Typhoon No. 27 moves north near Ogasawara as typhoons 28 and 29 form
Version 3: The picture is unchanged: Typhoon No. 27 held at very strong intensity near the Ogasawara Islands with no major mainland impact forecast, and Typhoons No. 28 and No. 29 remained active without forecasts of effects on Japan.
In short
Typhoon No. 27, described by the Japan Meteorological Agency as large and very strong, moved north over waters near the Ogasawara Islands and was forecast to approach the islands at very strong intensity from the evening of Oct. 5 to early Oct. 6, with the agency warning of high waves accompanied by swells through Oct. 6. The agency reported a central pressure of 925 hectopascals and a maximum gust of 70 meters per second on Oct. 5, and expected the storm to pass away from land and become extratropical east of Japan around Oct. 7 to 8, with no major effect on the archipelago's weather reported. Two more typhoons formed on Oct. 5 — No. 28 (Noro), which crossed the international date line from a hurricane, and No. 29 (Koguma) — leaving three active at once, which Sankei Shimbun reported was the first such October situation in five years.
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Typhoon No. 27 (Cho-i-wan) moved north over waters near the Ogasawara Islands on Oct. 4 and Oct. 5, and the Japan Meteorological Agency described it as large and very strong. As of 3 p.m. on Oct. 5, the agency placed its center at 26.2 degrees north and 146.4 degrees east, moving north at 20 kilometers per hour. The agency forecast that the storm could approach the Ogasawara Islands at very strong intensity from the evening of Oct. 5 to early Oct. 6, and warned of high waves accompanied by swells around the islands through Oct. 6. [ 1 , 5 , 12 , 19 , 31 , 39 ]
The agency's intensity figures changed as the storm developed. Nikkei reported on the morning of Oct. 4, citing the agency, a central pressure of 945 hectopascals and a maximum gust of 60 meters per second, while TBS, citing the agency's 9:50 a.m. announcement based on a 9 a.m. observation, reported 935 hectopascals, a maximum wind speed of 45 meters per second and a maximum gust of 65 meters per second. The agency forecast the typhoon could reach 925 hectopascals and a maximum gust of 70 meters per second on Oct. 5; by 3 a.m. on Oct. 5 it reported a central pressure of 925 hectopascals, and at 3 p.m. it reported a maximum gust of 70 meters per second. [ 1 , 3 , 4 , 7 , 16 , 30 , 31 , 39 ]
For the Ogasawara Islands, Sankei Shimbun reported, citing the agency, forecast maximum winds of 23 meters per second and maximum gusts of 35 meters per second on Oct. 5 and 6, with waves of 8 meters accompanied by swells. TBS reported the same 8-meter wave forecast and said the seas would be very rough, urging people to stay away from the coast. Nippon TV reported that because the typhoon passes away from land, direct effects appeared unlikely, though it warned of high waves on the Pacific side, and TBS and Nippon TV reported no major effect on the archipelago's weather. The agency forecast it would become extratropical around Oct. 7 east of Japan, or on Oct. 8 east of the Chishima islands, the two timings being reported in different TBS updates. [ 2 , 10 , 11 , 12 , 17 , 19 , 21 , 22 , 32 ]
Two more typhoons formed on the morning of Oct. 5, making three active at once. Typhoon No. 28 (Noro) formed after Hurricane Noro crossed the international date line, Livedoor News reported, which it said was the first such crossing in three years, since Typhoon No. 8 (Dora) in August 2023. NHK reported it formed near the Midway Islands, far southeast of Japan, and the agency said it was moving west at 30 kilometers per hour with a central pressure of 960 hectopascals and a maximum gust of 65 meters per second. Typhoon No. 29 (Koguma) also formed near the Marshall Islands, Livedoor News and Yahoo! News Japan reported. Sankei Shimbun reported that three simultaneous typhoons in October were the first in five years and noted a possible Fujiwhara effect. [ 24 , 25 , 26 , 27 , 29 , 37 ]
The agency said at 3 p.m. on Oct. 5 that Typhoon No. 28 was near the Midway Islands moving west-northwest at 25 kilometers per hour with a central pressure of 950 hectopascals and a maximum gust of 70 meters per second. Livedoor News said the effect of the new typhoons on Japan would require attention to future information, and Yahoo! News Japan reported that Typhoon No. 29 was forecast to move to waters near Minamitorishima at strong intensity on Oct. 9. [ 25 , 29 , 40 ]
Why it matters
The Ogasawara Islands lie near the typhoon's forecast track and face high waves, swells and strong winds, though Nippon TV and TBS reported that the storm passes away from land and that major effects on the mainland's weather are not expected. The formation of Typhoons No. 28 and No. 29 means forecasts for Japan could still change, and Sankei Shimbun noted the first three-typhoon October in five years as well as a possible Fujiwhara effect in which the storms' courses can influence one another.
