| 2009 North Indian Ocean cyclone season | |
|---|---|
 Season summary map | |
| Seasonal boundaries | |
| First system formed | April 14, 2009 |
| Last system dissipated | December 16, 2009 |
| Strongest storm | |
| Name | Aila |
| • Maximum winds | 110 km/h (70 mph) (3-minute sustained) |
| • Lowest pressure | 968 hPa (mbar) |
| Seasonal statistics | |
| Depressions | 8 |
| Deep depressions | 6 |
| Cyclonic storms | 4 |
| Severe cyclonic storms | 1 |
| Total fatalities | 419 total |
| Total damage | $1.3 billion (2009 USD) |
| Related articles | |
The 2009 North Indian Ocean cyclone season was an event in the annual cycle of tropical cyclone formation. The North Indian Ocean cyclone season has no official bounds, but cyclones tend to form between April and December, with peaks in May and November. These dates conventionally delimit the period of each year when most tropical cyclones form in the northern Indian Ocean.
The scope of this article is limited to the Indian Ocean in the Northern Hemisphere, east of the Horn of Africa and west of the Malay Peninsula. There are two main seas in the North Indian Ocean — the Arabian Sea to the west of the Indian subcontinent, abbreviated ARB by the India Meteorological Department (IMD); and the Bay of Bengal to the east, abbreviated BOB by the IMD.
The official Regional Specialized Meteorological Centre in this basin is the India Meteorological Department (IMD), while the Joint Typhoon Warning Center releases unofficial advisories. The tropical cyclone scale for this basin is detailed on the right. On average, 4 to 6 storms form in this basin every season.[1]
- ^ "IMD Cyclone Warning Services: Tropical Cyclones". Archived from the original on 29 May 2009. Retrieved 15 April 2009.