At dawn on Sunday the streets in the Mission were wet and the sky looked dangerous, though no rain was actually falling when I went out.
The painted images below are from an eye-level mural ornamenting one long windowless wall of a Mexican restaurant in the same neighborhood (one of the borderlands between the Mission and SOMA).
It did not rain. The sky (as below) began to clear, in fact, and the sun even became partly visible. Looking up, I vainly longed for the illustrated book given to me some years back by my daughter about identifying categories of clouds (especially those streamer-like ones making faint vertical stripes in the picture's upper left corner) but as usual I was not carrying it when needed.