Weather typically travels West to East, at least in the northern hemisphere. Sure enough, about an hour later, the sky in that sector got to looking rather grim. If I went straight home, I would come close to making my planned two hours of riding; and, I hoped, avoid getting caught in a storm.
It rained just a bit right before I reached home. The downpour/lightning I expected hasn't materialized yet. Sheesh. I could have ridden a little longer. One of these days I'll get it right.
*Or, "red sky"