A descending cold front, moderate instability, and strong wind sherar set the stage for the development of many severe thunderstorms moving southeast across most of northeast Montana.

Thunderstorm Wind in GARFIELD, MONTANA
From 24-JUL-13 18:55:00 to 24-JUL-13 18:55:00 (MST-7)
Location: LUFBOROUGH HILL DOT
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Lufborough Hill DOT site measured a 60 mph wind gust.

Thunderstorm Wind in MCCONE, MONTANA
From 24-JUL-13 16:21:00 to 24-JUL-13 16:21:00 (MST-7)
Location: CIRCLE MCCONE CO ARP
Magnitude: 62.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter measured a 71 mph wind gust.

Thunderstorm Wind in MCCONE, MONTANA
From 24-JUL-13 19:02:00 to 24-JUL-13 19:02:00 (MST-7)
Location: BROCKWAY
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter estimated wind gusts up to 58 mph.

Hail in VALLEY, MONTANA
From 24-JUL-13 14:10:00 to 24-JUL-13 14:20:00 (MST-7)
Location: NASHUA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported quarter-sized hail covering the ground and heavy rain.  Duration of hail was 10 minutes.

Hail in VALLEY, MONTANA
From 24-JUL-13 14:49:00 to 24-JUL-13 14:49:00 (MST-7)
Location: OSWEGO
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported quarter-sized hail covering the ground.

Hail in VALLEY, MONTANA
From 24-JUL-13 15:05:00 to 24-JUL-13 15:20:00 (MST-7)
Location: FRAZER
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported golf ball sized hail - duration 15 minutes.

Hail in VALLEY, MONTANA
From 24-JUL-13 15:18:00 to 24-JUL-13 15:18:00 (MST-7)
Location: FRAZER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported quarter-sized hail covering the road.

Hail in VALLEY, MONTANA
From 24-JUL-13 15:45:00 to 24-JUL-13 15:45:00 (MST-7)
Location: HINSDALE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported quarter-sized hail.

Hail in MCCONE, MONTANA
From 24-JUL-13 17:50:00 to 24-JUL-13 17:50:00 (MST-7)
Location: VIDA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported quarter-sized hail and heavy rain.

Thunderstorm Wind in DAWSON, MONTANA
From 24-JUL-13 17:35:00 to 24-JUL-13 17:35:00 (MST-7)
Location: GLENDIVE
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The ASOS at the Glendive Airport measured a 59 mph wind gust.

Hail in PRAIRIE, MONTANA
From 24-JUL-13 19:58:00 to 24-JUL-13 19:58:00 (MST-7)
Location: MC CLOUD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported quarter-sized hail, heavy rain, and winds up to 40 mph.

Thunderstorm Wind in GARFIELD, MONTANA
From 24-JUL-13 19:40:00 to 24-JUL-13 19:40:00 (MST-7)
Location: SAND SPGS
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported tree branches broken off measuring up to 10 inches in diameter, and some pea-sized hail.

Hail in VALLEY, MONTANA
From 24-JUL-13 13:49:00 to 24-JUL-13 13:56:00 (MST-7)
Location: SAINT MARIE
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported hen egg sized hail - duration 7 minutes, and some crop damage.

Hail in VALLEY, MONTANA
From 24-JUL-13 17:15:00 to 24-JUL-13 17:15:00 (MST-7)
Location: FT PECK
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported quarter-sized hail covering the ground.

Hail in VALLEY, MONTANA
From 24-JUL-13 15:54:00 to 24-JUL-13 16:04:00 (MST-7)
Location: HINSDALE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported golf ball sized hail - duration of 10 minutes.

Hail in VALLEY, MONTANA
From 24-JUL-13 16:05:00 to 24-JUL-13 16:05:00 (MST-7)
Location: HINSDALE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported golf ball sized hail.

Hail in VALLEY, MONTANA
From 24-JUL-13 16:08:00 to 24-JUL-13 16:24:00 (MST-7)
Location: HINSDALE
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported half dollar sized hail - duration of 16 minutes.

Hail in VALLEY, MONTANA
From 24-JUL-13 15:45:00 to 24-JUL-13 16:00:00 (MST-7)
Location: HINSDALE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported golf ball sized hail - duration of 15 minutes.

Thunderstorm Wind in DAWSON, MONTANA
From 24-JUL-13 17:00:00 to 24-JUL-13 17:00:00 (MST-7)
Location: LINDSAY
Magnitude: 62.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter measured a 71 mph wind gust and dime-sized hail, and estimated a total crop loss.

Hail in VALLEY, MONTANA
From 24-JUL-13 17:00:00 to 24-JUL-13 17:00:00 (MST-7)
Location: FRAZER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported quarter-sized hail.

Hail in VALLEY, MONTANA
From 24-JUL-13 16:30:00 to 24-JUL-13 16:30:00 (MST-7)
Location: NASHUA
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported mostly pea-sized hail with a few hail stones the size of half dollars.

Hail in MCCONE, MONTANA
From 24-JUL-13 18:02:00 to 24-JUL-13 18:02:00 (MST-7)
Location: WELDON
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported golf ball sized hail covering the ground.

Hail in VALLEY, MONTANA
From 24-JUL-13 17:20:00 to 24-JUL-13 17:20:00 (MST-7)
Location: FT PECK
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported penny-sized hail.

Hail in VALLEY, MONTANA
From 24-JUL-13 17:20:00 to 24-JUL-13 17:20:00 (MST-7)
Location: DUCK CREEK
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

NWS employee reported penny-sized hail.

Hail in DAWSON, MONTANA
From 24-JUL-13 19:32:00 to 24-JUL-13 19:32:00 (MST-7)
Location: LINDSAY
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported golf ball sized hail and wind gusts around 55 mph.

Hail in VALLEY, MONTANA
From 24-JUL-13 13:55:00 to 24-JUL-13 13:55:00 (MST-7)
Location: LARSLAN
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported ping pong ball sized hail near the church at Grain, 20 miles north of Nashua.

Hail in MCCONE, MONTANA
From 24-JUL-13 19:03:00 to 24-JUL-13 19:08:00 (MST-7)
Location: BROCKWAY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported quarter-sized hail - duration of 5 minutes, with winds of 58 mph estimated just before the hail began to fall.

Hail in VALLEY, MONTANA
From 24-JUL-13 14:40:00 to 24-JUL-13 14:40:00 (MST-7)
Location: NASHUA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported quarter-sized hail covering the road.

Hail in MCCONE, MONTANA
From 24-JUL-13 16:21:00 to 24-JUL-13 16:21:00 (MST-7)
Location: CIRCLE MCCONE CO ARP
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter estimated golf ball sized hail.

Hail in VALLEY, MONTANA
From 24-JUL-13 16:35:00 to 24-JUL-13 16:40:00 (MST-7)
Location: TAMPICO
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported half dollar sized hail covering the ground - duration of 5 minutes.