all you should have to do it go to the weather part of BBtoday and click preferences. Then in the location ID part type in your city and state if you don't know the zip code. Area codes don't work I think. Then click your scroll wheel and choose lookup location ID. It will search for whatever city and state you typed in and should return you some options to choose from. It will then give you the four letter and four number code for your area. Click save and you done.
If this doesn't work than you don't have your adn settings correct which will make the BBtoday function "time out" and hence not retrieve you weather info.