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Tornadoes
Tornadoes can be devastating, potent reminders of the awesome power of nature. In this photo, a rare "mother ship" cloud formation is seen over Childress,Texas. This is a sign of a supercell thunderstorm, a type of storm that often kicks off tornadoes with winds exceeding 200 miles an hour (322 kilometers an hour). Tornadoes can form over wide swaths of land and sea.
龙卷风
龙卷风具有很大的破坏性，提醒人们大自然拥有怎样令人敬畏的力量。这幅照片在美国德克萨斯州拍摄，展现了柴尔德里斯上空出现的罕见云型，彷佛一艘空中的航空母舰。这种云的出现预示着一场超大胞雷雨。超大胞雷雨经常引发龙卷风，风速可超过每小时200英里(约合每小时322公里)。龙卷风通常在宽阔的陆地和海洋上空形成。
