2011 Pacific typhoon season

2011 Pacific typhoon season

Season summary map
First storm formed	April 1, 2011
Last storm dissipated	January 1, 2012
Strongest storm	Songda – 920 hPa (mbar), 195 km/h (120 mph) (10-minute sustained)
Tropical depressions	39
Total storms	21
Typhoons	8
Super typhoons	4 (Unofficial)
Total fatalities	3,111 total
Total damage	$7.18 billion (2011 USD)
Pacific typhoon seasons 2009, 2010, 2011, 2012, 2013
Related article
Timeline of the 2011 Pacific typhoon season

The 2011 Pacific typhoon season was an event in which tropical cyclones formed in the Western Pacific Ocean. The season ran throughout 2011 with most tropical cycle agency storming between May and November. The scope of this article is limited to the Pacific Ocean to the north of the equator between 100th meridian east and the 180th meridian.

Within the Northwestern Pacific Ocean, there are two separate agencies who assign names to tropical cyclones. This can often result in a cyclone having two names. The Japan Meteorological Agency named a tropical cyclone if it was judged to have 10-minute sustained wind speeds of at least 65 km/h (40 mph) anywhere in the basin.

While the Philippine Atmospheric, Geophysical and Astronomical Services Administration assigned names to tropical cyclones which moved into or form as a tropical depression in their area of responsibility between 135°E and 115°E and between 5°N and 25°N even if the cyclone has had a name assigned to it by the Japan Meteorological Agency. Tropical depressions that were monitored by the United States' Joint Typhoon Warning Center were given a number with a "W" suffix. On average, 27 storms form in this basin every year.