Three typhoons active near Japan as Typhoon 27 moves north, JMA says
Version 2: On Oct. 6, the three typhoons remained active and the Japan Meteorological Agency maintained high-wave warnings for Ogasawara, the Izu Islands and the sea off Kanto into Oct. 7; Livedoor News reported it was the first October triple typhoon in five years and gave forecast wave heights and model tracks suggesting Typhoon 28 may U-turn and Typhoon 29 may follow a path similar to Typhoon 27.
In short
The Japan Meteorological Agency announced on Oct. 5 that Typhoon 28 (Nolo) and Typhoon 29 (Koguma) had formed, making three active typhoons near Japan with Typhoon 27 (Choi-wan). Typhoon 27 was large and very strong, moving north-northwest near the Ogasawara Islands at about 20 km/h with a central pressure of 925 hPa, and the agency warned of high waves and strong winds. Typhoon 27 was not expected to bring heavy rain or storm winds to Honshu, but high waves were possible from Chiba to Tohoku through Oct. 7, and the three typhoons were still active on Oct. 6.
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The Japan Meteorological Agency announced on Oct. 5 that Typhoon 28 (Nolo) and Typhoon 29 (Koguma) had formed, creating a triple typhoon together with Typhoon 27 (Choi-wan) in seas near Japan. TBS NEWS DIG reported that it was the first time in five years that three typhoons were active at once in October, and that Typhoon 28 was the first crossing typhoon in three years. Jiji Press reported that Typhoon 28 formed after a hurricane near the Midway Islands crossed the date line, while Typhoon 29 formed near the Marshall Islands. [ 5 , 12 , 16 , 29 , 30 ]
Typhoon 27 was large and very strong. As of 9 a.m. on Oct. 5 it was near the Ogasawara Islands, moving north-northwest at about 20 km/h, according to JMA bulletins cited by TBS and Jiji Press. Jiji reported a central pressure of 925 hPa, a maximum wind speed of 50 meters per second and a maximum gust of 70 meters per second, with a storm area extending 220 km east and 165 km west and a strong wind area extending 850 km east and 560 km west. The agency called for caution against high waves through Oct. 6 and also warned of strong winds. The Ogasawara Islands were told to watch high waves accompanied by swells. [ 1 , 3 , 8 , 12 , 13 , 15 ]
Typhoon 28, described as very strong, was moving west near the Midway Islands at about 30 km/h, and TBS reported a central pressure of 950 hPa as of noon on Oct. 5. Jiji said both Typhoon 28 and Typhoon 29 could move near Minamitorishima. Nippon TV reported that Typhoon 28 was expected to be near Minamitorishima on Oct. 9 and east of Japan on Oct. 10, but that whether it would approach Honshu was still unclear. Typhoon 29 formed at 9 a.m. on Oct. 5 near the Marshall Islands and was moving northeast; it was forecast to become a strong typhoon near Minamitorishima on Oct. 9. [ 8 , 10 , 12 , 15 , 20 ]
Typhoon 27 was expected to move north off the east of Honshu, away from land, so heavy rain and storm winds were not expected in Honshu, according to TBS and Nippon TV. TBS said warning-level high waves were possible from Chiba to Tohoku on the Pacific side through the morning of Oct. 7. The Japan Meteorological Agency warned of swells and heavy seas for the Ogasawara Islands until before noon on Oct. 6, for the Izu Islands from after noon to late night on Oct. 6, and for the sea off Kanto from the evening of Oct. 6 to early on Oct. 7. Livedoor News listed forecast wave heights of 6 meters for Kanto and the Izu Islands and 7 meters for Ogasawara on Oct. 6, and 6 meters for Kanto and 5 meters for the Izu Islands on Oct. 7. [ 7 , 15 , 25 , 30 , 31 ]
As of 3 a.m. on Oct. 6, the three typhoons were still active, and the Japan Meteorological Agency again called for high wave caution on Oct. 6. The agency's weekly forecast for Oct. 6 to Oct. 12 called for many sunny or cloudy days in northern and eastern Japan, some rain in western Japan toward the weekend, and cloudy weather in Okinawa and Amami. TBS reported that the Oct. 10-12 three-day weekend could be affected depending on the typhoons' paths and development. Livedoor News reported that Ogasawara could be affected from the Oct. 10 weekend onward, that most forecast models showed Typhoon 28 turning west and U-turning while Typhoon 29 took a path similar to Typhoon 27 east of Japan, and advised people not to approach the sea. [ 14 , 19 , 30 , 31 ]
Why it matters
The simultaneous presence of three typhoons is unusual; TBS reported it was the first time in five years that three typhoons were active at once in October, and that Typhoon 28 was the first crossing typhoon in three years. The storms could affect the Oct. 10-12 three-day weekend and Pacific maritime conditions, but forecast circles remained large and the degree of impact on the Japanese archipelago was still unclear.
