If you love weather, even if you don't live in Chicago, you must check out, WGN Channel 9 Weather Center Blog.
I just happen to stumble upon this gem which is written by the bestest meteorologist, Tom Skilling. He's so knowledgeable and he explains EVERYTHING! There's a section where you can ask Tom weather questions and even a photo gallery (my fav) where local people take pictures of storms, skies, sunsets. etc.