Unnamed tropical depression (2009)
Unnamed tropical depression peaked at 30 kt in the Western Pacific between September 26, 2009 and September 30, 2009, with a lowest pressure of 999 mb.
Track and intensity
The whole track of Unnamed tropical depression, colored by strength, with the other storms of the 2009 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
- Western Pacific
- Dates
- September 26, 2009 to September 30, 2009
- Peak strength
- Tropical Depression, 30 kt (35 mph)
- Lowest pressure
- 999 mb (29.50 inHg)
- Landfall
- No; closest approach 1378 km (856 mi)
- Accumulated cyclone energy
- 0.0
- Eyewall radius at its peak
- 45 nmi (83 km, 52 mi)
- Overall size
- 210 nmi (389 km, 242 mi) to the outermost closed isobar
- Peak gust in the best track
- 40 kt (46 mph)
- Fastest the center moved
- 20 kt (23 mph)
- Identifier
- WP182009
Deaths and damage
No source this site reads carries a casualty or damage figure for this storm.
Track
| Time (UTC) | Position | Wind | Pressure | Status |
|---|---|---|---|---|
| Sep 26, 00:00 | 10.4N 163.0E | 15 kt | 1010 mb | Disturbance |
| Sep 26, 06:00 | 10.7N 161.8E | 15 kt | 1010 mb | Disturbance |
| Sep 26, 12:00 | 10.8N 160.6E | 20 kt | 1007 mb | Disturbance |
| Sep 26, 18:00 | 10.4N 159.5E | 20 kt | 1007 mb | Disturbance |
| Sep 27, 00:00 | 10.4N 158.6E | 20 kt | 1007 mb | Disturbance |
| Sep 27, 06:00 | 10.3N 157.7E | 20 kt | 1007 mb | Disturbance |
| Sep 27, 12:00 | 10.3N 157.0E | 25 kt | 1004 mb | Tropical depression |
| Sep 27, 18:00 | 10.0N 156.4E | 30 kt | 1000 mb | Tropical depression |
| Sep 28, 00:00 | 9.4N 155.9E | 30 kt | 1000 mb | Tropical depression |
| Sep 28, 06:00 | 9.1N 154.9E | 30 kt | 1000 mb | Tropical depression |
| Sep 28, 12:00 | 9.3N 154.0E | 30 kt | 1000 mb | Tropical depression |
| Sep 28, 18:00 | 9.8N 153.1E | 30 kt | 999 mb | Tropical depression |
| Sep 29, 00:00 | 10.5N 151.9E | 30 kt | 1000 mb | Tropical depression |
| Sep 29, 06:00 | 11.4N 150.5E | 30 kt | 1000 mb | Tropical depression |
| Sep 29, 12:00 | 12.0N 149.0E | 30 kt | 1000 mb | Tropical depression |
| Sep 29, 18:00 | 12.6N 147.5E | 30 kt | 1000 mb | Tropical depression |
| Sep 30, 00:00 | 13.1N 146.0E | 20 kt | 1007 mb | Disturbance |
| Sep 30, 06:00 | 14.0N 143.5E | Tropical storm |
Other Western Pacific storms of 2009
- Typhoon KujiraWestern Pacific · 2009
- Typhoon Chan-HomWestern Pacific · 2009
- Typhoon LinfaWestern Pacific · 2009
- Tropical Storm NangkaWestern Pacific · 2009
- Tropical Storm SoudelorWestern Pacific · 2009
- Unnamed tropical depressionWestern Pacific · 2009
- Typhoon MolaveWestern Pacific · 2009
- Tropical Storm GoniWestern Pacific · 2009
- Typhoon MorakotWestern Pacific · 2009
- Tropical Storm EtauWestern Pacific · 2009
- Typhoon VamcoWestern Pacific · 2009
- Typhoon KrovanhWestern Pacific · 2009
- Tropical Storm DujuanWestern Pacific · 2009
- Tropical Depression MujigaeWestern Pacific · 2009
- Typhoon KoppuWestern Pacific · 2009
- Super Typhoon Choi-WanWestern Pacific · 2009
- Typhoon KetsanaWestern Pacific · 2009
- Super Typhoon ParmaWestern Pacific · 2009
- Super Typhoon MelorWestern Pacific · 2009
- Tropical Storm NepartakWestern Pacific · 2009
- Super Typhoon LupitWestern Pacific · 2009
- Unnamed tropical depressionWestern Pacific · 2009
- Typhoon MirinaeWestern Pacific · 2009
- Unnamed tropical depressionWestern Pacific · 2009
- Unnamed tropical stormWestern Pacific · 2009
- Unnamed tropical depressionWestern Pacific · 2009
- Super Typhoon NidaWestern Pacific · 2009
- Unnamed tropical depressionWestern Pacific · 2009
- Unnamed tropical stormWestern Pacific · 2009
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.