Cheyenne, Wyoming
Regional Weather Alerts
| Alert: | Red Flag Warning |
| Area(s): | Sweetwater County/Rock Springs BLM/Flaming Gorge NRA; Natrona County/Casper BLM; Johnson County/Casper BLM; Granite/Green/Ferris/Rattlesnake Mountains |
| Effective: | 2026-10-09 @ 9:43 am -> 2026-10-09 @ 8:00 pm |
| Onset: | 2026-10-09 @ 1:00 pm -> 2026-10-09 @ 8:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Riverton WY on 2026-10-09 @ 9:43 am |
| Headline: | Red Flag Warning issued October 9 at 8:43AM MDT until October 9 at 7:00PM MDT by NWS Riverton WY |
| Description: |
* IMPACTS: Low humidity...unseasonably warm temperatures...and strong gusty wind could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zones...280...289. In North Central WY Fire Zone....281. In Southwest WY Fire Zone....279. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Johnson. In Southwest WY...Sweetwater. * WIND: Southwest 15 to 25 mph with gusts 35 to 45 mph. * HUMIDITY: As low as 10 to 15 percent. * TEMPERATURES: Highs in the mid to upper 70s. |
| Alert: | Red Flag Warning |
| Area(s): | North Bighorn Basin/Worland BLM; Cody Foothills; South Bighorn Basin/Worland BLM; South Bighorn Mountains; Owl Creek Mountains |
| Effective: | 2026-10-09 @ 9:43 am -> 2026-10-09 @ 8:00 pm |
| Onset: | 2026-10-09 @ 1:00 pm -> 2026-10-09 @ 8:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Riverton WY on 2026-10-09 @ 9:43 am |
| Headline: | Red Flag Warning issued October 9 at 8:43AM MDT until October 9 at 7:00PM MDT by NWS Riverton WY |
| Description: |
* IMPACTS: Low humidity...unseasonably warm temperatures...and strong gusty wind could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zone....285. In North Central WY Fire Zones...275...276...282...287. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Big Horn...Hot Springs...Johnson...Park Washakie. * WIND: Southwest 15 to 25 mph with gusts up to 35 mph. * HUMIDITY: As low as 8 to 13 percent. * TEMPERATURES: Highs in the lower to mid 80s. |
| Alert: | Red Flag Warning |
| Area(s): | Pine Ridge/Nebraska National Forest; 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; Upper North Platte River Basin; North Snowy Range Foothills; Bordeaux/Chugwater/Wheatland |
| Effective: | 2026-10-09 @ 3:59 am -> 2026-10-09 @ 8:00 pm |
| Onset: | 2026-10-09 @ 1:00 pm -> 2026-10-09 @ 8:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Cheyenne WY on 2026-10-09 @ 3:59 am |
| Headline: | Red Flag Warning issued October 9 at 2:59AM MDT until October 9 at 7:00PM MDT by NWS Cheyenne WY |
| Description: |
...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 7 PM MDT THIS EVENING DUE TO WIND AND LOW RELATIVE HUMIDITY FOR PORTIONS OF NE AND WY... * AFFECTED AREA...Fire Weather Zones 417 through 422, 425, 427, and 432. * TIMING...From noon today to 7 PM MDT this evening. * WINDS...Southwest winds 15 to 25 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...Relative Humidity between 12 to 18 percent. * IMPACTS...Any fires that develop will spread rapidly. Outdoor burning is not recommended. |
| Alert: | Red Flag Warning |
| Area(s): | Gallatin National Forest; Wheatland County/Sweet Grass County; Beartooth Ranger District Custer National Forest; Sheridan County/Casper BLM; Bighorn National Forest |
| Effective: | 2026-10-09 @ 1:48 am -> 2026-10-09 @ 10:00 pm |
| Onset: | 2026-10-09 @ 1:00 pm -> 2026-10-09 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2026-10-09 @ 1:48 am |
| Headline: | Red Flag Warning issued October 9 at 12:48AM MDT until October 9 at 9:00PM MDT by NWS Billings MT |
| Description: |
* IMPACTS: Low humidities, unseasonably warm temperatures, and strong gusty winds will create erratic fire behavior and rapid spread for new or existing fires. * AFFECTED AREA: In North Central WY Fire Zones...274...284. In South Central MT Fire Zones...123...124...126. * COUNTIES AFFECTED: In Central MT...Wheatland. In North Central WY...Big Horn...Johnson...Sheridan...Washakie. In South Central MT...Carbon...Park...Stillwater...Sweet Grass. In Southwest MT...Gallatin. * WIND: Southwest 15 to 30 mph with gusts up to 45 mph. * HUMIDITY: As low as 7 percent. * TEMPERATURES: 84 to 90 degrees, warmest over Zone WY274. * ADDITIONAL DETAILS: The worst conditions are expected across the lower to middle elevations in fine fuels. The strongest winds are expected in mountain locations and the foothills west of Billings. Zone WY274 will see lower wind gusts of 15 to 25 mph. |
| Alert: | Red Flag Warning |
