Originally Posted by GGDub

Remember we're talking about real cold temps here, the kind not likely seen in Kansas. After having this problem, I found out three other people who went through the same thing. I've never had it happen in temps above -20c. When this was happening last week, my thermometer read -29c.

It has to do with moisture in your freehub body, causing the little spring thingy to stick which doesn't allow the latch to come back down and grab the teeth in the hub which then engage the wheel.