JMA advisories are only accessible since November 1, 2001, although this period for typhoon-equivalent systems can be presumed to be relatively or very inactive.
TY-equivalent period
Sustained windspeeds
Pressure
Land areas affected
Deaths
Refs
2002-01-27T12Z – 2002-01-28T00Z
120 km/h (75 mph)
972 hPa (28.70 inHg)
Northern Vietnam, South China, Taiwan, Japan, Russian Far East
None
Aggregates
1 system
120 km/h (75 mph)
972 hPa (28.70 inHg)
None
2002–03
The second half of this period is without any typhoon-equivalent system, resulting in the slightly below-average amount. However, the two December systems affected Japan significantly, with the one in late December reaching a very low central pressure.
The amount of typhoon-equivalent systems is slightly above average, yet the October system which absorbed Severe Tropical Storm Bebinca killed at least 20 people in Japan.
This period is relatively inactive and peaceful for typhoon-equivalent systems. Typhoon Lupit transitioned into a powerful extratropical cyclone east of Japan in late October.
The period is near average for the amount of typhoon-equivalent systems. Typhoon Malakas transitioned into an unusually powerful extratropical cyclone in terms of sustained winds. The mid-January reached the very low central pressure and killed 7 people in Hokkaido, Japan.
The amount of typhoon-equivalent systems is above average. The mid-January system is an unusually strong extratropical cyclone in terms of ten-minute maximum sustained winds. The April one caused significant damage and deaths over Japan. The last one is the only June typhoon-equivalent system since records from 2001, which transitioned from Typhoon Mawar.
TY-equivalent period
Sustained windspeeds
Pressure
Land areas affected
Deaths
Refs
2012-01-02T18Z – 2012-01-03T06Z
120 km/h (75 mph)
962 hPa (28.41 inHg)
Japan, Russian Far East
None
2012-01-12T06Z – 2012-01-12T18Z
140 km/h (85 mph)
948 hPa (27.99 inHg)
Japan, Russian Far East
None
2012-02-13T06Z
120 km/h (75 mph)
976 hPa (28.82 inHg)
None
None
2012-02-24T06Z – 2012-02-24T12Z
120 km/h (75 mph)
962 hPa (28.41 inHg)
Japan, Russian Far East
None
2012-03-05T00Z – 2012-03-05T06Z
120 km/h (75 mph)
972 hPa (28.70 inHg)
Japan, Russian Far East
None
2012-04-03T12Z – 2012-04-04T06Z
120 km/h (75 mph)
950 hPa (28.05 inHg)
East China, Korean Peninsula, Japan, Russian Far East
The amount of typhoon-equivalent systems is near average, yet the January system is the most intense Northwest Pacific extratropical cyclone in terms of ten-minute maximum sustained winds, since reliable records from 2001. It also killed 5 people in Japan.
The amount of typhoon-equivalent systems is above average. Except the system in October transitioned from Typhoon Wipha, other typhoon-equivalent systems did not cause deaths.
Although the amount of typhoon-equivalent systems is relatively low, the November system which absorbed the remnants of Typhoon Nuri became the most intense North Pacific extratropical cyclone in terms of atmosphere pressure since reliable records. The December system significantly affected Japan and caused 5 deaths over the country.
During this near-average period, the first typhoon-equivalent system which absorbed the remnants of Typhoon Dujuan and peaked in early October was the most intense extratropical cyclone over the Sea of Japan in recent years, killing one person in Hokkaido, Japan.
TY-equivalent period
Sustained windspeeds
Pressure
Land areas affected
Deaths
Refs
2015-10-01T21Z – 2015-10-02T09Z
120 km/h (75 mph)
946 hPa (27.94 inHg)
East China, Korean Peninsula, Russian Far East, Japan
It was a very active season, including a 924 hPa cyclone. The last system of this system is former Typhoon Surigae, with the lowest central pressure of former tropical cyclones among the whole lists of this page.
From July 2001 to June 2023, the Japan Meteorological Agency reported 114 extratropical cyclones with typhoon-equivalent (10-minute) maximum sustained winds in the Northwest Pacific Ocean. There was an average of 5.2 systems reaching that intensity each period.
About three fourths of typhoon-equivalent extratropical cyclones were at 65 knots. Approximately one 70-knot system formed each period. Systems at or over 75 knots were extremely rare.
Graphs are unavailable due to technical issues. There is more info on Phabricator and on MediaWiki.org.
Unlike tropical cyclones, the central pressure of typhoon-equivalent extratropical cyclones at the same or similar intensity could vary significantly, although more than a half of total systems were between 950 to 970 hPa. The highest one was 988 hPa recorded in December 2012, while the lowest one was 920 hPa recorded in November 2014.
Graphs are unavailable due to technical issues. There is more info on Phabricator and on MediaWiki.org.
More than a half of total systems formed between December and February. Lots of September and October systems were originally tropical. No typhoon-equivalent systems were recorded in May, July and August.
Graphs are unavailable due to technical issues. There is more info on Phabricator and on MediaWiki.org.
14 October
