It was just flat grey where I live at 150 m, but the tops of some tall trees looked a bit clouded, so I figured the fog was sitting a little higher up. Drove up to Tryvann (a hill here in Oslo) and it got thick fast. Way thicker than I wanted. I'd hoped to barely make out the far shore. Instead there was nothing there at all.
Leica M11 and Voigtlander 28/1.5 for the two first, and Light Lens Lab 72/2 SP-II for the third one.
My favourite is probably number one, although I went there for the lake shots.