Flag Warning — Severe
Areas: Natrona County/Casper BLM; Johnson County/Casper BLM; South Bighorn Mountains; Casper Mountain
Red Flag Warning issued August 11 at 2:17AM MDT until August 11 at 9:00PM MDT by NWS Riverton WY
Expires: August 12, 2026
Red Flag Warning — Severe
Areas: Yellowstone National Park
Red Flag Warning issued August 11 at 2:17AM MDT until August 11 at 9:00PM MDT by NWS Riverton WY
Expires: August 12, 2026
Red Flag Warning — Severe
Areas: Upper Wind River Basin/Wind River Basin; Owl Creek Mountains; Granite/Green/Ferris/Rattlesnake Mountains
Red Flag Warning issued August 11 at 2:17AM MDT until August 11 at 9:00PM MDT by NWS Riverton WY
Expires: August 12, 2026
Red Flag Warning — Severe
Areas: Absaroka Mountains/North Shoshone NF
Red Flag Warning issued August 11 at 2:17AM MDT until August 11 at 9:00PM MDT by NWS Riverton WY
Expires: August 12, 2026
Red Flag Warning — Severe
Areas: 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 Larami...
Red Flag Warning issued August 11 at 1:08AM MDT until August 11 at 9:00PM MDT by NWS Cheyenne WY
Expires: August 12, 2026
Air Quality Alert — Info
Areas: Yellowstone National Park; Absaroka Mountains; Cody Foothills; North Bighorn Basin; Southwest Bighorn Basin; Southeast Bighorn Basin; Owl Creek and Bridger Mountains; Bighorn Mountains West; Bighor...
Air Quality Alert issued August 11 at 11:55AM MDT by NWS Riverton WY
Expires: August 12, 2026
Air Quality Alert — Info
Areas: Northeast Bighorn Mountains; Sheridan Foothills
Air Quality Alert issued August 11 at 11:37AM MDT by NWS Billings MT
Expires: August 12, 2026
Air Quality Alert — Info
Areas: Northern Campbell; Southern Campbell; Western Crook; Wyoming Black Hills; Weston County Plains; Newcastle; Northeastern Crook
Air Quality Alert issued August 11 at 10:19AM MDT by NWS Rapid City SD
Expires: August 12, 2026
High-Risk Areas (Forecast)
ZIP codes in Wyoming with the highest probability of future violations:
| ZIP | City | 2-Year Probability | Trend |
|---|---|---|---|
| 82001 | Cheyenne | 95% | declining |
| 82007 | Cheyenne | 95% | declining |
| 82009 | Cheyenne | 95% | declining |
| 82240 | Torrington | 95% | increasing |
| 82301 | Rawlins | 95% | declining |
| 82414 | Cody | 95% | increasing |
| 82443 | Thermopolis | 95% | increasing |
| 82501 | Riverton | 95% | increasing |
| 82601 | Casper | 95% | increasing |
| 82604 | Casper | 95% | increasing |
Sources
- Weather alerts: National Weather Service
- Violations & enforcement: EPA SDWIS
- Compliance forecasts: ZipCheckup analysis
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