Red Flag Warning
URGENT - FIRE WEATHER MESSAGE
National Weather Service Riverton WY
223 AM MDT Mon Aug 10 2026
WYZ280-281-285-300-102200-
/O.NEW.KRIW.FW.W.0022.260810T1800Z-260811T0300Z/
Natrona County/Casper BLM-Johnson County/Casper BLM-
South Bighorn Mountains-Casper Mountain-
223 AM MDT Mon Aug 10 2026
...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 9 PM MDT THIS
EVENING...
The National Weather Service in Riverton has issued a Red Flag
Warning, which is in effect from noon today to 9 PM MDT this
evening.
* IMPACTS: Low Humidities...Hot Temperatures...Strong Gusty
Winds...and Dry Thunderstorms with gusty and erratic outflow
winds could cause erratic fire behavior.
* AFFECTED AREA:
In Central WY Fire Zones...280...285...300.
In North Central WY Fire Zone....281.
* COUNTIES AFFECTED:
In Central WY...Fremont...Natrona.
In North Central WY...Hot Springs...Johnson...Washakie.
* WIND: West 10 to 20 mph with gusts up to 30 mph.
* THUNDERSTORMS: Will have the best chances in zones 280, 289 and
300. Wind gusts up to 55 mph will be possible from outflows.
* HUMIDITY: As low as 10 percent.
* TEMPERATURES: Highs in the lower 90s; highs in the 80s in zones
285 and 300.
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.
&&
$$
URGENT - FIRE WEATHER MESSAGE
National Weather Service Riverton WY
223 AM MDT Mon Aug 10 2026
WYZ283-287-289-102200-
/O.NEW.KRIW.FW.W.0022.260810T1800Z-260811T0300Z/
Upper Wind River Basin/Wind River Basin-Owl Creek Mountains-
Granite/Green/Ferris/Rattlesnake Mountains-
223 AM MDT Mon Aug 10 2026
...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 9 PM MDT THIS
EVENING...
The National Weather Service in Riverton has issued a Red Flag
Warning, which is in effect from noon today to 9 PM MDT this
evening.
* IMPACTS: Low Humidities...Hot Temperatures...Strong Gusty
Winds...and Dry Thunderstorms with gusty and erratic outflow
winds could cause erratic fire behavior.
* AFFECTED AREA:
In Central WY Fire Zones...283...289.
In North Central WY Fire Zone....287.
* COUNTIES AFFECTED:
In Central WY...Fremont...Natrona.
In North Central WY...Hot Springs.
In Southwest WY...Sweetwater.
* WIND: West 10 to 20 mph with gusts up to 30 mph.
* THUNDERSTORMS: Wind gusts up to 55 mph will be possible from
outflows.
* HUMIDITY: As low as 11 percent.
* TEMPERATURES: Highs in the middle 90s; Highs around 90 in zone
287.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Red Flag Warning means that critical fire weather conditions are
either occurring now....or will shortly. A combination of strong
winds...low relative humidity...and warm temperatures can
contribute to extreme fire behavior.
&&
$$
URGENT - FIRE WEATHER MESSAGE
National Weather Service Riverton WY
223 AM MDT Mon Aug 10 2026
WYZ286-102200-
/O.NEW.KRIW.FW.W.0022.260810T1800Z-260811T0300Z/
Absaroka Mountains/North Shoshone NF-
223 AM MDT Mon Aug 10 2026
...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 9 PM MDT THIS
EVENING...
The National Weather Service in Riverton has issued a Red Flag
Warning, which is in effect from noon today to 9 PM MDT this
evening.
* IMPACTS: Low Humidities...Hot Temperatures...Strong Gusty
Winds...and Dry Thunderstorms with gusty and erratic outflow
winds could cause erratic fire behavior.
* AFFECTED AREA:
In Northwest WY...Fire Weather Zone 286.
* COUNTIES AFFECTED:
In Central WY...Fremont.
In North Central WY...Hot Springs...Park.
* WIND: West 10 to 20 mph with gusts up to 35 mph.
* THUNDERSTORMS: There is a 20 to 30% chance for virga showers/dry
thunderstorms between 1500 and 2000. Wind gusts up to 55 mph will
be possible from outflows.
* HUMIDITY: As low as 15 percent.
* TEMPERATURES: Highs in the upper 70s.
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.
&&
$$
URGENT - FIRE WEATHER MESSAGE
National Weather Service Riverton WY
223 AM MDT Mon Aug 10 2026
WYZ277>279-102200-
/O.NEW.KRIW.FW.W.0022.260810T1800Z-260811T0300Z/
Lincoln and Uinta Counties/Lower Elevations-
Upper Green River Basin/Rock Springs BLM-
Sweetwater County/Rock Springs BLM/Flaming Gorge NRA-
223 AM MDT Mon Aug 10 2026
...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 9 PM MDT THIS
EVENING...
