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

Animated SIMULATED WEATHER RADAR FORECAST off the NWS HRRR model. Animation runs through 6am CST Wednesday | Tom Skilling

9 AM CDT - View of powerful #Hurricane #Erin from Puerto Rico radar and infrared satellite. The storm is over 200 miles from PR, but the main NWS radar on the island is now observing the eyewall at 40,000 feet above ground level. August 16, 2025 | Texas Storm Chasers

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)

A NWS radar loop of Hurricane Hanna approaching the Texas coast. | US National Weather Service Gray ME