Pacific Thunderstorm

Thunderstorms can generally form and develop anywhere with the presence of thunderclouds. These clouds form under the circumstance where warm, moist air collides with cool air fronts. Thunderclouds undergo two stages of development: Cumulus and Mature. During the stage of Cumulus, the heat generated from the Sun's radiation warms up the Earth's crust causing an updraft to form. The Mature Stage starts off by the expansion of the Cumulus cloud. As the Cumulus cloud continues to reach larger size, the water molecules composed within the cloud become too heavy for the Cumulus to hold. Once this process is complete, the Cumulus cloud is then transformed into a Cumulonimbus cloud. The Cumulonimbus cloud is the basic foundation of a thundercloud.

This sound uses the following sound file from Freesound (http://www.freesound.org): 20080525Thunderstorm.flac by daveincamas