Severe thunderstorms began to develop across the northern half of the NWS Billings Forecast Area late in the afternoon on June 28th.  Several supercells and numerous other severe thunderstorms (mainly large hail producers) developed across the area on the evening of June 28th and continued into the early morning hours of June 29th.

Hail in ROSEBUD, MONTANA
From 28-JUN-01 22:00:00 to 28-JUN-01 22:00:00 (MST)
Location: FORSYTH
Magnitude: 1.75 
Reported by: TRAINED SPOTTER

Hail in ROSEBUD, MONTANA
From 28-JUN-01 20:28:00 to 28-JUN-01 20:28:00 (MST)
Location: FORSYTH
Magnitude: 1.25 
Reported by: TRAINED SPOTTER

Hail in TREASURE, MONTANA
From 28-JUN-01 21:00:00 to 28-JUN-01 21:00:00 (MST)
Location: HYSHAM
Magnitude: 2.75 
Reported by: TRAINED SPOTTER

Hail in TREASURE, MONTANA
From 28-JUN-01 21:35:00 to 28-JUN-01 21:35:00 (MST)
Location: HYSHAM
Magnitude: 2.75 
Reported by: TRAINED SPOTTER

Heavy damage to homes and vehicles 8 miles southeast of Hysham

Hail in TREASURE, MONTANA
From 28-JUN-01 21:38:00 to 28-JUN-01 21:38:00 (MST)
Location: HYSHAM
Magnitude: 2.75 
Reported by: TRAINED SPOTTER

Broken windows in Hysham

Hail in WHEATLAND, MONTANA
From 28-JUN-01 18:10:00 to 28-JUN-01 18:10:00 (MST)
Location: HARLOWTON
Magnitude: 1.00 
Reported by: TRAINED SPOTTER

Hail in YELLOWSTONE, MONTANA
From 28-JUN-01 17:55:00 to 28-JUN-01 17:55:00 (MST)
Location: CUSTER
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

Hail in MUSSELSHELL, MONTANA
From 28-JUN-01 16:00:00 to 28-JUN-01 16:00:00 (MST)
Location: ROUNDUP
Magnitude: 1.25 
Reported by: TRAINED SPOTTER

Hail in MUSSELSHELL, MONTANA
From 28-JUN-01 16:30:00 to 28-JUN-01 16:30:00 (MST)
Location: ROUNDUP
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

Hail in WHEATLAND, MONTANA
From 28-JUN-01 02:00:00 to 28-JUN-01 02:00:00 (MST)
Location: JUDITH GAP
Magnitude: 1.00 
Reported by: TRAINED SPOTTER

Hail in WHEATLAND, MONTANA
From 28-JUN-01 02:15:00 to 28-JUN-01 02:15:00 (MST)
Location: JUDITH GAP
Magnitude: 1.00 
Reported by: TRAINED SPOTTER

Car windows smashed in Judith Gap

Hail in GOLDEN VALLEY, MONTANA
From 28-JUN-01 02:45:00 to 28-JUN-01 02:45:00 (MST)
Location: RYEGATE
Magnitude: 1.00 
Reported by: TRAINED SPOTTER

Hail in WHEATLAND, MONTANA
From 28-JUN-01 02:15:00 to 28-JUN-01 02:15:00 (MST)
Location: JUDITH GAP
Magnitude: 1.25 
Reported by: TRAINED SPOTTER

Car windows knocked out in Judith Gap

Hail in MUSSELSHELL, MONTANA
From 28-JUN-01 15:50:00 to 28-JUN-01 15:50:00 (MST)
Location: ROUNDUP
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

Hail in GOLDEN VALLEY, MONTANA
From 28-JUN-01 16:15:00 to 28-JUN-01 16:15:00 (MST)
Location: LAVINA
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

Hail in GOLDEN VALLEY, MONTANA
From 28-JUN-01 16:00:00 to 28-JUN-01 16:00:00 (MST)
Location: LAVINA
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

Hail in MUSSELSHELL, MONTANA
From 28-JUN-01 16:30:00 to 28-JUN-01 16:30:00 (MST)
Location: MUSSELSHELL
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

Hail in MUSSELSHELL, MONTANA
From 28-JUN-01 16:55:00 to 28-JUN-01 16:55:00 (MST)
Location: MUSSELSHELL
Magnitude: 1.00 
Reported by: TRAINED SPOTTER

Windows smashed 10 miles south of Musselshell

Hail in GOLDEN VALLEY, MONTANA
From 28-JUN-01 16:20:00 to 28-JUN-01 16:20:00 (MST)
Location: LAVINA
Magnitude: 1.75 
Reported by: TRAINED SPOTTER

Hail in MUSSELSHELL, MONTANA
From 28-JUN-01 17:00:00 to 28-JUN-01 17:00:00 (MST)
Location: MELSTONE
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

