the number of tornadoes that  occur on earth in the united staes each year is about what?
365692
The US averages around 900 tornadoes per year.\n\nSome years it is much higher. Increased hurricane activity sometimes causes a rise in tornadoes reported. So particularly active hurricane seasons will cause there to be more than normal.\n\n:)
909872
You like tornadoes.\n\nCoach
49011
http://www.windows.ucar.edu/tour/link=/earth/statistics.html
628631
It depends on when you want to chase them.  If you're chasing in the winter, go to the Dixie Alley or areas near the Gulf of Mexico.  If you're chasing in the Spring, go to tornado alley, which includes Oklahoma, Kansas, and Texas.  If you're chasing in the summer, go to Michigan, Ohio, New York, Pennslyvania, and Southern Ontario.  Southern Ontario is in Canada, but they do see a lot of tornadoes and severe storms during the summer.  Also Manitoba, Saskatchewan, and Alberta are also good.  They have less storms, but more random and possibly more Oklahoma style tornadoes.
356933
India is a very common place where tornadoes occur.\n\nOther ones include China, most middle-eastern countries (Iraq, Afghanistan, Pakistan), and northern Africa (Algeria, Egypt, Chad)\n\nIn general most places around 10-20 degrees above the equator.
189495
I know Canada gets hit by tornadoes and I'm sure some countries in Europe do also.
397369
http://www.bookfinder4u.com/search/Tornado.html\n\n\nyou should find it there..
410994
Although tornadoes can happen at any time of year, they are especially common during the spring and early summer. May and June are the peak months in terms of numbers of tornadoes, but April appears to be the deadliest month—an average of 27 tornado deaths occurred during this month between 1950 and 1999; and one of the all-time worst tornado disasters occurred on April 3-4, 1974, when 148 twisters struck 13 states causing more than 300 deaths.
234935
Short answer, they are called "tornado;" as you will see below, tornadoes usually rotate in a counter-clockwise direction in the northern hemisphere, clockwise in the southern.  In the rare event of it spinning in the opposite direction, which I believe was the nature of your question, it is called an "anticyclonic tornado."\n\nTornadoes normally rotate in a cyclonic (counterclockwise) direction in the northern hemisphere, as the warm air in which thunderstorms usually form sweeps north and jet streams come from the west, creating a situation in which the storms rotate. In the northern hemisphere, this rotation is counterclockwise, and in the southern hemisphere, clockwise. The tornadoes usually rotate the same way. Sometimes opposite direction swirls develop under a thunderstorm. About 1 in 100 tornadoes in the northern hemisphere rotate in an anticyclonic direction.\n\nI hope this helps.
35947
What causes tornadoes?\n\nThunderstorms develop in warm, moist air in advance of eastward-moving cold fronts. These thunderstorms often produce large hail, strong winds, and tornadoes. Tornadoes in the winter and early spring are often associated with strong, frontal systems that form in the Central States and move east. Occasionally, large outbreaks of tornadoes occur with this type of weather pattern. Several states may be affected by numerous severe thunderstorms and tornadoes.\n \nDuring the spring in the Central Plains, thunderstorms frequently develop along a "dryline," which separates very warm, moist air to the east from hot, dry air to the west. Tornado-producing thunderstorms may form as the dryline moves east during the afternoon hours. \nAlong the front range of the Rocky Mountains, in the Texas panhandle, and in the southern High Plains, thunderstorms frequently form as air near the ground flows "upslope" toward higher terrain. If other favorable conditions exist, these thunderstorms can produce tornadoes.\n\nTornadoes occasionally accompany tropical storms and hurricanes that move over land. Tornadoes are most common to the right and ahead of the path of the storm center as it comes onshore.
396017
In the US Midwest, tornadoes are usually formed when a cold, dry air mass moving south from Canada collides with a warm, moist air mass moving north from the Gulf of Mexico (or Baja California, or the Atlantic, or what have you). \nThis produces large thunderstorm clouds known as supercells, which can produce heavy rains, hail, and tornados. \nTornados are formed in areas of the supercell called mesocyclones; which draws air into the storm. When you hear meteorologists talk about the "hook echo" on the radar, they're pointing out the mesocyclone. The best simple explanation (so far) for why the tornado starts to rotate is the phenomenon of vertical wind sheer, where wind changes direction at different elevations.\nSo, if you have access to a weather radar; you can see hook echos like the one below. If you have a wind velocity view (some do, some don't), look for a large difference in wind speed and direction around that hook echo.
410200
Oklahoma has more real tornados per square mile than anywhere else in the world.  Florida has more per square mile, but most are F0 and F1, not enough to do anything.  Texas has more overall, but it's a bigger state.  According to the NOAA, Oklahoma City has had more tornados than any other city.
447507
The main hazards of a tornado include extremely high winds, flying debris, and sometimes the associated weather phenomena, such as large hail and heavy rain. The extremely high winds pick up debris, causing seemingly harmless things such as small pieces of styrofoam or wood to become lethal projectiles. The winds can also cause extensive structural damage. The storms associated with tornadoes also bring hazards such as baseball-sized hail and intense rain around the vicinity of the tornado.
629850
The normal huge storms on coastal areas around the world....this year.\n\nLarge earthquake.......Asia....2007\n\nSome big volcano news in Pacific Rim....2008.\n\nA scary encounter with an asteroid...near miss....2009.\n\nA major drought scattered world-wide......2010-2012.
481590
Tornadoes are created from severe Thunderstorms. They occur when a high pressure front meets head on with a low pressure front. No where is this more evident than in our mid-west, otherwise known as tornado alley, from the Canadian provinces to the Gulf of Mexico. Here, the Siberian express from Canada meets the warm tropical front from the Gulf of Mexico.
1135280
Oklahoma antlers had the worst tornado in oklahoma history 69 people died at the result of it. that happen in 1945
17464
Fort Worth got a tornado go straight through downtown a few years back.\n\nAccording to this map: http://en.wikipedia.org/wiki/Image:Tornado_Alley.jpg\nFort Worth, Oklahoma City and Tulsa have the highest number of tornadoes observed, with a wide band across the states from Illinois to the DFW area being the "Tornado Alley"\n\nNote that hurricanes near populated areas are more likely to be observed, which accounts for the island style distribution.