Key facts
- Typhoon No. 27 (Cho-i-wan), described by the Japan Meteorological Agency as large and very strong, moved north over waters near the Ogasawara Islands on Oct. 4 and Oct. 5. [ 1 , 5 , 19 , 20 , 31 ]
- As of 3 p.m. on Oct. 5 the agency placed the typhoon's center at 26.2 degrees north and 146.4 degrees east, moving north at 20 kilometers per hour with a central pressure of 925 hectopascals and a maximum gust of 70 meters per second. [ 39 ]
- The Ogasawara Islands were forecast to see maximum winds of 23 meters per second, maximum gusts of 35 meters per second and waves of 8 meters accompanied by swells on Oct. 5 and 6. [ 11 , 12 , 21 ]
- The typhoon was expected to move north over seas east of Japan and become extratropical around Oct. 7 to 8, with no major effect on the archipelago's weather reported. [ 10 , 12 , 19 , 22 , 32 ]
- Typhoon No. 28 (Noro) formed on the morning of Oct. 5 near the Midway Islands after a hurricane crossed the international date line, at a central pressure of 960 hectopascals and moving west at 30 kilometers per hour. [ 24 , 25 , 26 , 27 ]
- Typhoon No. 29 (Koguma) also formed on Oct. 5, leaving three active typhoons; Sankei Shimbun reported this was the first October triple typhoon in five years. [ 25 , 29 , 37 ]
- Sankei Shimbun noted a possible Fujiwhara effect, in which typhoons' courses can influence one another. [ 37 ]
Confirmed by several sources
- Typhoon No. 27 is described by the Japan Meteorological Agency as large and very strong. [ 1 , 2 , 5 , 12 , 31 ]
- Typhoon No. 27 was over waters near the Ogasawara Islands and moving north on Oct. 4 and Oct. 5. [ 1 , 5 , 12 , 19 , 20 ]
- The agency warned of high waves accompanied by swells around the Ogasawara Islands through Oct. 6. [ 2 , 5 , 12 , 13 , 21 , 29 ]
- The agency forecast that Typhoon No. 27 could approach the Ogasawara Islands at very strong intensity from the evening of Oct. 5 to early Oct. 6. [ 1 , 2 , 5 , 15 ]
- Typhoon No. 28 formed on the morning of Oct. 5 near the Midway Islands after a hurricane crossed the international date line. [ 24 , 25 , 26 , 27 ]
- Typhoon No. 29 also formed on Oct. 5, leaving three typhoons active at the same time. [ 25 , 29 , 32 , 34 , 37 ]
- Typhoon No. 27 was forecast to move north over seas east of Japan and to become extratropical around Oct. 7 to 8. [ 10 , 12 , 19 , 22 ]
Still unclear
- How Typhoons No. 28 and No. 29 will affect Japan. The documents give no forecast of effects on Japan; Livedoor News said the impact would require attention to future information.
- Whether the three typhoons will influence one another's courses through a Fujiwhara effect. This appears only in Sankei Shimbun's headline, with no detail in its text and no mention in any other document.
- The typhoon's central pressure and maximum gust reported on the morning of Oct. 4. Nikkei, citing the agency, reported 945 hectopascals and a maximum gust of 60 meters per second, while TBS, citing the agency's 9:50 a.m. announcement based on a 9 a.m. observation, reported 935 hectopascals and 65 meters per second; the documents do not explain the difference.
- Whether Typhoon No. 27 will become extratropical on Oct. 7 or Oct. 8. Sankei Shimbun and some TBS reports say Oct. 7 east of Japan, while other TBS reports say Oct. 8 east of the Chishima islands; the documents do not reconcile the two.
- That Typhoon No. 28 is the first cross-border typhoon in three years. The claim appears only in Livedoor News, a single community outlet, which said the previous such case was Typhoon No. 8 (Dora) in August 2023.
- The agency forecast that Typhoon No. 27 could develop to a central pressure of 925 hectopascals and a maximum gust of 70 meters per second on Oct. 5, and reported 925 hectopascals at 3 a.m. and a maximum gust of 70 meters per second at 3 p.m. that day. Reported by a single source so far
What local media are saying
Timeline, local time
- Nikkei reports the typhoon near the Ogasawara coast moving northeast at 20 kilometers per hour, with a central pressure of 945 hectopascals and a maximum gust of 60 meters per second, citing the Japan Meteorological Agency. [ 1 ]
- An agency observation puts the typhoon near the Ogasawara coast, moving north-northeast at about 25 kilometers per hour, with a central pressure of 935 hectopascals and a maximum gust of 65 meters per second. [ 3 , 4 ]
- The agency releases its observation and forecast, projecting a track north off the Kanto coastal area around Oct. 6. [ 3 , 6 ]
- NHK reports the typhoon may approach the Ogasawara Islands at very strong intensity from the evening of Oct. 5 to early Oct. 6, with high waves requiring caution. [ 5 ]
- The agency reports the typhoon near the Ogasawara coast moving north at 20 kilometers per hour, central pressure 935 hectopascals and maximum gust 65 meters per second, with a storm zone within 165 kilometers of the center. [ 8 , 11 , 12 ]
- The agency forecasts the typhoon could develop to a central pressure of 925 hectopascals and a maximum gust of 70 meters per second on Oct. 5. [ 7 , 9 ]
- A general weather advisory from the agency calls for caution on high waves around the Ogasawara Islands through Oct. 6 and on strong winds on Oct. 5 and 6. [ 13 ]
- Sankei Shimbun reports an Ogasawara forecast of maximum winds of 23 meters per second, gusts of 35 meters per second and 8-meter waves for Oct. 5 and 6, and an extratropical transition on Oct. 7. [ 12 ]
- The agency reports the typhoon near the Ogasawara coast moving north at 20 kilometers per hour with a central pressure of 925 hectopascals. [ 19 , 30 ]
- Hurricane Noro crosses the international date line and becomes Typhoon No. 28, and Typhoon No. 29 also forms; Typhoon No. 27 is reported at 925 hectopascals with a maximum wind of 50 meters per second and a maximum gust of 70 meters per second. [ 24 , 25 , 26 , 31 ]
- Sankei Shimbun reports the first October triple typhoon in five years and notes a possible Fujiwhara effect on the storms' tracks. [ 37 ]
- The agency reports Typhoon No. 27 at 26.2 degrees north and 146.4 degrees east, moving north at 20 kilometers per hour with a central pressure of 925 hectopascals and a maximum gust of 70 meters per second, and Typhoon No. 28 near the Midway Islands moving west-northwest at 25 kilometers per hour with a central pressure of 950 hectopascals and a maximum gust of 70 meters per second. [ 39 , 40 ]