Distant storm clouds

I photographed these clouds yesterday evening:

These were storm clouds: there were several flashes of lightning but the thunder was far away and any rain these clouds unleashed never reached the neighbourhood.

These pictures turned out surprisingly well: they were taken with my main camera on full optical zoom, but because of the dimming light level combined with window glass in the way of the lens, I expected the clouds to appear blurred, which would have been disappointing.