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Severe · Red Flag WarningActive alert

Red Flag Warning issued October 4 at 11:31AM MDT until October 5

Affecting Sweetwater County/Rock Springs BLM/Flaming Gorge NRA; Natrona County/Casper BLM; Granite/Green/Ferris/Rattlesnake Mountains; Casper Mountain

In effect until: Oct 5, 2026, 11:45 AM

Sweetwater County/Rock Springs BLM/Flaming Gorge NRA; Natrona County/Casper BLM; Granite/Green/Ferris/Rattlesnake Mountains; Casper Mountain

Likely impact; effects through 11:45 AM.

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.

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Read the original bulletin (official text)
The National Weather Service in Riverton has issued a Red Flag
Warning, which is in effect from noon to 6 PM MDT Monday. the Fire
Weather Watch is no longer in effect.

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

* AFFECTED AREA:
In Central WY Fire Zones...280...289...300.
In Southwest WY Fire Zone....279.

* COUNTIES AFFECTED:
In Central WY...Fremont...Natrona.
In Southwest WY...Sweetwater.

* WIND: West 10 to 15 mph with gusts of 30 to 35 mph.

* HUMIDITY: As low as 10 percent.

* TEMPERATURES: Highs in the low to mid 80s.
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Alert data: U.S. National Weather Service / NOAA · Translation: WeatherTranslate™