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.

Typhoon Janis was the second of two consecutive systems to move over the Japanese archipelago, with Tropical Storm Irving preceding it.

[2] 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,[1] with the Japan Meteorological Agency (JMA) following suit at the same time.

Passing near Guam and moving into the Philippine Sea, the depression organized further[1] and was upgraded to a tropical storm at 18:00 UTC on August 3 by both the JTWC and JMA.

[6] 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.

[3] According to the JTWC, Janis entered a period of rapid deepening, intensifying 65 km/h (40 mph) during the day of August 5.

Operationally, the storm was believed to have attained winds 230 km/h (145 mph), based on Dvorak estimates from polar orbiting satellite imagery.

[1] After tracking towards the west-northwest during its early stages, Typhoon Janis turned towards the north-northeast[8] and passed 165 km (105 mi) east of Okinawa.

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).

[6] After its peak intensity, the typhoon began to weaken and accelerate as it recurved towards Kyushu; this turn was correctly predicted by the JTWC.

[6] Over Kyushu, land interaction took its toll on the typhoon,[1] and the JTWC and JMA downgraded Janis to tropical storm intensity on August 8.

[3] During its formative stages, Jannis brought winds gusting to 55 km/h (35 mph) and 64 mm (2.25 in) of rain in 24 hours to the island of Guam, but caused no major damage.

[1] As Janis passed to the east of Taiwan, one fisherman was killed, and six individuals were missing when 8 m (26 ft) waves sank five fishing boats.

A total of 19,855 houses in 17 municipalities, including Susaki, suffered a blackout after falling trees downed power lines.

[30] Heavy rain caused rivers alongside the Japan National Route 315 to overflow its banks, which resulted in street flooding.

[33] Further north, lightning strikes led to 5,500 units losing power in Wakabayashi-ku, 1,300 others on Ōshima Island, and 1,300 others on Yamamoto.

[36] Typhoon Janis was the final of two successive systems to move over the Japanese archipelago,[1] with Tropical Storm Irving preceding it.

[10] High winds and torrential rains caused the temporary loss of electricity to 350,000 homes across the southernmost of Japan's four main islands.