Here's your temperature trend over the next 5 days - cooler air will move south & east. Get a detailed forecast at weather.gov. | U.S. National Weather Service (NWS)

Here's a SUNDAY NWS DOPPLER RADAR ANIMATION of the rains which swept the Chicago area. This radar loop runs from just after 11am CDT through just past 7pm CDT Sunday and is courtesy of the College of DuPage. | Tom Skilling

Where's the rain this morning? Our radar network goes from coast to coast and will tell you where!📡🌧️☔️radar.weather.gov/Conus/full_loop.php | U.S. National Weather Service (NWS)

Closer view of the high resolution NWS "HRRR" model's "simulated weather radar" forecast through Sunday afternoon. | Tom Skilling

Combining data from multiple radars and multiple sensors (known as MRMS), we can put together a more complete picture of what kind of precipitation larger scale storms are producing. Looking at an animation of multiple radars over the northeastern U.S. we can see the counterclockwise rotation associated with the low pressure system affecting the area. https://www.nssl.noaa.gov/projects/mrms/ | U.S. National Weather Service (NWS)

Here's a simulated radar evolution through the storm. Precipitation really fills in this afternoon. Watch for rapidly changing conditions! | US National Weather Service Gray ME