In late March of 2025, a severe ice storm damaged forests across multiple counties in northern Michigan. Extensive areas experienced 0.25 to 0.50" of icing while several counties accrued twice as much. Ice is heavy, and this weight caused widespread crown damage and tree failure.  

Because the storm occurred near the end of winter when damage to hardwoods is inherently challenging, and slow regional green up in 2025, it was difficult to map forest impacts immediately after the event. By summer, the most severe area of damage was readily apparent at both coarse 240m resolution and at 10m resolution.  This mapped departure is consistent with the cross seasonal NDVI curve for the 2025 growing season compared to prior years.