2024 tropical cyclone season · Southern Hemisphere
Cyclone Jasper Jasper · SH032024
Cyclone Jasper was tracked in the Southern Hemisphere from 2023-12-02 to 2023-12-17 (15 days), peaking at 120 kt (H4) with a minimum pressure of 937 hPa. 233 archived forecasts from ECMWF, ECMWF ENS, GFS, GEFS are verified against its best track; at 48 hours the closest was ECMWF ENS, 88 km off on average.
- ATCF ID
- SH032024
- Basin
- Southern Hemisphere
- Tracked
- 2023-12-02 → 2023-12-17 (15 days)
- Peak wind
- 120 kt · 62 m/s · H4
- Minimum pressure
- 937 hPa
- Archived forecasts
- 233
- Sources
- ECMWF · ECMWF ENS · GFS · GEFS
Forecast track error (km)
| Source | 24 h | 48 h | 72 h | 120 h |
|---|---|---|---|---|
| ECMWF | 62 (35) | 96 (31) | 132 (27) | 203 (8) |
| ECMWF ENS | 51 (38) | 88 (34) | 131 (30) | 199 (22) |
| GFS | 66 (35) | 97 (31) | 138 (27) | 153 (19) |
| GEFS | 61 (35) | 92 (31) | 124 (27) | 125 (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 |
|---|---|---|---|---|
| 2023-12-03 12Z | 7.8°S 160.9°E | 15 | 1010 | TD |
| 2023-12-03 18Z | 7.4°S 159.8°E | 15 | 1010 | TD |
| 2023-12-04 00Z | 7.7°S 158.7°E | 20 | 998 | TD |
| 2023-12-04 06Z | 8.1°S 158.4°E | 20 | 997 | TD |
| 2023-12-04 12Z | 8.5°S 158.0°E | 25 | 995 | TD |
| 2023-12-04 18Z | 8.8°S 157.6°E | 30 | 994 | TD |
| 2023-12-05 00Z | 9.1°S 157.4°E | 40 | 997 | TS |
| 2023-12-05 06Z | 9.4°S 157.2°E | 40 | 996 | TS |
| 2023-12-05 12Z | 9.5°S 157.3°E | 45 | 995 | TS |
| 2023-12-05 18Z | 10.1°S 157.3°E | 50 | 991 | TS |
| 2023-12-06 00Z | 10.6°S 157.3°E | 60 | 986 | TS |
| 2023-12-06 06Z | 11.1°S 157.2°E | 70 | 978 | H1 |
| 2023-12-06 12Z | 11.5°S 157.1°E | 75 | 977 | H1 |
| 2023-12-06 18Z | 11.7°S 157.0°E | 80 | 974 | H1 |
| 2023-12-07 00Z | 12.2°S 156.9°E | 85 | 967 | H2 |
| 2023-12-07 06Z | 12.6°S 156.8°E | 95 | 959 | H2 |
| 2023-12-07 12Z | 13.1°S 156.8°E | 105 | 950 | H3 |
| 2023-12-07 18Z | 13.5°S 156.8°E | 115 | 940 | H4 |
| 2023-12-08 00Z | 14.2°S 156.6°E | 120 | 937 | H4 |
| 2023-12-08 06Z | 14.6°S 156.5°E | 115 | 943 | H4 |
| 2023-12-08 12Z | 15.1°S 156.6°E | 105 | 952 | H3 |
| 2023-12-08 18Z | 15.3°S 156.2°E | 95 | 959 | H2 |
| 2023-12-09 00Z | 15.4°S 155.8°E | 90 | 964 | H2 |
| 2023-12-09 06Z | 15.6°S 155.5°E | 75 | 973 | H1 |
| 2023-12-09 12Z | 15.9°S 155.0°E | 70 | 977 | H1 |
| 2023-12-09 18Z | 16.0°S 154.8°E | 60 | 983 | TS |
| 2023-12-10 00Z | 16.3°S 154.3°E | 60 | 982 | TS |
| 2023-12-10 06Z | 16.7°S 153.6°E | 60 | 983 | TS |
| 2023-12-10 12Z | 17.2°S 152.7°E | 55 | 986 | TS |
| 2023-12-10 18Z | 17.4°S 151.6°E | 50 | 990 | TS |
| 2023-12-11 00Z | 17.8°S 150.3°E | 40 | 994 | TS |
| 2023-12-11 06Z | 17.4°S 149.7°E | 40 | 994 | TS |
| 2023-12-11 12Z | 17.0°S 149.0°E | 40 | 994 | TS |
| 2023-12-11 18Z | 16.5°S 148.2°E | 45 | 992 | TS |
| 2023-12-12 00Z | 16.2°S 147.9°E | 45 | 993 | TS |
| 2023-12-12 06Z | 15.9°S 147.6°E | 45 | 993 | TS |
| 2023-12-12 12Z | 15.6°S 147.4°E | 50 | 992 | TS |
| 2023-12-12 18Z | 15.4°S 147.0°E | 50 | 990 | TS |
| 2023-12-13 00Z | 15.7°S 146.4°E | 50 | 990 | TS |
| 2023-12-13 06Z | 15.8°S 145.7°E | 50 | 988 | TS |
| 2023-12-13 12Z | 15.9°S 145.3°E | 45 | 995 | TS |
| 2023-12-13 18Z | 16.0°S 144.4°E | 35 | 1000 | TS |
| 2023-12-14 00Z | 16.0°S 144.0°E | 25 | 997 | TD |
| 2023-12-14 06Z | 16.0°S 143.7°E | 25 | 996 | TD |
| 2023-12-14 12Z | 15.9°S 143.4°E | 25 | 996 | TD |
| 2023-12-14 18Z | 15.9°S 143.2°E | 25 | 995 | TD |
| 2023-12-15 00Z | 15.9°S 143.0°E | 20 | 995 | TD |
| 2023-12-15 06Z | 15.8°S 142.5°E | 20 | 995 | TD |
| 2023-12-15 12Z | 15.7°S 142.3°E | 20 | 996 | TD |
| 2023-12-15 18Z | 15.8°S 142.0°E | 20 | 996 | TD |
| 2023-12-16 00Z | 15.8°S 141.7°E | 20 | 996 | TD |
| 2023-12-16 06Z | 15.6°S 141.6°E | 20 | 996 | TD |
| 2023-12-16 12Z | 15.4°S 141.5°E | 20 | 996 | TD |