Unnamed hurricane (1947)
Unnamed hurricane reached Category 4 in the North Atlantic between September 4, 1947 and September 21, 1947, with a lowest pressure of 938 mb, and made landfall.
Radar
Reflectivity now over Unnamed hurricane. Open it to see storms, cones and warnings on the map.
Radar mosaic and map layers from NOAA MRMS. Boundaries from the Iowa Environmental Mesonet.
The storm
- Basin
- North Atlantic
- Dates
- September 4, 1947 to September 21, 1947
- Peak strength
- Category 4, 125 kt (144 mph)
- Lowest pressure
- 938 mb (27.70 inHg)
- Landfall
- Yes
- Accumulated cyclone energy
- 41.4
- Fastest the center moved
- 22 kt (25 mph)
- Identifier
- AL041947
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.
Landfalls
| Time (UTC) | Where | Position | Wind | Pressure |
|---|---|---|---|---|
| Sep 16, 19:00 | Coast unnamed here | 26.7N 77.1W | 105 kt (121 mph) | 954 mb |
| Sep 17, 16:30 | Sunrise, FL, 4 km away | 26.1N 80.1W | 115 kt (132 mph) | 943 mb |
| Sep 19, 14:00 | Port Sulphur, LA, 23 km away | 29.6N 89.5W | 95 kt (109 mph) | 966 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 |
|---|---|---|---|---|
| Sep 4, 06:00 | 14.5N 20.1W | 30 kt | Tropical depression | |
| Sep 4, 12:00 | 14.3N 21.5W | 30 kt | Tropical depression | |
| Sep 4, 18:00 | 14.2N 22.8W | 30 kt | Tropical depression | |
| Sep 5, 00:00 | 14.1N 24.0W | 35 kt | Tropical storm | |
| Sep 5, 06:00 | 14.0N 25.0W | 35 kt | Tropical storm | |
| Sep 5, 12:00 | 14.0N 26.1W | 40 kt | Tropical storm | |
| Sep 5, 18:00 | 14.0N 27.1W | 40 kt | Tropical storm | |
| Sep 6, 00:00 | 14.1N 28.2W | 45 kt | Tropical storm | |
| Sep 6, 06:00 | 14.2N 29.3W | 45 kt | Tropical storm | |
| Sep 6, 12:00 | 14.3N 30.4W | 50 kt | Tropical storm | |
| Sep 6, 18:00 | 14.3N 31.5W | 50 kt | Tropical storm | |
| Sep 7, 00:00 | 14.2N 32.6W | 50 kt | Tropical storm | |
| Sep 7, 06:00 | 14.1N 33.7W | 50 kt | Tropical storm | |
| Sep 7, 12:00 | 14.0N 34.8W | 50 kt | Tropical storm | |
| Sep 7, 18:00 | 13.9N 36.0W | 50 kt | Tropical storm | |
| Sep 8, 00:00 | 13.8N 37.2W | 50 kt | Tropical storm | |
| Sep 8, 06:00 | 13.7N 38.5W | 50 kt | Tropical storm | |
| Sep 8, 12:00 | 13.6N 39.8W | 50 kt | Tropical storm | |
| Sep 8, 18:00 | 13.5N 41.0W | 50 kt | Tropical storm | |
| Sep 9, 00:00 | 13.4N 42.0W | 50 kt | Tropical storm | |
| Sep 9, 06:00 | 13.3N 42.9W | 50 kt | Tropical storm | |
| Sep 9, 12:00 | 13.2N 43.8W | 50 kt | Tropical storm | |
| Sep 9, 18:00 | 13.2N 44.8W | 50 kt | Tropical storm | |
| Sep 10, 00:00 | 13.3N 45.7W | 50 kt | Tropical storm | |
| Sep 10, 06:00 | 13.5N 46.7W | 50 kt | Tropical storm | |
| Sep 10, 12:00 | 13.8N 47.6W | 50 kt | Tropical storm | |
| Sep 10, 18:00 | 14.1N 48.4W | 50 kt | Tropical storm | |
| Sep 11, 00:00 | 14.4N 49.0W | 50 kt | Tropical storm | |
| Sep 11, 06:00 | 14.8N 49.8W | 50 kt | Tropical storm | |
| Sep 11, 12:00 | 15.2N 51.0W | 50 kt | 999 mb | Tropical storm |
| Sep 11, 18:00 | 15.7N 52.5W | 55 kt | Tropical storm | |
