Storm

A storm is any disturbed state of the atmosphere caused by the flow of huge mass of air, affecting the surface of the earth, and strongly implying severe weather. It may be marked by strong winds, thunder and lightning, heavy precipitation such as rain, hail, snow, or ice (ice storm), or wind transporting some substance like sand through the atmosphere.

Storms are created when a center of low pressure develops, with a system of high pressure surrounding it. This combination of opposing forces can create winds and result in the formation of storm clouds, such as the cumulonimbus. Small, localized areas of low pressure can form from hot air rising off hot ground, resulting in smaller disturbances such as dust devils and whirlwinds.