Thunderstorm Wind — Shiawassee, Michigan

2023-07-20 · near Owosso, Shiawassee, Michigan

Event narrative

Large trees trees and power lines reported down.

Wider weather episode

A combination of squall line thunderstorms tied to a strong cold front and pre-frontal supercells brought severe weather to parts of Southeast Michigan Thursday afternoon and early evening on July 20,2023. One supercell that developed just before the arrival of the squall line produced 2.75 inch (Baseball size) hail over Davison, MI leading to widespread hail damage to vehicles, homes, and businesses. Several other locations also received severe hail, including Ypsilanti where 2 inch (Lime size) hail fell and Ann Arbor which experienced 1.5 inch (Ping Pong size) hail, shutting down the Ann Arbor Art Fair for a couple hours. Additionally, there were numerous reports of downed trees (some of which fell on homes), several measured wind gusts in excess of 50 mph, and a waterspout over Anchor Bay. DTE reported 90,000 residents without power due to downed power lines. The outages were mainly along and south of I-69 to the I-94 corridor.

View location on OpenStreetMap → (43.0000, -84.1600)

Source: NOAA Storm Events Database, event_id 1117813. Narrative written by the NWS forecast office that issued the report.