Unnamed tropical storm (2021)
Unnamed tropical storm peaked at 40 kt in the South Pacific between December 9, 2020 and December 12, 2020, with a lowest pressure of 999 mb.
Radar
Reflectivity now over Unnamed tropical storm. 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
- South Pacific
- Dates
- December 9, 2020 to December 12, 2020
- Peak strength
- Tropical Storm, 40 kt (46 mph)
- Lowest pressure
- 999 mb (29.50 inHg)
- Landfall
- No; closest approach 278 km (173 mi)
- Accumulated cyclone energy
- 0.8
- Identifier
- SH042021
Deaths and damage
No source this site reads carries a casualty or damage figure for this storm.
Track
| Time (UTC) | Position | Wind | Pressure | Status |
|---|---|---|---|---|
| Dec 9, 18:00 | 12.8S 176.6W | 25 kt | 1004 mb | Tropical depression |
| Dec 10, 00:00 | 12.4S 178.2W | 20 kt | 1007 mb | Disturbance |
| Dec 10, 06:00 | 12.6S 178.7W | 30 kt | 1003 mb | Tropical depression |
| Dec 10, 12:00 | 12.6S 179.3W | 30 kt | 1002 mb | Tropical depression |
| Dec 10, 18:00 | 12.5S 179.8W | 30 kt | 1002 mb | Tropical depression |
| Dec 11, 00:00 | 12.4S 179.6E | 35 kt | 1001 mb | Tropical storm |
| Dec 11, 06:00 | 12.9S 179.0E | 35 kt | 1000 mb | Tropical storm |
| Dec 11, 12:00 | 13.1S 178.7E | 35 kt | 999 mb | Tropical storm |
| Dec 11, 18:00 | 14.2S 177.8E | 35 kt | 1001 mb | Tropical storm |
| Dec 12, 00:00 | 14.9S 176.2E | 40 kt | 1000 mb | Tropical storm |
| Dec 12, 06:00 | 15.8S 174.6E | 35 kt | 1000 mb | Tropical storm |
| Dec 12, 12:00 | 15.9S 173.3E | 30 kt | 1002 mb | Tropical depression |
| Dec 12, 18:00 | 15.5S 171.6E | 25 kt | 1004 mb | Tropical depression |
Other South Pacific storms of 2021
- Cyclone YasaSouth Pacific · 2021
- Tropical Storm ZazuSouth Pacific · 2021
- Tropical Depression ZazuSouth Pacific · 2021
- Tropical Storm ImogenSouth Pacific · 2021
- Tropical Storm KimiSouth Pacific · 2021
- Cyclone LucasSouth Pacific · 2021
- Cyclone AnaSouth Pacific · 2021
- Tropical Storm BinaSouth Pacific · 2021
- Unnamed tropical stormSouth Pacific · 2021
- Cyclone NiranSouth Pacific · 2021
- Unnamed tropical stormSouth Pacific · 2021
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.