Hazard Report Provided By forecast.weather.gov

Hazardous Weather Outlook
National Weather Service Riverton WY
440 AM MDT Tue Apr 21 2026

WYZ001>020-022>030-221300-
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-
440 AM MDT Tue Apr 21 2026

...Fire Weather Watch in effect for locations east of the Continental
Divide on Wednesday...

...Winter Weather Advisory in effect for the western mountains
Wednesday afternoon through Thursday evening...

This Hazardous Weather Outlook is for Western and Central Wyoming.

.DAY ONE...Today and tonight.

Elevated to critical fire weather conditions are expected for most
of the area this afternoon.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Wednesday...Strong wind and low humidity ahead of a cold front will
lead to widespread critical fire weather conditions.

Wednesday through Friday...An incoming system will bring cooler
temperatures, rain, and mountain snow to the area. Accumulating
mountain snow will lead to travel impacts over passes.

.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
1203 PM MDT Tue Apr 21 2026

WYZ275-276-280>283-285-287-289-300-221300-
/O.CON.KRIW.FW.A.0005.260422T1500Z-260423T0200Z/
North Bighorn Basin/Worland BLM-Cody Foothills-
Natrona County/Casper BLM-Johnson County/Casper BLM-
South Bighorn Basin/Worland BLM-
Upper Wind River Basin/Wind River Basin-South Bighorn Mountains-
Owl Creek Mountains-Granite/Green/Ferris/Rattlesnake Mountains-
Casper Mountain-
1203 PM MDT Tue Apr 21 2026

...FIRE WEATHER WATCH REMAINS IN EFFECT FROM WEDNESDAY MORNING
THROUGH WEDNESDAY EVENING...

* AFFECTED AREA:
  In Central WY Fire Zones...280...283...285...289...300.
  In North Central WY Fire Zones...275...276...281...282...287.

* COUNTIES AFFECTED:
  In Central WY...Fremont...Natrona.
  In North Central WY...Big Horn...Hot Springs...Johnson...Park
                        Washakie.
  In Southwest WY...Sweetwater.

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

* WIND: Southwest 25 to 35 mph with gusts up to 55 mph.

* HUMIDITY: As low as 10 to 15 percent.

* ADDITIONAL DETAILS: While wind will not be as strong as on
  Wednesday, elevated to near critical fire weather conditions will
  be seen today across much of the same area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Fire Weather Watch means that critical fire weather conditions
are forecast to occur. Listen for later forecasts and possible Red
Flag Warnings.

&&

$$

http://weather.gov/riverton

Hazard Report Provided By forecast.weather.gov