2024 tropical cyclone season · Southern Hemisphere
Cyclone Unnamed SH12 SH12 · SH122024
Cyclone Unnamed SH12 was tracked in the Southern Hemisphere from 2024-01-31 to 2024-02-13 (13 days), peaking at 40 kt (TS) with a minimum pressure of 995 hPa. 92 archived forecasts from ECMWF, ECMWF ENS, GFS, GEFS are verified against its best track; at 48 hours the closest was GEFS, 117 km off on average.
- ATCF ID
- SH122024
- Basin
- Southern Hemisphere
- Tracked
- 2024-01-31 → 2024-02-13 (13 days)
- Peak wind
- 40 kt · 21 m/s · TS
- Minimum pressure
- 995 hPa
- Archived forecasts
- 92
- Sources
- ECMWF · ECMWF ENS · GFS · GEFS
Forecast track error (km)
| Source | 24 h | 48 h | 72 h | 120 h |
|---|---|---|---|---|
| ECMWF | 73 (14) | 168 (9) | 346 (7) | — |
| ECMWF ENS | 68 (15) | 163 (11) | 353 (7) | — |
| GFS | 95 (15) | 134 (11) | 226 (7) | — |
| GEFS | 82 (15) | 117 (11) | 208 (7) | — |
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 |
|---|---|---|---|---|
| 2024-01-31 00Z | 24.3°S 154.2°E | 20 | 1007 | TD |
| 2024-01-31 06Z | 24.1°S 154.9°E | 25 | 1004 | TD |
| 2024-01-31 12Z | 23.9°S 155.5°E | 30 | 999 | TD |
| 2024-01-31 18Z | 23.5°S 155.9°E | 30 | 999 | TD |
| 2024-02-01 00Z | 23.1°S 156.3°E | 30 | 999 | TD |
| 2024-02-01 06Z | 22.3°S 157.0°E | 25 | 1002 | TD |
| 2024-02-01 12Z | 21.3°S 157.9°E | 25 | 1003 | TD |
| 2024-02-01 18Z | 20.9°S 158.6°E | 25 | 1003 | TD |
| 2024-02-02 00Z | 20.6°S 159.5°E | 25 | 1003 | TD |
| 2024-02-02 06Z | 20.7°S 160.0°E | 25 | 1003 | TD |
| 2024-02-02 12Z | 20.8°S 160.5°E | 20 | 1005 | TD |
| 2024-02-02 18Z | 20.1°S 161.5°E | 20 | 1005 | TD |
| 2024-02-03 00Z | 19.5°S 162.6°E | 20 | 1005 | TD |
| 2024-02-03 06Z | 19.1°S 163.1°E | 20 | 1005 | TD |
| 2024-02-03 12Z | 18.6°S 163.4°E | 25 | 1003 | TD |
| 2024-02-03 18Z | 18.3°S 163.3°E | 20 | 1004 | TD |
| 2024-02-04 00Z | 18.0°S 163.1°E | 20 | 1005 | TD |
| 2024-02-04 06Z | 17.9°S 162.5°E | 20 | 1005 | TD |
| 2024-02-04 12Z | 18.0°S 161.8°E | 20 | 1005 | TD |
| 2024-02-04 18Z | 18.0°S 161.0°E | 20 | 1006 | TD |
| 2024-02-05 00Z | 17.9°S 160.1°E | 20 | 1006 | TD |
| 2024-02-05 06Z | 18.4°S 159.4°E | 20 | 1005 | TD |
| 2024-02-05 12Z | 18.4°S 159.3°E | 20 | 1005 | TD |
| 2024-02-05 18Z | 18.3°S 159.3°E | 20 | 1005 | TD |
| 2024-02-06 00Z | 18.2°S 159.4°E | 20 | 1005 | TD |
| 2024-02-06 06Z | 17.8°S 159.1°E | 20 | 1005 | TD |
| 2024-02-06 12Z | 17.2°S 159.0°E | 20 | 1004 | TD |
| 2024-02-06 18Z | 16.8°S 159.0°E | 20 | 1004 | TD |
| 2024-02-07 00Z | 16.5°S 159.3°E | 20 | 1004 | TD |
| 2024-02-07 06Z | 16.2°S 159.7°E | 25 | 1001 | TD |
| 2024-02-07 12Z | 15.8°S 160.2°E | 25 | 1001 | TD |
| 2024-02-07 18Z | 15.5°S 161.3°E | 30 | 999 | TD |
| 2024-02-08 00Z | 15.4°S 162.5°E | 30 | 999 | TD |
| 2024-02-08 06Z | 15.6°S 163.3°E | 35 | 997 | TS |
| 2024-02-08 12Z | 16.0°S 164.0°E | 40 | 995 | TS |
| 2024-02-08 18Z | 16.3°S 164.6°E | 35 | 998 | TS |
| 2024-02-09 00Z | 16.5°S 165.1°E | 35 | 998 | TS |
| 2024-02-09 06Z | 16.7°S 165.5°E | 35 | 998 | TS |
| 2024-02-09 12Z | 16.9°S 166.0°E | 35 | 998 | TS |
| 2024-02-09 18Z | 17.2°S 167.2°E | 35 | 998 | TS |
| 2024-02-10 00Z | 17.5°S 168.5°E | 35 | 999 | TS |
| 2024-02-10 06Z | 18.0°S 170.6°E | 30 | 1000 | TD |
| 2024-02-10 12Z | 18.5°S 172.5°E | 35 | 999 | TS |
| 2024-02-10 18Z | 18.9°S 173.5°E | 35 | 999 | TS |
| 2024-02-11 00Z | 19.2°S 174.6°E | 35 | 999 | TS |
| 2024-02-11 06Z | 19.0°S 175.2°E | 30 | 1002 | TD |
| 2024-02-11 12Z | 18.7°S 175.7°E | 30 | 1002 | TD |
| 2024-02-11 18Z | 18.9°S 176.0°E | 25 | 1003 | TD |
| 2024-02-12 00Z | 19.2°S 176.1°E | 25 | 1003 | TD |
| 2024-02-12 06Z | 19.1°S 176.6°E | 25 | 1003 | TD |
| 2024-02-12 12Z | 19.1°S 176.3°E | 25 | 1003 | TD |
| 2024-02-12 18Z | 19.0°S 175.9°E | 20 | 1004 | TD |
| 2024-02-13 00Z | 18.8°S 175.6°E | 20 | 1004 | TD |
| 2024-02-13 06Z | 18.3°S 174.8°E | 15 | 1004 | TD |