UPDATE: St. Croix County is under a tornado warning
At 2:46 p.m. Wednesday, the National Weather Service office at Chanhassen, Minn., issued a tornado warning for southern St. Croix County, northern Pierce County and extreme southwestern Dunn County.
The warning is in effect until 3:30 p.m.
At 2:41 p.m., radar indicated a storm capable of producing a tornado.
The most dangerous part of the storm was six miles southwest of River Falls, or about five miles northeast of Prescott.