1.   Bathing to the winter fog.

2.   A third type of winter fog, called advection fog, forms when mild air is cooled to saturation as it passes over snow covered terrain.

3.   He broods that normal winter fog and bad air could produce an inversion.

4.   Winter fog often grounds helicopters.

5.   Winter fog, spreading over Western Europe, would in two weeks cover the German breakthrough known to history as the Battle of the Bulge.

6.   Chain-reaction pileups blamed on dense winter fog are not unusual in the area.

7.   Heavy winter fog has caused transport disruptions this week, restricting movement of river ferries and buses and forcing many early morning flights to reschedule.