Cheyenne, Wyoming

Regional Weather Alerts


     

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; Sierra Madre Range/Medicine Bow NF; Upper North Platte River Basin; Snowy Range/Medicine Bow NF; 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: 2026-08-08 @ 4:41 pm -> 2026-08-09 @ 7:00 am
Onset: 2026-08-08 @ 4:41 pm -> 2026-08-09 @ 10:00 pm
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Cheyenne WY on 2026-08-08 @ 4:41 pm
Headline: Red Flag Warning issued August 8 at 3:41PM MDT until August 9 at 9:00PM MDT by NWS Cheyenne WY
Description: * AFFECTED AREA...Fire weather zones 417 through 433.

* WIND...Saturday west to northwest winds from 15 to 25 mph
with gusts up to 40 mph. Overnight, lighter variable winds of
5 to 10 mph. Sunday west to northwest winds from 15 to 25 mph
with gusts up to 40 mph west of I-25, with winds turning
southerly to easterly east of I-25.

* HUMIDITY...Daytime minimum RH between 5 and 10 percent on
Saturday, and between 8 and 12 percent on Sunday. Overnight
recoveries of 20 to 40 percent along and west of Interstate
25 and 40 to 60 percent in Niobrara and Goshen Counties.

* ADDITIONAL DETAILS...Isolated high-based showers will have
the potential to produce gusty and erratic winds along with a
few strikes of lightning without much, if any, rainfall
during the afternoon and evening hours both Saturday and
Sunday.

* IMPACTS...Any fires that develop will likely spread rapidly.
Outdoor burning is not recommended.

Alert: Special Weather Statement
Area(s): South Laramie Range; South Laramie Range Foothills
Effective: 2026-08-08 @ 4:15 pm -> 2026-08-08 @ 4:45 pm
Onset: 2026-08-08 @ 4:15 pm
Severity: Moderate
Certainty: Observed
Urgency: Expected
Issued By: NWS Cheyenne WY on 2026-08-08 @ 4:15 pm
Headline: Special Weather Statement issued August 8 at 3:15PM MDT by NWS Cheyenne WY
Description: At 314 PM MDT, Doppler radar was tracking a strong thunderstorm over
Vedauwoo Campground, or 16 miles southeast of Laramie, moving east at
30 mph.

HAZARD...Wind gusts of 50 to 55 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.

Locations impacted include...
Happy Valley, Willadsen Estates, Granite Canon, Granite Springs
Reservoir, Crystal Lake Reservoir, Curt Gowdy State Park, Pine Grove
Estates, Vedauwoo Campground, Granite Springs Retreat, Vedauwoo,
Buford, and Cheyenne Pass.

This includes Interstate 80 in Wyoming between mile markers 329 and
330, near mile marker 332, and between mile markers 335 and 347.

Alert: Red Flag Warning
Area(s): Gallatin National Forest; Wheatland County/Sweet Grass County; Stillwater County; Beartooth Ranger District Custer National Forest; Golden Valley County/Musselshell County; Yellowstone County; Crow Indian Reservation/Big Horn Canyon Rec Area; Northern Rosebud/Northern Treasure Counties; Northern Cheyenne Indian Reservation/Ashland Ranger District Custer Natl Forest; Custer County; Sioux Ranger District Custer National Forest; Sheridan County/Casper BLM; Bighorn National Forest
Effective: 2026-08-08 @ 3:47 pm -> 2026-08-08 @ 10:00 pm
Onset: 2026-08-08 @ 3:47 pm -> 2026-08-08 @ 10:00 pm
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Billings MT on 2026-08-08 @ 3:47 pm
Headline: Red Flag Warning issued August 8 at 2:47PM MDT until August 8 at 9:00PM MDT by NWS Billings MT
Description: * IMPACTS: Low humidities, hot temperatures, and strong gusty winds
will create erratic fire behavior.

* AFFECTED AREA:
In North Central WY Fire Zones...274...284.
In South Central MT Fire Zones...123...124...125...126...127
128...129.
In Southeast MT Fire Zones...130...131...132.
In Southeast MT and Northwest SD Fire Zone...133.

* COUNTIES AFFECTED:
In Central MT...Golden Valley...Musselshell...Wheatland.
In North Central WY...Big Horn...Johnson...Sheridan...Washakie.
In Northwest SD...Harding.
In South Central MT...Big Horn...Carbon...Park...Stillwater
Sweet Grass...Yellowstone.
In Southeast MT...Carter...Custer...Fallon...Powder River
Rosebud...Treasure.
In Southwest MT...Gallatin.

* WIND: Northwest 10 to 20 mph with gusts up to 30 mph.

* HUMIDITY: Minimums of 6 to 14 percent.

* TEMPERATURES: Highs of 93 to 101 degrees.

