In the movie Safe Haven it is suggested that Doppler radar is used for predicting rainfall:

> Roger: Well, it's gonna rain, you know?
> 
> Alex: What? It's not gonna rain. I checked the weather report. It said
> a five percent chance of rain.
> 
> Roger: Yeah, well, the weather report's wrong.
> 
> Alex: They have instruments for this. **Doppler, Super Doppler**, all
> kinds of other crap.

How?