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Typhoon Faxai

Pacific typhoon in 2019

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Through Atmospheric pressure

Three people were killed and 147 others were injured. More than 390,000 people were urged to be evacuated. Faxai left 934,000 households without power. Train services in JR East were cancelled due to the storm. Two people died from heatstroke because of the power outage. Total loss in Japan were finalized at US$10 billion.

Meteorological history

On August 30, 2019, a tropical disturbance formed approximately 1,402 km (871 mi) east-northeast of Kwajalein in the Marshall Islands, and was marked as Invest 90W by the Joint Typhoon Warning Center (JTWC). A broad overcast obscured the system's circulation whilst thunderstorms or convection developed to the northwest of the system. The disturbance continued to stockpile deep convection over very warm sea surface temperatures of 31 to 32 °C (88 to 90 °F) and low vertical wind shear, conditions which are conducive for further tropical cyclogenesis. By September 1, the JTWC announced a Tropical Cyclone Formation Alert as the system began to develop rainbands extending to the north. The system was designated Tropical Depression 14W by the JTWC at 18:00 UTC on that same day. The Japan Meteorological Agency (JMA) later recognize the system as a tropical depression early on September 2. As the depression passed just southwest of Wake Island, the JTWC estimated that the system had intensified into a tropical storm at 18:00 UTC, though the JMA still kept the classification as a tropical depression by that time. While maintaining the tropical storm strength according to the JTWC, the system strolled westward then west-northwestward alongside a subtropical ridge for the course of two days.

During September 4, the JMA upgraded the system to a tropical storm, assigning the name Faxai. On the following day, deep convection was displaced to the east of the partially-exposed circulation. A tropical upper tropospheric trough (TUTT) cell to the northwest with troughing to the south of it induced strong subsidence to the west of the system. It weakened westward outflow, hindering development from atop, though another TUTT cell to the east provided ventilation for the shifted convection. Later on September 5, the circulation moved underneath the convection. The TUTT cell to the northwest weakened on September 6, allowing poleward outflow to develop. At 06:00 UTC, Faxai attained severe tropical storm status from the JMA. As Faxai organized its convection, it began to develop an eye feature. Faxai later intensified into a typhoon as according to Dvorak estimates by the JTWC; the JMA did not upgrade the storm's status until 00:00 UTC of September 7. Owing to the favorable conditions, Faxai underwent rapid intensification, attaining 1-minute sustained winds of 195 km/h (120 mph). The eye had expanded to 28 km (17 mi), surrounded by 170 km (100 mi) of compact convection in the center. By 18:00 UTC, Faxai had attained its peak intensity; the JMA assessed 10-minute sustained winds at 155 km/h (100 mph) and the lowest barometric pressure at 955 hPa (28.20 inHg), and the JTWC estimated 1-minute sustained winds of 215 km/h (130 mph), equivalent to a Category 4 hurricane. Sustained by low vertical wind shear and radial outflow, the storm maintained its intensity for 12 hours.

On September 8, Faxai weakened for the onset of an eyewall replacement cycle. The subtropical ridge steered Faxai east-northeastward after having its northwestern periphery eroded by the westerlies. In 18:00 UTC, Faxai made landfall above the Kantō Plain with 1-minute winds of 165 km/h (105 mph). Entering a region of cooler waters, Faxai began to weaken significantly. It fell below typhoon strength at 12:00 UTC. As the storm accelerated at 31 km/h (20 mph) by September 10, it embedded with the baroclinic zone, commencing the transition into an extratropical cyclone. In 18:00 UTC, the storm had transformed into a cold-core low of gale-force, with wind force that extended 1,500 km (920 mi) east of Misawa Air Base. It continued to shift east-northeastward, crossing the International Date Line on September 11, before dissipating by 18:00 UTC of that day.

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