| The Atmosphere | |
Winds blow anti-clockwise in hurricanes north of the equator, but clockwise in the south. Hurricanes can cause a huge amount of heavy rainfall. One hurricane deposited enough rain on Baquio in the Philippines to cover the entire island in 1 metre (3 feet) of water.
To keep a hailstone suspended for the ten minutes or so necessary to produce a large hailstone, updraughts in excess of 30 metres per second (98 feet per second) are required.
There have been reports of living creatures, such as frogs falling to earth encased in hailstones, presumably having been swept up into the air initially by the powerful updraughts of a passing tornado. The highest ever waterspout seen was in 1898 in Australia. It was 1,528 metres (5,015 ft) high and 31 metres (10 ft) across. |
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