Tropical Storm Atu (1984)
Tropical Storm Atu peaked at 35 kt in the South Pacific between December 26, 1983 and December 31, 1983, with a lowest pressure of 987 mb.
Track and intensity
The whole track of Tropical Storm Atu, colored by strength, with the other storms of the 1984 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
- South Pacific
- Dates
- December 26, 1983 to December 31, 1983
- Peak strength
- Tropical Storm, 35 kt (40 mph)
- Lowest pressure
- 987 mb (29.15 inHg)
- Landfall
- No; closest approach 223 km (139 mi)
- Accumulated cyclone energy
- 0.2
- Identifier
- SH111984
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 |
|---|---|---|---|---|
| Dec 26, 06:00 | 12.9S 174.1E | 15 kt | Tropical storm | |
| Dec 26, 12:00 | 13.4S 173.8E | 15 kt | Tropical storm | |
| Dec 26, 18:00 | 13.9S 173.4E | 15 kt | Tropical storm | |
| Dec 27, 00:00 | 14.3S 172.9E | 15 kt | Mixed | |
| Dec 27, 06:00 | 14.6S 172.2E | 20 kt | Mixed | |
| Dec 27, 12:00 | 15.0S 171.3E | 20 kt | Mixed | |
| Dec 27, 18:00 | 15.5S 170.4E | 25 kt | 995 mb | Mixed |
| Dec 28, 00:00 | 16.3S 170.0E | 25 kt | Tropical storm | |
| Dec 28, 06:00 | 17.4S 170.2E | 25 kt | 987 mb | Tropical storm |
| Dec 28, 12:00 | 18.6S 170.8E | 25 kt | Tropical storm | |
| Dec 28, 18:00 | 19.8S 171.4E | 30 kt | 987 mb | Tropical storm |
| Dec 29, 00:00 | 20.5S 172.0E | 30 kt | Tropical storm | |
| Dec 29, 06:00 | 20.9S 172.6E | 35 kt | 990 mb | Tropical storm |
| Dec 29, 12:00 | 21.2S 173.1E | 35 kt | Tropical storm | |
| Dec 29, 18:00 | 21.4S 173.4E | 30 kt | 995 mb | Tropical storm |
| Dec 30, 00:00 | 21.6S 173.3E | Tropical storm | ||
| Dec 30, 06:00 | 22.0S 173.7E | 30 kt | 997 mb | Tropical storm |
| Dec 30, 12:00 | 22.5S 174.0E | Tropical storm | ||
| Dec 30, 18:00 | 22.9S 174.3E | Tropical storm | ||
| Dec 31, 00:00 | 23.3S 174.5E | Tropical storm |
Other South Pacific storms of 1984
- Tropical Storm FritzSouth Pacific · 1984
- Cyclone GraceSouth Pacific · 1984
- Cyclone BetiSouth Pacific · 1984
- Tropical Storm HarveySouth Pacific · 1984
- Tropical Storm IngridSouth Pacific · 1984
- Unnamed tropical stormSouth Pacific · 1984
- Tropical Storm JimSouth Pacific · 1984
- Tropical Storm CyrilSouth Pacific · 1984
- Cyclone KathySouth Pacific · 1984
- Unnamed tropical stormSouth Pacific · 1984
- Tropical Storm LanceSouth Pacific · 1984
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.