2026 tropical cyclone season · eastern North Pacific
Hurricane Iselle Iselle · EP092026
Hurricane Iselle was tracked in the eastern North Pacific from 2026-08-21 to 2026-08-27 (6 days), peaking at 60 kt (TS) with a minimum pressure of 988 hPa. 123 archived forecasts from NHC, ECMWF, ECMWF ENS, GFS, GEFS, Google DeepMind are verified against its best track; at 48 hours the closest was Google DeepMind, 37 km off on average.
- ATCF ID
- EP092026
- Basin
- eastern North Pacific
- Tracked
- 2026-08-21 → 2026-08-27 (6 days)
- Peak wind
- 60 kt · 31 m/s · TS
- Minimum pressure
- 988 hPa
- Archived forecasts
- 123
- Sources
- NHC · ECMWF · ECMWF ENS · GFS · GEFS · Google DeepMind
Forecast track error (km)
| Source | 24 h | 48 h | 72 h | 120 h |
|---|---|---|---|---|
| NHC | 55 (11) | 56 (7) | 45 (3) | — |
| ECMWF | 56 (11) | 107 (7) | 263 (3) | — |
| ECMWF ENS | 61 (11) | 97 (7) | 149 (3) | — |
| GFS | 72 (11) | 121 (7) | 205 (3) | — |
| GEFS | 57 (11) | 81 (7) | 109 (3) | — |
| Google DeepMind | 35 (11) | 37 (7) | 50 (3) | — |
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 |
|---|---|---|---|---|
| 2026-08-21 12Z | 10.0°N 105.0°W | 20 | — | TD |
| 2026-08-21 18Z | 10.8°N 106.4°W | 20 | — | TD |
| 2026-08-22 00Z | 11.4°N 107.5°W | 20 | — | TD |
| 2026-08-22 06Z | 12.0°N 108.6°W | 20 | 1009 | TD |
| 2026-08-22 12Z | 12.5°N 109.9°W | 25 | 1009 | TD |
| 2026-08-22 18Z | 13.2°N 111.7°W | 30 | 1008 | TD |
| 2026-08-23 00Z | 14.1°N 111.9°W | 35 | 1005 | TS |
| 2026-08-23 06Z | 14.6°N 112.6°W | 40 | 1005 | TS |
| 2026-08-23 12Z | 15.5°N 113.7°W | 40 | 1003 | TS |
| 2026-08-23 18Z | 16.6°N 114.6°W | 45 | 1001 | TS |
| 2026-08-24 00Z | 16.8°N 114.9°W | 45 | 999 | TS |
| 2026-08-24 06Z | 17.6°N 115.8°W | 50 | 996 | TS |
| 2026-08-24 12Z | 18.2°N 116.7°W | 55 | 992 | TS |
| 2026-08-24 18Z | 18.9°N 117.6°W | 60 | 988 | TS |
| 2026-08-25 00Z | 19.5°N 118.3°W | 60 | 988 | TS |
| 2026-08-25 06Z | 20.2°N 119.5°W | 60 | 988 | TS |
| 2026-08-25 12Z | 20.7°N 120.6°W | 55 | 992 | TS |
| 2026-08-25 18Z | 20.9°N 121.4°W | 50 | 994 | TS |
| 2026-08-26 00Z | 21.1°N 122.1°W | 45 | 996 | TS |
| 2026-08-26 06Z | 21.5°N 122.9°W | 45 | 996 | TS |
| 2026-08-26 12Z | 21.9°N 123.6°W | 40 | 999 | TS |
| 2026-08-26 18Z | 22.5°N 124.5°W | 40 | 1002 | TS |
| 2026-08-27 00Z | 22.8°N 125.5°W | 30 | 1002 | TD |