Therefore, the material of extratropical cyclone weather and climate are very important to choosing interocean routes. 因此，温带气旋的天气气候资料在越洋航线选择时具有重要价值。
Rammasun became an extra-tropical cyclone in a baroclinic environment over the western North Pacific to the southeast of Japan on 13 May. 威马逊于五月十三日在斜压环境下在日本东南的北太平洋西部上转化为温带气旋。
