Heat — Ontonagon, Michigan

2023-09-04 · Ontonagon, Michigan

Event narrative

Heat indices reached near 100 degrees across much of Ontonagon County.

Wider weather episode

An anomalously hot air mass being drawn into the region on southerly winds resulted in excessive heat indices exceeding 100F across portions of Upper Michigan on the 3rd and 4th.

Source: NOAA Storm Events Database, event_id 1131720. Narrative written by the NWS forecast office that issued the report.