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Typhoon Vernon

Meteorological history
Forming east of the Mariana Islands while Typhoon Tasha struck China and Typhoon Keoni was moving over open water, Vernon originated from an area of deep convection embedded within the monsoon trough north of Pohnpei that was first observed by the Joint Typhoon Warning Center (JTWC) on the morning of August 18. At 17:00 UTC on August 20, following an increase in the system's convection, the JTWC issued a Tropical Cyclone Formation Alert. Midday on August 21, the Japan Meteorological Agency (JMA) upgraded the system into a tropical depression. Following an increase in organization and a Dvorak intensity estimate of T1.5/30 mph, the JTWC followed suit and declared the system a tropical depression at the same time. Early the next morning, a Dvorak estimate of T2.5/40 mph resulted in the JTWC upgrading the depression into Tropical Storm Vernon. At 06:00 UTC on August 22, the JMA upgraded Vernon into a tropical storm.

After tracking north-northwest for 18 hours, Vernon briefly turned west on August 22 as it gradually intensified. The JMA upgraded Vernon into a severe tropical storm at noon on August 23. Following a Dvorak intensity estimate of T4.0/75 mph, the JTWC upgraded Vernon into a typhoon at 00:00 UTC on August 24, although the JMA did not follow suit until 30 hours later. Continuing to intensify, Vernon tracked west-northwest. Late on August 24, the JTWC estimated that Vernon obtained its peak intensity of 90 mph. At noon the next day, the JMA estimated that the typhoon reached its peak wind speed of 80 mph and a minimum barometric pressure of 965 mbar. Tracking northwest, the storm, according to the JMA, maintained its peak intensity for 15 hours before starting to weaken and undergo extratropical transition. Vernon began to recurve the north-northwest, passing east of Toyko and skirting Honshu on August 27. Both the JTWC and JMA reported that Vernon weakened below typhoon intensity that day. At 00:00 UTC on August 28, the JTWC declared Vernon an extratropical cyclone. At the time, the system was located in the Sea of Okhotsk. Three hours later, the JMA followed suit, although they continued to track the storm until the evening of August 30.

Impact
The cyclone dropped heavy rainfall across northern portions of the Japanese archipelago. A total of 340 mm occurred on Mount Zaō, most of which fell within a 24 hour period. A peak hourly rainfall total of 64 mm was observed in Toyko. Meanwhile, a peak wind gust of 76 km/h was recorded in Miyake-jima.