typhon Surigae

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Typhoon Surigae, known in the Philippines as Super Typhoon Bising, was the strongest Northern Hemisphere tropical cyclone to form in the first four months of the calendar year. The second named storm, first typhoon and first violent typhoon of the 2021 Pacific typhoon season, Surigae was the strongest tropical cyclone worldwide in 2021. The storm originated from a low-pressure area south of the Micronesian island of Woleai. The low organized into a tropical depression on April 12. At 18:00 UTC that day, it strengthened into a tropical storm and was named Surigae by the Japan Meteorological Agency (JMA). Very favorable environmental conditions then allowed Surigae to begin a bout of rapid intensification after becoming a typhoon on April 15; by April 17, the storm reached its peak intensity with 10-minute sustained winds of 220 km/h (140 mph), 1-minute sustained winds of 315 km/h (195 mph), and a minimum pressure of 895 hPa (26.4 inHg). Afterward, weakening outflow and an eyewall replacement cycle caused Surigae to gradually weaken as its track shifted north-northwestward in the Philippine Sea. Following the eyewall replacement cycle, Surigae became an annular tropical cyclone on April 19, and restrengthened slightly. On April 22, the storm began to rapidly weaken as it accelerated northwestward into unfavorable environmental conditions, transitioning into a subtropical storm the next day. The subtropical system subsequently underwent extratropical transition, which it completed by April 24. Three days later, Surigae's remnant explosively intensified into a bomb cyclone near the Aleutian Islands, attaining hurricane-force winds. Afterward, the system gradually weakened as it turned eastward, crossing the International Date Line on April 30 and fully dissipating that same day. Upon Surigae's naming, watches and warnings were issued for the island of Yap in the Federated States of Micronesia and the islands of Koror and Kayangel in Palau...