Local Forecast Information for Northern Illinois and Northwest Indiana

The Chicago/Romeoville National Weather Service Forecast Office issues generalized weather forecasts out to 7 days for north central and northeast Illinois and far northwest Indiana. Other offices (including Quad Cities, Lincoln, St. Louis and Paducah) issue forecasts for the remainder of Illinois and Indiana.

These forecasts are the product of a mix of scientific models and forecaster experience. The models run twice a day and so routine forecasts are issued in the early morning and mid afternoon (4 am and 4 pm). Updated forecasts are issued as conditions warrant.

Latest Forecasts for Northern Illinois and Northwest Indiana:

Chicago Metropolitan Forecast Forecast for all of the Chicagoland area
Downtown Chicago Forecast
Downtown Rockford Forecast
Point Forecast Matrix for all of Northern Illinois and Northwest Indiana
Area Forecast Discussion Technical disscussion of Chicago WFO Forecast
Lake Michigan Beach Forecast for Illinois and Indiana
Weather Service Terminology Glossary

State Forecasts for Midwestern states:

Winter Weather Page: A page for all winter forecasts for northern Illinois and northwest Indiana, along with definitions, climate information and much more.

Forecasts Maps: from the Hydrometeorological Center

12 Hour Fronts/Precipitation	24 Hour Fronts/Precipitation	36 Hour Fronts/Precipitation	48 Hour Fronts/Precipitation
Day 3 Fronts	Day 4 Fronts	Day 5 Fronts	Day 6 Fronts

Long Range Forecasts:

Outlooks
Courtesy of the Climate Prediction Center (http://www.cpc.ncep.noaa.gov/)

How to interpret the following maps and other FAQ's.