How does doppler radar work?

3K views · 23 reactions | Check out this 12 hr loop of satellite and radar imagery from last night's storms! | US National Weather Service Twin Cities Minnesota | Facebook

12K views · 81 reactions | Here is the forecast radar for this evening's storms. Thunderstorms will form along the MN/SD border within the next couple of hours, merging quickly into a line while traveling east. #mnwx #wiwx | US National Weather Service Twin Cities Minnesota | Facebook

Radar Update: Snow continues to move further north across the area. We've been receiving several accumulation reports of an inch so far. Expect this area of snow to continue into the afternoon, with areas along the southern edge changing to a rain/snow mix. | US National Weather Service Duluth Minnesota