Tropical Storm Dorothy (1970)
Tropical Storm Dorothy peaked at 60 kt in the North Atlantic between August 18, 1970 and August 22, 1970, with a lowest pressure of 996 mb, and made landfall.
Track and intensity
The whole track of Tropical Storm Dorothy, colored by strength, with the other storms of the 1970 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
- August 18, 1970 to August 22, 1970
- Peak strength
- Tropical Storm, 60 kt (69 mph)
- Lowest pressure
- 996 mb (29.41 inHg)
- Landfall
- Yes
- Accumulated cyclone energy
- 3.3
- Fastest the center moved
- 16 kt (18 mph)
- Identifier
- AL091970
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.
Landfall
| Time (UTC) | Where | Position | Wind | Pressure |
|---|---|---|---|---|
| Aug 20, 19:00 | Le François, Martinique, Martinique, 17 km away | 14.5N 60.8W | 60 kt (69 mph) | 1000 mb |
Landfall points the US agencies flagged in the best track. The nearest town is named from the site’s gazetteer, not from the report.
Track
| Time (UTC) | Position | Wind | Pressure | Status |
|---|---|---|---|---|
| Aug 18, 00:00 | 11.5N 44.3W | 25 kt | Tropical depression | |
| Aug 18, 06:00 | 11.8N 45.9W | 25 kt | Tropical depression | |
| Aug 18, 12:00 | 12.1N 47.5W | 30 kt | Tropical depression | |
| Aug 18, 18:00 | 12.4N 49.1W | 35 kt | Tropical storm | |
| Aug 19, 00:00 | 12.8N 50.7W | 40 kt | Tropical storm | |
| Aug 19, 06:00 | 13.1N 52.2W | 45 kt | Tropical storm | |
| Aug 19, 12:00 | 13.3N 53.7W | 50 kt | 1001 mb | Tropical storm |
| Aug 19, 18:00 | 13.5N 55.1W | 50 kt | 1005 mb | Tropical storm |
| Aug 20, 00:00 | 13.7N 56.5W | 50 kt | 1003 mb | Tropical storm |
| Aug 20, 06:00 | 13.8N 58.0W | 60 kt | 996 mb | Tropical storm |
| Aug 20, 12:00 | 14.1N 59.5W | 60 kt | 998 mb | Tropical storm |
| Aug 20, 18:00 | 14.5N 60.6W | 60 kt | 1000 mb | Tropical storm |
| Aug 20, 19:00 landfall | 14.5N 60.8W | 60 kt | 1000 mb | Tropical storm |
| Aug 21, 00:00 | 14.7N 62.0W | 55 kt | 1002 mb | Tropical storm |
| Aug 21, 06:00 | 14.8N 63.5W | 50 kt | 1004 mb | Tropical storm |
| Aug 21, 12:00 | 15.0N 64.8W | 40 kt | 1006 mb | Tropical storm |
| Aug 21, 18:00 | 15.2N 66.0W | 40 kt | 1005 mb | Tropical storm |
| Aug 22, 00:00 | 15.4N 67.2W | 35 kt | 1007 mb | Tropical storm |
Other North Atlantic storms of 1970
- Hurricane AlmaNorth Atlantic · 1970
- Tropical Storm BeckyNorth Atlantic · 1970
- Unnamed tropical depressionNorth Atlantic · 1970
- Hurricane CeliaNorth Atlantic · 1970
- Unnamed tropical depressionNorth Atlantic · 1970
- Unnamed hurricaneNorth Atlantic · 1970
- Unnamed tropical depressionNorth Atlantic · 1970
- Unnamed tropical depressionNorth Atlantic · 1970
- Unnamed tropical stormNorth Atlantic · 1970
- Unnamed tropical depressionNorth Atlantic · 1970
- Hurricane EllaNorth Atlantic · 1970
- Tropical Storm FeliceNorth Atlantic · 1970
- Unnamed tropical stormNorth Atlantic · 1970
- Unnamed tropical depressionNorth Atlantic · 1970
- Tropical Storm GretaNorth Atlantic · 1970
- Unnamed hurricaneNorth Atlantic · 1970
- Unnamed hurricaneNorth Atlantic · 1970
- Unnamed hurricaneNorth Atlantic · 1970
- Unnamed tropical depressionNorth Atlantic · 1970
- Unnamed tropical stormNorth Atlantic · 1970
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.