| Sep 12, 00:00 | 16.3N 54.5W | 65 kt | Hurricane | |
| Sep 12, 06:00 | 16.9N 56.5W | 75 kt | Hurricane | |
| Sep 12, 12:00 | 17.6N 58.4W | 85 kt | 977 mb | Hurricane |
| Sep 12, 18:00 | 18.6N 60.3W | 90 kt | Hurricane | |
| Sep 13, 00:00 | 19.6N 62.2W | 95 kt | Hurricane | |
| Sep 13, 06:00 | 20.6N 64.0W | 100 kt | Hurricane | |
| Sep 13, 12:00 | 21.4N 65.4W | 105 kt | Hurricane | |
| Sep 13, 18:00 | 22.0N 66.4W | 110 kt | 952 mb | Hurricane |
| Sep 14, 00:00 | 22.6N 67.4W | 115 kt | Hurricane | |
| Sep 14, 06:00 | 23.2N 68.4W | 120 kt | Hurricane | |
| Sep 14, 12:00 | 23.7N 69.4W | 125 kt | Hurricane | |
| Sep 14, 18:00 | 24.2N 70.4W | 125 kt | 938 mb | Hurricane |
| Sep 15, 00:00 | 24.8N 71.6W | 125 kt | Hurricane | |
| Sep 15, 06:00 | 25.4N 72.8W | 125 kt | Hurricane | |
| Sep 15, 12:00 | 26.0N 73.7W | 120 kt | Hurricane | |
| Sep 15, 18:00 | 26.5N 74.5W | 115 kt | Hurricane | |
| Sep 16, 00:00 | 26.7N 75.2W | 110 kt | 951 mb | Hurricane |
| Sep 16, 06:00 | 26.8N 75.7W | 110 kt | 954 mb | Hurricane |
| Sep 16, 12:00 | 26.9N 76.2W | 105 kt | 956 mb | Hurricane |
| Sep 16, 18:00 | 26.7N 76.9W | 105 kt | 954 mb | Hurricane |
| Sep 16, 19:00 landfall | 26.7N 77.1W | 105 kt | 954 mb | Hurricane |
| Sep 17, 00:00 | 26.6N 77.8W | 105 kt | Hurricane | |
| Sep 17, 06:00 | 26.5N 78.6W | 110 kt | Hurricane | |
| Sep 17, 12:00 | 26.3N 79.5W | 115 kt | 943 mb | Hurricane |
| Sep 17, 16:30 landfall | 26.1N 80.1W | 115 kt | 943 mb | Hurricane |
| Sep 17, 18:00 | 26.1N 80.4W | 105 kt | 951 mb | Hurricane |
| Sep 18, 00:00 | 26.2N 81.3W | 90 kt | Hurricane | |
| Sep 18, 06:00 | 26.5N 82.3W | 85 kt | Hurricane | |
| Sep 18, 12:00 | 26.8N 83.4W | 85 kt | Hurricane | |
| Sep 18, 18:00 | 27.2N 84.5W | 90 kt | Hurricane | |
| Sep 19, 00:00 | 27.7N 85.7W | 95 kt | Hurricane | |
| Sep 19, 06:00 | 28.4N 87.3W | 95 kt | Hurricane | |
| Sep 19, 12:00 | 29.4N 89.0W | 95 kt | 966 mb | Hurricane |
| Sep 19, 14:00 landfall | 29.6N 89.5W | 95 kt | 966 mb | Hurricane |
| Sep 19, 18:00 | 30.1N 90.7W | 80 kt | 970 mb | Hurricane |
| Sep 20, 00:00 | 30.8N 92.2W | 60 kt | 981 mb | Tropical storm |
| Sep 20, 06:00 | 31.6N 93.7W | 40 kt | 987 mb | Tropical storm |
| Sep 20, 12:00 | 32.7N 95.2W | 35 kt | 994 mb | Tropical storm |
| Sep 20, 18:00 | 33.7N 95.9W | 30 kt | 996 mb | Tropical depression |
| Sep 21, 00:00 | 35.0N 95.0W | 25 kt | 997 mb | Tropical depression |
| Sep 21, 06:00 | 36.4N 93.3W | 20 kt | 999 mb | Tropical depression |
| Sep 21, 12:00 | 38.0N 91.5W | 20 kt | 1000 mb | Extratropical |
Other North Atlantic storms of 1947
- Unnamed tropical stormNorth Atlantic · 1947
- Unnamed hurricaneNorth Atlantic · 1947
- Unnamed hurricaneNorth Atlantic · 1947
- Unnamed tropical stormNorth Atlantic · 1947
- Unnamed tropical stormNorth Atlantic · 1947
- Unnamed tropical stormNorth Atlantic · 1947
- Unnamed tropical stormNorth Atlantic · 1947
- Unnamed hurricaneNorth Atlantic · 1947
- Unnamed hurricaneNorth Atlantic · 1947
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.