How long does the typhoon eye usually last?

Typhoon eye usually lasts for an hour or two.

The eye of the wind is usually in sunny and partly cloudy areas, with less stratocumulus and weak wind. But around the eye of the typhoon, the wind speed will increase rapidly until it reaches the maximum. The typhoon center is moving. Generally speaking, the typhoon eye will stay in one place for about one to two hours. However, this calm will be immediately replaced by a typhoon, and a moment's pause will give people an illusion and relax their vigilance. When the eye of the typhoon moves, the ensuing storm may bring even greater disasters.

If you are in the eye of a typhoon, you must find a place to protect yourself in time to prevent injury. When you are at sea, although the clouds in the center of the typhoon eye are less and the wind is less, the swell coming from a distance will be great and the sea surface will not be calm, so you must not treat the typhoon eye lightly.

Typhoon development mechanism

The warm core is formed by the convergence and rising of a large number of wet air flows at low altitude, and the latent heat of condensation released by the middle and high levels heats the air. Some scholars put forward the theory of "the second conditional instability" mechanism.

This theory holds that when the conditions in the middle and lower tropical troposphere are often unstable and cyclone circulation occurs at low altitude, friction can cause friction convergence in the atmospheric boundary layer, so that water vapor can be transported upward through the top of the boundary layer and condensed in the middle and upper parts, and the released latent heat will warm the center; At this time, the ground pressure drops and the cyclone circulation strengthens, which further promotes friction convergence and water vapor upward, and then continues to heat the upper troposphere, and the ground pressure continues to drop.

This cycle forms a typhoon. Some scholars have put forward some different views on the above theory, and think that the energy of typhoon warming mainly comes from the adiabatic warming effect when the cloud sinks, not from the heating of latent heat of water vapor condensation in convective clouds. One of the facts is that in the typhoon stage, the typhoon center is often not in the convective cloud area, but in the clear sky area outside the cloud.