Unnamed Tropical Storm, AL03 1870
Sep 1, 12:00 AM UTC – Sep 4, 6:00 PM UTC (3.8 days)
- Peak
- Tropical Storm
- Max sustained wind
- 70 mph (60 kt)
- Lowest pressure
- 1004 mb
- Landfalls
- 0
Track
- Hurricane
- Tropical Storm
- Tropical Depression
- Other
- Large white-ringed dots: landfall
Every track point (16)
| UTC | Status | Position | Wind kt | mb | Note |
|---|---|---|---|---|---|
| 1870-09-01 00:00 | TS | 16.0°N 27.6°W | 50 | — | |
| 1870-09-01 06:00 | TS | 16.2°N 29.0°W | 50 | — | |
| 1870-09-01 12:00 | TS | 16.4°N 30.4°W | 60 | — | |
| 1870-09-01 18:00 | TS | 16.6°N 32.0°W | 60 | — | |
| 1870-09-02 00:00 | TS | 16.7°N 34.0°W | 60 | — | |
| 1870-09-02 06:00 | TS | 17.1°N 36.0°W | 60 | — | |
| 1870-09-02 12:00 | TS | 17.2°N 38.0°W | 60 | — | |
| 1870-09-02 18:00 | TS | 17.5°N 39.8°W | 60 | — | |
| 1870-09-03 00:00 | TS | 17.7°N 41.7°W | 50 | — | |
| 1870-09-03 06:00 | TS | 18.0°N 43.7°W | 50 | — | |
| 1870-09-03 12:00 | TS | 18.2°N 45.7°W | 50 | — | |
| 1870-09-03 18:00 | TS | 18.4°N 47.3°W | 50 | — | |
| 1870-09-04 00:00 | TS | 18.7°N 49.0°W | 40 | — | |
| 1870-09-04 06:00 | TS | 19.0°N 50.9°W | 40 | — | |
| 1870-09-04 12:00 | TS | 19.2°N 53.0°W | 40 | 1004 | |
| 1870-09-04 18:00 | TS | 19.7°N 55.0°W | 40 | — |
From the National Hurricane Center's best-track archive (HURDAT2), its post-season reanalysis; values can differ from the advisories issued at the time. Source: hurdat2-1851-2025-092326.txt, hurdat2-nepac-1949-2025-092926.txt.