As the rays of our radiant orb reach the terminator (the line dividing day from night at any one moment) they hit the world at a glancing angle, only to be revealed by the groundmist rising from the lakes dotting the woodland. The mist rises because water holds its heat better than air, so during the night the air cools faster, and the water starts to evaporate into the colder atmosphere. Many waterways see this phenomenon regularly. I can tell in my village in southern France from the time the valley filling fog burns off how nice and sunny the day will be. The later the better, if it’s still foggy at 11 am then the rest of the day is guaranteed gorgeous.
Image credit: Sven Zacek/ GDT European Wildlife Photographer of the Year