Tradition is BAD, BAD, BAD and WRONG, WRONG, WRONG.
"Normal" is the pathology of the merely average.
Nah - they both use an old plot device (invisible or mysterious barrier isolating a community while strange things happen within - 'The Midwich Cuckoos', for instance) but the stories are very different. To be honest, when I first read 'Under the Dome' all I could think of was the Simpsons movie...
Spider Pig! Spider Pig! Does whatever a spider pig does! Can he swing from a web? No he can't He's a pig! Lookout! He is the spider pig!!