here some to learn regarding the weather radar,
However there is an interesting article somewhere that talk about how to master the Tilt Antenna function.
As you imagine it is important to have a "picture" of the weather in a vertical resolution and beside the fact that all the radars have a "kind" of gyro stabilization there is a simple formula to tilt your radar beam horizontally to the ground so you can judge your alternatives. the procedure if routinely preformed it takes 20 to 30 second.
http://www.nws.noaa.gov/os/aviation/...4dec-front.pdf