Key facts
- The Japan Meteorological Agency announced on Oct. 5 that Typhoons 28 (Nolo) and 29 (Koguma) had formed, making three active typhoons near Japan with Typhoon 27 (Choi-wan). [ 5 , 12 , 16 , 29 ]
- Typhoon 27 was large and very strong, moving north-northwest near the Ogasawara Islands at about 20 km/h as of 9 a.m. on Oct. 5, with a central pressure of 925 hPa. [ 3 , 8 , 12 ]
- Typhoon 28 formed from a hurricane that crossed the date line near the Midway Islands, and Typhoon 29 formed at 9 a.m. on Oct. 5 near the Marshall Islands. [ 9 , 12 , 29 , 30 ]
- The Japan Meteorological Agency called for caution against high waves and strong winds as Typhoon 27 moved north, warning Ogasawara, the Izu Islands and the sea off Kanto of swells and heavy seas through Oct. 7. [ 1 , 12 , 15 , 25 , 31 ]
- Typhoon 27 was expected to move north off the east of Honshu away from land, with no expected heavy rain or storm winds for Honshu, but high waves were possible from Chiba to Tohoku on the Pacific side through the morning of Oct. 7. [ 7 , 15 ]
- TBS reported it was the first time in five years that three typhoons were active at once in October, and that Typhoon 28 was the first crossing typhoon in three years. [ 16 , 22 , 30 ]
- As of 3 a.m. on Oct. 6, the three typhoons were still active, and the Japan Meteorological Agency again called for high wave caution on Oct. 6. [ 30 , 31 ]
- Livedoor News reported that most forecast models showed Typhoon 28 turning west and U-turning while Typhoon 29 took a path similar to Typhoon 27 east of Japan. [ 30 ]
Confirmed by several sources
- The Japan Meteorological Agency announced on Oct. 5 that Typhoons 28 (Nolo) and 29 (Koguma) had formed, bringing the number of active typhoons near Japan to three. [ 5 , 12 , 29 , 30 ]
- Typhoon 27 was large and very strong and was moving north-northwest near the Ogasawara Islands at about 20 km/h as of 9 a.m. on Oct. 5. [ 3 , 8 , 12 ]
- Typhoon 28 formed from a hurricane that crossed the date line near the Midway Islands. [ 5 , 12 , 29 , 30 ]
- Typhoon 29 formed at 9 a.m. on Oct. 5 near the Marshall Islands. [ 9 , 12 , 29 , 30 ]
- The Japan Meteorological Agency called for caution against high waves and strong winds as Typhoon 27 moved north. [ 1 , 12 , 15 ]
- Three typhoons active at once in October was the first such case in five years, and Typhoon 28 was the first crossing typhoon in three years. [ 16 , 22 , 30 ]
Still unclear
- Typhoon 27's forward speed was reported as about 20 km/h by several outlets, but one later TBS report gave 15 km/h. The difference may reflect updated Japan Meteorological Agency bulletins, but the documents do not explain the change.
- Whether Typhoon 28 will approach Honshu. Nippon TV reported that this was still unclear, and TBS said forecast circles remained large.
- The exact timing and severity of impacts over the Oct. 10-12 three-day weekend. Documents say the effects depend on each typhoon's path and development.
- Forecast models suggesting Typhoon 28 could U-turn and Typhoon 29 could follow a path similar to Typhoon 27. This comes from a single community outlet's account of forecast models and is not confirmed by other documents.
What local media are saying
Timeline, local time
- Typhoon 27 was near the Ogasawara Islands moving north-northwest at about 20 km/h; Typhoon 29 formed near the Marshall Islands, and Typhoon 28 became a typhoon after crossing the date line. [ 3 , 8 , 12 , 29 , 30 ]
- The Japan Meteorological Agency announced that tropical depression B had become Typhoon 29. [ 9 ]
- The Japan Meteorological Agency announced that the hurricane moving west near the Midway Islands had become Typhoon 28 (Nolo). [ 5 ]
- The Japan Meteorological Agency issued general typhoon information for Typhoon 29. [ 9 ]
- Jiji Press reported Japan Meteorological Agency warnings for high waves through Oct. 6 and detailed Typhoon 27's storm and strong wind areas. [ 12 ]
- Typhoon 28 was near the Midway Islands moving west at about 30 km/h with a central pressure of 950 hPa. [ 20 ]
- The Japan Meteorological Agency reported Typhoon 27 moving north at 20 km/h with a central pressure of 925 hPa and a maximum wind speed of 50 meters per second, and said it would leave the Ogasawara area by the morning of Oct. 6. [ 27 , 29 ]
- On Oct. 6, the three typhoons were still active, the first October triple typhoon in five years. [ 30 ]
- The Japan Meteorological Agency warned of swells and heavy seas for Ogasawara until the evening of Oct. 6, the Izu Islands from after noon to late night on Oct. 6, and the sea off Kanto from the evening of Oct. 6 to dawn on Oct. 7. [ 25 , 30 , 31 ]