Precipitation/Clouds

Convection occurs when the Earth's surface within a conditionally unstable, or moist atmosphere, becomes heated more than its surroundings, leading to significant upward motion.


Altostratus clouds are gray or blue-gray middle level clouds composed of ice crystals and water droplets. These clouds usually cover the entire sky. In the thinner areas of the cloud, the sun may be dimly visible as a round disk. Altostratus clouds often form ahead of storms that will produce continuous precipitation.