Independence Day Derecho of 1977 - Wisconsin

Wisconsin

As the storm raced through Burnett, Washburn, Sawyer, Price, and Oneida counties, it caused a band of damage 10–20 miles (15–30 km) wide. Nearly 850,000 acres (3,400 km²) of forest were badly damaged or destroyed. The derecho caused $24M property damage. One person was killed and 35 were injured.

Here is a summary of damage by county:

• Sawyer County, Wisconsin - A wind gust of 75 mph (120 km/h) was measured at the Hayward airport. The downburst winds destroyed several homes and barns. Winds of 135 mph (220 km/h) were estimated at the Flambeau River State Forest. A woman was killed when a tree fell on her camper at Connors Lake. Nearby, an area of old-growth forest was almost completely destroyed.
• Price County, Wisconsin - The storm continued to damage several homes and injured 20 people. The gust front reached Phillips around 2:55 p.m. CDT and the severe winds lasted for 25 minutes. An anemometer at the airport registered a 100 mph (160 km/h) wind gust. All the homes in the Phillips area were damaged. Thirty were damaged beyond repair.
• Oneida County, Wisconsin - The derecho continued to damage homes and blow down large areas of forest. The gust front entered Rhinelander around 3:30 p.m. CDT. A wind speed of 115 mph (185 km/h) was recorded at the airport. Seven people were injured in this county. The severe winds continued through northeastern Wisconsin and across Lake Michigan.