You've apparently never been to Central Texas during early (or late) winter...it can go from the low 30's to the 70's...and BACK in the space of a day. So it is very possible for cold to sneak up on ya.
Originally Posted by G.Gordon
"Did you get caught out in this?"
HOW THE HELL DO YOU GET "CAUGHT OUT IN THE COLD"? It ain't like it can sneak up on you.