Here in Memphis, we don’t deal with severe weather very often. We have a pretty mild climate and transportation issues due to weather are fairly uncommon. We have one of the world’s busiest airports for shipping cargo and it operates 365 days most years. Public warehousing in Memphis benefits from our moderate climate and that benefit is in turn passed on to our customers in the form of very few weather-related shipping delays.
You can check weather related flight delays here http://www.fly.faa.gov/flyfaa/usmap.jsp though Memphis has relatively few.
Also, if this sort of thing interests you, you can check the Farmer’s Almanac http://www.almanac.com/.