Hail in MUSSELSHELL, MONTANA
From 28-JUN-01 17:00:00 to 28-JUN-01 17:00:00 (MST)
Location: ROUNDUP
Magnitude: 1.25 
Reported by: TRAINED SPOTTER

Hail in MUSSELSHELL, MONTANA
From 28-JUN-01 16:35:00 to 28-JUN-01 16:35:00 (MST)
Location: ROUNDUP
Magnitude: 1.75 
Reported by: TRAINED SPOTTER

Hail in WHEATLAND, MONTANA
From 28-JUN-01 18:15:00 to 28-JUN-01 18:15:00 (MST)
Location: HARLOWTON
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

Hail in WHEATLAND, MONTANA
From 28-JUN-01 19:30:00 to 28-JUN-01 19:30:00 (MST)
Location: HARLOWTON
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

Hail in WHEATLAND, MONTANA
From 28-JUN-01 20:03:00 to 28-JUN-01 20:03:00 (MST)
Location: HEDGESVILLE
Magnitude: 1.00 
Reported by: TRAINED SPOTTER

Hail in ROSEBUD, MONTANA
From 28-JUN-01 20:10:00 to 28-JUN-01 20:10:00 (MST)
Location: FORSYTH
Magnitude: 1.00 
Reported by: TRAINED SPOTTER

Hail in GOLDEN VALLEY, MONTANA
From 28-JUN-01 20:20:00 to 28-JUN-01 20:20:00 (MST)
Location: RYEGATE
Magnitude: 0.88 
Reported by: TRAINED SPOTTER

Hail in MUSSELSHELL, MONTANA
From 28-JUN-01 19:40:00 to 28-JUN-01 19:40:00 (MST)
Location: ROUNDUP
Magnitude: 1.00 
Reported by: TRAINED SPOTTER

Hail in YELLOWSTONE, MONTANA
From 28-JUN-01 18:00:00 to 28-JUN-01 18:00:00 (MST)
Location: CUSTER
Magnitude: 1.75 
Reported by: TRAINED SPOTTER

Heavy crop damage 25 miles north/northwest of Custer

Hail in WHEATLAND, MONTANA
From 28-JUN-01 18:05:00 to 28-JUN-01 18:05:00 (MST)
Location: SHAWMUT
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

Hail in WHEATLAND, MONTANA
From 28-JUN-01 19:25:00 to 28-JUN-01 19:25:00 (MST)
Location: HARLOWTON
Magnitude: 0.88 
Reported by: TRAINED SPOTTER

Hail in YELLOWSTONE, MONTANA
From 28-JUN-01 18:00:00 to 28-JUN-01 18:00:00 (MST)
Location: CUSTER
Magnitude: 0.88 
Reported by: TRAINED SPOTTER

Hail in WHEATLAND, MONTANA
From 28-JUN-01 18:02:00 to 28-JUN-01 18:02:00 (MST)
Location: SHAWMUT
Magnitude: 1.00 
Reported by: TRAINED SPOTTER

Hail in MUSSELSHELL, MONTANA
From 28-JUN-01 17:30:00 to 28-JUN-01 17:30:00 (MST)
Location: ROUNDUP
Magnitude: 1.75 
Reported by: TRAINED SPOTTER

Hail in GOLDEN VALLEY, MONTANA
From 28-JUN-01 18:30:00 to 28-JUN-01 18:30:00 (MST)
Location: RYEGATE
Magnitude: 0.88 
Reported by: TRAINED SPOTTER

Hail in MUSSELSHELL, MONTANA
From 28-JUN-01 18:00:00 to 28-JUN-01 18:00:00 (MST)
Location: ROUNDUP
Magnitude: 0.88 
Reported by: TRAINED SPOTTER

Hail in ROSEBUD, MONTANA
From 28-JUN-01 22:55:00 to 28-JUN-01 22:55:00 (MST)
Location: COLSTRIP
Magnitude: 1.75 
Reported by: TRAINED SPOTTER

Hail in MUSSELSHELL, MONTANA
From 28-JUN-01 17:30:00 to 28-JUN-01 17:30:00 (MST)
Location: ROUNDUP
Magnitude: 1.75 
Reported by: TRAINED SPOTTER

Hail in ROSEBUD, MONTANA
From 28-JUN-01 18:00:00 to 28-JUN-01 18:00:00 (MST)
Location: INGOMAR
Magnitude: 0.88 
Reported by: TRAINED SPOTTER

Hail in GOLDEN VALLEY, MONTANA
From 28-JUN-01 18:30:00 to 28-JUN-01 18:30:00 (MST)
Location: RYEGATE
Magnitude: 0.88 
Reported by: TRAINED SPOTTER

Hail in GOLDEN VALLEY, MONTANA
From 28-JUN-01 19:00:00 to 28-JUN-01 19:00:00 (MST)
Location: RYEGATE
Magnitude: 0.75 
Reported by: TRAINED SPOTTER