How does doppler radar work?

1.9K views · 57 reactions | Latest radar and surface conditions show rain and freezing rain spreading from the south. There will be pockets of accumulating ice that may cause hazardous travel until temperatures warm above freezing this afternoon. | US National Weather Service Wilmington OH | Facebook

Radar update at 1:30 PM shows rain continuing across much of northern Ohio this afternoon with heavier pockets of rain and scattered thunderstorms moving back in from the west. Locally heavy rainfall of 1-2" is possible where thunderstorms set up this afternoon into tonight. | US National Weather Service Cleveland OH