Large hail, warm overnight lows, heavy downpours, and a weak tornado top the list of Michigan weather events on this day in history. From the National Weather Service archives here events that happened on July 18.
1942 – In Detroit, the overnight temperature dropped to only 80°. This is the highest record maximum low temperature ever recorded in Detroit and ties the records set on July 1, 1931 and July 5, 1921. Lansing and Flint also records their highest ever maximum low temperature. Lansing has a reading of 78°, which was tied on August 1, 2006. Flint sets the record with a temperature of 79°. Grand Rapids sees a daily record warm minimum temperature with a low of only 79°.
1952 - Thunderstorms with heavy downpours resulted in flooding of basements and some streets across West Michigan.
1986 - Golf ball sized hail (1.75 inch) fell 8.1 miles east northeast of Gladstone out of a severe thunderstorm in the early afternoon.
1987 - A severe thunderstorm produced a 64 mph wind gust at K I Sawyer Base in the mid evening.
2010 - A weak EF0 tornado hit Lighthouse County Park in Huron County. The tornado touched down at 1011 PM with maximum winds of 80 mph. The total path length was estimated at 2 miles, with a maximum width of 75 yards. Numerous trees were blown down, one of which fell onto a camper. Roof damage was also observed at one home. For Southwest Lower Michigan the storms produced an EF0 tornado in Allegan County.
2011 - Hot and humid conditions gave way to a batch of thunderstorms, with over 20 reports of severe weather across Metro Detroit. The severe reports included a blow down with dozens of trees snapped northwest of Monroe with winds up to 80 mph. Unfortunately, there was also one weather related fatality when the high thunderstorm winds knocked down a power line onto a man in Detroit.