The National Weather Service in Riverton has issued a Red Flag
Warning, which is in effect from noon today to 9 PM MDT this
evening.
* IMPACTS: Low Humidities...Hot Temperatures...Strong Gusty
Winds...and Dry Thunderstorms with gusty and erratic outflow
winds could cause erratic fire behavior.
* AFFECTED AREA:
In Southwest WY Fire Zones...277...279.
In West Central WY Fire Zone....278.
* COUNTIES AFFECTED:
In Southwest WY...Sweetwater...Uinta.
In West Central WY...Lincoln...Sublette.
* WIND: West 10 to 20 mph with gusts up to 30 mph.
* THUNDERSTORMS: Wind gusts up to 55 mph will be possible from
outflows.
* HUMIDITY: As low as 15 percent.
* TEMPERATURES: Highs in the middle 80s to near 90 degrees.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Red Flag Warning means that critical fire weather conditions are
either occurring now....or will shortly. A combination of strong
winds...low relative humidity...and warm temperatures can
contribute to extreme fire behavior.
&&
$$
http://weather.gov/riverton
URGENT - FIRE WEATHER MESSAGE
National Weather Service Pocatello ID
202 AM MDT Mon Aug 10 2026
IDZ410-425-110300-
/O.CON.KPIH.FW.W.0020.260810T2000Z-260811T0300Z/
Upper Snake River Valley/Idaho Falls BLM-
Middle Snake River Valley/Twin Falls BLM north of the Snake River-
202 AM MDT Mon Aug 10 2026
...RED FLAG WARNING REMAINS IN EFFECT FROM 2 PM THIS AFTERNOON TO
9 PM MDT THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY
FOR IDAHO FIRE WEATHER ZONES 410 AND 425...
* AFFECTED AREA...Fire Weather Zone 410 Upper Snake River
Valley/Idaho Falls BLM and Fire Weather Zone 425 Middle Snake
River Valley/Twin Falls BLM north of the Snake River.
* WIND...West 15 to 25 mph with gusts up to 35 mph.
* HUMIDITY...As low as 8 percent.
* IMPACTS...Wind reaching these speeds and humidity drier than
15 percent can result in rapid fire spread and extreme
wildfire intensity.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly based on these criteria
for Southeastern Idaho:
- Relative humidity at or below 15 percent and wind gusts of at
least 25 mph in the mountains, or 30 mph in the Snake Plain.
- Thunderstorm coverage of 25 percent, without specific rainfall
criteria.
- Other high impact events deemed critical by the National
Weather Service and area fire management agencies.
&&
$$
URGENT - FIRE WEATHER MESSAGE
National Weather Service Rapid City SD
114 AM MDT Mon Aug 10 2026
...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 9 PM MDT THIS
EVENING DUE TO GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FALL RIVER
COUNTY AREA, NORTHERN CAMPBELL, SOUTHERN CAMPBELL, CROOK COUNTY
PLAINS, AND WESTON COUNTY PLAINS...
SDZ322-WYZ314>317-101915-
/O.NEW.KUNR.FW.W.0034.260810T1800Z-260811T0300Z/
Fall River County Area-Northern Campbell-Southern Campbell-Crook
County Plains-Weston County Plains-
114 AM MDT Mon Aug 10 2026
...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 9 PM MDT THIS
EVENING...
The National Weather Service in Rapid City SD has issued a Red Flag
Warning.
* AFFECTED AREA...Fire Weather Zones 314, 315, 316, 317, and 322.
* TIMING...From noon today to 9 PM MDT this evening.
* WINDS...Northwest winds 10 to 15 mph with gusts up to 30 mph.
* RELATIVE HUMIDITY...Relative Humidity as low as 10%.
* IMPACTS...Any fires that develop will spread rapidly. Outdoor
burning is not recommended.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Red Flag Warning means that critical fire weather conditions are
either occurring now, or will shortly. A combination of strong winds,
low relative humidity, and warm temperatures can contribute to
extreme fire behavior.
&&
$$
Wong
URGENT - FIRE WEATHER MESSAGE
National Weather Service Cheyenne WY
103 AM MDT Mon Aug 10 2026
WYZ417>427-110300-
/O.NEW.KCYS.FW.W.0037.260810T1800Z-260811T0300Z/
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-
103 AM MDT Mon Aug 10 2026
...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 9 PM MDT THIS
EVENING FOR GUSTY WINDS, LOW RH, AND DRY LIGHTNING FOR FIRE
WEATHER ZONES 417, 418, 419, 420, 421, 422, 423, 424, 425, 426,
AND 427...
The National Weather Service in Cheyenne has issued a Red Flag
Warning, which is in effect from noon today to 9 PM MDT this
evening.
* AFFECTED AREA...Fire weather zones 417 through 427.
* WIND...West to northwest at 10 to 20 mph with gusts up to 35
mph.
* HUMIDITY...Between 9 and 18 percent.
* 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.
* IMPACTS...any fires that develop will likely 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.
&&
$$
