2025 tropical cyclone season · Southern Hemisphere

Cyclone Sean Sean · SH102025

Cyclone Sean was tracked in the Southern Hemisphere from 2025-01-17 to 2025-01-23 (6 days), peaking at 115 kt (H4) with a minimum pressure of 936 hPa. 151 archived forecasts from ECMWF, ECMWF ENS, GFS, GEFS are verified against its best track; at 48 hours the closest was ECMWF ENS, 62 km off on average.

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ATCF ID
SH102025
Basin
Southern Hemisphere
Tracked
2025-01-17 → 2025-01-23 (6 days)
Peak wind
115 kt · 59 m/s · H4
Minimum pressure
936 hPa
Archived forecasts
151
Sources
ECMWF · ECMWF ENS · GFS · GEFS
TDTSH1H2H3H4H5

Forecast track error (km)

Source24 h48 h72 h120 h
ECMWF45 (17)71 (13)95 (9)444 (1)
ECMWF ENS38 (17)62 (13)115 (9)444 (1)
GFS44 (17)75 (13)131 (9)233 (1)
GEFS38 (17)81 (13)152 (9)356 (1)

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
2025-01-18 00Z19.3°S 119.1°E35996TS
2025-01-18 06Z19.3°S 118.1°E35996TS
2025-01-18 12Z18.9°S 117.8°E45996TS
2025-01-18 18Z19.2°S 117.3°E45992TS
2025-01-19 00Z19.5°S 116.1°E51987TS
2025-01-19 06Z19.6°S 115.3°E54985TS
2025-01-19 12Z20.2°S 114.4°E64978H1
2025-01-19 18Z20.5°S 113.3°E74975H1
2025-01-20 00Z21.0°S 112.3°E93961H2
2025-01-20 06Z21.6°S 111.7°E109940H3
2025-01-20 12Z22.6°S 110.8°E115936H4
2025-01-20 18Z23.3°S 110.0°E105948H3
2025-01-21 00Z24.1°S 109.2°E93956H2
2025-01-21 06Z25.1°S 108.4°E80966H1
2025-01-21 12Z26.3°S 107.5°E64977H1
2025-01-21 18Z26.8°S 107.5°E54982TS
2025-01-22 00Z27.3°S 107.0°E45988TS
2025-01-22 06Z27.9°S 107.0°E45987TS
2025-01-22 12Z28.2°S 107.2°E39992TS
2025-01-22 18Z28.4°S 107.5°E39991TS
2025-01-23 00Z29.2°S 107.8°E39994TS