Severe thunderstorms moved east across areas mostly south of the Missouri River. The greatest damage occurred in Garfield County.

Thunderstorm Wind in MCCONE, MONTANA
From 14-AUG-09 20:45:00 to 14-AUG-09 20:45:00 (MST-7)
Location: CIRCLE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Pea size hail also was observed.

Thunderstorm Wind in MCCONE, MONTANA
From 14-AUG-09 21:05:00 to 14-AUG-09 21:05:00 (MST-7)
Location: VIDA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy rain was also reported.

Thunderstorm Wind in GARFIELD, MONTANA
From 14-AUG-09 18:10:00 to 14-AUG-09 18:10:00 (MST-7)
Location: SAND SPGS
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The spotter also received 0.25 inch of rain in ten minutes.

Thunderstorm Wind in GARFIELD, MONTANA
From 14-AUG-09 18:45:00 to 14-AUG-09 18:45:00 (MST-7)
Location: JORDAN
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The trained spotter estimated that the wind gust reached 70 mph.

Thunderstorm Wind in PRAIRIE, MONTANA
From 14-AUG-09 22:00:00 to 14-AUG-09 22:00:00 (MST-7)
Location: MC CLOUD
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Spotter estimated wind gusts of 60 to 65 mph.

Thunderstorm Wind in DAWSON, MONTANA
From 14-AUG-09 22:55:00 to 14-AUG-09 22:55:00 (MST-7)
Location: RICHEY
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The spotter estimated wind gusts of 50 to 60 mph.

Thunderstorm Wind in MCCONE, MONTANA
From 14-AUG-09 20:40:00 to 14-AUG-09 20:40:00 (MST-7)
Location: WELDON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter estimated wind gusted to 60 mph.

Heavy Rain in PRAIRIE, MONTANA
From 14-AUG-09 22:00:00 to 14-AUG-09 22:00:00 (MST-7)
Location: MC CLOUD
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Spotter measured 1.5 inches of rain from the storm.

Heavy Rain in DAWSON, MONTANA
From 14-AUG-09 22:55:00 to 14-AUG-09 22:55:00 (MST-7)
Location: RICHEY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Spotter received 2.00 inches of rain from the thunderstorm.

Heavy Rain in MCCONE, MONTANA
From 14-AUG-09 22:00:00 to 14-AUG-09 22:00:00 (MST-7)
Location: VIDA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Rainfall of 1.75 inches occurred with this storm.

Heavy Rain in MCCONE, MONTANA
From 14-AUG-09 20:21:00 to 14-AUG-09 20:21:00 (MST-7)
Location: WELDON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Measured 1.16 inches of rain in ten minutes.

Hail in GARFIELD, MONTANA
From 14-AUG-09 18:30:00 to 14-AUG-09 18:40:00 (MST-7)
Location: JORDAN
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

County Commissioner reported golf ball sized hail south of Hell Creek.   The entire area saw a lot of 1/2 sized hail as well.

Flash Flood in GARFIELD, MONTANA
From 14-AUG-09 20:00:00 to 14-AUG-09 23:00:00 (MST-7)
Location: VAN NORMAN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

A portion of the Van Norman Road was washed out due to heavy rain that accompanied a bow echo storm system.  Hell Creek Rd was partially washed out in several places.   Woody Creek went from being empty to having 7 feet of water in it, and the county commissioner had never seen it that high before.  At 12 miles southeast of Cohagen, 3.0 inches of rain fell, along with pea size hail and a 30 to 40 mph wind.

Thunderstorm Wind in MCCONE, MONTANA
From 14-AUG-09 20:21:00 to 14-AUG-09 20:21:00 (MST-7)
Location: WELDON
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in GARFIELD, MONTANA
From 14-AUG-09 18:10:00 to 14-AUG-09 19:55:00 (MST-7)
Location: JORDAN
Magnitude: 61.00 EG
Property damage: 150.00K
Crop damage: 4.20M
Reported by: Other Federal Agency

A bow echo thunderstorm raked through the area destroying sheds, wiping out crops and hay fields, and causing significant loss of property.  The bow echo started producing severe wind gusts and at least 1/2 hail about 25 miles northwest of Jordan in the Brussett area and tracked east-northeast through the county.   Golf ball sized hail was reported with the winds south of the Hell Creek area.  Twenty-six families were impacted with damage to their structures, livestock and crops.   A total of 213,440 acres of rangeland, wheat and hay fields were damaged partially to totally wiped out.  Six horses and a cow had to be put down due to injuries they received during the storm.  Damage information was gathered from the Jordan Tribune, and the USDA FSA agent in the county.

Thunderstorm Wind in MCCONE, MONTANA
From 14-AUG-09 22:00:00 to 14-AUG-09 22:00:00 (MST-7)
Location: VIDA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Spotter estimated wind gusts in excess of at least 60 mph.