2023 tropical cyclone season · western North Pacific
Typhoon Yun-Yeung Yun-Yeung · WP122023
Typhoon Yun-Yeung was tracked in the western North Pacific from 2023-09-04 to 2023-09-09 (5 days), peaking at 45 kt (TS) with a minimum pressure of 988 hPa. 78 archived forecasts from ECMWF, ECMWF ENS, GFS, GEFS are verified against its best track; at 48 hours the closest was GEFS, 249 km off on average.
- ATCF ID
- WP122023
- Basin
- western North Pacific
- Tracked
- 2023-09-04 → 2023-09-09 (5 days)
- Peak wind
- 45 kt · 23 m/s · TS
- Minimum pressure
- 988 hPa
- Archived forecasts
- 78
- Sources
- ECMWF · ECMWF ENS · GFS · GEFS
Forecast track error (km)
| Source | 24 h | 48 h | 72 h | 120 h |
|---|---|---|---|---|
| ECMWF | 122 (7) | 257 (5) | 362 (1) | — |
| ECMWF ENS | 115 (9) | 269 (5) | 423 (1) | — |
| GFS | 92 (8) | 278 (4) | — | — |
| GEFS | 117 (8) | 249 (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) | Position | Wind (kt) | Pressure (hPa) | Grade |
|---|---|---|---|---|
| 2023-09-04 00Z | 20.3°N 130.0°E | 15 | 1010 | TD |
| 2023-09-04 06Z | 20.8°N 130.3°E | 20 | 1007 | TD |
| 2023-09-04 12Z | 21.2°N 130.6°E | 20 | 1006 | TD |
| 2023-09-04 18Z | 21.3°N 131.0°E | 20 | 1006 | TD |
| 2023-09-05 00Z | 21.3°N 131.5°E | 20 | 1007 | TD |
| 2023-09-05 06Z | 21.6°N 131.6°E | 20 | 1006 | TD |
| 2023-09-05 12Z | 21.9°N 131.7°E | 25 | 1006 | TD |
| 2023-09-05 18Z | 23.6°N 132.6°E | 30 | 1003 | TD |
| 2023-09-06 00Z | 25.8°N 133.2°E | 35 | 999 | TS |
| 2023-09-06 06Z | 26.5°N 134.1°E | 35 | 999 | TS |
| 2023-09-06 12Z | 27.6°N 134.7°E | 40 | 995 | TS |
| 2023-09-06 18Z | 28.7°N 135.9°E | 40 | 994 | TS |
| 2023-09-07 00Z | 29.8°N 136.5°E | 40 | 994 | TS |
| 2023-09-07 06Z | 30.8°N 137.0°E | 40 | 993 | TS |
| 2023-09-07 12Z | 31.8°N 137.1°E | 45 | 991 | TS |
| 2023-09-07 18Z | 32.6°N 137.2°E | 40 | 994 | TS |
| 2023-09-08 00Z | 32.7°N 137.1°E | 35 | 994 | TS |
| 2023-09-08 06Z | 32.7°N 137.6°E | 30 | 990 | TD |
| 2023-09-08 12Z | 33.5°N 138.0°E | 25 | 988 | TD |
| 2023-09-08 18Z | 34.2°N 138.3°E | 20 | 989 | TD |
| 2023-09-09 00Z | 34.7°N 138.6°E | 15 | 1006 | TD |
| 2023-09-09 06Z | 35.1°N 138.7°E | 15 | 991 | TD |