11:50pm Update: Showers continue over northern Illinois with a band of more moderate rainfall occurring just south of the immediate area. This is where the heavy rain threat is currently focused. The cold front is moving through Wisconsin now, but has had very little activity fire up along the front. Scattered showers and thunderstorms may still continue as the front comes through, but the severe threat is very low. Still some heavier downpours with the stronger storms, but overall a much more quiet night than Tuesday night.
Thunderstorms over northern Illinois are currently below severe limits, but are producing moderate to heavy rainfall. Stronger thunderstorms are lining up just south of the immediate viewing area, however storms are slowly beginning to build back west over Stephenson County and if this trend continues into the night, flooding would become a concern.
A Flash Flood Watch remains in effect for Winnebago, Boone, McHenry, Ogle, Lee, DeKalb and Whiteside counties through Thursday.