Cheyenne, Wyoming

Regional Weather Alerts


     
Alert: Red Flag Warning
Area(s): Cody Foothills; South Bighorn Basin/Worland BLM; Upper Wind River Basin/Wind River Basin; Owl Creek Mountains
Effective: 2026-03-18 @ 3:05 pm -> 2026-03-21 @ 10:00 pm
Onset: 2026-03-18 @ 3:05 pm -> 2026-03-19 @ 8:00 am
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Riverton WY on 2026-03-18 @ 3:05 pm
Headline: Red Flag Warning issued March 18 at 2:05PM MDT until March 21 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....283.
 In North Central WY Fire Zones...276...282...287.
* COUNTIES AFFECTED:
 In Central WY...Fremont.
 In North Central WY...Hot Springs...Park...Washakie.
* WIND: Southwest 20 to 30 mph with gusts up to 45 mph today and
 Saturday, southwest 15 to 25 mph with gusts to 30 mph Thursday
 and Friday.
* HUMIDITY: As low as 10 percent.
* TEMPERATURES: Highs in 70s today, the upper 70s to lower 80s
 Thursday through Saturday.
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: 2026-03-18 @ 3:05 pm -> 2026-03-21 @ 10:00 pm
Onset: 2026-03-18 @ 3:05 pm -> 2026-03-19 @ 8:00 am
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Riverton WY on 2026-03-18 @ 3:05 pm
Headline: Red Flag Warning issued March 18 at 2:05PM MDT until March 21 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 40 mph with the
 strongest winds today and likely Saturday.
* HUMIDITY: As low as 10 percent.
* TEMPERATURES: Highs around 70 Wednesday, in the 70s Thursday
 through Saturday.
Alert: Red Flag Warning
Area(s): Natrona County/Casper BLM; Johnson County/Casper BLM; Granite/Green/Ferris/Rattlesnake Mountains
Effective: 2026-03-18 @ 3:05 pm -> 2026-03-21 @ 10:00 pm
Onset: 2026-03-18 @ 3:05 pm -> 2026-03-19 @ 8:00 am
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Riverton WY on 2026-03-18 @ 3:05 pm
Headline: Red Flag Warning issued March 18 at 2:05PM MDT until March 21 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 Zones...280...289.
 In North Central WY Fire Zone....281.
* COUNTIES AFFECTED:
 In Central WY...Fremont...Natrona.
 In North Central WY...Johnson.
 In Southwest WY...Sweetwater.
* WIND: West 20 to 30 mph with gusts up to 45 mph today and
 Saturday; 15 to 25 mph with gusts to 35 mph Thursday and Friday.
* HUMIDITY: As low as 12 percent.
* TEMPERATURES: Highs 70 to 75 today, 75 to 80 Thursday through
 Saturday.
Alert: Red Flag Warning
Area(s): Pine Ridge/Nebraska National Forest; Box Butte/South Sioux/Niobrara River; Lower North Platte River Basin/Scottsbluff National Monument; Lodgepole Creek/Southern Nebraska Panhandle; 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; Laramie Foothills and High Plains; Laramie East High Plains; Bordeaux/Chugwater/Wheatland; Goshen/Middle-Lower North Platte River Basin
Effective: 2026-03-18 @ 11:37 am -> 2026-03-21 @ 9:00 pm
Onset: 2026-03-18 @ 11:37 am -> 2026-03-19 @ 7:00 am
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Cheyenne WY on 2026-03-18 @ 11:37 am
Headline: Red Flag Warning issued March 18 at 10:37AM MDT until March 21 at 8:00PM MDT by NWS Cheyenne WY
Description: ...Multi Day Red Flag Warning...
.Critical fire conditions are expected through the week, with
 poor overnight humidity recoveries and no precipitation.
* AFFECTED AREA...Fire weather zone 417, 418, 419, 430, 431,
 432, 433, 434, 435, 436, and 437.
* WIND...Sustained winds 20 to 30 mph, gusting up to 35 mph.
* HUMIDITY...8 to 13 percent.
* IMPACTS...Any fires that develop will likely spread rapidly.
 Outdoor burning is not recommended.
* ADDITIONAL DETAILS...Poor overnight humidity recoveries are
 expected for the duration of the Red Flag Warning. Well above
 average temperatures are also expected which will contribute
 considerably to the dry conditions.