National Weather Service United States Department of Commerce

Event Summary:

A potent early Spring storm system triggered numerous small thunderstorms on March 30, 2005, including a few brief tornadoes from east of Mason City, IA through Mitchell County, Iowa to near the Minnesota-Iowa state line. This area was near the center of low pressure and nearby cold/warm fronts that served as a 'triple point' to focus severe weather development. Even though the storms were relatively small and weak, the ingredients were there to spawn brief tornadoes.

Known touchdowns included...

  • 6 miles west of Osage, IA (Mitchell County), near Echo Ave. - 2:04 p.m.
  • NW side of Stacyville (Mitchell County) - 2:13 p.m.
  • State line south of Adams, MN (Mower/Mitchell County) - 2:18 p.m.

All damage was rated F0 on the Fujita Damage Scale. Damage was mainly to garages, a pole barn, and other misc. older outbuildings.

Wind damage also occurred in southeast Minnesota, east and northeast of Rochester, MN from wind speeds of 60-70 mph.

Map of Tornado Touchdowns


map of tornado touchdowns

Radar image - 2:13 p.m. March 30, 2005

radar image

Damage Photos:

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Damage to garage west of Osage, IA. Pole barn destroyed on northwest side of Stacyville, IA. Wind damage to horse stable near Chester, MN.

Storm Photo:

wall cloud picture
Wall Cloud near Rochester, MN. Photo by Dan Roline.