A line of severe thunderstorms tracked southeastward from Montana across northeastern Wyoming during the evening. Hail to the size of golf balls and strong wind gusts accompanied the storms. Heavy rain produced flash flooding in parts of Crook and Weston Counties.

Thunderstorm Wind in CROOK, WYOMING
From 17-JUN-15 19:40:00 to 17-JUN-15 19:40:00 (MST-7)
Location: HULETT
Magnitude: 64.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Some tree damage was reported.

Hail in CAMPBELL, WYOMING
From 17-JUN-15 19:15:00 to 17-JUN-15 19:15:00 (MST-7)
Location: WESTON
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Hail in CAMPBELL, WYOMING
From 17-JUN-15 19:16:00 to 17-JUN-15 19:16:00 (MST-7)
Location: WESTON
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in CAMPBELL, WYOMING
From 17-JUN-15 19:16:00 to 17-JUN-15 19:16:00 (MST-7)
Location: WESTON
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Public

The combination of hail and wind caused minor damage.

Hail in CROOK, WYOMING
From 17-JUN-15 19:45:00 to 17-JUN-15 19:45:00 (MST-7)
Location: HULETT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in CROOK, WYOMING
From 17-JUN-15 19:45:00 to 17-JUN-15 19:45:00 (MST-7)
Location: HULETT
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts were estimated at 60 mph.

Hail in CROOK, WYOMING
From 17-JUN-15 20:25:00 to 17-JUN-15 20:25:00 (MST-7)
Location: PINE HAVEN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Quarter sized hail covered the ground.

Thunderstorm Wind in WESTON, WYOMING
From 17-JUN-15 21:15:00 to 17-JUN-15 21:15:00 (MST-7)
Location: NEWCASTLE ARPT
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Hail in CAMPBELL, WYOMING
From 17-JUN-15 21:23:00 to 17-JUN-15 21:23:00 (MST-7)
Location: WRIGHT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Flash Flood in CROOK, WYOMING
From 17-JUN-15 22:45:00 to 18-JUN-15 01:15:00 (MST-7)
Location: MOORCROFT
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Two to three feet of water was reported over Wind Creek Road. The road was washed out in eight places.

Flash Flood in WESTON, WYOMING
From 17-JUN-15 21:25:00 to 18-JUN-15 00:15:00 (MST-7)
Location: OSAGE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Runoff from the heavy rain caused Clayspur Road to wash out in several places.

Thunderstorm Wind in CAMPBELL, WYOMING
From 17-JUN-15 18:56:00 to 17-JUN-15 19:05:00 (MST-7)
Location: ROCKYPOINT
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Hail in CAMPBELL, WYOMING
From 17-JUN-15 20:25:00 to 17-JUN-15 20:25:00 (MST-7)
Location: ROZET
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in CAMPBELL, WYOMING
From 17-JUN-15 20:25:00 to 17-JUN-15 20:25:00 (MST-7)
Location: ROZET
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The combination of hail and wind caused minor damage.