The Storm Prediction Center has issued a TORNADO watch for Lyon and Osecola counties in NW Iowa until 7pm. A tornadic cell over southeastern South Dakota, about 80-90 miles west of Sioux Falls continues to move off to the east at 45 mph. This storm, if it hold together will be right along the Iowa-Minnesota border later this afternoon, along and just south of the Interstate 90 corridor. Most of the thunderstorms that develop later this afternoon will stay in Minnesota.