National Weather Service United States Department of Commerce

Heavy Rainfall Threat The Across The Eastern U.S.

A strong cold front will gradually push through the Eastern U.S. over the next couple of days and will bring heavy rain and severe weather, primarily damaging winds . Excessive rainfall may result in flash flooding in the central Great Lakes and central Appalachians. Flash flood watches are currently in effect from the coastal Carolinas to the Great Lakes. Read More >

This page houses climatological snowfall data for the NWS Chicago County Warning Area (CWA), a 23 county area that includes a large portion of northern Illinois and northwest Indiana.  Much of the information is for two official climate sites, Chicago and Rockford, as these locations have longtime, quality-controlled climate data.

Besides climatology, this page can serve to help with snowfall risk assessment in terms of time of year, frequency, and magnitude. For more on specific snow events of the past, please visit our Past Events Page WPC Storm Summaries, and the NCEI Storm Events Database.
Snowfall in Chicago