My desk is flat, no lip or shelving. Is there something I can attach to it to help block the wind gust when the door opens?
You could use a paperweight, as the other person suggested. If you don't want to put weights on all your papers though, maybe you could put up decorative things on the edge of your desk to block the wind. Like a desk plate, plants, desk organizer, pictures, and other various knickknacks.