With help from some of the groups that I follow here is a great map to help you plan your next cross country (USA) trip according to weather conditions.
(ALSO) by no means am I getting paid or affiliated in any way with upack. One of the members of a group that I follow shared the site with me and I thought it was very useful and so I’m sharing it with all the others that might find it interesting. Hope it helps.
Click on map to enlarge.