Bạn đang đọc: What’s the difference between a hurricane and a tornado?
Tornadoes are typically no more than a few hundred feet wide — although one tornado that touched depressed in central Oklahoma in 2013 was more than two miles wide. Hurricanes can last for days or even weeks. Tornadoes normally end no more than a few minutes .
How and when do hurricanes form?
Hurricanes shape over the Atlantic and Pacific oceans, near the equator and far from nation. “ Their energy source is the warm ocean waters, ” says Richard Pasch, a senior hurricane specialist at the National Hurricane Center in Miami. A hurricane typically starts as a roll of low-pressure air out in the strong, moisture-rich standard atmosphere over the tropical ocean. The assembly storm draw in warm atmosphere and water system vaporization as it rises and grows, forming thunderclouds and starting to rotate in reply to Earth ’ sulfur rotation. This satellite persona provided by NOAA shows Hurricane Florence on the eastern coast of the United States on Sept. 14, 2018. NOAA via AP file In the Northern Hemisphere, hurricanes spin counterclockwise and are typically driven approximately northwestern by the trade wind winds. In the Southern Hemisphere, these storms rotate clockwise. Hurricanes are called typhoons in Asia and the westerly Pacific, and cyclones in Australia and the indian Ocean. Most hurricanes hit the U.S. in summer and early drop, when the Northern Hemisphere ’ south oceans are warmest. During a typical Atlantic hurricane season, which runs from June 1 to Nov. 30, an average of 12 hurricanes hit the United States along the coast of the Gulf of Mexico or the Atlantic seashore .
How and when do tornadoes form?
Tornadoes, or twisters, form over land during alleged supercell thunderstorms, which produce brawny updrafts of hoist that twist as they rise, says Bill Bunting, the headman of bode operations at the National Weather Service ’ s Storm Prediction Center in Norman, Oklahoma. Under certain conditions, the updrafts of a supercell storm narrow to form a quickly eddy funnel cloud — and then a tornado. Bunting says the conditions that encourage the geological formation of tornadoes — including the collision of warm, humid breeze and cold, dry air — prevail between March and early June across what ’ s normally referred to as Tornado Alley, an sphere that spans parts of Texas, Oklahoma, Kansas, Nebraska and South Dakota. But tornadoes can form at any time of year and in any sphere.
This aerial visualize shows crack wrong in Jefferson City, Missouri on May 23, 2019. Jeff Roberson / AP occasionally, tornadoes form over water to form twisters known as waterspouts .
How fast are a hurricane’s winds?
Hurricanes are rated on a five-point scale known as the Saffir-Simpson Hurricane Wind Scale. class 1 hurricanes produce suffer winds of 74 to 95 miles per hour — adequate to break tree branches and cause minor price to buildings and other structures. Category 2 hurricanes ( with sustained winds of 96 to 110 miles per hour ) can cause grave damage to houses. Category 3 hurricanes ( with sustained winds of 111 to 129 miles per hour ) can uproot trees and down power lines and damage buildings. class 4 hurricanes ( 130 to 156 miles per hour winds ) can tear the roof off houses. The most dangerous hurricanes, rated Category 5, produce confirm winds of 157 miles per hour or more. These storms can destroy houses and make entire areas uninhabitable for weeks or months .
How fast are a tornado’s winds?
Tornadoes are rated according to a six-point scale known as the Enhanced Fujita Scale. EF-0 tornadoes produce wreathe gusts of 65 miles per hour to 85 miles per hour — enough to break tree branches. EF-1 tornadoes produce gusts of 86 miles per hour to 110 miles per hour — enough to damage buildings. EF-2 tornadoes produce gusts of 111 to 135 miles per hour — adequate to tear off roof. EF-3 tornadoes produce gusts of 136 to 165 miles per hour — adequate to lift cars and trucks off the ground. EF-4 tornadoes produce gusts of 166 to 200 miles per hour — enough to destroy houses. The most knock-down tornadoes, rated EF-5, produce gusts in excess of 200 miles per hour. They can sweep away bridges and topple improbable buildings .
Can hurricanes and tornadoes happen together?
Hurricanes frequently spawn tornadoes as they make landfall. That was the casing in 2017, when the Category 5 Hurricane Irma slammed into the Florida Keys. damage caused by Hurricane Michael is seen in Mexico Beach, Florida, on Oct. 16, 2018. Terray Sylvester / Reuters file
How does climate change affect hurricanes and tornadoes?
Studies suggest that mighty hurricanes will become more common as the climate warms, though Pasch says meteorologists seaport ’ thymine even detected any uptick. Hurricanes could besides dump more rain, raising the gamble of austere flood, in a heater climate.
Bunting says it ‘s excessively early to tell if climate change is making a difference in the frequency and severity of tornadoes. He says U.S. records of tornadoes go back only to 1950, with detail records made only in recent years. “ There are limitations of the tornado database that make it hard to in truth answer that interrogate, ” he says .
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