Alert: Red Flag Warning
Area(s): Northern Foot Hills; Butte County Area; Northern Campbell; Southern Campbell; Crook County Plains; Weston County Plains; Wyoming Black Hills
Effective: 2026-08-08 @ 12:55 pm -> 2026-08-08 @ 9:00 pm
Onset: 2026-08-08 @ 1:00 pm -> 2026-08-08 @ 9:00 pm
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Rapid City SD on 2026-08-08 @ 12:55 pm
Headline: Red Flag Warning issued August 8 at 11:55AM MDT until August 8 at 8:00PM MDT by NWS Rapid City SD
Description: ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MDT THIS EVENING DUE
TO GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR NORTHERN FOOT HILLS,
BUTTE COUNTY 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, 323,
and 327.

* TIMING...Until 8 PM MDT this evening.

* WINDS...Northwest winds 10 to 20 mph with gusts up to 30 mph.

* RELATIVE HUMIDITY...Relative Humidity between 8 to 15 percent.

* IMPACTS...Any fires that develop will spread rapidly. Outdoor
burning is not recommended.

Alert: Air Quality Alert
Area(s): Yellowstone National Park; Absaroka Mountains; Cody Foothills; North Bighorn Basin; Southwest Bighorn Basin; Southeast Bighorn Basin; Owl Creek and Bridger Mountains; Bighorn Mountains West; Bighorn Mountains Southeast; Northeast Johnson County; Southeast Johnson County; Teton and Gros Ventre Mountains; Jackson Hole; Wind River Mountains West; Wind River Mountains East; Upper Wind River Basin; Wind River Basin; Lander Foothills; Green Mountains and Rattlesnake Range; Natrona County Lower Elevations; Casper Mountain; Star Valley; Salt River and Wyoming Ranges; Upper Green River Basin Foothills; Upper Green River Basin; South Lincoln County; Rock Springs and Green River; Flaming Gorge; East Sweetwater County
Effective: 2026-08-08 @ 12:39 pm -> 2026-08-10 @ 1:00 pm
Onset: 2026-08-08 @ 12:39 pm
Severity: Unknown
Certainty: Unknown
Urgency: Unknown
Issued By: NWS Riverton WY on 2026-08-08 @ 12:39 pm
Headline: Air Quality Alert issued August 8 at 11:39AM MDT by NWS Riverton WY
Description: The following message is transmitted on behalf of the Wyoming
Department of Environmental Quality, Air Quality Division, and the
Wyoming Department of Health.

* WHAT...Air Quality Alert for Wildfire Smoke.

* WHERE...All of Western and Central Wyoming

* WHEN...Now through Noon Monday.

* IMPACTS...Smoke from western United States wildfires continues to
be observed across much of western and central Wyoming. The smoke
is limiting visibilities at times.

HEALTH INFORMATION...The Wyoming Department of Health recommends
that the elderly, young children, and individuals with respiratory
problems avoid excessive physical exertion and minimize outdoor
activities during this time. Wildfire smoke is made up of a variety
of pollutants, including particulate matter and ozone, which can
cause respiratory health effects. Although these people are most
susceptible to health impacts, the Department of Health also advises
that everyone should avoid prolonged exposure to poor air quality
conditions.

CURRENT CONDITIONS...The Wyoming Department of Environmental
Quality, Air Quality Division offers near real-time air quality data
for Wyoming's monitoring stations and health effects information to
help the public interpret current conditions. Current air quality
conditions across the state of Wyoming can be found at
http://www.wyvisnet.com/.

Alert: Red Flag Warning
Area(s): Yellowstone National Park; North Bighorn Basin/Worland BLM; Cody Foothills; Lincoln and Uinta Counties/Lower Elevations; Upper Green River Basin/Rock Springs BLM; Sweetwater County/Rock Springs BLM/Flaming Gorge NRA; Natrona County/Casper BLM; Johnson County/Casper BLM; South Bighorn Basin/Worland BLM; Upper Wind River Basin/Wind River Basin; South Bighorn Mountains; Absaroka Mountains/North Shoshone NF; Owl Creek Mountains; East Wind River Mountains/South Shoshone NF; Granite/Green/Ferris/Rattlesnake Mountains; Casper Mountain
Effective: 2026-08-08 @ 12:37 pm -> 2026-08-09 @ 7:00 am
Onset: 2026-08-08 @ 12:37 pm -> 2026-08-09 @ 10:00 pm
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Riverton WY on 2026-08-08 @ 12:37 pm
Headline: Red Flag Warning issued August 8 at 11:37AM MDT until August 9 at 9:00PM MDT by NWS Riverton WY
Description: * AFFECTED AREA:
In Central WY Fire Zones...280...283...285...288...289...300.
In North Central WY Fire Zones...275...276...281...282...287.
In Northwest WY Fire Zones...140...286.
In Southwest WY Fire Zones...277...279.
In West Central WY Fire Zone....278.

