National Weather Service United States Department of Commerce


A cold front stalled out in the vicinity of Flint during the afternoon provided a boundary between cooler northerly flow on the north side and warmer southwesterly flow on the south side. Temperatures were limited in the low-mid 70s with greater cloud coverage on the cool side and low 80s on the warm side with less cloud. SPC's Day 1 Severe Weather Outlook highlighted a Marginal to Slight risk and was followed up by a Severe Thunderstorm Watch at 522 PM EDT as the first round of storms entered Southeast Michigan.

A strong multicell moving east to west made landfall near Ludington around 3 PM EDT. This storm then tracked due east until it reached Mount Pleasant where it took a sharp turn toward the southeast. Shortly after, a large hail core materialized dropping hailstones that measured 2 inches in diameter (lime or hen egg sized) near Brant Township around 515 PM and 1.75 inch (golf ball sized) hail closer to Chesaning. The last severe hail report (1 inch) with this storm occurred just before Montrose at 545 PM. The storm weakened shortly afterwards near the Flint and Lapeer areas.

A trailing line of storms rolled ashore near Silver Lake around 615 PM with an eastward trajectory. These storms produced mainly damaging wind gusts as they approached the M-54 corridor around 745 PM. There were several reports of trees and power lines brought down as the storm tracked east along the I-69 corridor. Storms exited east into southern Ontario before 10 PM.

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