2025 tropical cyclone season · western North Pacific

Typhoon Sepat Sepat · WP022025

Typhoon Sepat was tracked in the western North Pacific from 2025-06-21 to 2025-06-26 (5 days), peaking at 39 kt (TS) with a minimum pressure of 1000 hPa. 76 archived forecasts from ECMWF, ECMWF ENS, GFS, GEFS are verified against its best track; at 48 hours the closest was ECMWF ENS, 39 km off on average.

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ATCF ID
WP022025
Basin
western North Pacific
Tracked
2025-06-21 → 2025-06-26 (5 days)
Peak wind
39 kt · 20 m/s · TS
Minimum pressure
1000 hPa
Archived forecasts
76
Sources
ECMWF · ECMWF ENS · GFS · GEFS
TDTSH1H2H3H4H5

Forecast track error (km)

Source24 h48 h72 h120 h
ECMWF34 (12)59 (8)130 (3)—
ECMWF ENS33 (12)39 (8)95 (3)—
GFS46 (12)108 (8)135 (4)—
GEFS36 (12)103 (8)86 (4)—

Mean great-circle distance to the best track at each lead time, counted while the system was a tropical or subtropical cyclone; the number of cases is in brackets.

Best track

Six-hourly positions of the US best track (JTWC / NHC, one-minute winds); grades on the Saffir–Simpson scale.

Time (UTC)PositionWind (kt)Pressure (hPa)Grade
2025-06-22 12Z23.2°N 145.9°E291006TD
2025-06-22 18Z23.8°N 145.3°E291006TD
2025-06-23 00Z24.6°N 144.7°E351006TS
2025-06-23 06Z25.9°N 143.9°E351002TS
2025-06-23 12Z27.0°N 143.0°E391002TS
2025-06-23 18Z28.4°N 141.9°E351003TS
2025-06-24 00Z29.3°N 141.0°E351003TS
2025-06-24 06Z30.0°N 140.4°E351000TS
2025-06-24 12Z30.6°N 140.1°E351000TS
2025-06-24 18Z31.3°N 139.8°E291003TD
2025-06-25 00Z32.0°N 139.5°E291005TD
2025-06-25 06Z32.7°N 139.6°E251008TD
2025-06-25 12Z33.7°N 139.8°E251003TD
2025-06-25 18Z34.5°N 140.3°E251008TD
2025-06-26 00Z35.7°N 141.4°E251008TD
2025-06-26 06Z37.1°N 142.9°E251006TD