[tis]

Originally Posted by DickR

Well, the fog is due primarily to the very high humidity in the present air mass. As I write this, Accuweather reports the Moultonborough dew point as being 75 F, which is considered "oppressively humid" up here (although perhaps "a nice summer day" on our gulf coast!). Still, cloud formation and ultimately rain or snow does depend strongly on atmospheric dust, particles of which serves as nucleation sites for condensation as the humid air cools as it rises high up. Plenty can be found on this. One piece is here: https://www.nature.com/articles/d41586-021-02105-5

Except a few mornings have been like this and it wasn't particularly humid until today. Just wondering.