On Sunday evening of May 13th, a cluster of thunderstorms developed over the Big Horn Mountains of southeast Montana. The storms then developed into a bow echo complex of thunderstorms later that evening. This bow echo moved across southwest North Dakota late in the evening of May 13th, and across south central North Dakota in the early morning hours of Monday May 14th. Numerous reports of severe thunderstorm wind gusts and damage were received from this line of thunderstorms. Severe Thunderstorm Watch 269 was issued for much of west and central North Dakota during the late evening of May 13th. Severe Thunderstorm Watch 270 was issued to include additional counties in central North Dakota during the early morning hours of May 14. Also, in the wake of the convection, high wind warnings were issued for southwest North Dakota as wind speeds over high wind criteria continued for nearly 3 hours after the storms had ended.

Thunderstorm Wind in KIDDER, NORTH DAKOTA
From 14-MAY-07 02:15:00 to 14-MAY-07 02:25:00 (CST-6)
Location: TAPPEN
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

This was from a North Dakota Agricultural Weather Network observation site.

Thunderstorm Wind in STARK, NORTH DAKOTA
From 13-MAY-07 23:00:00 to 13-MAY-07 23:10:00 (MST-7)
Location: RICHARDTON
Magnitude: 67.00 MG
Property damage: 7.00K
Crop damage: 0.00K
Reported by: COOP Observer

A two and a half foot diameter ash tree that was seventy feet tall fell over onto a house.

High Wind in MERCER, NORTH DAKOTA
From 14-MAY-07 02:00:00 to 14-MAY-07 03:45:00 (CST-6)
Magnitude: 36.00 ES
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

High wind continued in the wake of convection.

High Wind in OLIVER, NORTH DAKOTA
From 14-MAY-07 02:00:00 to 14-MAY-07 03:45:00 (CST-6)
Magnitude: 36.00 ES
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

High wind continued in the wake of convection.

High Wind in MORTON, NORTH DAKOTA
From 14-MAY-07 02:00:00 to 14-MAY-07 03:45:00 (CST-6)
Magnitude: 36.00 ES
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

High wind continued in the wake of convection.

Thunderstorm Wind in BILLINGS, NORTH DAKOTA
From 13-MAY-07 23:13:00 to 13-MAY-07 23:26:00 (MST-7)
Location: MEDORA
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

RAWS site near Painted Canyon visitor center.

High Wind in STARK, NORTH DAKOTA
From 14-MAY-07 01:15:00 to 14-MAY-07 03:30:00 (CST-6)
Magnitude: 39.00 MS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

High wind continued in the wake of convection.

High Wind in DUNN, NORTH DAKOTA
From 14-MAY-07 01:15:00 to 14-MAY-07 03:30:00 (CST-6)
Magnitude: 36.00 ES
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

High wind continued in the wake of convection.

Thunderstorm Wind in HETTINGER, NORTH DAKOTA
From 13-MAY-07 22:15:00 to 13-MAY-07 22:27:00 (MST-7)
Location: REGENT
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm Wind in STARK, NORTH DAKOTA
From 13-MAY-07 22:10:00 to 13-MAY-07 22:25:00 (MST-7)
Location: BELFIELD
Magnitude: 65.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Newspaper

Machine shed on farm destroyed 5 miles south of Belfield. Barn 7 miles south of Belfield was damaged.

Thunderstorm Wind in SLOPE, NORTH DAKOTA
From 13-MAY-07 22:00:00 to 13-MAY-07 22:12:00 (MST-7)
Location: AMIDON
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm Wind in ADAMS, NORTH DAKOTA
From 13-MAY-07 22:24:00 to 13-MAY-07 22:36:00 (MST-7)
Location: HETTINGER
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Thunderstorm Wind in SLOPE, NORTH DAKOTA
From 13-MAY-07 21:10:00 to 13-MAY-07 21:31:00 (MST-7)
Location: MARMARTH
Magnitude: 68.00 MG
Property damage: 40.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A shop that was under construction was collapsed. Grain bin 1 mile east of Marmarth was damaged along with the roof of a farm outbuilding torn off. A horse trailer was tipped 1 mile northeast of Marmarth. The Sand Creek RAWS site 26 miles northeast of Marmarth measured a 78 mph gust around 1130 PM CDT.

Thunderstorm Wind in GOLDEN VALLEY, NORTH DAKOTA
From 13-MAY-07 21:10:00 to 13-MAY-07 21:21:00 (MST-7)
Location: GOLVA
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Thunderstorm Wind in BOWMAN, NORTH DAKOTA
From 13-MAY-07 22:05:00 to 13-MAY-07 22:17:00 (MST-7)
Location: SCRANTON
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Thunderstorm Wind in BILLINGS, NORTH DAKOTA
From 13-MAY-07 22:10:00 to 13-MAY-07 22:20:00 (MST-7)
Location: MEDORA
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in BOWMAN, NORTH DAKOTA
From 13-MAY-07 21:30:00 to 13-MAY-07 21:40:00 (MST-7)
Location: BOWMAN
Magnitude: 56.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: COOP Observer

Trees down in Bowman.

Thunderstorm Wind in OLIVER, NORTH DAKOTA
From 14-MAY-07 01:05:00 to 14-MAY-07 01:15:00 (CST-6)
Location: CENTER
Magnitude: 61.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: COOP Observer

Damage to observers home. Soffit and gutter was torn off.

Thunderstorm Wind in MCKENZIE, NORTH DAKOTA
From 13-MAY-07 20:40:00 to 13-MAY-07 20:51:00 (MST-7)
Location: WATFORD CITY
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in MCLEAN, NORTH DAKOTA
From 14-MAY-07 01:30:00 to 14-MAY-07 01:45:00 (CST-6)
Location: WILTON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Thunderstorm Wind in BURLEIGH, NORTH DAKOTA
From 14-MAY-07 01:18:00 to 14-MAY-07 01:28:00 (CST-6)
Location: BISMARCK ARPT
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Thunderstorm Wind in STUTSMAN, NORTH DAKOTA
From 14-MAY-07 03:08:00 to 14-MAY-07 03:17:00 (CST-6)
Location: JAMESTOWN ARPT
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Thunderstorm Wind in STARK, NORTH DAKOTA
From 13-MAY-07 22:27:00 to 13-MAY-07 22:40:00 (MST-7)
Location: DICKINSON ARPT
Magnitude: 62.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Thunderstorm Wind in GRANT, NORTH DAKOTA
From 13-MAY-07 23:30:00 to 13-MAY-07 23:40:00 (MST-7)
Location: CARSON
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm Wind in MORTON, NORTH DAKOTA
From 14-MAY-07 00:50:00 to 14-MAY-07 01:05:00 (CST-6)
Location: NEW SALEM
Magnitude: 60.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet