Evening last, as shadows grew long, cumulus cloud X538 bumped into cumulus cloud B355 high above the prairie in front of my house.
A soft collision, that.
I watched the two clouds quietly merge together where they met; mists swirling white and Wedgewood blue. Within a few seconds, the brace of clouds flourished into a single new cumulus cloud: cumulus XB893.
After watching cumulus XB893 slide off toward Townsend and darkness, I got naked and climbed into my hot tub, awaiting first stars.