Hazard Report Provided By forecast.weather.gov

Hazardous Weather Outlook
National Weather Service Riverton WY
149 AM MDT Thu Aug 14 2025

WYZ001>020-022>030-151300-
Yellowstone National Park-Absaroka Mountains-Cody Foothills-
North Bighorn Basin-Southwest Bighorn Basin-Southeast Bighorn Basin-
Owl Creek and Bridger Mountains-Bighorn Mountains West-
Bighorn Mountains Southeast-Northeast Johnson County-
Southeast Johnson County-Teton and Gros Ventre Mountains-
Jackson Hole-Wind River Mountains West-Wind River Mountains East-
Upper Wind River Basin-Wind River Basin-Lander Foothills-
Green Mountains and Rattlesnake Range-
Natrona County Lower Elevations-Casper Mountain-Star Valley-
Salt River and Wyoming Ranges-Upper Green River Basin Foothills-
Upper Green River Basin-South Lincoln County-
Rock Springs and Green River-Flaming Gorge-East Sweetwater County-
149 AM MDT Thu Aug 14 2025

This Hazardous Weather Outlook is for Western and Central Wyoming.

.DAY ONE...Today and Tonight.

Critical fire weather conditions occur across most of western and
southern Wyoming due to low relative humidity, above normal
temperatures, and gusty west wind. Please see Red Flag Warnings for
details. Isolated to scattered showers and thunderstorms will be
capable of producing gusty outflow wind of 35 to 45 mph.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Friday through Sunday...A chance of afternoon and evening
thunderstorms each day, with Friday looking to have the greatest
coverage. Gusty outflow wind will again be the primary hazard.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures.

$$

URGENT - FIRE WEATHER MESSAGE
National Weather Service Riverton WY
103 PM MDT Thu Aug 14 2025

WYZ140-286-288-414>416-150200-
/O.CON.KRIW.FW.W.0010.000000T0000Z-250815T0200Z/
Yellowstone National Park-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-
103 PM MDT Thu Aug 14 2025

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MDT THIS
EVENING...

* IMPACTS: Low Humidities...Very Dry Fuels...Warm Temperatures...
  Strong Gusty Winds...Dry Thunderstorms and outflow winds...and
  Increasing Thunderstorm Activity could cause erratic fire
  behavior.

* AFFECTED AREA:
  In Central WY Fire Zone....288.
  In Northwest WY Fire Zones...140...286...415.
  In West Central WY Fire Zones...414...416.

* COUNTIES AFFECTED:
  In Central WY...Fremont.
  In North Central WY...Hot Springs...Park.
  In Northwest WY...Yellowstone National Park.
  In West Central WY...Lincoln...Sublette...Teton.

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

* THUNDERSTORMS: There is a 20 to 40 percent chance of
  thunderstorms, with gusty winds and frequent lightning being the
  main threats.

* HUMIDITY: Higher elevations will see RHs around 20 percent,
  however lower valleys will see RHs around 15 percent.

* TEMPERATURES: Highs in the mid 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.

&&

$$

http://weather.gov/riverton

Hazard Report Provided By forecast.weather.gov