Monday, May 22, 2017
Monday Evening Weather Update
An upper level low, otherwise known as a shortwave, is moving into northwest Iowa. Ahead of this feature there was just enough sunshine this afternoon to produce some instability in the atmosphere to allow for a few showers and thunderstorms to develop. Wind flow in the atmosphere is mostly from west to east, so anything that does develop out west will move east into Wisconsin. There is a thin line of showers over central Iowa, but current indications suggest this band will fade away before reaching northern Illinois and southern Wisconsin this evening.