Fog and Mist

Betcha betcha betcha you didn't know right off the top of your head what the difference is between fog and mist.  I didn't. It is all in the density and therefore the visibility.  Mist reduces visibility to >1 KM or 5/8 or so of a mile.  Fog reduces visibility to under <1 KM or less than 5/8ths of a mile.

Got it now.

I'm all set.

A-O'K.