A strong disturbance and monsoon moisture brought severe thunderstorms to the Wind River Basin and Natrona County. Thunderstorm outflow wind over 70 mph toppled trees and downed many large sturdy branches around the area.

Thunderstorm Wind in FREMONT, WYOMING
From 11-JUL-12 13:50:00 to 11-JUL-12 13:50:00 (MST-7)
Location: FT WASHAKIE
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Public

A strong thunderstorm produced wind that snapped healthy branches two to three inches in diameter off trees north of Fort Washakie.

Thunderstorm Wind in FREMONT, WYOMING
From 11-JUL-12 14:04:00 to 11-JUL-12 14:04:00 (MST-7)
Location: (RIW)RIVERTON RGNL A
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

A strong thunderstorm moved through the Riverton area, producing a wind gust of 61 mph at Riverton Regional Airport.

Thunderstorm Wind in FREMONT, WYOMING
From 11-JUL-12 14:04:00 to 11-JUL-12 14:04:00 (MST-7)
Location: (RIW)RIVERTON RGNL A
Magnitude: 61.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

An anemometer at the Riverton National Weather Service Forecast Office measured a thunderstorm wind gust of 70 mph.

Thunderstorm Wind in FREMONT, WYOMING
From 11-JUL-12 14:28:00 to 11-JUL-12 14:28:00 (MST-7)
Location: SHOSHONI
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A local emergency manager estimated 60 mph wind gusts as a thunderstorm moved through the town of Shoshoni.

Thunderstorm Wind in HOT SPRINGS, WYOMING
From 11-JUL-12 14:55:00 to 11-JUL-12 14:55:00 (MST-7)
Location: THERMOPOLIS
Magnitude: 60.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A strong thunderstorm produced wind gusts to 69 mph at an observation site atop Boysen Peak.

Thunderstorm Wind in FREMONT, WYOMING
From 11-JUL-12 15:05:00 to 11-JUL-12 15:05:00 (MST-7)
Location: LOST CABIN
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A 60 mph thunderstorm wind gust was recorded at the Lost Cabin Gas Plant six miles east of Lysite.

Thunderstorm Wind in NATRONA, WYOMING
From 11-JUL-12 15:20:00 to 11-JUL-12 15:27:00 (MST-7)
Location: HILAND
Magnitude: 60.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A thunderstorm moved through Hiland and produced wind gusts of 66 and 69 mph at an automated observing site along U.S. Highway 20/26.

Thunderstorm Wind in FREMONT, WYOMING
From 11-JUL-12 15:50:00 to 11-JUL-12 15:50:00 (MST-7)
Location: JEFFREY CITY
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

A strong thunderstorm produced a 65 mph wind gust at an automated sensor on Green Mountain in Fremont County.

Thunderstorm Wind in NATRONA, WYOMING
From 11-JUL-12 16:40:00 to 11-JUL-12 16:40:00 (MST-7)
Location: (CPR)NATRONA CO ARPT
Magnitude: 59.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

A strong thunderstorm formed west of Casper and produced a 68 mph wind gust at Casper/Natrona County International Airport.

Thunderstorm Wind in FREMONT, WYOMING
From 11-JUL-12 13:45:00 to 11-JUL-12 13:45:00 (MST-7)
Location: PAVILLION
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Public

Strong wind snapped healthy tree branches up to two inches in diameter in the town of Pavillion.

Thunderstorm Wind in FREMONT, WYOMING
From 11-JUL-12 13:45:00 to 11-JUL-12 13:45:00 (MST-7)
Location: KINNEAR
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Many healthy tree branches up to three inches in diameter were snapped off by strong wind at a home north of Kinnear.

Thunderstorm Wind in FREMONT, WYOMING
From 11-JUL-12 14:15:00 to 11-JUL-12 14:15:00 (MST-7)
Location: RIVERTON
Magnitude: 73.00 MG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Public

An individual with an automated weather station measured a wind gust of 84 mph on the northwest side of Riverton. A 15-foot-tall tree was uprooted at the same location.