Down!
Why is a typhoon a downdraft?
The cloud wall around the eye of the typhoon develops very high upward, reaching the tropopause, and even passing through the tropopause to the stratosphere. The updrafts in the cloud wall are very strong, and the air in the upper cloud tops is anticyclonic. Shape flow strengthens the convection effect within the cloud, and the lower airflow circles into the center in the form of a cyclone. The air in the eye of the typhoon sinks, so it is almost cloudless and dry except at low levels. One of the conditions for the formation of the eye is centrifugal force. In order to compensate for the air leaving the center, the air falls from a high place, forming a so-called downdraft. There are also updrafts in clouds and rain outside the cloud wall, which are far less vigorous than those in the cloud wall. The development of clouds gradually weakens from the center outward. The eye of a typhoon is generally tens of kilometers in diameter. The circular, quasi-cloud-free area near the center of the typhoon observed by rockets, satellites, radars and aircraft is the eye of the typhoon. The center of the typhoon is at the center of this area, where the air pressure is the lowest in the entire typhoon, and the wind is weak or almost calm. Generally speaking, the lower the air pressure at the center of the typhoon, the greater the intensity of the typhoon. The maximum wind speed occurs in the deepest cloud wall outside the typhoon eye. Since there is the strongest updraft, it is also the area with the heaviest rainfall.