page_title: Typhoon Janis (1992)
section_title: Meteorological history
hierarchical_section_title: Typhoon Janis (1992) / Meteorological history
caption_attribution_description: Saffir-Simpson Hurricane ScaleTDTS12345 English: Typhoon Janis 1992 track. Uses the color scheme from the Saffir-Simpson Hurricane Scale.
context_page_description: Typhoon Janis, known in the Philippines as Typhoon Gloring, was an early-season typhoon that struck Japan during August 1992. An area of disturbed weather formed near Pohnpei in late-July 1992, and after an increase in thunderstorm activity, a tropical depression developed on August 3. After passing near Guam, Janis tracked generally westward, and on August 5, the storm was believed to have attained typhoon intensity. After intensifying at a brisk pace, Janis attained peak intensity on August 6 near Okinawa. Thereafter, the typhoon began to weaken and accelerate as it recurved towards Kyushu, where it made landfall on the next day. Land interaction took its toll on the typhoon as it tracked northeast, paralleling the western coast of Honshu. On August 9, Janis transitioned into an extratropical low over Hokkaido.
  Five fishing boats sank offshore Taiwan, where one fisherman was killed, and six others were listed missing. Typhoon Janis was the second of two consecutive systems to move over the Japanese archipelago, with Tropical Storm Irving proceeding it. Nationwide, twelve fatalities were reported and another was initially reported as missing.
context_section_description: The tropical disturbance that would later mature into Typhoon Janis formed near Pohnpei in the eastern Caroline Islands towards the end of July 1992. At 06:00 UTC on July 30, the Joint Typhoon Warning Center (JTWC) started tracking the system. Increased convective development led to the issuance of a Tropical Cyclone Formation Alert at 13:00 UTC on August 2. Intensification continued through the morning hours, and at 00:00 UTC, the JTWC issued the first warning on Tropical Depression 10W, with the Japan Meteorological Agency (JMA) following suit at the same time. At 14:39 UTC, a Hurricane hunter aircraft was able to identify a well-defined center as well as winds of 55 km/h (35 mph). Passing near Guam and moving into the Philippine Sea, the depression organized further and was upgraded to a tropical storm at 18:00 UTC on August 3 by both the JTWC and JMA. At around this time, the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) also monitored the storm and assigned it with the local name Gloring. Midday on August 4, the JMA classified Janis as a severe tropical storm. Six hours later, Janis was declared a typhoon by the JTWC, with the JMA doing the same at 00:00 UTC on August 5. According to the JTWC, Janis entered a period of rapid deepening, intensifying 65 km/h (40 mph) during the day of August 5. At 00:00 UTC on August 6, the JTWC increased the intensity of the storm to 215 km/h (130 mph), equivalent to a low-end Category 4 hurricane on the United States-based Saffir-Simpson Hurricane Wind Scale. Operationally, the storm was believed to have attained winds 230 km/h (145 mph), based on Dvorak estimates from polar orbiting satellite imagery. However, in post-storm analysis, the JTWC determined that due to the high resolution of the satellite, the eye temperature of the storm was overestimated, prompting the agency to revise its Dvorak methods to better match intensity estimates derived from geostationary satellites.
  After tracking towards the west-northwest during its early stages, Typhoon Janis turned towards the north-northeast and passed 165 km (105 mi) east of Okinawa. The JTWC estimated that Janis leveled off in intensity. However, the JMA estimates that Janis was still strengthening, and did not attain its highest intensity until 18:00 UTC on August 6, when the agency reported winds of 175 km/h (110 mph) and a barometric pressure of 935 mbar (27.61 inHg). After its peak intensity, the typhoon began to weaken and accelerate as it recurved towards Kyushu; this turn was correctly predicted by the JTWC. At the time of landfall on Kyushu late on August 7, the JTWC and JMA estimated winds of 175 km/h (110 mph) and 135 km/h (85 mph) respectively. Over Kyushu, land interaction took its toll on the typhoon, and the JTWC and JMA downgraded Janis to tropical storm intensity on August 8. The tropical storm moved to the northeast, paralleling the western coast of Honshu. At noon on August 9, Janis transitioned into an extratropical low over Hokkaido. It was lasted noted by the JMA around noon on August 13 near the International Date Line.
caption: Map plotting the track and the intensity of the storm, according to the Saffir–Simpson scale
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