Travel Reference
In-Depth Information
Signs of bad weather
Cumulonimbus are the thunderstorm
clouds whose base is near the ground
but which rise through the sky,
forming distinctive anvil-heads. As
they grow, they become unstable,
and generate static electricity.
Altostratus form as a large mass of air
lifts and condenses. These clouds
usually develop below 20,000 ft, can
produce precipitation, and indicate a
new weather front of rain or snow.
Cirrostratus are sheets of high-
altitude cloud formed by ice
crystals. They can be thousands of
feet thick, and yet almost
transparent. Sometimes they form a
halo around the sun or moon.
Nimbostratus are the thick, gray
clouds common in temperate
regions. These dense rain clouds
form below 10,000 ft.
Search WWH ::




Custom Search