A surface low moving east across southern Canada helped to bring high winds aloft to the surface across the area.

High Wind in CENTRAL AND SOUTHERN VALLEY, MONTANA
From 04-MAY-10 08:44:00 to 04-MAY-10 09:44:00 (MST-7)
Magnitude: 60.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

At 844 MST King Coulee RAWS recorded a wind gust to 61 mph. At 927 MST, Duck Creek recorded a wind gust to 55 mph. At 944 MST King Coulee recorded a wind gust of 69 mph. At 1034 MST Glasgow ASOS recorded a wind gust to 55 mph.

High Wind in NORTHERN PHILLIPS, MONTANA
From 04-MAY-10 06:00:00 to 04-MAY-10 08:00:00 (MST-7)
Magnitude: 35.00 MS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Big Flat Agrimet reported sustained winds of 40 mph or more for more than two hours.

High Wind in LITTLE ROCKY MOUNTAINS, MONTANA
From 04-MAY-10 06:41:00 to 04-MAY-10 08:44:00 (MST-7)
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

At 641 am MST Manning Corral RAWS (15S Zortman) reported wind gust to 56 mph; at 644 am MST 1W Zortman reported wind gust to 58 mph; at 844 am MST Zortman RAWS (1W Zortman) reported wind gust to 61 mph.

High Wind in NORTHERN VALLEY, MONTANA
From 04-MAY-10 08:00:00 to 04-MAY-10 10:00:00 (MST-7)
Magnitude: 35.00 MS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Saco DOT had sustained winds of 40 mph or greater.

High Wind in GARFIELD, MONTANA
From 04-MAY-10 08:25:00 to 04-MAY-10 11:44:00 (MST-7)
Magnitude: 60.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Peak wind gust of 69 mph occurred at the South Sawmill RAWS at 1025 am MST; Jordan ASOS reported a wind gust of 59 mph and Hillside DOT recorded a wind sustained wind of 69 mph with a gust to 79 mph.

High Wind in DAWSON, MONTANA
From 04-MAY-10 11:11:00 to 04-MAY-10 13:10:00 (MST-7)
Magnitude: 63.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

At 1235 MST, a 73 mph gust was reported 6 miles north of Fallon; at 1121 MST a 60 mph wind gust was recorded at the Lindsay Divide DOT sensor (7NW Lindsay); at 1155 MST a wind of 47 mph with a gust to 59 was recorded at Glendive Airport; a tree was knocked down in Glendive; and at 1310 (2W Bloomfield) a trained spotter measured wind gust of 64 mph.

High Wind in PETROLEUM, MONTANA
From 04-MAY-10 07:22:00 to 04-MAY-10 13:20:00 (MST-7)
Magnitude: 63.00 MG
Property damage: 35.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Damaging winds brought power outages to the area. Substantial damage occurred with an old building loosing a wall, a barn roof blown off, three windows on the second floor of the county courthouse blown out, and two grain bins being destroyed. Winnett was without power for several hours. About 18N Winnett a bull rack was blown off its storage blocks.  At 722 MST Chain Buttes RAWS recorded a 58 mph wind gust and a gust to 59 mph at 822 MST. At 941 MST Dry Blood RAWS recorded a gust to 66 mph. At 945 MST the Winnett Handar recorded a gust to 72 mph.

High Wind in WIBAUX, MONTANA
From 04-MAY-10 12:00:00 to 04-MAY-10 12:00:00 (MST-7)
Magnitude: 52.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Mesonet

Trained spotter 7 miles southeast of Wibaux estimated a wind gust of 60 mph. Also storm damage occurred where a couple of grain bins were blown over and destroyed.

High Wind in CENTRAL AND SE PHILLIPS, MONTANA
From 04-MAY-10 07:00:00 to 04-MAY-10 10:05:00 (MST-7)
Magnitude: 64.00 MG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Law Enforcement

At 700 MST, Malta South US191 DOT recorded a wind gust to 74 mph and several hours of sustained winds of over 40 mph. At 845 MST, Malta SuperAWOS recorded a gust to 62 mph mph with several hours of sustained winds over 40 mph. At 1005 MST, Phillips County dispatch reported that a camper was blown over on Highway 191. High winds snapped a pine tree in Malta. 5 miles east of Malta, the high winds wrapped trampoline around a tree. The high winds also caused a phone outage in Malta.

High Wind in MCCONE, MONTANA
From 04-MAY-10 10:30:00 to 04-MAY-10 12:37:00 (MST-7)
Magnitude: 59.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

At 1050am MST a wind gust of 68 mph was recorded at the Fort Peck Dam Handar sensor (32N Nelson Creek Recreation Area); at 1030 am a 66 mph gust was recorded at Brockway; a 60 mph gust was recorded at 22NW Circle; and a 40 mph wind was recorded for over two hours at Cow Creek DOT with a gust to 58 mph.

High Wind in RICHLAND, MONTANA
From 04-MAY-10 11:30:00 to 04-MAY-10 13:30:00 (MST-7)
Magnitude: 52.00 EG
Crop damage: 0.00K
Reported by: Public

Five miles northeast of Savage a 10 inch diameter tree was blown over by an estimated 60 mph gust. At 1330 MST ten miles southeast of Lambert reported sustained winds of 40 mph for over 3 hours. Power outages were reported.

High Wind in PRAIRIE, MONTANA
From 04-MAY-10 11:25:00 to 04-MAY-10 12:44:00 (MST-7)
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

At 1125 pm MST 20 miles northwest of Terry, sustained winds of 40 mph occurred. At 1244 pm MST Big Sheep RAWS reported a wind gust of 60 mph. The strong winds also downed a large tree in Terry.