Casper, Wyoming Weather:
Active Weather Warnings
Friday, March 20, 2026
Cloudy Weather
Day 82°
Night 46°
Precipitation 1 %
Wind 16 mph
UV Index (0 - 11+) 5

Weather Alerts and Warnings for

Severe Future Possible

Fire Weather Watch

Fire Weather Watch issued March 17 at 2:23AM MDT until March 21 at 9:00PM MDT by NWS Riverton WY
Mar 18, 12:00 PM Mar 21, 9:00 PM
The National Weather Service in Riverton has issued a Fire Weather
Watch, which is in effect from Wednesday afternoon through
Saturday evening.

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

* AFFECTED AREA:
In Central WY Fire Zones...280...289.
In North Central WY Fire Zone....281.

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

* WIND: West 15 to 25 mph with gusts up to 40 mph. The strongest
wind is expected on Wednesday and Saturday.

* HUMIDITY: 10 to 15 percent.

* TEMPERATURES: Highs in the 70s Wednesday. Lows in 70s to around
80 Thursday through Saturday.
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A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings.
Updated: Mar 17, 12:42 PM Source: NWS Alert
Severe Expected Likely

Red Flag Warning

Red Flag Warning issued March 18 at 1:55AM MDT until March 21 at 9:00PM MDT by NWS Riverton WY
Mar 18, 12:00 PM Mar 21, 9:00 PM
* IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and
Strong Gusty Winds could cause erratic fire behavior.

* AFFECTED AREA:
In Central WY Fire Zones...280...289.
In North Central WY Fire Zone....281.

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

* WIND: West 20 to 30 mph with gusts up to 45 mph today and
Saturday; 15 to 25 mph with gusts to 35 mph Thursday and Friday.

* HUMIDITY: 10 to 15 percent.

* TEMPERATURES: Highs 70 to 75 today, 75 to 80 Thursday through
Saturday.
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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.
Updated: Mar 18, 6:30 AM Source: NWS Alert