Fog

This fog moved in very quickly.  It might have only taken 5 or 10 minutes before going from blue sky to this.  In the next few minutes it wasn't worth trying to take a picture as it was a white-out.  This was a very thick fog, moving in and darkening everything like rain clouds.  Very typical for this part of the mid-west....warm days, wet ground from some recent rains and cooler nights.  Speaking of cooler nights....the 30's are in the forecast form weekend after next.