2023 tropical cyclone season · western North Pacific

Typhoon Unnamed WP17 WP17 · WP172023

Typhoon Unnamed WP17 was tracked in the western North Pacific from 2023-11-09 to 2023-11-17 (8 days), peaking at 25 kt (TD) with a minimum pressure of 996 hPa. 56 archived forecasts from ECMWF, ECMWF ENS, GFS, GEFS are verified against its best track.

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ATCF ID
WP172023
Basin
western North Pacific
Tracked
2023-11-09 → 2023-11-17 (8 days)
Peak wind
25 kt · 13 m/s · TD
Minimum pressure
996 hPa
Archived forecasts
56
Sources
ECMWF · ECMWF ENS · GFS · GEFS
TDTSH1H2H3H4H5

Forecast track error (km)

Source24 h48 h72 h120 h
ECMWF105 (5)220 (1)——
ECMWF ENS111 (5)155 (1)——
GFS208 (5)286 (1)——
GEFS159 (5)123 (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
2023-11-09 18Z5.1°N 149.0°E151010TD
2023-11-10 00Z5.3°N 148.4°E151009TD
2023-11-10 06Z5.5°N 147.9°E151008TD
2023-11-10 12Z5.7°N 147.5°E151007TD
2023-11-10 18Z6.1°N 147.1°E151007TD
2023-11-11 00Z6.4°N 146.8°E151005TD
2023-11-11 06Z6.3°N 145.9°E151004TD
2023-11-11 12Z6.3°N 144.9°E25999TD
2023-11-11 18Z6.5°N 143.2°E201002TD
2023-11-12 00Z6.7°N 141.5°E251000TD
2023-11-12 06Z7.1°N 140.8°E25999TD
2023-11-12 12Z7.6°N 140.0°E25998TD
2023-11-12 18Z7.6°N 139.4°E25997TD
2023-11-13 00Z8.0°N 139.0°E25998TD
2023-11-13 06Z7.5°N 139.5°E25999TD
2023-11-13 12Z6.9°N 139.9°E25998TD
2023-11-13 18Z5.4°N 140.1°E25997TD
2023-11-14 00Z5.3°N 140.0°E25997TD
2023-11-14 06Z5.1°N 139.8°E25997TD
2023-11-14 12Z5.5°N 139.7°E25996TD
2023-11-14 18Z5.8°N 138.6°E201000TD
2023-11-15 00Z6.0°N 137.5°E201002TD