1894 - After two record heat waves in July, record cool weather arrives. Lansing falls to 32° for a rare summer freezing temperature.
1944 - Record high temperatures of 98° on the 3rd and 97° on the 4th were reached in Saginaw. Also on this date, the record for the lowest sea-level pressure for August in Detroit occurred: 29.14"!
1964 - Muskegon sets an August record and ties their all-time record high temperature at 99°. The temperature hits 100° at Grand Rapids, a record for the date.
1974 - 5.92 inches of rain fell for 24 hours in Sault Ste. Marie which is the heaviest rainfall record of all time at that station. Some basements were flooded in the city.
1988 - An F0 tornado touched down in the early evening 11.6 miles NW of Ironwood, MI. It had a damage path of 0.2 mile and a width of 20 yards.
1993 - A severe thunderstorm dropped 1.5 inch hail (ping pong ball sized) in Escanaba in the midafternoon.
2003 – A disturbance moving across West Michigan produced a line of strong thunderstorms on this Sunday afternoon. The storms produced 1.75 inch hail (golf ball sized) in Grand Junction and Muskegon. In Ottawa County, 0.75 inch hail (penny sized) covered the ground. Click this link for a radar loop of the storms on this day. The attached slideshow has a few severe weather maps for the day