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Severe · Red Flag WarningActive alert

Red Flag Warning issued September 9 at 2:08AM MDT until September 10

Affecting Natrona County/Casper BLM; Granite/Green/Ferris/Rattlesnake Mountains; Casper Mountain

In effect until: Sep 9, 2026, 11:00 PM

Natrona County/Casper BLM; Granite/Green/Ferris/Rattlesnake Mountains; Casper Mountain

Likely impact; effects through 11:00 PM.

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)
* IMPACTS: Low Humidities 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 10 to 15 mph with gusts up to 25 mph. Thursday, west
to southwest 15 to 20 mph with gusts up to 40 mph.

* HUMIDITY: As low as 8 percent. Thursday, as low as 6 percent. RH
recovery will be poor tonight.
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Alert data: U.S. National Weather Service / NOAA · Translation: WeatherTranslate™