Red Flag Warning
URGENT - FIRE WEATHER MESSAGE
National Weather Service Riverton WY
1112 AM MDT Thu Sep 3 2026
WYZ275-276-280>283-285>287-289-041300-
/O.NEW.KRIW.FW.W.0025.260904T1800Z-260905T0300Z/
/O.CON.KRIW.FW.W.0024.260903T1800Z-260904T0300Z/
North Bighorn Basin/Worland BLM-Cody Foothills-
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-
Granite/Green/Ferris/Rattlesnake Mountains-
1112 AM MDT Thu Sep 3 2026
...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS
EVENING...
...RED FLAG WARNING IN EFFECT FROM NOON TO 9 PM MDT FRIDAY...
The National Weather Service in Riverton has issued a Red Flag
Warning, which is in effect from noon to 9 PM MDT Friday.
* IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and
Strong Gusty Winds could cause erratic fire behavior.
* AFFECTED AREA:
In Central WY Fire Zones...280...283...285...289.
In North Central WY Fire Zones...275...276...281...282...287.
In Northwest WY Fire Zone....286.
* COUNTIES AFFECTED:
In Central WY...Fremont...Natrona.
In North Central WY...Big Horn...Hot Springs...Johnson...Park
Washakie.
In Southwest WY...Sweetwater.
* WIND: Southwest 15 to 25 mph with gusts up to 30 to 40 mph.
* HUMIDITY: As low as 10 to 15 percent.
* TEMPERATURES: Highs in the 80s. Lows in the 50s.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Red Flag Warning means that critical fire weather conditions are
either occurring now....or will shortly. A combination of strong
winds...low relative humidity...and warm temperatures can
contribute to extreme fire behavior.
&&
$$
URGENT - FIRE WEATHER MESSAGE
National Weather Service Rapid City SD
919 PM MDT Thu Sep 3 2026
...RED FLAG WARNING IN EFFECT FROM 11 AM TO 8 PM MDT FRIDAY DUE TO
GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR BUTTE COUNTY AREA, NORTHERN
CAMPBELL, SOUTHERN CAMPBELL, CROOK COUNTY PLAINS, WESTON COUNTY
PLAINS, AND WYOMING BLACK HILLS...
SDZ327-WYZ314>318-041530-
/O.NEW.KUNR.FW.W.0036.260904T1700Z-260905T0200Z/
Butte County Area-Northern Campbell-Southern Campbell-Crook
County Plains-Weston County Plains-Wyoming Black Hills-
919 PM MDT Thu Sep 3 2026
...RED FLAG WARNING IN EFFECT FROM 11 AM TO 8 PM MDT FRIDAY...
The National Weather Service in Rapid City SD has issued a Red Flag
Warning.
* AFFECTED AREA...Fire Weather Zones 314, 315, 316, 317, 318, and
327.
* TIMING...From 11 AM to 8 PM MDT Friday.
* WINDS...South winds 10 to 20 mph with gusts up to 30 mph.
* RELATIVE HUMIDITY...Relative Humidity as low as 8 percent.
* IMPACTS...Any fires that develop will spread rapidly. Outdoor
burning is not recommended.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Red Flag Warning means that critical fire weather conditions are
either occurring now, or will shortly. A combination of strong winds,
low relative humidity, and warm temperatures can contribute to
extreme fire behavior.
&&
$$
SE
URGENT - FIRE WEATHER MESSAGE
National Weather Service Billings MT
917 PM MDT Thu Sep 3 2026
MTZ131>133-WYZ274-050300-
/O.CON.KBYZ.FW.W.0011.260904T1500Z-260905T0300Z/
Northern Cheyenne Indian Reservation/Ashland Ranger District
Custer Natl Forest-Custer County-
Sioux Ranger District Custer National Forest-Sheridan County-
917 PM MDT Thu Sep 3 2026
...RED FLAG WARNING REMAINS IN EFFECT FROM 9 AM TO 9 PM MDT
FRIDAY...
* IMPACTS: Low humidities, unseasonably warm temperatures, and
strong gusty winds will create erratic fire behavior.
* AFFECTED AREA:
In North Central WY Fire Zone...274.
In Southeast MT Fire Zones...131...132.
In Southeast MT and Northwest SD Fire Zone...133.
* COUNTIES AFFECTED:
In North Central WY...Sheridan.
In Northwest SD...Harding.
In South Central MT...Big Horn.
In Southeast MT...Carter...Custer...Fallon...Powder River
Rosebud...Treasure.
* WIND: South 10 to 20 mph with gusts 25 to 35 mph.
* HUMIDITY: As low as 10 percent.
* TEMPERATURES: Up to 98.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Red Flag Warning means that critical fire weather conditions are
either occurring now, or will shortly. A combination of strong
winds, low relative humidity, and warm temperatures can contribute
to extreme fire behavior.
&&
$$
http://weather.gov/Billings
URGENT - FIRE WEATHER MESSAGE
National Weather Service Billings MT
917 PM MDT Thu Sep 3 2026
MTZ129-WYZ284-050300-
/O.EXP.KBYZ.FW.W.0010.000000T0000Z-260904T0300Z/
/O.CON.KBYZ.FW.W.0011.260904T1500Z-260905T0300Z/
Crow Indian Reservation/Bighorn Canyon Rec Area-
Bighorn National Forest-
917 PM MDT Thu Sep 3 2026
...RED FLAG WARNING REMAINS IN EFFECT FROM 9 AM TO 9 PM MDT
FRIDAY...
...RED FLAG WARNING TODAY HAS EXPIRED...
* IMPACTS: Low humidities, unseasonably warm temperatures, and
strong gusty winds will create erratic fire behavior.
* AFFECTED AREA:
In North Central WY Fire Zone...284.
In South Central MT Fire Zone...129.
* COUNTIES AFFECTED:
In North Central WY...Big Horn...Johnson...Sheridan...Washakie.
In South Central MT...Big Horn...Carbon...Yellowstone.
* WIND: South 10 to 20 mph with gusts 25 to 35 mph.
* HUMIDITY: As low as 10 percent.
* ADDITIONAL DETAILS: The worst conditions are expected across
the lower elevations.
* TEMPERATURES: Up to 96.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Red Flag Warning means that critical fire weather conditions are
either occurring now, or will shortly. A combination of strong
winds, low relative humidity, and warm temperatures can contribute
to extreme fire behavior.
&&
$$
