As the Big Blizzard of 2013 bears down on us, everyone is rushing out for provisions. Water ... check. Canned food ... check. Extra blankets ... check. But people are forgetting one very important, critical accessory during this major weather event: the right iPhone app. Yes, the right application can mean the difference between life or death if you are stuck out in the cold or buried under 10 feet of snow. Check out the 5 best apps to help you survive any blizzard.