Fog Fog Lightning strikes Lightning is a deadly surge of electical current. Ball lightning What about a glowing ball which moves through the air. Downburst winds Downbursts blast down from a thunderstorm. Hail Hail is a byproduct of raindrops that take a ride.
Fog can pose a serious threat to motorists.
The reduced visibility near the ground is caused by tiny particles suspended in the air. Water droplets that cause a moderate reduction in visibility are called mist. Those causing a serious visibility problem are called fog. The animation explains how fog forms. To view this as a QuickTime movie, with sound, click here .