Unusual clarity of almost the whole British Isles yesterday (15 Dec), with snow in the south, mountainous areas, and hoar frost in many low-lying areas. And with a crisp front along the English Channel. High pressure that has sat overhead for over a week is due to give way to a depression at the weekend with winds, higher temperatures and rain. Enjoy it while it lasts. Image courtesy of https://wvs.earthdata.nasa.gov/