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There are a few mechanisms. First, the wind going over the upward-pointing roof creates and upward force owing to Bernoulli's principle. The wind may also catch the roof under the eaves or cause a gable to fall inward and pick up the roof from below.

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When does the tornado siren go off?

Tornado sirens go off when a tornado warning is issued and during their monthly test.


How can a tornado affect a structure?

Flying debris can shatter windows and doors. If the tornado is strong enough, it can blow the roof right off of a building or knock down walls. In the worst cases, structures can be leveled to the ground or even completely blown away. The severity of damage can be rated on the Enhanced Fujita (EF) scale. See the related link(s) listed below for more information:


What can a tornado do to a house?

The degree of damage varies widely. Weak tornadoes can peel away roof tiles and siding and break windows. Strong tornadoes can rip away roofs and walls, sometimes shifting houses off their foundations. Violent tornadoes can levels houses to the ground, or even completely blow them away.


What damage can an F1 tornado do?

An F1 tornado can cause moderate damage, including breaking branches off trees, damaging roofs, overturning mobile homes, and moving automobiles. While it is considered a weak tornado on the Enhanced Fujita scale, it can still be dangerous and pose a threat to people and property.


Why are houses made of wood in Saint Lucia?

It's because there are many tropical storms there so they might blow the roofs off.


How do tornadoes lift roofs off building using Bernoulli's principle?

Tornadoes lift roofs off buildings mainly through the combination of strong winds and pressure differences created by the swirling vortex of air. Bernoulli's principle plays a role by contributing to the lowering of pressure above the roof, creating lift force. This, along with the internal pressure of the building, can lead to the roof being lifted off during a tornado event.


What are roofing ties?

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Are trailer homes safe to live in?

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What is an EF2 tornado?

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Did the shingles blow off the roof during the storm?

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What is the wind speed of an EF1 tornado?

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What effect can a tornado have on property?

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