1.   By midnight ice was already forming on the roads.

2.   Ice was forming on the surface of the lake.

3.   Squeezed by the pressure of the water, the ice had formed into towering hummocks in the center of the river.

4.   Underfoot, ice forms sharp peaks and treacherous crevices for slipping, tripping and twisting ankles.

5.   Ice had formed on the windowpane.

6.   Before that crash, rules required pilots to inflate the deicing boot only after ice formed.

7.   Before that crash, rules required pilots to inflate the de-icing boot only after ice had formed.

8.   A few of these incidents occurred when ice formed on the wings, and weather conditions existed on Monday for ice to form on the American Eagle craft.

9.   Even so, club members quickly phone around when the ice forms black and thick after a cold snap.

10.   Ford found that ice may form in the throttle-body of the engine during extended highway trips in extremely cold weather.