blizzard early next week! What do I do if...

There's been lots of talk about a weather system coming in early next week... They're saying lots of snow with the potential to be a full on blizzard. I was born and raised in Southern California, this is my first real winter, so I'm getting really nervous!! I've never been in a blizzard before! And of course I'm ready to pop any day now.
What do I do if I go into labor in the middle of it all?! My husband works 20 minutes away from our house, and my mom is staying with us but she's equally clueless on how to drive in these conditions... Do I call an ambulance?