EF2 Tornado — Clark, Wisconsin

2025-05-15 · near Curtiss, Clark, Wisconsin

Event narrative

This strong tornado developed in fields west of Unity before tracking northeast toward Colby. As it moved through rural areas of northeastern Clark County, it damaged multiple farm outbuildings, trees, numerous power poles, and a home. NWS Storm Survey indicated EF2 damage to this home as the majority of its roof was removed with the attached garage heavily damaged. The tornado continued into the southeastern edge of Colby where multiple outbuildings, a home, and a car dealership sustained damage. The tornado moved into Marathon County before it quickly dissipated.

Wider weather episode

During the afternoon hours on May 15th, a developing complex of embedded supercell thunderstorms moved eastward into western Wisconsin. As they continued to intensify, they resulted in widespread hail of up to two inches in diameter across much of western Wisconsin and four tornadoes in Clark County. The strongest of these tornadoes was an EF-2 near Colby, Wisconsin where numerous power poles were downed and one home sustained significant damage to its roof and attached garage.

View location on OpenStreetMap → (44.8500, -90.3560)

Source: NOAA Storm Events Database, event_id 1265740. Narrative written by the NWS forecast office that issued the report.