950
WWUS85 KRIW 140159
RFWRIW

URGENT - FIRE WEATHER MESSAGE
National Weather Service Riverton WY
759 PM MDT Wed Aug 13 2025

WYZ283-140300-
/O.EXP.KRIW.FW.W.0010.000000T0000Z-250814T0200Z/
Upper Wind River Basin/Wind River Basin-
759 PM MDT Wed Aug 13 2025

...RED FLAG WARNING WILL EXPIRE AT 8 PM MDT THIS EVENING...

Wind speeds have diminished below critical thresholds. Therefore,
the warning will expire at 8 PM Wednesday.

$$

WYZ140-150200-
/O.EXB.KRIW.FW.W.0010.250814T0200Z-250815T0200Z/
Yellowstone National Park-
759 PM MDT Wed Aug 13 2025

...RED FLAG WARNING IN EFFECT UNTIL 8 PM MDT THURSDAY...

The National Weather Service in Riverton has issued a Red Flag
Warning, which is in effect until 8 PM MDT Thursday.

* IMPACTS: Low Humidity...Above Normal Temperatures...and Gusty
  West Winds could cause erratic fire behavior.

* AFFECTED AREA:
  In Northwest WY...Fire Weather Zone 140.

* COUNTIES AFFECTED:
  In Northwest WY...Yellowstone National Park.

* WIND: West 10 to 20 mph with gusts up to 30 mph.

* HUMIDITY: 16 to 20 percent.

* TEMPERATURES: Highs 74 to 79.

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.

&&

$$

WYZ277-278-286-288-414>416-150200-
/O.EXT.KRIW.FW.W.0010.000000T0000Z-250815T0200Z/
Lincoln and Uinta Counties/Lower Elevations-
Upper Green River Basin/Rock Springs BLM-
Absaroka Mountains/North Shoshone NF-
East Wind River Mountains/South Shoshone NF-
Salt and Wyoming Ranges/West Zone Bridger Teton NF-
North Zone Bridger Teton NF and Grand Teton NP-
West Wind River Mountains/East Zone Bridger Teton NF-
759 PM MDT Wed Aug 13 2025

...RED FLAG WARNING NOW IN EFFECT UNTIL 8 PM MDT THURSDAY...

* AFFECTED AREA:
  In Central WY Fire Zone....288.
  In Northwest WY Fire Zones...286...415.
  In Southwest WY Fire Zone....277.
  In West Central WY Fire Zones...278...414...416.

* COUNTIES AFFECTED:
  In Central WY...Fremont.
  In North Central WY...Hot Springs...Park.
  In Southwest WY...Sweetwater...Teton...Uinta.
  In West Central WY...Lincoln...Sublette.

* IMPACTS: Low Humidities...Above Normal Temperatures...and Gusty
  West Winds could cause erratic fire behavior.

* WIND: West 10 to 20 mph with gusts up to 30 mph.

* HUMIDITY: 14 to 19 percent.

* TEMPERATURES:
  Highs 74 to 79 in Zones 286, 288, 414, 415, and 416.
  Highs 83 to 88 in Zones 277 and 278.

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.

&&

$$

WYZ279-280-289-300-150200-
/O.CON.KRIW.FW.W.0010.000000T0000Z-250815T0200Z/
Sweetwater County/Rock Springs BLM/Flaming Gorge NRA-
Natrona County/Casper BLM-
Granite/Green/Ferris/Rattlesnake Mountains-Casper Mountain-
759 PM MDT Wed Aug 13 2025

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MDT THURSDAY...

* 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.

* IMPACTS: Low Humidities...Above Normal Temperatures...and Gusty
  West Winds could cause erratic fire behavior.

* WIND: West 10 to 20 mph with gusts up to 30 mph.

* HUMIDITY: 11 to 15 percent.

* TEMPERATURES: Highs 83 to 88, except 90 to 95 in Zone 280.

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