Tropical Storm No. 25 (Dujuan) is advancing rapidly northward across the open waters of the Northwest Pacific as a large severe tropical storm, with forecasters warning of worsening maritime conditions across the Ogasawara archipelago and coastal waters off eastern Japan over the coming days.
CURRENT STATUS
Based on the latest JMA observations on September 17, 2026 03:45 UTC
- Location: 20.0°N, 150.6°E — approximately 900 km east-southeast of Chichijima, Ogasawara Islands
- Classification: Severe Tropical Storm (STS)
- Movement: North at 21 kt (40 km/h)
- Central pressure: 985 hPa
- Maximum sustained winds: 50 kt (93 km/h)
- Maximum gusts: 70 kt (130 km/h)
- ≥30-kt wind area: 950 km (500 NM) to the north, 440 km (240 NM) to the south
Weathernews Global Composite Satellite Imagery valid September 16, 2026 13:30 UTC to September 17, 2026 04:30 UTC
FORECAST TRACK SUMMARY
Tropical Storm No. 25 (Dujuan) is forecast to track west-northwest toward the Ogasawara archipelago through 19 September before recurving northward across key shipping corridors south of Honshu. The storm is forecast to track parallel to and offshore of the Kanto coastline on 21 September, accelerating rapidly northeastward and transitioning to an extratropical gale low over the open Northwest Pacific by 22 September.
INTENSITY FORECAST
Tropical Storm No. 25 (Dujuan) is expected to intensify slightly over the next 12 hours, with peak sustained winds reaching 55 kt (102 km/h) and gusts up to 80 kt (148 km/h) by 15:00 UTC on 17 September (00:00 JST, 18 September), accompanied by a storm warning area radius of 85 NM (155 km).
The storm is forecast to maintain severe tropical storm status through the weekend, with central pressure deepening to 980 hPa by 00:00 UTC on 20 September (09:00 JST) while maintaining maximum sustained winds of 50 kt (93 km/h).
As the system tracks into higher latitudes off northeastern Japan, it is forecast to complete its transition to an extratropical low by 00:00 UTC on 22 September in the open waters of the Northwest Pacific Ocean, maintaining sustained winds of 50 kt (93 km/h).
IMPACTS & THREATS
Tracking rapidly across the open Northwest Pacific before pivoting toward the Ogasawara archipelago and recurring offshore of eastern Japan, Tropical Storm No. 25 (Dujuan) presents significant maritime hazards characterized by an extraordinarily broad gale wind field and storm-force core winds through 22 September.
Strong Winds: Strong to storm-force sustained winds are expected along the storm's path across the Northwest Pacific and coastal waters of eastern Japan. Tropical Storm No. 25 (Dujuan) currently packs maximum sustained winds of 50 kt (93 km/h) near its center. A large gale-force wind field (≥30 kt) extends up to 500 NM (950 km) across the northern semicircle and 240 NM (440 km) to the south. Sustained winds are forecast to peak at 55 kt (102 km/h) by 15:00 UTC on 17 September (00:00 JST, 18 September), with a storm warning area (winds ≥50 kt) expanding to a radius of 85 NM (155 km) near the core. Sustained winds of 50 kt (93 km/h) are forecast to persist through the storm's extratropical transition on 22 September.
Violent Gusts: Destructive wind gusts remain a severe threat near the storm center and within developing squall bands. Peak gusts near the core are currently reaching 70 kt (130 km/h). Maximum wind gusts are forecast to intensify up to 80 kt (148 km/h) by 15:00 UTC on 17 September, before maintaining maximum gusts of 70 kt (130 km/h) as the system passes the Ogasawara Islands, skirts the Kanto offshore waters, and moves into the subarctic Pacific.
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Note on the storm's name: "Dujuan" is drawn from the Western North Pacific and South China Sea tropical cyclone name list, contributed by China, and refers to the azalea flower. The WMO and the ESCAP/WMO Typhoon Committee adopt these names sequentially to make tracking specific storms straightforward and to quickly communicate warnings. To learn more about how storms are named, please visit the World Meteorological Organization (WMO) website.
