Foggy mornings

Late fall high pressure is keeping fog pinned to the ground, with little or no wind to blow it away. The same weather is causing air pollution spikes in the cities, especially Paris, right now. Sometimes the fog layer is very thin and we can see blue sky through it. Other times it's a thick, dark blanket of gray.

Morning ground fog with some blue sky above it.

Lately the fog has burned off by mid-afternoon, which is why some of my recent photos show beautifully blue skies. Our nights remain clear, so the mornings are cold. Then, as the sun comes up, the fog forms.