High Winds
High winds are known to cause damage, depending upon their strength.
Wind speeds as low as 23 knots (43 km/h) may lead to power outages when tree branches fall and disrupt power lines. Some species of trees are more vulnerable to winds. Trees with shallow roots are more prone to uproot, and brittle trees such as eucalyptus, sea hibiscus, and avocado are more prone to branch damage.
Wind gusts may cause poorly designed suspension bridges to sway. When wind gusts harmonize with the frequency of the swaying bridge, the bridge may fail as occurred with the Tacoma Narrows Bridge in 1940.
Hurricane-force winds, caused by individual thunderstorms, thunderstorm complexes, tornadoes, extratropical cyclones, or tropical cyclones can destroy mobile homes and structurally damage buildings with foundations. Winds of this strength due to downslope winds off terrain have been known to shatter windows and sandblast paint from cars.
Once winds exceed 135 knots (250 km/h) within strong tropical cyclones and tornadoes, homes completely collapse, and significant damage is done to larger buildings. Total destruction to man-made structures occurs when winds reach 175 knots (324 km/h). The Saffir-Simpson scale for cyclones and Enhanced Fujita scale (TORRO scale in Europe) for tornados were developed to help estimate wind speed from the damage they cause.
Read more about this topic: Severe Weather
Famous quotes containing the words high and/or winds:
“Like all high functionaries, he deemed it indispensable religiously to sustain his dignity; one of the most troublesome things in the world, and one calling for the greatest self-denial.”
—Herman Melville (1819–1891)
“There was never a revolution to equal it, and never a city more glorious than Petrograd, and for all that period of my life I lived another and braved the ice of winter and the summer flies in Vyborg while across my adopted country of the past, winds of the revolution blew their flame, and all of us suffered hunger while we drank at the wine of equality.”
—Norman Mailer (b. 1923)