Cheyenne, Wyoming
Regional Weather Alerts
| Alert: | Red Flag Warning |
| Area(s): | Lincoln and Uinta Counties/Lower Elevations; Upper Green River Basin/Rock Springs BLM; Sweetwater County/Rock Springs BLM/Flaming Gorge NRA |
| Effective: | 2026-03-28 @ 3:16 am -> 2026-03-30 @ 10:00 pm |
| Onset: | 2026-03-28 @ 1:00 pm -> 2026-03-28 @ 9:30 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Riverton WY on 2026-03-28 @ 3:16 am |
| Headline: | Red Flag Warning issued March 28 at 2:16AM MDT until March 30 at 9:00PM MDT by NWS Riverton WY |
| Description: |
* IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Southwest WY Fire Zones...277...279. In West Central WY Fire Zone....278. * COUNTIES AFFECTED: In Southwest WY...Sweetwater...Uinta. In West Central WY...Lincoln...Sublette. * WIND: West 15 to 25 mph with gusts up to 35 mph today and Sunday. West 20 to 30 mph with gusts up to 50 mph Monday. Wind will decrease at night. * HUMIDITY: As low as 11 percent. RH recovery will be fair tonight and Sunday night. * TEMPERATURES: Highs in the mid 60s to low 70s. Lows in the upper 20s to upper 30s. |
| Alert: | Red Flag Warning |
| Area(s): | Upper Wind River Basin/Wind River Basin |
| Effective: | 2026-03-28 @ 3:16 am -> 2026-03-30 @ 10:00 pm |
| Onset: | 2026-03-28 @ 1:00 pm -> 2026-03-28 @ 9:30 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Riverton WY on 2026-03-28 @ 3:16 am |
| Headline: | Red Flag Warning issued March 28 at 2:16AM MDT until March 30 at 9:00PM MDT by NWS Riverton WY |
| Description: |
* IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY...Fire Weather Zone 283. * COUNTIES AFFECTED: In Central WY...Fremont. * WIND: West 15 to 25 mph with gusts 35 to 40 mph Saturday and Sunday. Southwest 20 to 25 mph with gusts up to 50 mph Monday. Wind will decrease at night. * HUMIDITY: As low as 10 percent. RH recovery will be fair to poor tonight and Sunday night. * TEMPERATURES: Highs in the mid 70s. Lows in the lower 40s. |
| Alert: | Fire Weather Watch |
| Area(s): | North Bighorn Basin/Worland BLM; Johnson County/Casper BLM; South Bighorn Basin/Worland BLM |
| Effective: | 2026-03-28 @ 3:16 am -> 2026-03-30 @ 10:00 pm |
| Onset: | 2026-03-30 @ 1:00 pm -> 2026-03-28 @ 9:30 pm |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Riverton WY on 2026-03-28 @ 3:16 am |
| Headline: | Fire Weather Watch issued March 28 at 2:16AM MDT until March 30 at 9:00PM MDT by NWS Riverton WY |
| Description: |
* IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In North Central WY...Fire Weather Zones 275...281 and 282. * COUNTIES AFFECTED: In North Central WY...Big Horn...Hot Springs...Johnson...Park Washakie. * WIND: Northwest 20 to 25 mph with gusts up to 45 mph Monday. * HUMIDITY: As low as 16 percent. * TEMPERATURES: Highs in the lower to middle 70s. |
| Alert: | Red Flag Warning |
| Area(s): | Natrona County/Casper BLM; Granite/Green/Ferris/Rattlesnake Mountains; Casper Mountain |
| Effective: | 2026-03-28 @ 3:16 am -> 2026-03-30 @ 10:00 pm |
| Onset: | 2026-03-28 @ 1:00 pm -> 2026-03-28 @ 9:30 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Riverton WY on 2026-03-28 @ 3:16 am |
| Headline: | Red Flag Warning issued March 28 at 2:16AM MDT until March 30 at 9:00PM MDT by NWS Riverton WY |
| Description: |
* IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY...Fire Weather Zones 280...289 and 300. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In Southwest WY...Sweetwater. * WIND: West 20 to 25 mph with gusts up to 35 mph today and Sunday. West 30 to 40 mph with gusts up to 50 mph Monday. Wind will decrease at night. * HUMIDITY: As low as 10 percent. RH recovery will be fair to poor tonight and Sunday night. * TEMPERATURES: Highs in the low to mid 70s. Lows in the lower 40s. |
| Alert: | Red Flag Warning |
| Area(s): | South Bighorn Mountains; Owl Creek Mountains |
| Effective: | 2026-03-28 @ 3:16 am -> 2026-03-30 @ 10:00 pm |
| Onset: | 2026-03-28 @ 1:00 pm -> 2026-03-28 @ 9:30 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Riverton WY on 2026-03-28 @ 3:16 am |
| Headline: | Red Flag Warning issued March 28 at 2:16AM MDT until March 30 at 9:00PM MDT by NWS Riverton WY |
| Description: |
* IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zone....285. In North Central WY Fire Zone....287. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Hot Springs...Johnson...Washakie. * WIND: West 15 to 25 mph with gusts up to 35 mph Saturday and Sunday. Southwest 20 to 25 mph with gusts up to 50 mph Monday. Wind will decrease at night. * HUMIDITY: As low as 10 percent. RH recovery will be fair to poor tonight and Sunday night. * TEMPERATURES: Highs in the mid 60s. Lows in the mid 40s. |
| Alert: | Red Flag Warning |
| Area(s): | Cody Foothills |
| Effective: | 2026-03-28 @ 3:16 am -> 2026-03-30 @ 10:00 pm |
| Onset: | 2026-03-28 @ 1:00 pm -> 2026-03-28 @ 9:30 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Riverton WY on 2026-03-28 @ 3:16 am |
| Headline: | Red Flag Warning issued March 28 at 2:16AM MDT until March 30 at 9:00PM MDT by NWS Riverton WY |
| Description: |
* IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In North Central WY...Fire Weather Zone 276. * COUNTIES AFFECTED: In North Central WY...Park. * WIND: West 15 to 25 mph with gusts up to 35 mph Saturday and Sunday. Southwest 20 to 25 mph with gusts up to 50 mph Monday. Wind will decrease at night. * HUMIDITY: As low as 9 percent. RH recovery will be fair to poor tonight and Sunday night. * TEMPERATURES: Highs in the low 70s. Lows in the mid 40s. |
| Alert: | Red Flag Warning |
| Area(s): | Southern Campbell |
| Effective: | 2026-03-28 @ 2:32 am -> 2026-03-28 @ 7:00 pm |
| Onset: | 2026-03-28 @ 10:00 am -> 2026-03-28 @ 5:45 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Rapid City SD on 2026-03-28 @ 2:32 am |
| Headline: | Red Flag Warning issued March 28 at 1:32AM MDT until March 28 at 6:00PM MDT by NWS Rapid City SD |
| Description: |
...RED FLAG WARNING IN EFFECT FROM 9 AM MDT /10 AM CDT/ TO 6 PM MDT /7 PM CDT/ SATURDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 315, 325, 326, 332, 333, 334, AND 335... .Gusty southwest winds at 20-30 mph with gusts around 40-50 mph are expected over parts of southwest into south-central South Dakota later this morning into the afternoon hours. The minimum relative humidity will drop as low as 11 percent. Over southern Campbell County in Wyoming, west winds will increase to 10-20 mph with gusts from 25-30 mph this afternoon. The minimum relative humidity will drop as low as 8 percent. Combined with unseasonably warm temperatures, expect critical fire weather conditions later this morning and this afternoon. The National Weather Service in Rapid City has issued a Red Flag Warning for gusty winds and low relative humidity, which is in effect from 9 AM this morning to 6 PM MDT this evening. * AFFECTED AREA...Fire Weather Zone 315 Southern Campbell. * WINDS...West 10 to 20 mph with gusts from 25 to 30 mph. * RELATIVE HUMIDITY...As low as 8 percent. * IMPACTS...The combination of gusty winds and low relative humidity would produce critical fire weather conditions. |
| 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; Upper North Platte River Basin; North Snowy Range Foothills; Southern Laramie Valley; Southern Laramie Range; Laramie Foothills and High Plains; Laramie East High Plains; Bordeaux/Chugwater/Wheatland; Goshen/Middle-Lower North Platte River Basin |
| Effective: | 2026-03-28 @ 2:12 am -> 2026-03-30 @ 10:00 pm |
| Onset: | 2026-03-28 @ 11:00 am -> 2026-03-28 @ 7:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Cheyenne WY on 2026-03-28 @ 2:12 am |
| Headline: | Red Flag Warning issued March 28 at 1:12AM MDT until March 30 at 9:00PM MDT by NWS Cheyenne WY |
| Description: |
...RED FLAG WARNING IN EFFECT SATURDAY THROUGH MONDAY FOR MOST OF SOUTHEAST WYOMING... ...RED FLAG WARNING IN EFFECT SUNDAY THROUGH MONDAY FOR THE WESTERN NEBRASKA PANHANDLE... * AFFECTED AREA...All of southeast Wyoming except the higher mountains where snow cover remains, including fire weather zones 417, 418, 419, 420, 421, 422, 423, 425, 427, 428, 429, 430, 431, 432, and 433. * WIND...West winds 15 to 25 mph with gusts of 30 to 45 mph mainly between 10AM and 8PM each day. * HUMIDITY...Minimums of 8 to 15 percent during the afternoon, maximums of 35 to 50 percent in the early morning. * ADDITIONAL DETAILS...Widely scattered virga showers each evening may produce isolated dry lightning along with gusty and erratic winds. * IMPACTS...any fires that develop will likely spread rapidly. Outdoor burning is not recommended. |