What is an important precaution to take if you are stuck outside during a severe storm?

You should always make sure you carry important items in your car. If you get stuck, you will be prepared. 

Make sure you have a flashlight
emergency first aid kit
matches
candle (i know its surprising) but when you are in a severe snow storm and your car is stuck, you can light the candle and it will keep you warm in the car til you get help. 

Also a phone or a device t reach someone incase of anything.