This weatherman briefly appeared in the episode "Mother Nature", but had no significant role other than being chased by an angry mob.
When he predicted the weather wrong, the townspeople (who are crazy about the accuracy of the weather predictions) form an angry mob with torches and pitch forks, and they chase him out of the city. He is never seen again. (He predicted it would be sunny, but it then turned out that it was rainy)
His name is a word play of two different weathers, Storm and Rain.
His name is a play on current KABC-TV weeknight weather meteorologist, Dallas Raines.