Temperature inversion

It stopped raining in Snowdonia today, and the skies were clear but with mist in the valleys following a chilly night. We took this picture of Snowdon (Yr Wyddfa) and Crib Goch from the viewing point near the Pen-y-Gwryd hotel at the bottom of the Llanberis pass, with a big fog bank having rolled up the valley from Llyn Gwynant.