The Storm Prediction Center has issued a Severe Thunderstorm Watch which is in effect until 9pm this evening for the following counties, Allamakee, Howard, Mitchell and Winneshiek. Showers and Thunderstorms have begun to develop across SE Minnesota and especially in western Wisconsin this afternoon. The storms are expected to move SE and may clip the extreme northeastern parts of the state. Large hail and damaging winds will be the main threats. Other watches may be issued elsewhere in the state this afternoon.