They both occur in the southern hemisphere. I know personally of a water spout ("tornado" over water) that then went onto land (becomes clasified as a tornado when over land) near Sydney Australia. Tornadoes though as far as I have known are not as frequent nor as severe in Ssouthern hemisphere. My guess is that in the northern hemisphere where you have larger land masses (US-Canada land mass, or Asian landmass) has a great deal with the cooling/warming of the atmosphere and directing the jetstream (which is requires to cause rotation in the atmosphere leading to tornado).
As for Typhoons they very much occur in the southern hemisphere. In Australia we call them Cyclones; in the US they are call huricanes.
2007-05-24 10:14:55
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answer #1
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answered by Steve T 2
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Well if you want to be technical, a 'typhoon' by name wouldn't be found in the southern hemisphere, because typhoons are the given name of a tropical cyclone in the North Pac. But literally, tropical cyclones (have many names - typhoon, cyclone, hurricane, etc) are found in both the northern and southern hemispheres. In the Atlantic, tropical cyclones stay mainly north of the equator. However in the Pacific and Indian oceans, tropical cyclones definitely form in the southern hemisphere, I monitor them at work :)
And tornadoes also occur in the southern hemisphere. They aren't nearly as prevalent as they are in the United States - we have just the right setup with the 'access' to cool, dry (polar) air and warm, moist (tropical) air. That setup happens best in the mid-latitudes (approx. 20-60 degrees latitude), which the US lies in between. If you take a look at a map of the Southern hemisphere, you'll notice the narrow part of South America, the southern tip of Africa, and southern Australia lie within that region - that's not much area to work with. At work, I plot current fronts every 3 hours, and I see that most of the low pressure systems and fronts pass over the southern areas of those continents, sometimes so far south they don't pass over land at all. It's not to say that tornadoes can't happen, because they have and they will continue to.
2007-05-26 21:27:04
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answer #2
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answered by Bean 3
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Tornados do take place south of the Equator, although not to the extent as in the northern hemisphere, nor as dramatic in impact there. The reason is quite complex, as tornados basically depend on two fundamental factors; ground temperature and cloud temperature, where usually in the northern hemisphere these tend to be on the extremes.
As for Typhoons, they basically are generated by oceanic temperature, ground temperature and wayward winds. The south pacific ocean currents are usually cool due the Humboldt cold water stream. Furthermore, the high Andes mountains do not allow for ocean generated winds and clouds to pass the coastal line. Unlike the north Atlantic ocean, where air currents are free of obstacles and the ocean waters and temperature/humidity of the atmosphere favor such events, the south Pacific and Atlantic oceans do not suffer from these particularities.
2007-05-24 15:23:07
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answer #3
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answered by Marinho 3
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They can and do occur in the southern hemisphere. Just not with the regularity that they do in the northern hemisphere. Northern Australia gets hit with a typhoon on occasion. If you notice, most of the land mass is in the northern hemisphere.
2007-05-24 20:23:22
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answer #4
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answered by DaveSFV 7
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Are you sure that's true? If it is, it might be because the North is looking for heat? Or is the tornado when they reject it?
2007-05-24 15:22:59
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answer #5
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answered by isis 4
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The event can happen, they just have different names in different parts of the world.
2007-05-24 17:44:17
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answer #6
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answered by Behaviorist 6
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My guess is theres no warm fronts there. And you need those to succesfully have one.
2007-05-24 15:22:21
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answer #7
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answered by Anonymous
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