sirius/weather questions

[hammer]

I was renewing my sirius in my car today and asked about activating the garmin. woman was clueless and gave me a number to call (she said it was garmin??). I figured I should get my hockey puck, hook it up and try it out. I know there are couple channels that always work. So I hooked 665 to car cradle and attached antenna. I got the two channels. But surprisingly, weather seemed to be working. It even popped up a warning that rain in my area. I thought weather was a separate subscription? What does it cost to get the various packages on the zumo?