2023 tropical cyclone season · western North Pacific
Typhoon Lan Lan · WP072023
Typhoon Lan was tracked in the western North Pacific from 2023-08-06 to 2023-08-18 (13 days), peaking at 120 kt (H4) with a minimum pressure of 932 hPa. 172 archived forecasts from ECMWF, ECMWF ENS, GFS, GEFS are verified against its best track; at 48 hours the closest was ECMWF ENS, 52 km off on average.
- ATCF ID
- WP072023
- Basin
- western North Pacific
- Tracked
- 2023-08-06 → 2023-08-18 (13 days)
- Peak wind
- 120 kt · 62 m/s · H4
- Minimum pressure
- 932 hPa
- Archived forecasts
- 172
- Sources
- ECMWF · ECMWF ENS · GFS · GEFS
Forecast track error (km)
| Source | 24 h | 48 h | 72 h | 120 h |
|---|---|---|---|---|
| ECMWF | 39 (37) | 64 (33) | 91 (29) | 142 (10) |
| ECMWF ENS | 32 (37) | 52 (33) | 72 (29) | 213 (21) |
| GFS | 45 (35) | 77 (31) | 113 (27) | 241 (19) |
| GEFS | 40 (35) | 60 (31) | 107 (27) | 285 (19) |
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 |
|---|---|---|---|---|
| 2023-08-06 00Z | 24.5°N 145.1°E | 10 | 1014 | TD |
| 2023-08-06 06Z | 24.2°N 145.5°E | 15 | 1002 | TD |
| 2023-08-06 12Z | 23.8°N 146.6°E | 15 | 1002 | TD |
| 2023-08-06 18Z | 23.7°N 147.5°E | 20 | 1001 | TD |
| 2023-08-07 00Z | 23.5°N 148.4°E | 20 | 990 | TD |
| 2023-08-07 06Z | 23.8°N 149.0°E | 25 | 988 | TD |
| 2023-08-07 12Z | 23.7°N 149.2°E | 25 | 989 | TD |
| 2023-08-07 18Z | 23.9°N 149.4°E | 30 | 985 | TD |
| 2023-08-08 00Z | 24.5°N 149.0°E | 30 | 984 | TD |
| 2023-08-08 06Z | 24.0°N 148.6°E | 35 | 985 | TS |
| 2023-08-08 12Z | 24.1°N 148.2°E | 45 | 985 | TS |
| 2023-08-08 18Z | 24.1°N 147.7°E | 40 | 988 | TS |
| 2023-08-09 00Z | 24.2°N 146.9°E | 50 | 985 | TS |
| 2023-08-09 06Z | 24.5°N 146.1°E | 60 | 981 | TS |
| 2023-08-09 12Z | 24.8°N 145.2°E | 60 | 981 | TS |
| 2023-08-09 18Z | 25.0°N 144.6°E | 65 | 977 | H1 |
| 2023-08-10 00Z | 25.2°N 143.9°E | 75 | 968 | H1 |
| 2023-08-10 06Z | 25.5°N 143.4°E | 85 | 961 | H2 |
| 2023-08-10 12Z | 25.9°N 143.1°E | 100 | 956 | H3 |
| 2023-08-10 18Z | 26.4°N 142.9°E | 110 | 941 | H3 |
| 2023-08-11 00Z | 26.8°N 142.8°E | 120 | 932 | H4 |
| 2023-08-11 06Z | 27.4°N 142.9°E | 115 | 936 | H4 |
| 2023-08-11 12Z | 27.9°N 142.6°E | 105 | 943 | H3 |
| 2023-08-11 18Z | 28.2°N 142.3°E | 90 | 956 | H2 |
| 2023-08-12 00Z | 28.5°N 141.8°E | 80 | 964 | H1 |
| 2023-08-12 06Z | 28.8°N 141.4°E | 75 | 966 | H1 |
| 2023-08-12 12Z | 29.0°N 140.7°E | 75 | 970 | H1 |
| 2023-08-12 18Z | 29.4°N 140.0°E | 70 | 970 | H1 |
| 2023-08-13 00Z | 29.7°N 139.5°E | 75 | 966 | H1 |
| 2023-08-13 06Z | 30.2°N 138.9°E | 80 | 962 | H1 |
| 2023-08-13 12Z | 30.8°N 138.5°E | 85 | 959 | H2 |
| 2023-08-13 18Z | 31.4°N 137.9°E | 85 | 958 | H2 |
| 2023-08-14 00Z | 31.9°N 137.4°E | 90 | 955 | H2 |
| 2023-08-14 06Z | 32.3°N 137.0°E | 85 | 959 | H2 |
| 2023-08-14 12Z | 32.8°N 136.6°E | 80 | 962 | H1 |
| 2023-08-14 18Z | 33.4°N 136.1°E | 75 | 964 | H1 |
| 2023-08-15 00Z | 34.2°N 135.4°E | 55 | 977 | TS |
| 2023-08-15 06Z | 35.2°N 135.0°E | 45 | 978 | TS |
| 2023-08-15 12Z | 36.2°N 134.7°E | 45 | 981 | TS |
| 2023-08-15 18Z | 37.0°N 134.7°E | 45 | 982 | TS |
| 2023-08-16 00Z | 38.3°N 135.4°E | 45 | 982 | TS |
| 2023-08-16 06Z | 39.8°N 136.0°E | 35 | 989 | TS |
| 2023-08-16 12Z | 40.8°N 136.2°E | 35 | 989 | TS |
| 2023-08-16 18Z | 42.4°N 137.4°E | 40 | 985 | TS |
| 2023-08-17 00Z | 44.0°N 138.7°E | 40 | 985 | TS |
| 2023-08-17 06Z | 44.7°N 139.8°E | 35 | 987 | TS |
| 2023-08-17 12Z | 46.3°N 141.4°E | 30 | 976 | TD |