Tuesday Evening Weather Update

Moderate rain fell over parts of northern Illinois and southern Wisconsin late Tuesday afternoon with totals adding up to around a quarter of an inch over the immediate Stateline, but near an inch of rain closer to Dubuque and Galena. 


As a surface low pressure system moves through central Illinois, an upper level low will be moving out of Iowa and into northern Illinois Tuesday evening.  This will cause rain to move back in from the southwest, which it is already beginning to do so, and continue through Midnight.  Periods of moderate to heavy rain will continue into the overnight with rainfall totals adding up between an inch and an inch and a half by mid-morning Wednesday.


The surface low will be east of Illinois by Wednesday morning, but moisture in the low levels of the atmosphere will keep the cloud cover around through much of Wednesday.  There will be light showers in the morning, turning to drizzle by the late afternoon and evening.