1) Always keep your gas tank at least 1/2 to all the way full...you may need it for heat (if you're stuck) or worse the lines could freeze and make your car in-operational.
2) Keep extra (very warm) winter clothes in your trunk snow pants, down jacket, warm boots, wool socks, wool gloves scarves and hats enough for you and your passengers.
3) Additional items to keep in your trunk ~ 2 cold weather sleeping bags, a large bag of kitty litter, a large coffee can with matches, flares, candles, heat packs and granola bars.
4) A small snow shovel is also very helpful to have if & when you are stuck in the snow.
These are the items my Dad always had in our trunk ~ be safe, stay warm!
In November 2001, The National Weather Service implemented a new Wind Chill Temperature Index. How does the old index compare with the new index? In general, if given the same actual air temperature and wind...the new index will usually be warmer than what you would have expected with the old index.