A strong upper level impulse moved over the Northern Rockies during the afternoon and evening hours of the 9th. Thunderstorms developed over the high terrain of western Montana and evolved into supercells and bowing segments as they moved across central and eastern Montana. These thunderstorms produced large hail and very strong wind gusts as they moved across portions of the Billings Forecast Area.

Thunderstorm Wind in FALLON, MONTANA
From 09-JUN-16 19:43:00 to 09-JUN-16 19:43:00 (MST-7)
Location: BAKER ARPT
Magnitude: 61.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Thunderstorm Wind in CUSTER, MONTANA
From 09-JUN-16 19:40:00 to 09-JUN-16 19:40:00 (MST-7)
Location: KNOWLTON
Magnitude: 61.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in POWDER RIVER, MONTANA
From 09-JUN-16 18:20:00 to 09-JUN-16 18:20:00 (MST-7)
Location: POWDERVILLE
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in TREASURE, MONTANA
From 09-JUN-16 18:06:00 to 09-JUN-16 18:06:00 (MST-7)
Location: HYSHAM
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A tree was blown down in the town of Hysham.

Thunderstorm Wind in POWDER RIVER, MONTANA
From 09-JUN-16 18:05:00 to 09-JUN-16 18:05:00 (MST-7)
Location: COALWOOD
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in YELLOWSTONE, MONTANA
From 09-JUN-16 17:35:00 to 09-JUN-16 17:35:00 (MST-7)
Location: POMPEYS PILLAR
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Thunderstorm Wind in YELLOWSTONE, MONTANA
From 09-JUN-16 17:25:00 to 09-JUN-16 17:25:00 (MST-7)
Location: (BIL)LOGAN ARPT BILL
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Hail in MUSSELSHELL, MONTANA
From 09-JUN-16 17:13:00 to 09-JUN-16 17:13:00 (MST-7)
Location: ROUNDUP
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MUSSELSHELL, MONTANA
From 09-JUN-16 17:06:00 to 09-JUN-16 17:06:00 (MST-7)
Location: ROUNDUP
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MUSSELSHELL, MONTANA
From 09-JUN-16 17:06:00 to 09-JUN-16 17:06:00 (MST-7)
Location: ROUNDUP
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in GOLDEN VALLEY, MONTANA
From 09-JUN-16 16:33:00 to 09-JUN-16 16:33:00 (MST-7)
Location: FRANKLIN
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in GOLDEN VALLEY, MONTANA
From 09-JUN-16 15:43:00 to 09-JUN-16 15:43:00 (MST-7)
Location: SAHARA
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Hail in WHEATLAND, MONTANA
From 09-JUN-16 15:35:00 to 09-JUN-16 15:35:00 (MST-7)
Location: WINNECOOK
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in FALLON, MONTANA
From 09-JUN-16 20:04:00 to 09-JUN-16 20:04:00 (MST-7)
Location: OLLIE
Magnitude: 63.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Some siding was blown off a house.

Hail in MUSSELSHELL, MONTANA
From 09-JUN-16 17:22:00 to 09-JUN-16 17:22:00 (MST-7)
Location: GAGE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter