I never tire of painting clouds. They are always interesting. The layer of stratocumulus on the western horizon was still convective even after a long October night. I suspect cloud top cooling was the main contributor to the cumulus cloud tops. I was very faithful to the cloud and sky colours. The autumn colours are probably at their peak. The cold air mass was certainly unstable so by 10 am the sky was overcast with daytime heating cumulus and stratocumulus. By noon the cloud bases had shot through the cloud tops since the cold air mass was quite dry. It was mainly sunny again! This is a typical progression for a cold air mass.