April 10th marks the 8th year anniversary of the largest April tornado outbreak in Wisconsin history. One of the hardest hit areas was in northcentral Wisconsin when an EF-3 tornado impacted areas across Marathon and Lincoln counties and caused over $11 million in damage.
Two tornadoes of fairly weak rating hit Eau Claire county in western Wisconsin. However, across northeastern portions of the state this is where we had most of the tornado activity on that April 10th night.
Many of the tornadoes were fairly weak at EF-0 or EF-1 rating, but the strongest tornado across our area was near Kaukauna rated an EF-2 which produces over $6 million in damage.
Even in the Northwoods a few tornadoes hit the area. One was reported across the northeastern portions of Forest county and another across northwest Langlade county which were both rated EF-1. A stronger EF-2 tornado ripped across central Forest county as well.
The strongest tornado across the state that day was across northern Marathon and southeastern Lincoln counties. That tornado did impact the northern portions of the city of Merrill creating over $11 million in damage and was rated an EF-3. At least 22 homes and seven businesses were destroyed.
On average, the state of Wisconsin reports 23 tornadoes a year. The record number of tornadoes across the state in one year was 62 back in 2005. On average, tornadoes across the state are on the ground for seven to ten minutes and travel four to six miles. In 2018, the National Weather Service confirmed 33 tornadoes in Wisconsin.