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Tornado Wind Speeds

Tornado wind speeds may reach 100 to 300 mph and cause havoc on the ground. But tornadoes typically last only a few minutes and rarely travel more than 10 or 20 miles along the ground.

Tornadoes have little impact on storms that spawn them or collectively on the global circulation of the atmosphere. Hurricanes, on the other hand are large-scale circulations that are 60 to over 1,000 miles across.

Hurricanes form near the Equator, generally between 5 and 20 degrees latitude, but never right on the Equator. Hurricanes always form over the warm waters of the tropical oceans and generally where the sea-surface temperature exceeds 26.5°C (76°F).

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A hurricane may travel thousands of miles and persist over several days or weeks. During its lifetime, a hurricane will transport a significant amount of heat up from the ocean surface and into the upper troposphere or even lower stratosphere.

Even though hurricanes form only sporadically, they do affect the global atmosphere's circulation in measurable ways, although this is still an active area of research.

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