Cyclone Billy (1999)
Cyclone Billy reached Category 1 in the South Indian between December 1, 1998 and December 7, 1998, with a lowest pressure of 965 mb, and made landfall.
Radar
Reflectivity now over Cyclone Billy. 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 Indian
- Dates
- December 1, 1998 to December 7, 1998
- Peak strength
- Category 1, 65 kt (75 mph)
- Lowest pressure
- 965 mb (28.50 inHg)
- Landfall
- Yes
- Accumulated cyclone energy
- 3.7
- Identifier
- SH051999
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 1, 12:00 | 13.2S 120.1E | 20 kt | Tropical storm | |
| Dec 1, 18:00 | 13.9S 120.1E | 25 kt | Tropical storm | |
| Dec 2, 00:00 | 14.9S 120.1E | 25 kt | 1001 mb | Tropical storm |
| Dec 2, 06:00 | 15.6S 120.0E | 25 kt | 996 mb | Tropical storm |
| Dec 2, 12:00 | 16.1S 119.7E | 25 kt | 991 mb | Tropical storm |
| Dec 2, 18:00 | 16.6S 119.2E | 30 kt | 986 mb | Tropical storm |
| Dec 3, 00:00 | 17.0S 118.7E | 35 kt | 985 mb | Tropical storm |
| Dec 3, 06:00 | 17.3S 118.1E | 40 kt | 985 mb | Tropical storm |
| Dec 3, 12:00 | 17.5S 117.7E | 45 kt | 981 mb | Tropical storm |
| Dec 3, 18:00 | 17.8S 117.3E | 55 kt | 976 mb | Tropical storm |
| Dec 4, 00:00 | 18.0S 116.9E | 65 kt | 966 mb | Tropical storm |
| Dec 4, 06:00 | 18.2S 116.6E | 65 kt | 968 mb | Tropical storm |
| Dec 4, 12:00 | 18.5S 116.2E | 65 kt | 970 mb | Tropical storm |
| Dec 4, 18:00 | 18.9S 115.8E | 60 kt | 975 mb | Tropical storm |
| Dec 5, 00:00 | 19.3S 115.5E | 60 kt | 980 mb | Tropical storm |
| Dec 5, 06:00 | 19.6S 115.3E | 50 kt | 985 mb | Tropical storm |
| Dec 5, 12:00 | 20.1S 115.1E | 45 kt | 990 mb | Tropical storm |
| Dec 5, 18:00 | 20.5S 114.9E | 45 kt | 995 mb | Tropical storm |
| Dec 6, 00:00 | 21.0S 114.9E | 40 kt | 998 mb | Tropical storm |
| Dec 6, 06:00 | 21.6S 115.0E | 35 kt | 1000 mb | Tropical storm |
| Dec 6, 12:00 | 22.5S 115.5E | 25 kt | Tropical storm | |
| Dec 6, 18:00 | 23.2S 115.8E | 25 kt | Tropical storm | |
| Dec 7, 00:00 | 23.9S 116.5E | 20 kt | Tropical storm | |
| Dec 7, 06:00 | 24.6S 117.7E | 20 kt | Tropical storm |
Other South Indian storms of 1999
- Unnamed tropical stormSouth Indian · 1999
- Unnamed tropical stormSouth Indian · 1999
- Tropical Storm ZeliaSouth Indian · 1999
- Cyclone AlisonSouth Indian · 1999
- Tropical Storm CathySouth Indian · 1999
- Unnamed tropical depressionSouth Indian · 1999
- Cyclone AldaSouth Indian · 1999
- Cyclone Birenda:DamienSouth Indian · 1999
- Tropical Storm ChikitaSouth Indian · 1999
- Unnamed tropical stormSouth Indian · 1999
- Unnamed tropical stormSouth Indian · 1999
- Unnamed tropical depressionSouth Indian · 1999
- Cyclone DavinaSouth Indian · 1999
- Unnamed tropical stormSouth Indian · 1999
- Unnamed tropical stormSouth Indian · 1999
- Cyclone VanceSouth Indian · 1999
- Cyclone ElaineSouth Indian · 1999
- Unnamed tropical depressionSouth Indian · 1999
- Cyclone Evrina:FredericSouth Indian · 1999
- Cyclone GwendaSouth Indian · 1999
- Tropical Storm HamishSouth Indian · 1999
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.