Airbubba mentioned some earlier PPRuNe discussion on WX radar training, and that contains a link to another PPRUNE discussion where Archie Trammell, who is considered a bit of a guru when it comes to WX radar, has written an article in a 1987 issue of Business and Commercial Aviation.
For ease of reference (and to enable printing it off or for easy storage), that article is here:
Weather Radar (Archie Trammell)