Quote:
Originally Posted by PCH
How can the wind be strong enough to blow down that tree, - yet leave the colorbond fence standing a few meters away?
Strange!
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At ground level all sorts of things disturb flow but above the ground the full force of the wind can hit the tree which has a large surface area exposed to the wind. This is typical of turbulent flow. Rain also loosens the earth and root hold around the tree. Large trees become a lever when the wind presses againt it and exerts force on the roots. We had a large tree toppled by the wind on my street and it fell on a cubby house and a colour bond fence which up to that point had not been damaged.