I think those are wind chills on the map but regardless it's still too cold. The following is from the Ship Your Reptiles website
In addition, shipping at Christmas time is a bad idea. The system is strained with the number of parcels right now. Packages get lost, delayed and damaged. You should wait.
No, they've been predicting temps as low as minus 7° F around St. Louis. The wind chills are going to be in the minus-teens and lower. Of course they can't make up their mind about how much snow we're supposed to get, naturally.