We're about 15 miles north of Cody. 46F this afternoon. We just brought in all out potted plants. Supposed to get down to freezing temps next couple of days and expect some snow at 5000 foot level. (Cody foot hills and Big Horn Basin is at 5000 ft) Yellowstone is quite a bit higher elevation. This storm isn't going to be much but you do have to be careful and check weather for high cross winds with a high profile vehicle. Doubt any highways will be closed in this storm but it will be chilly in Yellowstone. Also keep in mind Thumb to Old Faithful is closed for repairs for rest of season (Looks like replacement of bridge)