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WWUS85 KRIW 171835
SPSRIW

Special Weather Statement
National Weather Service Riverton WY
1235 PM MDT Sun Aug 17 2025

WYZ001-003>006-010-011-013-016>020-022-023-025>030-180200-
Yellowstone National Park-Cody Foothills-North Bighorn Basin-
Southwest Bighorn Basin-Southeast Bighorn Basin-
Northeast Johnson County-Southeast Johnson County-Jackson Hole-
Upper Wind River Basin-Wind River Basin-Lander Foothills-
Green Mountains and Rattlesnake Range-
Natrona County Lower Elevations-Casper Mountain-Star Valley-
Upper Green River Basin Foothills-Upper Green River Basin-
South Lincoln County-Rock Springs and Green River-Flaming Gorge-
East Sweetwater County-
Including the cities of Lake, Mammoth, Old Faithful, Clark, Cody,
Meeteetse, Basin, Greybull, Lovell, Powell, Shell, Thermopolis,
Ten Sleep, Worland, Buffalo, Kaycee, Jackson, Dubois, Riverton,
Shoshoni, Lander, Jeffrey City, Casper, Afton, Alpine,
Star Valley Ranch, Thayne, Pinedale, La Barge, Big Piney, Farson,
Kemmerer, Cokeville, Rock Springs, Green River, and Wamsutter
1235 PM MDT Sun Aug 17 2025

...Gusty Outflow Winds 40 to 50 mph through 8 PM Sunday...

This is a special weather statement from the National Weather
Service Office in Riverton.

* WHAT...Outflow wind gusts 40 to 50 mph with isolated gusts of
  55 mph or more possible.

* WHERE...Lower elevations across Johnson, Natrona, Fremont,
  Sweetwater, Sublette, and Lincoln Counties as well as the
  Bighorn Basin, Yellowstone National Park, and Jackson Hole.

* WHEN...Through 8 PM Sunday.

* ADDITIONAL DETAILS...Scattered high-based showers and
  thunderstorms will continue to develop and spread across much of
  Wyoming Sunday afternoon and evening. Any of these showers and
  storms will be capable of producing widespread outflow wind
  gusts of 40 to 50 mph with isolated gusts of 55 mph or more
  possible. Thunderstorms will also likely be producing frequent
  lightning strikes. Some locations may see small hail, especially
  in areas that saw prolonged periods of sunshine this morning
  where instability is the greatest.

$$