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.