Unnamed hurricane (1870)
Unnamed hurricane reached Category 1 in the North Atlantic between September 17, 1870 and September 20, 1870, with a lowest pressure of 969 mb.
Track and intensity
The whole track of Unnamed hurricane, colored by strength, with the other storms of the 1870 season in the same basin behind it, and its wind and pressure hour by hour. Every fix is in the track table below.
The storm
- Basin
- North Atlantic
- Dates
- September 17, 1870 to September 20, 1870
- Peak strength
- Category 1, 80 kt (92 mph)
- Lowest pressure
- 969 mb (28.61 inHg)
- Landfall
- No; closest approach 227 km (141 mi)
- Accumulated cyclone energy
- 7.4
- Identifier
- AL051870
Deaths and damage
No source this site reads publishes a machine-readable casualty or damage figure for a storm of this era. The National Hurricane Center’s season tables begin in 1995 and carry deaths and damage only from 2005 in the Atlantic and 2020 in both basins; the US Storm Events record begins in 1996.
Track
| Time (UTC) | Position | Wind | Pressure | Status |
|---|---|---|---|---|
| Sep 17, 00:00 | 30.2N 68.1W | 80 kt | Hurricane | |
| Sep 17, 06:00 | 31.0N 68.6W | 80 kt | Hurricane | |
| Sep 17, 12:00 | 31.9N 69.0W | 80 kt | Hurricane | |
| Sep 17, 18:00 | 33.0N 69.5W | 80 kt | Hurricane | |
| Sep 18, 00:00 | 34.3N 69.8W | 80 kt | Hurricane | |
| Sep 18, 06:00 | 35.9N 69.5W | 80 kt | Hurricane | |
| Sep 18, 12:00 | 37.3N 69.0W | 80 kt | Hurricane | |
| Sep 18, 18:00 | 39.3N 67.1W | 80 kt | Hurricane | |
| Sep 19, 00:00 | 40.8N 64.1W | 80 kt | 969 mb | Hurricane |
| Sep 19, 06:00 | 41.8N 60.9W | 80 kt | Hurricane | |
| Sep 19, 12:00 | 42.8N 57.4W | 70 kt | Hurricane | |
| Sep 19, 18:00 | 44.5N 53.0W | 70 kt | Hurricane | |
| Sep 20, 00:00 | 47.0N 47.7W | 70 kt | Extratropical | |
| Sep 20, 06:00 | 49.5N 41.9W | 70 kt | Extratropical | |
| Sep 20, 12:00 | 52.1N 37.0W | 70 kt | Extratropical | |
| Sep 20, 18:00 | 55.0N 33.7W | 70 kt | Extratropical |
Other North Atlantic storms of 1870
- Unnamed hurricaneNorth Atlantic · 1870
- Unnamed tropical depressionNorth Atlantic · 1870
- Unnamed hurricaneNorth Atlantic · 1870
- Unnamed hurricaneNorth Atlantic · 1870
- Unnamed tropical depressionNorth Atlantic · 1870
- Unnamed tropical depressionNorth Atlantic · 1870
- Unnamed hurricaneNorth Atlantic · 1870
- Unnamed hurricaneNorth Atlantic · 1870
- Unnamed hurricaneNorth Atlantic · 1870
- Unnamed hurricaneNorth Atlantic · 1870
- Unnamed tropical depressionNorth Atlantic · 1870
- Unnamed hurricaneNorth Atlantic · 1870
- Unnamed tropical depressionNorth Atlantic · 1870
- Unnamed tropical depressionNorth Atlantic · 1870
What this means
A best track is the record a warning agency settles on after the storm, not what it said at the time: position, maximum sustained wind and central pressure every six hours, revised against every observation that came in later. Category is the Saffir-Simpson scale, which runs from Category 1 at 64 kt to Category 5 at 137 kt and reads wind only, so it says nothing about surge or rain. Accumulated cyclone energy adds up the square of the wind through the storm's life, so it counts strength and duration together.
Sources
Storm history from NOAA NCEI’s International Best Track Archive for Climate Stewardship (IBTrACS), which merges the official best track of every warning agency. Live storms, cones, watches and warnings from the National Hurricane Center and the Central Pacific Hurricane Center. Archived radar from NOAA’s Level II archive.
The National Hurricane Center has published no tropical cyclone report for this storm.