2009 North Indian Ocean cyclone season

2009 North Indian Ocean cyclone season
Season summary map
Seasonal boundaries
First system formedApril 14, 2009
Last system dissipatedDecember 16, 2009
Strongest storm
NameAila
 • Maximum winds110 km/h (70 mph)
(3-minute sustained)
 • Lowest pressure968 hPa (mbar)
Seasonal statistics
Depressions8
Deep depressions6
Cyclonic storms4
Severe cyclonic storms1
Total fatalities419 total
Total damage$1.3 billion (2009 USD)
Related articles
North Indian Ocean tropical cyclone seasons
2007, 2008, 2009, 2010, 2011

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]

  1. ^ "IMD Cyclone Warning Services: Tropical Cyclones". Archived from the original on 29 May 2009. Retrieved 15 April 2009.