I was just coming to see if anyone mentioned this one and if anyone recalled it. It was before my time, but my parents talk about it now and then.
EDIT: Wait -- your link is not to the New Orleans part of this storm. Off to Google.
EDIT2: In New Orleans, it was New Years Eve 1963. Check out the beginning of this 1964 Sugar Bowl highlight's video -- the Tulane Stadium stands covered in snow: