You may register up to three (3) "static" locations, which means that they do not change no matter where you and your device are located. They can be set using city/ST, street address, zip code, or current GPS location. When a GPS location is set, that location remains set – your GPS location is not “followed” to avoid draining your battery. You may re-register locations as many times as you wish, overwriting previous locations.
In addition, you may use SW+ EnRoute to "follow" you and let you know when you enter a severe weather warning. For more on EnRoute, click here.