Hail Damage Shingle Repair in Grand Rapids, MI

Why Grand Rapids’ hail season concentrates in early-to-late summer

Michigan’s severe convective storm season runs on warm-season instability, not winter systems, which is why the region’s hail activity is essentially absent from October through March and concentrated instead in June through August, with June alone accounting for 15 of the 56 recorded hail days (aggregated by ExoVzn using MRMS MESH hail signatures and the Storm Events Database for the KGRR radar station, 2014–2026). Because a hail-damaged roof often is not visibly leaking, the right inspection looks for granule loss, soft bruised spots, and impact marks rather than the eave ice or attic ventilation issues a winter inspection targets. The same 2014–2026 NOAA/NCEI window that recorded 56 hail days near Grand Rapids also logged 39 severe thunderstorm wind events and 5 tornadoes within 10km of the city, with 164 total NWS severe weather warnings issued — confirming this as a genuine, recurring summer storm pattern rather than a single outlier season.

For comparison, the same dataset shows Warren, MI, on the other side of the state, peaking in July instead of June and logging roughly 91 hail days over the same period — nearly double Grand Rapids’ count — which is exactly the kind of local variation that confirms this is genuine West Michigan climatology, not a generic statewide number.