| Area(s): | Central Black Hills; Southern Black Hills; Fall River County Area; Northern Foot Hills; Eastern Foot Hills; Custer County Plains; Pine Ridge Area; Butte County Area; West Central Plains; Badlands Area; Northern Campbell; Southern Campbell; Crook County Plains; Weston County Plains; Wyoming Black Hills |
| Effective: | 2026-10-09 @ 1:12 am -> 2026-10-09 @ 4:15 pm |
| Onset: | 2026-10-09 @ 12:00 pm -> 2026-10-09 @ 9:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Rapid City SD on 2026-10-09 @ 1:12 am |
| Headline: | Red Flag Warning issued October 9 at 12:12AM MDT until October 9 at 8:00PM MDT by NWS Rapid City SD |
| Description: |
...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 8 PM MDT THIS EVENING DUE TO GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR CENTRAL BLACK HILLS, SOUTHERN BLACK HILLS, FALL RIVER COUNTY AREA, NORTHERN FOOT HILLS, EASTERN FOOT HILLS, CUSTER COUNTY PLAINS, PINE RIDGE AREA, BUTTE COUNTY AREA, WEST CENTRAL PLAINS, BADLANDS AREA, NORTHERN CAMPBELL, SOUTHERN CAMPBELL, CROOK COUNTY PLAINS, WESTON COUNTY PLAINS, AND WYOMING BLACK HILLS... * AFFECTED AREA...Fire Weather Zones 314, 315, 316, 317, 318, 320, 321, 322, 323, 324, 325, 326, 327, 329, and 332. * TIMING...From 11 AM this morning to 8 PM MDT this evening. * WINDS...Southwest winds 10 to 20 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 10 percent. * IMPACTS...Any fires that develop will spread rapidly. Outdoor burning is not recommended. |
| Alert: | Hydrologic Outlook |
| Area(s): | Beaver, UT; Box Elder, UT; Cache, UT; Carbon, UT; Davis, UT; Duchesne, UT; Emery, UT; Garfield, UT; Iron, UT; Juab, UT; Kane, UT; Millard, UT; Morgan, UT; Piute, UT; Rich, UT; Salt Lake, UT; Sanpete, UT; Sevier, UT; Summit, UT; Tooele, UT; Utah, UT; Wasatch, UT; Washington, UT; Wayne, UT; Weber, UT; Uinta, WY |
| Effective: | 2026-10-08 @ 4:13 pm -> 2026-10-09 @ 7:00 pm |
| Onset: | 2026-10-08 @ 4:13 pm |
| Severity: | Unknown |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Salt Lake City UT on 2026-10-08 @ 4:13 pm |
| Headline: | Hydrologic Outlook issued October 8 at 3:13PM MDT by NWS Salt Lake City UT |
| Description: |
ESFSLC The remnants of Tropical Storm Rachel will merge with a fall-like storm system over the western United States, bringing moderate to heavy rainfall and a resulting threat of flooding. Widespread rainfall of 1 to 3 inches is expected, locally in excess of 3 inches, particularly across south aspects of southern Utah mountains, between late Saturday and Monday morning. Expect many area waterways including streams, rivers, normally dry washes, creeks, and slot canyons to have rising, fast flows by Sunday evening. Current forecasts do not bring any rivers to flood stage, but this will be monitored as the fine details of heavy rain bands become more confident. Those with activities near rivers, streams, creeks and recent burn scars should closely monitor the forecast over the next several days. Those with outdoor plans Sunday onward that include any travel near waterways across Utah should consider alternate plans. Scattered showers and thunderstorms will remain possible through at least Wednesday. While the rainfall rates with these additional rounds of precipitation will generally be lower, areas that receive significant precipitation during the weekend will be extra sensitive to any additional rainfall. |
| Alert: | Hydrologic Outlook |
| Area(s): | Fremont, WY; Hot Springs, WY; Lincoln, WY; Park, WY; Sublette, WY; Sweetwater, WY; Teton, WY |
| Effective: | 2026-10-08 @ 2:47 pm -> 2026-10-09 @ 11:00 am |
| Onset: | 2026-10-08 @ 2:47 pm |
| Severity: | Unknown |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Riverton WY on 2026-10-08 @ 2:47 pm |
| Headline: | Hydrologic Outlook issued October 8 at 1:47PM MDT by NWS Riverton WY |
| Description: |
ESFRIW The interaction between increasing tropical moisture and an approaching midlevel area of low pressure will bring widespread rain showers across a large portion of western Wyoming starting late Saturday night. Given the high moisture content, some areas could feature locally heavy rainfall and possibly lead to localized flooding. Poor drainage areas, urban areas, and steep terrain will be the most susceptible locations for this isolated flooding. Many locations across western Wyoming could see 1 to 2 inches of rainfall through Tuesday morning. Remember, if you encounter a flooded roadway, Turn Around, Don't Drown! |
