Cyclone Dianne (2011)
Cyclone Dianne reached Category 1 in the South Indian between February 14, 2011 and February 23, 2011, with a lowest pressure of 963 mb.
Track and intensity
The whole track of Cyclone Dianne, colored by strength, with the other storms of the 2011 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
- February 14, 2011 to February 23, 2011
- Peak strength
- Category 1, 80 kt (92 mph)
- Lowest pressure
- 963 mb (28.44 inHg)
- Landfall
- No; closest approach 281 km (175 mi)
- Accumulated cyclone energy
- 9.7
- Identifier
- SH162011
Deaths and damage
No source this site reads carries a casualty or damage figure for this storm.
Track
| Time (UTC) | Position | Wind | Pressure | Status |
|---|---|---|---|---|
| Feb 14, 06:00 | 16.6S 118.6E | 20 kt | 1000 mb | Tropical storm |
| Feb 14, 12:00 | 17.8S 117.5E | 20 kt | 1000 mb | Tropical storm |
| Feb 14, 18:00 | 18.4S 115.1E | 20 kt | 1007 mb | Disturbance |
| Feb 15, 00:00 | 18.8S 113.9E | 25 kt | 1004 mb | Tropical depression |
| Feb 15, 06:00 | 19.1S 112.8E | 30 kt | 1000 mb | Tropical depression |
| Feb 15, 12:00 | 19.2S 112.1E | 30 kt | 1000 mb | Tropical depression |
| Feb 15, 18:00 | 19.1S 111.8E | 30 kt | 1000 mb | Tropical depression |
| Feb 16, 00:00 | 19.1S 111.5E | 35 kt | 996 mb | Tropical storm |
| Feb 16, 06:00 | 19.1S 111.3E | 40 kt | 993 mb | Tropical storm |
| Feb 16, 12:00 | 19.1S 111.1E | 45 kt | 989 mb | Tropical storm |
| Feb 16, 18:00 | 19.0S 110.9E | 40 kt | 993 mb | Tropical storm |
| Feb 17, 00:00 | 18.8S 110.8E | 40 kt | 993 mb | Tropical storm |
| Feb 17, 06:00 | 18.8S 110.6E | 45 kt | 989 mb | Tropical storm |
| Feb 17, 12:00 | 19.0S 110.5E | 55 kt | 982 mb | Tropical storm |
| Feb 17, 18:00 | 19.3S 110.5E | 60 kt | 978 mb | Tropical storm |
| Feb 18, 00:00 | 19.9S 110.0E | 60 kt | 978 mb | Tropical storm |
| Feb 18, 06:00 | 20.5S 109.4E | 65 kt | 974 mb | Typhoon |
| Feb 18, 12:00 | 20.8S 108.8E | 65 kt | 974 mb | Typhoon |
| Feb 18, 18:00 | 21.1S 108.2E | 75 kt | 967 mb | Typhoon |
| Feb 19, 00:00 | 21.6S 108.0E | 80 kt | 963 mb | Typhoon |
| Feb 19, 06:00 | 22.2S 107.8E | 80 kt | 963 mb | Typhoon |
| Feb 19, 12:00 | 22.7S 107.7E | 80 kt | 963 mb | Typhoon |
| Feb 19, 18:00 | 23.2S 107.5E | 80 kt | 963 mb | Typhoon |
| Feb 20, 00:00 | 23.7S 107.3E | 80 kt | 963 mb | Typhoon |
| Feb 20, 06:00 | 24.3S 106.6E | 75 kt | 967 mb | Typhoon |
| Feb 20, 12:00 | 24.6S 106.0E | 75 kt | 967 mb | Typhoon |
| Feb 20, 18:00 | 25.0S 105.0E | 70 kt | 970 mb | Typhoon |
| Feb 21, 00:00 | 25.4S 104.0E | 65 kt | 974 mb | Typhoon |
| Feb 21, 06:00 | 25.7S 103.2E | 55 kt | 982 mb | Tropical storm |
| Feb 21, 12:00 | 26.4S 102.7E | 50 kt | 985 mb | Tropical storm |
| Feb 21, 18:00 | 27.2S 102.2E | 45 kt | 989 mb | Tropical storm |
| Feb 22, 00:00 | 28.2S 102.0E | 40 kt | 993 mb | Tropical storm |
| Feb 22, 06:00 | 29.6S 102.2E | 35 kt | 996 mb | Tropical storm |
| Feb 22, 12:00 | 30.8S 102.7E | 30 kt | 1000 mb | Tropical depression |
| Feb 22, 18:00 | 30.9S 102.5E | 20 kt | 998 mb | Tropical storm |
| Feb 23, 00:00 | 31.1S 102.5E | 20 kt | 999 mb | Tropical storm |
| Feb 23, 06:00 | 31.6S 102.6E | 20 kt | 1000 mb | Tropical storm |
Other South Indian storms of 2011
- Unnamed tropical stormSouth Indian · 2011
- Tropical Storm AnggrekSouth Indian · 2011
- Cyclone AbeleSouth Indian · 2011
- Unnamed tropical depressionSouth Indian · 2011
- Unnamed tropical depressionSouth Indian · 2011
- Tropical Storm VinceSouth Indian · 2011
- Cyclone BiancaSouth Indian · 2011
- Cyclone BingizaSouth Indian · 2011
- Unnamed tropical stormSouth Indian · 2011
- Cyclone CarlosSouth Indian · 2011
- Tropical Storm CheronoSouth Indian · 2011
- Unnamed tropical stormSouth Indian · 2011
- Unnamed tropical stormSouth Indian · 2011
- Tropical Storm ErrolSouth Indian · 2011
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.