They don't like the wind. They won't be moving much. They'll seek cover in down wind hide outs or pines. At the first clap of thunder this hunter is out of the tree 20 feet up. As far away from a metal stand with a metal bow in my hand as I can be. In other words,... I'm in the truck. Heavy rain I simply don't hunt with the bow. Blood trails are tough enough without the sign all washing away. There will be another day. That said, just before the crap hits the fan the deer will be on the feed. 15 minutes after it ends they'll be back at it again. Be there.