* COUNTIES AFFECTED:
In Central WY...Fremont...Natrona.
In North Central WY...Big Horn...Hot Springs...Johnson...Park
Washakie.
In Northwest WY...Yellowstone National Park.
In Southwest WY...Sweetwater...Uinta.
In West Central WY...Lincoln...Sublette.

* IMPACTS: Low Humidities and Strong Gusty Winds could cause
erratic fire behavior.

* WIND: West 10 to 20 mph with gusts up to 35 mph.

* HUMIDITY: As low as 7 percent. Humidity recovery will be poor
tonight.

Alert: Air Quality Alert
Area(s): Northeast Bighorn Mountains; Sheridan Foothills
Effective: 2026-08-07 @ 12:03 pm -> 2026-08-10 @ 1:00 pm
Onset: 2026-08-07 @ 12:03 pm
Severity: Unknown
Certainty: Unknown
Urgency: Unknown
Issued By: NWS Billings MT on 2026-08-07 @ 12:03 pm
Headline: Air Quality Alert issued August 7 at 11:03AM MDT by NWS Billings MT
Description: The following message is transmitted on behalf of the Wyoming
Department of Environmental Quality, Air Quality Division and the
Wyoming Department of Health.

WHAT...Air Quality Alert for Wildfire Smoke.

WHERE...Sheridan County, Wyoming.

WHEN...Through noon Monday.

IMPACTS...Heavy smoke from regional wildfires will continue to
reduce air quality.

HEALTH INFORMATION...The Wyoming Department of Health recommends the
elderly, young children, and individuals with respiratory problems
avoid excessive physical exertion and minimize outdoor activities
during this time. Wildfire smoke is made up of a variety of
pollutants, including particulate matter and ozone, which can cause
respiratory health effects. Although these people are most
susceptible to health impacts, the Department of Health also advises
that everyone should avoid prolonged exposure to poor air quality
conditions.

CURRENT CONDITIONS...The Wyoming Department of Environmental
Quality, Air Quality Division offers near real-time air quality data
for Wyoming's monitoring stations and health effects information to
help the public interpret current conditions. Current air quality
conditions across the state of Wyoming can be found at
http://www.wyvisnet.com/

Alert: Air Quality Alert
Area(s): Southwest Wyoming
Effective: 2026-08-07 @ 11:51 am -> 2026-08-10 @ 1:00 pm
Onset: 2026-08-07 @ 11:51 am
Severity: Unknown
Certainty: Unknown
Urgency: Unknown
Issued By: NWS Salt Lake City UT on 2026-08-07 @ 11:51 am
Headline: Air Quality Alert issued August 7 at 10:51AM MDT by NWS Salt Lake City UT
Description: The following is transmitted in collaboration with the Wyoming
Department of Environmental Quality, Air Quality Division and the
Wyoming Department of Health until noon MDT Monday.

* WHAT...Air Quality Alert for Wildfire Smoke.

* WHERE...Uinta County in southwest Wyoming.

* WHEN...Noon MDT Friday through Noon MDT Monday

* IMPACTS...Heavy smoke from the northwestern United States has been
observed across southwest Wyoming.

HEALTH INFORMATION...The Wyoming Department of Health recommends the
elderly, young children, and individuals with respiratory problems
avoid excessive physical exertion and minimize outdoor activities
during this time. Wildfire smoke is made up of a variety of
pollutants, including particulate matter and ozone, which can cause
respiratory health effects. Although these people are most
susceptible to health impacts, the Department of Health also advises
that everyone should avoid prolonged exposure to poor air quality
conditions.

CURRENT CONDITIONS...The Wyoming Department of Environmental
Quality, Air Quality Division offers near real-time air quality data
for Wyoming's monitoring stations and provides health effects
information to help the public interpret current conditions. Current
air quality conditions across the state of Wyoming can be found at
http://www.wyvisnet.com/

Alert: Air Quality Alert
Area(s): Northern Campbell; Southern Campbell; Western Crook; Wyoming Black Hills; Weston County Plains; Newcastle; Northeastern Crook
Effective: 2026-08-07 @ 11:46 am -> 2026-08-10 @ 1:00 pm
Onset: 2026-08-07 @ 11:46 am
Severity: Unknown
Certainty: Unknown
Urgency: Unknown
Issued By: NWS Rapid City SD on 2026-08-07 @ 11:46 am
Headline: Air Quality Alert issued August 7 at 10:46AM MDT by NWS Rapid City SD
Description: The following message is transmitted in collaboration with the
Wyoming Department of Environmental Quality, Air Quality Division,
and the Wyoming Department of Health.

* WHAT...Air Quality Alert for Wildfire Smoke.

* WHERE...Northeast Wyoming.

* WHEN...Through Noon MDT Monday.

* IMPACTS...Poor air quality due to wildfire smoke.