Severe thunderstorms occurred during the evening hours of the 24th.  An upper trough pushing into the Pacific Northwest combined with a frontal boundary to the south and east of the area to produce the severe storms.  Heavy rain caused flash flooding in Richland County where water was flowing over a small stock dam.

Flash Flood in RICHLAND, MONTANA
From 24-JUN-07 23:16:00 to 25-JUN-07 00:33:00 (MST-7)
Location: SIDNEY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Rain amounting to 1.95 inches fell within 35 minutes and led to flash flooding with water flowing over a small stock dam.  A total of 2.5 inches of rain fell.

Thunderstorm Wind in ROOSEVELT, MONTANA
From 24-JUN-07 23:23:00 to 24-JUN-07 23:23:00 (MST-7)
Location: POPLAR
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in GARFIELD, MONTANA
From 24-JUN-07 23:29:00 to 24-JUN-07 23:29:00 (MST-7)
Location: SAND SPGS
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in SHERIDAN, MONTANA
From 25-JUN-07 00:35:00 to 25-JUN-07 00:35:00 (MST-7)
Location: MEDICINE LAKE
Magnitude: 52.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A microburst caused from the outflow of dying thunderstorms south of the area caused a 107 year old barn to collapse.  Observations from a RAWS site 8 miles away had a peak wind of 44 mph.  No other structures on the farm were damaged.

Hail in PHILLIPS, MONTANA
From 24-JUN-07 22:05:00 to 24-JUN-07 22:05:00 (MST-7)
Location: ZORTMAN
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in RICHLAND, MONTANA
From 24-JUN-07 23:01:00 to 24-JUN-07 23:01:00 (MST-7)
Location: SIDNEY
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in VALLEY, MONTANA
From 24-JUN-07 20:30:00 to 24-JUN-07 20:45:00 (MST-7)
Location: PINES
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in PHILLIPS, MONTANA
From 24-JUN-07 21:15:00 to 24-JUN-07 21:15:00 (MST-7)
Location: ZORTMAN
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in PHILLIPS, MONTANA
From 24-JUN-07 21:20:00 to 24-JUN-07 21:20:00 (MST-7)
Location: LANDUSKY
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Manning Corral Raws site.  The time was estimated based on radar data.

Thunderstorm Wind in VALLEY, MONTANA
From 24-JUN-07 21:23:00 to 24-JUN-07 21:23:00 (MST-7)
Location: FT PECK
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in GARFIELD, MONTANA
From 24-JUN-07 19:15:00 to 24-JUN-07 19:15:00 (MST-7)
Location: BRUSETT
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in GARFIELD, MONTANA
From 24-JUN-07 19:15:00 to 24-JUN-07 19:15:00 (MST-7)
Location: BRUSETT
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The hail started to cover the ground.

Hail in GARFIELD, MONTANA
From 24-JUN-07 19:35:00 to 24-JUN-07 19:35:00 (MST-7)
Location: BRUSETT
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Most of the hail was pea sized, but was mixed with some ping pong ball to golf ball sized stones.

Hail in GARFIELD, MONTANA
From 24-JUN-07 19:35:00 to 24-JUN-07 19:40:00 (MST-7)
Location: BRUSETT
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The hail did not cover the ground.

Hail in GARFIELD, MONTANA
From 24-JUN-07 20:35:00 to 24-JUN-07 20:35:00 (MST-7)
Location: JORDAN
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Mainly pea sized hail, but was mixed with half inch to golf ball sized hail.