what are some of the climatic conditions that lead to such storms?
Sufficiently warm sea surface temperatures,  atmospheric instability, high humidity in the lower to middle levels of the troposphere, enough Coriolis effect to develop a low pressure center,   a pre-existing low level focus or disturbance, and low vertical wind shear
Typhoon
ere are few main requirements for typhoon formation and development: (1) sufficiently warm sea surface temperatures, (2) atmospheric instability, (3) high humidity in the lower to middle levels of the troposphere, (4) enough Coriolis effect to develop a low pressure center, (5) a pre-existing low level focus or disturbance, and (6) a low vertical wind shear.
where do most hurricanes typhoons and cyclones originate Pacific ocean what kind of wind speed does it usually reach? A "typhoon" has wind speed of 64–79 knots (73–91 mph; 118–149 km/h)
wiki:12659038
Typhoon [SEP] Introduction
While the RSMC names each system, the main name list itself is coordinated among 18 countries that have territories threatened by typhoons each year. Within the northwestern Pacific, there are no official typhoon seasons as tropical cyclones form throughout the year. Like any tropical cyclone, there are few main requirements for typhoon formation and development: (1) sufficiently warm sea surface temperatures, (2) atmospheric instability, (3) high humidity in the lower to middle levels of the troposphere, (4) enough Coriolis effect to develop a low pressure center, (5) a pre-existing low level focus or disturbance, and (6) a low vertical wind shear.