Hazard Report Provided By forecast.weather.gov

Hazardous Weather Outlook
National Weather Service Riverton WY
518 AM MDT Tue Jul 15 2025

WYZ001>020-022>030-161530-
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-
518 AM MDT Tue Jul 15 2025

This Hazardous Weather Outlook is for Western and Central Wyoming.

.DAY ONE...Today and tonight.

Widespread to numerous thunderstorms are possible this afternoon and
evening, especially east of the Divide. Strong to severe thunderstorms
will be capable of 60 mph winds, 1 inch hail, and periods of heavy
rainfall. West of the Divide, dry thunderstorms capable of gusty
outflows up to 60 mph are possible this afternoon.

A Red Flag Warning is in effect from 12PM to 8PM across Zone 279
where low relative humidity, gusty winds, and dry thunderstorm
potential exists.

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

Wednesday...Chances for afternoon and evening thunderstorms.

Friday through Monday...Isolated afternoon and evening thunderstorm
chances each day.

.SPOTTER INFORMATION STATEMENT...

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

$$

URGENT - FIRE WEATHER MESSAGE
National Weather Service Pocatello ID
106 PM MDT Tue Jul 15 2025

IDZ410-411-413-427-160300-
/O.CON.KPIH.FW.W.0005.000000T0000Z-250716T0300Z/
Upper Snake River Valley/Idaho Falls BLM-
Centennial Mountains and Snake River Range/Targhee NF-
Caribou Range/Caribou NF-
Goose Creek and Raft River Valley/Southern Sawtooth NF/Twin Falls
BLM south of the Snake River-
106 PM MDT Tue Jul 15 2025

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING
FOR SCATTERED THUNDERSTORMS FOR FIRE WEATHER ZONES 410, 411, 413,
AND 427...

* AFFECTED AREA...Fire Weather Zone 410 Upper Snake River
  Valley/Idaho Falls BLM, Fire Weather Zone 411 Centennial
  Mountains and Snake River Range/Targhee NF, Fire Weather Zone
  413 Caribou Range/Caribou NF and Fire Weather Zone 427 Goose
  Creek and Raft River Valley/Southern Sawtooth NF/Twin Falls
  BLM south of the Snake River.

* TIMING...Scattered thunderstorms are expected to develop
  during the afternoon and evening hours, supporting the
  potential for gusty outflow winds and frequent lightning.

* WINDS...A dry low level environment will promote the potential
  for storms to produce gusty outflow wind gusts in excess of 40-
   50 mph, locally higher up to around 60 mph.

* RELATIVE HUMIDITY...As low as 15 to 25 percent.

* THUNDERSTORMS...25 to 45 percent coverage expected.

* IMPACTS...Critical fire weather conditions are expected today.
  Lightning may generate new fire starts. Any new fire starts or
  existing fires may spread rapidly.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly based on these criteria
for Southeastern Idaho:

- Relative humidity at or below 15 percent and wind gusts of at
least 25 mph in the mountains, or 30 mph in the Snake Plain.

- Thunderstorm coverage of 25 percent, without specific rainfall
criteria.

&&

$$

Hazard Report Provided By forecast.weather.gov