An upper low was situated over the Pacific Northwest on the 6th and 7th. This resulted in a southwest flow aloft across the Billings Forecast Area. This pattern is quite favorable for the development of severe thunderstorms. At the same time, a surface boundary stretched across northeast Wyoming northward through the southern portions of south central and southeast Montana. Dewpoints across this area were in the 50s. This, combined with strong daytime heating, resulted in CAPES around 1500j/kg. Midlevel flow was around 50kts which providing plenty of shear for rotating storms. This all resulted in the development of severe thunderstorms which resulted in large hail and some property damage.

Hail in CUSTER, MONTANA
From 06-JUL-20 16:25:00 to 06-JUL-20 16:25:00 (MST-7)
Location: MIZPAH
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in FALLON, MONTANA
From 06-JUL-20 17:00:00 to 06-JUL-20 17:00:00 (MST-7)
Location: PLEVNA
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in FALLON, MONTANA
From 06-JUL-20 17:18:00 to 06-JUL-20 17:18:00 (MST-7)
Location: BAKER ARPT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MUSSELSHELL, MONTANA
From 06-JUL-20 13:12:00 to 06-JUL-20 13:12:00 (MST-7)
Location: DELPHIA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MUSSELSHELL, MONTANA
From 06-JUL-20 13:24:00 to 06-JUL-20 13:24:00 (MST-7)
Location: MUSSELSHELL
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A window was broken.

Hail in MUSSELSHELL, MONTANA
From 06-JUL-20 13:50:00 to 06-JUL-20 13:50:00 (MST-7)
Location: MELSTONE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in POWDER RIVER, MONTANA
From 06-JUL-20 15:25:00 to 06-JUL-20 15:25:00 (MST-7)
Location: MOORHEAD
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in POWDER RIVER, MONTANA
From 06-JUL-20 15:36:00 to 06-JUL-20 15:36:00 (MST-7)
Location: BIDDLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Hail in POWDER RIVER, MONTANA
From 06-JUL-20 16:04:00 to 06-JUL-20 16:04:00 (MST-7)
Location: BELLE CREEK ARPT
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ROSEBUD, MONTANA
From 06-JUL-20 14:58:00 to 06-JUL-20 14:58:00 (MST-7)
Location: VANANDA
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ROSEBUD, MONTANA
From 06-JUL-20 15:03:00 to 06-JUL-20 15:03:00 (MST-7)
Location: FORSYTH
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Property and crop damage was reported.

Hail in ROSEBUD, MONTANA
From 06-JUL-20 15:22:00 to 06-JUL-20 15:22:00 (MST-7)
Location: FORSYTH
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ROSEBUD, MONTANA
From 06-JUL-20 15:21:00 to 06-JUL-20 15:21:00 (MST-7)
Location: FORSYTH
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Hail in ROSEBUD, MONTANA
From 06-JUL-20 15:31:00 to 06-JUL-20 15:31:00 (MST-7)
Location: FORSYTH
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in ROSEBUD, MONTANA
From 06-JUL-20 15:20:00 to 06-JUL-20 15:20:00 (MST-7)
Location: FORSYTH ARPT
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in TREASURE, MONTANA
From 06-JUL-20 14:45:00 to 06-JUL-20 14:45:00 (MST-7)
Location: SARPY JCT
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in TREASURE, MONTANA
From 06-JUL-20 14:50:00 to 06-JUL-20 14:50:00 (MST-7)
Location: SANDERS
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Property damage was reported.

Hail in TREASURE, MONTANA
From 06-JUL-20 14:50:00 to 06-JUL-20 14:50:00 (MST-7)
Location: SANDERS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Hail in TREASURE, MONTANA
From 06-JUL-20 14:50:00 to 06-JUL-20 14:50:00 (MST-7)
Location: SANDERS
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public