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Cirrus clouds generally do not bring thunderstorms. They are high-level clouds composed of ice crystals and are typically associated with fair weather. Thunderstorms are usually associated with cumulonimbus clouds, which are large and dense clouds that can reach high altitudes and produce thunder, lightning, and heavy precipitation.
Thunderstorms
Clouds that are dark on the bottom are likely cumulonimbus clouds. That word comes from cumulus and nimbus. Cumulus means light, or fluffy. They're the kind of clouds you look for shapes in. Nimbus means rain. So, fluffy rain clouds is a rough translation. Cumulonimbus clouds bring rain, and possibly a tornado if you live in that area. It might be a heavy rain or a harsh thunderstorm. Just get inside as fast as you can!
A supercell may be in the range of 20 to 30 miles across. Some are larger.
Tornadoes are produce by strong thunderstorms called supercells. So tornadoes are often accompanied by thunder and lightning, strong winds, heavy rain, and sometimes large hail.
thunderstorms
Cirrus clouds generally do not bring thunderstorms. They are high-level clouds composed of ice crystals and are typically associated with fair weather. Thunderstorms are usually associated with cumulonimbus clouds, which are large and dense clouds that can reach high altitudes and produce thunder, lightning, and heavy precipitation.
cumulonimbus clouds
Thunderstorms can come from cirrus clouds. Large numbers of cirrus clouds is a sign that a frontal system is approaching the area.
hail
Cumulonimbulus clods.
Tornadoes are produced by thunderstorms called supercells which consist of enormous towering cumulonimbus clouds. These tall clouds block out a large amount of sunlight.
Thunderstorms
There is no such thing as a cumulonimbus tornado. A cumulonimbus cloud is a ver large towering cloud. Most thunderstorms are cumulonimbus clouds, and some of the strongest of these storms are what produce tornadoes.
Clouds that are dark on the bottom are likely cumulonimbus clouds. That word comes from cumulus and nimbus. Cumulus means light, or fluffy. They're the kind of clouds you look for shapes in. Nimbus means rain. So, fluffy rain clouds is a rough translation. Cumulonimbus clouds bring rain, and possibly a tornado if you live in that area. It might be a heavy rain or a harsh thunderstorm. Just get inside as fast as you can!
Cumulo-nimbus clouds. Sometimes they grow so tall that they develop an 'Anvil' (flat) top at icing level.
Hurricanes bring strong winds, large waves, torrential rain, and thunderstorms. These thunderstorms are sometimes severe, and can produce hail and tornadoes.