How are tornadoes classified?

A tornado is a rapidly rotating column of air extending from a thunderstorm to the surface of the Earth. What is a tornado and what causes it? A tornado or twister is a narrow, violently rotating column of air. It is usually attached to the base of a thunderstorm, ... Tornadoes are the world's most violent atmospheric storms. They are narrow, violently rotating columns of air extending from the base of a thunderstorm to the ... Tornadoes develop from severe thunderstorms in warm, moist, unstable air along and ahead of cold fronts. Such thunderstorms also may generate large hail and ... For someone trapped inside a tornado, they should be able to see a circular opening at the top that is about 50 to 100 feet wide, and around half a mile in ... This preparedness guide explains tornadoes, their associated hazards, and steps that you can take to protect yourself, your family, your home, and your business ... There is no such thing as guaranteed safety inside a tornado. Freak accidents happen; and the most violent tornadoes can level and blow away almost any house ... Aug 4, 2020 ... A tornado watch is typically issued hours in advance by NOAA's Storm Prediction Center (SPC). It means that conditions are ideal for a tornado ... using a deterministic analysis of NOAA tornado data to correlate the mapped frequency of strong tornadoes with four tornado wind speed zones: 250 mph, 200 ... Tornadoes are violently spinning, funnel-shaped columns of air that stretch from the dark thunderclouds they form in all the way to the ground.