2023 tropical cyclone season · Southern Hemisphere
Cyclone Irene Irene · SH092023
Cyclone Irene was tracked in the Southern Hemisphere from 2023-01-15 to 2023-01-20 (5 days), peaking at 55 kt (TS) with a minimum pressure of 990 hPa. 34 archived forecasts from ECMWF, ECMWF ENS, GFS, GEFS are verified against its best track.
- ATCF ID
- SH092023
- Basin
- Southern Hemisphere
- Tracked
- 2023-01-15 → 2023-01-20 (5 days)
- Peak wind
- 55 kt · 28 m/s · TS
- Minimum pressure
- 990 hPa
- Archived forecasts
- 34
- Sources
- ECMWF · ECMWF ENS · GFS · GEFS
Forecast track error (km)
| Source | 24 h | 48 h | 72 h | 120 h |
|---|---|---|---|---|
| ECMWF | 191 (5) | 267 (1) | — | — |
| ECMWF ENS | 207 (5) | 429 (1) | — | — |
| GFS | 147 (5) | 349 (1) | — | — |
| GEFS | 158 (5) | 363 (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) | Position | Wind (kt) | Pressure (hPa) | Grade |
|---|---|---|---|---|
| 2023-01-16 18Z | 16.4°S 157.5°E | 25 | 1004 | TD |
| 2023-01-17 00Z | 17.2°S 157.2°E | 25 | 1003 | TD |
| 2023-01-17 06Z | 17.2°S 158.4°E | 30 | 1001 | TD |
| 2023-01-17 12Z | 17.4°S 159.4°E | 25 | 997 | TD |
| 2023-01-17 18Z | 17.7°S 160.8°E | 30 | 998 | TD |
| 2023-01-18 00Z | 17.7°S 162.1°E | 35 | 996 | TS |
| 2023-01-18 06Z | 18.0°S 163.7°E | 45 | 996 | TS |
| 2023-01-18 12Z | 18.4°S 165.6°E | 50 | 992 | TS |
| 2023-01-18 18Z | 19.0°S 167.4°E | 55 | 990 | TS |
| 2023-01-19 00Z | 19.6°S 169.3°E | 45 | 995 | TS |
| 2023-01-19 06Z | 21.3°S 172.0°E | 40 | 996 | TS |
| 2023-01-19 12Z | 23.1°S 174.3°E | 35 | 998 | TS |
| 2023-01-19 18Z | 25.1°S 176.5°E | 35 | 998 | TS |
| 2023-01-20 00Z | 28.0°S 179.1°E | 35 | 1002 | TS |
| 2023-01-20 06Z | 28.3°S 179.8°W | 30 | 1005 | TD |