I'll give this one a (huh?) out of ten.
In terms of plot, we have another Twister clone, only without the budget, and without the F/X, and apparently without a screenwriter who's seen the last 17 Twister clones already made. Compared to most Lifetime fare, Tornado Valley really doesn't stand out from the pack, good or bad. It's a bland, formulaic, run of the mill childhood tragedy, adult baggage, dysfunctional family flick that keeps Hallmark and Lifetime from being 24 hour infomercial channels.
Now for the good stuff. We have the Storm Protection Center in Norman, Oklahoma (in reality, the Storm Prediction Center in Norman), a name which got some giggles from me. What, they have a national storm shelter in Norman? "Hey, there's a bad storm, let's head up the Storm Protection Center."
Then there's Matilda, a device that looks like a plasma globe from Spencer's Gifts at the mall, which can not only help with predicting when and where tornadoes will, but will also prevent "billions of dollars in collateral damage". Huh? So, I'm to believe that Matilda can teleport crops, forests, and office buildings out of the path of a tornado? Maybe it's the funky patterns in Matilda's plasma globe that will distract the tornado from hitting people and buildings?
Remember to keep an eye out for the eco-nadoes. No trees, grass, or small forest animals were injured in the making of Tornado Valley, because these tornadoes only eat humans, houses, and tractors, refuse to drop any hail or rain, and are only slightly windier than a ceiling fan. Could be Matilda working subtly from the start...