A flood develops gradually, many hours or even days after the rain event. The name originated in the Alps. Fog is literally a cloud on the ground. A fairly well-defined mass of fog observed at a distance, most commonly at sea or over a very large lake. A light breeze that blows from forests toward open country on clear calm nights.
Fresh snow is an excellent insulator.
In cold climates, the annual spring rise of streams as a result of melting snow. The transition zone between two different air masses. The length of a front is usually several hundred miles, but its width can vary from less than one mile up to 20-40 miles. The transition zone may be narrow, a mile or less in width, but it can be 50 or more miles across. The inflamed, gangrenous effect of excessive exposure to extreme cold.