When do tornadoes occur?

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Tornadoes can form at any time of the year in any place susceptible to tornadoes. However, there is a "tornado season" in some countries when the vast majority of tornadoes occur. In the United States, most tornadoes occur between April and July, depending on the region of the country. In Canada, tornadoes tend to occur in June and July. In Australia, the tornadoes tend to occur from November to February, the warmer months in the southern hemisphere.

Where do tornadoes occur?

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Tornadoes have been documented on every continent except Antarctica. Tornadoes tend to occur in the middle latitudes in both hemispheres, between 30° and 50°. These latitudes are regions where the warmer subtropical warm air meets the colder polar air, with different wind speeds and direction. These conditions can produce rotating air masses.

What makes a tornado lose energy and die?

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Scientists also do not fully understand how tornadoes lose energy and die. Scientists do know that similar air temperature and similar air pressure must exist throughout both the tornado and the whole storm system that caused the tornado in order for the tornado to die.

How do tornadoes form?

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Scientists don’t fully understand exactly how tornadoes form, but the phenomenon has been heavily observed. When warm rising air (updraft) meets cooler sinking air (downdraft), and there is a change in wind direction and speed, a horizontal spinning effect can happen in a cumulonimbus cloud. If more updraft tilts the spinning air current from horizontal to vertical, a condensation funnel cloud (funnel-shaped cloud made of water droplets) may form.

What is a tornado?

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A tornado is a violently whirling column of air extending from the clouds to the ground. To be called a tornado, it must touch both clouds and ground; otherwise, it is simply a kind of cyclone. Tornadoes almost always extend from thunderstorm clouds called cumulonimbus clouds.

Most tornadoes travel at speeds up to 113 kph (70 mph), with the average speed being 48 kph (30 mph). The speed of the rotating winds of a tornado range from 104 kph (65 mph) to over 400 kph (250 mph).

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