Callofdutero

Tornado


Tornadoes are one of nature's most powerful and destructive forces. Here's some advice on how to prepare for a tornado and what to do if you're caught in a twister's path.
Safety Tips• Prepare for tornadoes by gathering emergency supplies including food, water, medications, batteries, flashlights, important documents, road maps, and a full tank of gasoline.
• When a tornadoapproaches, anyone in its path should take shelter indoors—preferably in a basement or an interior first-floor room or hallway.
• Avoid windows and seek additional protection by getting underneath large,solid pieces of furniture.
• Avoid automobiles and mobile homes, which provide almost no protection from tornadoes.
• Those caught outside should lie flat in a depression or on other low ground andwait for the storm to pass.
Tornadoes have been observed on every continent except Antarctica. However, the vast majority of tornadoes in the world occur in the so-called "Tornado Alley" region oftheUnited States, although they can occur nearly anywhere in North America.[7] They also occasionally occur in south-central and eastern Asia, northern and east-central South America, Southern Africa,northwestern and southeast Europe, western and southeastern Australia, and New Zealand.[8] Tornadoes can be detected before or as they occur through the use of Pulse-Doppler radar by recognizing patternsin velocity and reflectivity data, such as hook echoes, as well as by the efforts of storm spotters.
There are several scales for rating the strength of tornadoes. The Fujita scale rates tornadoesby damage caused and has been replaced in some countries by the updatedEnhanced Fujita Scale. An F0 or EF0 tornado, the weakest category, damages trees, but not substantial structures. An F5 or EF5tornado, the strongest category, rips buildings off their foundations and can deform large skyscrapers. The similar TORRO scale ranges from a T0 for extremely weak tornadoes to T11 for the most...