How does doppler radar work?

14 reactions | [5:45pm Radar Update]: The latest animation from NWS Doppler Radar continues to show a band of heavy rain working its way slowly east across Long Island and Southern Connecticut. If you encounter flooded roads, turn around don't drown! | US National Weather Service New York NY | Facebook

Watch this 18 hour Doppler radar composite animation courtesy of the COD GOES site. This animation shows the shower and t-storm clusters which traversed the Chicago area from roughly 3am CDT Sunday morning through just past 9am CDT this (Monday) morning. | Tom Skilling

2.3K views · 183 reactions | Watch this composite weather radar animation, the product of the National Weather US National Weather Service network of Doppler Radars across the region. The animation covers the period from 12:55am CDT through 9:15 am. THE ANIMATION is also courtesy of the COD GOES weather satellite site. | Tom Skilling | Facebook