The recent scenes of tornado devastation reminded me of a past post at survivalblog. There are other posts on the web as well that provide information about packaging preparedness supplies and burying them in a location that allows you to find them when you need them. In tornado country, that could be as simple as your back yard.
You need to be a bit inventive about how to find them again if all the local landmarks, including trees, are blown away. In addition to a waterproof and vermin-proof container, you will probably need to have them in a shallow spot in some sort of non-degradable mesh bag (like a big bag from oranges or a large nylon mesh laundrybag) that will allow you to find the mesh with only hand digging, then pull the bag, with the container inside, up to the surface. Hey, it's your yard so put a couple of stepping stones over it to hide the disturbed soil and call it done!
Imagine if you find yourself with absolutely nothing but the concrete foundation of your home (Oohh!! landmark!). Many people in the southeast and mid-west US have had this experience in the last month or two. Wouldn't it be lovely to have easy access to your recycled bakery 5-gallon bucket (with the water-tight screw-on Gamma seal lid) containing a change of clothes and shoes, toiletries, freeze dried food, a water filter and collapsible container, and $200 in cash! It doesn't need to be quite as fancy as the one described in the post, and the contents could be enough to give you the strength you need to persevere.