I’ve noticed this localized geographic phenomenon before. Notice the mist & where it lays.I’ve seen the same phenomenon occur in the same spot many times. The mist is over a very large area.
Warm air is coming off of the ocean full of moisture.This warm moist air meets the cold mountains,the air chills,dew point is reached & fog happens.The contour of the mountain must focus the air mass. I’d like to see some time lapse.I bet it would move like water.
btw…..thats Ethel singing a song.