Unnamed tropical depression (1991)
Unnamed tropical depression peaked at 30 kt in the South Indian between September 19, 1990 and September 25, 1990.
Track and intensity
The whole track of Unnamed tropical depression, colored by strength, with the other storms of the 1991 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 Indian
- Dates
- September 19, 1990 to September 25, 1990
- Peak strength
- Tropical Depression, 30 kt (35 mph)
- Landfall
- No; closest approach 931 km (578 mi)
- Accumulated cyclone energy
- 0.0
- Identifier
- SH011991
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 19, 06:00 | 6.9S 73.8E | 15 kt | Tropical storm | |
| Sep 19, 12:00 | 6.7S 73.5E | 20 kt | Tropical storm | |
| Sep 19, 18:00 | 6.5S 73.1E | 20 kt | Tropical storm | |
| Sep 20, 00:00 | 6.4S 72.8E | 25 kt | Tropical storm | |
| Sep 20, 06:00 | 6.3S 72.5E | 25 kt | Tropical storm | |
| Sep 20, 12:00 | 6.2S 72.2E | 30 kt | Tropical storm | |
| Sep 20, 18:00 | 6.2S 71.8E | 30 kt | Tropical storm | |
| Sep 21, 00:00 | 6.5S 71.3E | 30 kt | Tropical storm | |
| Sep 21, 06:00 | 6.9S 70.7E | 30 kt | Tropical storm | |
| Sep 21, 12:00 | 7.2S 70.1E | 30 kt | Tropical storm | |
| Sep 21, 18:00 | 7.5S 69.4E | 30 kt | Tropical storm | |
| Sep 22, 00:00 | 7.9S 68.7E | 30 kt | Tropical storm | |
| Sep 22, 06:00 | 8.2S 67.8E | 30 kt | Tropical storm | |
| Sep 22, 12:00 | 8.5S 66.9E | 30 kt | Tropical storm | |
| Sep 22, 18:00 | 8.7S 66.1E | 30 kt | Tropical storm | |
| Sep 23, 00:00 | 8.8S 65.4E | 30 kt | Tropical storm | |
| Sep 23, 06:00 | 8.7S 64.6E | 30 kt | Tropical storm | |
| Sep 23, 12:00 | 8.5S 63.9E | 30 kt | Tropical storm | |
| Sep 23, 18:00 | 8.4S 62.9E | 30 kt | Tropical storm | |
| Sep 24, 00:00 | 8.6S 61.9E | 30 kt | Tropical storm | |
| Sep 24, 06:00 | 8.7S 61.0E | 30 kt | Tropical storm | |
| Sep 24, 12:00 | 8.7S 60.2E | 30 kt | Tropical storm | |
| Sep 24, 18:00 | 8.7S 59.4E | 30 kt | Tropical storm | |
| Sep 25, 00:00 | 8.7S 58.7E | 30 kt | Tropical storm | |
| Sep 25, 06:00 | 8.7S 57.9E | 30 kt | Tropical storm | |
| Sep 25, 12:00 | 8.7S 57.2E | 25 kt | Tropical storm |
Other South Indian storms of 1991
- Unnamed tropical depressionSouth Indian · 1991
- Unnamed tropical stormSouth Indian · 1991
- Tropical Storm LaurenceSouth Indian · 1991
- Cyclone AlisonSouth Indian · 1991
- Cyclone BellaSouth Indian · 1991
- Tropical Storm ChrisSouth Indian · 1991
- Tropical Storm CynthiaSouth Indian · 1991
- Cyclone DebraSouth Indian · 1991
- Tropical Storm ElmaSouth Indian · 1991
- Cyclone FatimaSouth Indian · 1991
- Cyclone ErrolSouth Indian · 1991
- Unnamed tropical depressionSouth Indian · 1991
- Cyclone MarianSouth Indian · 1991
- Tropical Storm FifiSouth Indian · 1991
- Tropical Storm GritelleSouth Indian · 1991
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.