He is a professor of atmospheric sciences at the University of Washington, a fellow of the American Meteorological Society, and his resume [0] looks impressive to
me. I realize that this is an appeal to authority, but since I don’t know enough about meteorology to make an informed decision about the specific information that he gives, his qualifications seem to indicate that he is a trustworthy source of meteorological information.
I did a quick internet search and looked him up on Wikipedia. His Wikipedia entry [1] mentions the controversies surrounding his non-professional views, but I didn’t find anything about his meteorological views being in question.
Please correct me if I missed something! It can be hard to determine if someone is trustworthy on the internet.