Wednesday, April 29, 2009

Southern Hemisphere tornadoes

Today's "Ask Mike" question is "Do tornadoes spin clockwise in the southern hemisphere? and does the southern hemisphere have tornadoes in the first place?"

and the answer is.......

In general, tornadoes, being low-pressure systems or "cyclones" generally spin counterclockwise in the northern hemisphere (not all, but most) because of coriolis effect, which causes moving objects to deviate to the right in the northern hemisphere and to the left in the southern hemisphere.

It's just the opposite in the southern hemisphere. Low pressure systems (cyclones) spin clockwise south of the equator, and so do most of the tornadoes....and yes, countries in the southern hemisphere DO experience tornadoes.

A few on the list include Australia, New Zealand, South Africa, Paraguay, Uruguay, Argentina, Colombia and Chile.

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