SPC Stats

Path length: 57.5 miles

Width:  400 yards

Fatalities:  4

Injuries:  44

Rating:  F2

County:  Norman, Mahnomen, Polk, Clearwater

During the early morning hours of July 5, 1978, a family of tornadoes moved through parts of Norman, Mahnomen, Polk and Clearwater Counties in Minnesota.  Officially, the SPC Database lists a rating of F2.  Thomas Grazulis though has a rating of F3.  It was a devastating event that covered 55-60 miles or more (there are discrepancies on the path length).  Four fatalities were reported and 40+ injuries.

The tornado crossed through the town of Gary at 156am CT (that is when the clocks stopped).  1/3 of the town was flattened.  Three people were killed in Gary.

Next to be hit was the town of Fosston.  One killed, 8 injured.  Numerous mobile homes, businesses and other buildings damaged.

The tornado moved northeast through Clearbrook.  At least 2 injuries here with trailer homes demolished.  The path ended northeast of Clearbrook.

Details from Storm Data

First report of funnel cloud in Perley Area of Norman County near North Dakota border where trailer was demolished.  Moving southwest to northeast, tornado touched down at Gary where clocks were stopped at 1:56AM Central time.  One third of Gary flattened by tornado – 23 houses destroyed and 48 damaged.  10 mobile homes also destroyed, nursing home and school damaged and extensive damage to crops and trees.  Three killed and 35 injuries, 20 seriously.  80 people in 67 families left homeless.  Gary completely without power through Wednesday.  

Tornado continued touched down a second time at Fosston, where it destroyed county barn, 15-20 mobile homes, damaged a number of business places, houses and buildings.  One killed, 9 hospitalized at Fosston.  Storm continued northeast to Clearbrook demolishing trailer houses and feeling many large trees.  Temporary power outage and at least 2 injured at Clearbrook.

During the 75 miles path of the tornado, extensive damage included flattened grain fields, and dozens of farm buildings including granaries, barns and machine sheds.  Many cattle killed and destruction to timber was extensive.  Several planes were destroyed and a new terminal building suffered heavy damage at the Norman County Airport near Twin Valley.  Several distinct paths in the area of Twin Valley suggest a family type of tornadic activity.  A twisting action to trees was indicated at the tornadoes path, and straight line and downburst damage to an additional width of 2 to 4 miles.  Also, a skipping of the tornado, with touchdowns mainly at Gary and Fosston.  

Counties of Mahnomen, Norman and Polk declared major disaster areas with 4 dead, 38 injured, 16 hospitalized and over 100 homeless.  27 homes destroyed, 67 with major damage, and 134 minor damage.  22 mobile homes destroyed and 10 damaged.  An estimated 250 farm buildings and grain storage facilities destroyed in 3 counties.

Tornado Path

Click Map To Enlarge

SPC coordinates:  Start: 47.33 / -96.35   End:  47.75 / -95.25

Used NCDC county coordinates as well      

Note:  Exact tornado path may not be straight and/or continuous.

Newspaper Clippings


We gathered information for this event from the SPC & NCDC Databases, the July 1978 Storm Data Publication and Thomas Grazulis in Significant Tornadoes and found the following differences:

Path Length:

  • SPC/NCDC have a 57.5 mile path length.
  • Storm Data has a length at 75 miles.  They mention it was a family of tornadoes.
  • Grazulis has a family of tornadoes with a length of 61 miles.


  • SPC/NCDC have 44 injuries.
  • Storm Data and Grazulis list 38 injuries.


  • SPC/NCDC have this tornado rated at F2.
  • Grazulis has an F3 rating.


      The Storm Prediction Center

      NCDC Storm Events Database

      July 1978 Storm Data Publication


      Grazulis, Thomas P. (1993). Significant Tornadoes 1680-1991: A Chronology and Analysis of Events. St. Johnsbury, VT: The Tornado Project of Environmental Films. Page 1205.

      Questions or comments about this summary?  Contact us here!

      Join the tornado history discussion on our Discord Server!

      Note:  There are some images/videos in our summaries that were licensed to us to be used only on this website. If you would like to use an image/video in your project or blog, please contact us and we will grant permission if possible.

      Newspaper clips are embedded via newspapers.com. Please see their terms and conditions.


      Would you like to see more summaries like this one?  Support Tornado Talk on Patreon! Become a Patron!


      Leave a Reply

      Avatar placeholder
      Please be respectful of copyright. Unauthorized use is prohibited.