I'd love to be able to filter results by weather reports. I'm often trying to find what the weather might have been like on a specific day in a specific place - i.e was March 3rd 1922 war, cloudy, rainy, etc - so maybe results could be filtered to show just those columns and/or pages which have that weather info. It really helps give an extra touch of authenticity touch when writing up historic events. If it's possible to filter by advertisements, then why not weather?