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What is the tornado air pressure?

The air pressure in a tornado is lower than that of its surrounding but the pressure difference varies with the strength of the tornado. The greater the pressure difference, the stronger the tornado. The greatest pressure drop recorded from a tornado was 100 millibars or about 10%.


A tornado's funnel cloud results when?

A tornado's funnel cloud forms when warm, moist air rises rapidly and creates a rotating column of air. This spinning motion causes the air to condense into a funnel shape, which is visible as the iconic tornado funnel cloud.


How big is Tornado Alley?

Tornado Alley is approximately 500,000 square miles in size. It covers parts of several US states, including Texas, Oklahoma, Kansas, and Nebraska.


Does a tornado or a hurricane have the steepest pressure gradient?

Definitely a tornado. A hurricane produces a large pressure drop over a distance of hundreds of miles. A tornado produces a similar, possibly larger pressure drop over only a few hundred feet.


What is the barometric pressure before a tornado?

It is not know for certain. One thing that is known is that the pressure is low inside a tornado. The intensity of a tornado is largely determined by the pressure deficit, meaning how much lower the pressure inside the tornado than its surroundings. It is estimated, that a strong tornado will have a pressure deficit of at least 25 millibars, so that if the pressure surrounding the tornado is 950 millibars, the core pressure will be 925 millibars. A violent tornado may have a pressure deficit of over 100 millibars.