The National Weather Service said wind damage, large hail and even a few tornadoes could be possible on July 28.
The coverage area will develop Wednesday afternoon across northern Minnesota, moving across southeastern Wisconsin this evening.
The National Weather Service recommends watching carefully and seeking shelter as these storms are fast moving.
On the Sogn Valley SKYWARN page, Jim Braaten warns that being in the "moderate risk" category, a three of five on the risk level, is something the state sees about once or twice a decade.
These storms could hit the area around 5 p.m., and last until 9 p.m., in some cases.