Blizzard conditions, an F2 tornado, and record cold top the list of Michigan weather events on this day in history. From the National Weather Service archives here are the weather events that happened on April 7.
1857 - The low temperature fell to -16° at Norwich Mine near Ontonagon.
1907 - Up to a foot of wet snow fell in many parts of the Keweenaw Peninsula and in the hills west of Marquette which blocked trains around Houghton.
1954 - A tornado destroyed two barns and damaged a house and apartment building near Fulton in Kalamazoo County. An F2 tornado hit Genesee County at 6:40 pm causing 2 injuries and $25,000 in damages.
1972 - Temperature records are set for the chilly high readings on this date. Grand Rapids and Lansing have a high temperature of 24°, which is the coldest high temperature for the month of April at these cities. Other daily temperature records include Alpena, Detroit and Houghton Lake, all with a reading of only 25°. Flint sees a record of 27° and Marquette 21°.
1979 - A record low temperature of -5° occurred at Weather Forecast Office in Marquette in Negaunee Township.
1982 - Temperatures plunge to near zero as arctic high pressure persists over the Great Lakes states. Daily records include Detroit with 10°, Houghton Lake 7°, and Sault Ste. Marie 2°. Lansing falls to -2° for a record low for the date and the latest sub-zero temperature on record. Muskegon falls to 1° and Grand Rapids to 3° and Flint 6° for their coldest April temperatures on record.
2007 - An intense storm system tracking from the Plains into the Great Lakes dumped heavy lake enhanced snow across much of Upper Michigan from the 3rd into the 7th. Blizzard to near-blizzard conditions also occurred from the 4th continuing into the 5th closing many schools and businesses throughout the area. Heavy snow continued at times from late on the 5th through the morning of the 7th. Northwest winds gusting to 30 mph or greater caused reduced visibilities of one-half mile or less in snow and blowing snow. Storm total snowfall accumulations included 38 inches south of Grand Marais, 33 inches at Munising and south of Wetmore and 24 inches at Shingleton and local accumulations reached 18 inches near Paradise. An observer at Watton measured 10.4 inches of snow in the 24 hour period ending on the 4th. There were several minor accidents on the 4th due to the heavy snow. There was generally a break in heavy snow from the 5th into the morning of the 6th before another 12 inches of snow fell at Herman during the afternoon of the 6th into the morning of the 7th. Storm total snowfall ending on the morning of the 7th included 35 inches at Herman, 21 inches at Watton and 16 inches at Baraga. Blizzard to near-blizzard conditions also occurred from the 4th continuing into the 5th closing many schools and businesses throughout the area of Delta and Northern Schoolcraft Counties. Periods of heavy snow continued from the 5th into the 7th. The combination of heavy snow and north winds gusting to 30 mph or greater reduced visibility to one-half mile or less at times in snow and blowing snow. Storm total accumulations ending on the 7th, included over 60 inches at Painesdale, 38 inches at Atlantic Mine, 33 inches at Laurium and 31 inches at Houghton. Storm total snowfall accumulations included 48 inches at NWS Marquette, 27 inches at Green Garden, 25 inches at Champion and 20 inches in downtown Marquette. The calendar day snowfall total of 24 inches at NWS Marquette on the 4th was the second highest total ever for any calendar day at the station.