Originally posted by Glacier
Try not to coddle her too much. It will only reinforce the behavior. If acting scared gets her positive attention, she will continue to act scared. Her people should act like everything is normal, as much as possible. She will respond to their behavior.

Good luck!
EXACTLY. Coddling her will only reassure her fear and show her there IS something to be afraid of. Tell them if she barks or slinks away in fear, tell her "NO" and don't give her any attention when she acts that way. It's hard, I know, because you just want to throw your arms around them and hug them and give them lots of kisses, but you can't do that.

Also, are there any children around who are also afraid of storms? If so, don't have her in the same room as them. Dogs feed off their owner's emotions, so if you are afraid of something, they will also be afraid of it. Likewise if you show no fear towards something, they won't, either!

I hope that helps you out a little bit.... and of course try the methods the others above have suggested!