I remember your story too, and was actually just thinking about you, because the local paper here (in Montgomery) was planning a retrospective on the Enterprise tornado.
I was in a small tornado up at a local lake about 13 years ago. Before the tornado, I had always loved storms - in fact, I was out on the porch of the lake cabin (watching the storm) 30 seconds before the tornado came down and pulled the roof off the house! But after that night I suffered from such horrible panic every time the smallest rain cloud blew up. As luck would have it, the following summer was incredibly active, bad weather wise, and was capped off with Hurricane Opal that October. I really really get what you're feeling, and I'm so sorry you're going through it! That happy shell of invulnerability that you used to live in has been smashed, and you can see now how close to peril you really are (and ALWAYS were). That sucks. It is traumatic, and it is paralyzing.
I mainly wanted to post to let you know that I do NOT still have those feelings - time really does build that "denial shell" up around you again, and you will feel better. I think what has to happen, though, is that you have to fully experience the scary situation over and over again, using that adrenaline to HEIGHTEN your awareness (and fear!), even though all you want is to feel numb and avoid the situation. If you can be aware of every gust of wind, every color of every cloud, every hailstone, then eventually your animal brain will be re-trained to stop freaking out over every sign of "danger" - because the danger really never happens! I know it doesn't help for me to tell you how unlikely it is that you will be in another tornado, because it was just as unlikely for you to be in the first one, and still it happened. Rational thought will not re-train your animal brain. Your animal brain has decided that tornados happen all the time, and it rains during them, and therefore any rain that comes along WILL result in another tornado. You can't reason that fear away, but you can use experience to convince the animal brain otherwise. Because luckily (or unluckily, depending) the animal brain has a short memory, and puts a LOT of stock in recent experience.
SO, the whole point of this is that LUCKY YOU - you live in Enterprise AL and will have many many many chances to re-train that animal brain this spring! Use every chance you have - study every cloud, smell every raindrop, watch that doppler! Just don't allow yourself to feel numb while you are doing it - emotion & adrenaline are all your animal brain understands, and even though it sucks to feel that anxiety, the truth is that FEELING it is the only way to beat it longterm.