Everything outside is literally dripping wet since the temp rose and the fog rolled in last night....
Around noon I went to start the truck (with Max the Meathead Dog already inside) and no power steering, no alternator. Sure enough it threw the belt on startup! It was mostly wound around the water pump pulley. Got it untangled, found no damage, put it back on, truck ran fine all the way to town, a few errands and back home.
I think the pulleys were so wet it slipped/grabbed and fell off. First time I've seen that outside of an unscheduled trip into a snowbank or body of water. Hope it does not become a habit!