Tropical cyclones in 2011 Last updated July 08, 2025
Tropical cyclones in 2011 Year summary map
First system 03 Formed January 2, 2011 Last system Benilde Dissipated January 4, 2012 Name Songda Lowest pressure 920 mbar (hPa ); 27.17 inHg Name Philippe Duration 14 days Total systems 130 Named systems 75 Total fatalities 3,686 total Total damage $30.57 billion (2011 USD ) Other years 2009 , 2010 , 2011 , 2012 , 2013
Satellite photos of the 21 tropical cyclones worldwide that reached at least Category 3 on the Saffir–Simpson scale during 2011 , from Wilma in January to Kenneth in November. Songda (third-to-last image in the first row) was the most intense, with a minimum central pressure of 920 hPa. During 2011, tropical cyclones formed within seven different tropical cyclone basins , located within various parts of the Atlantic, Pacific and Indian Oceans. The strongest tropical cyclone of the year was Typhoon Songda , with a minimum central pressure of 920 hPa (mbar ). The costliest tropical cyclone of the year was Hurricane Irene , which caused $14.2 billion worth of damage. The deadliest tropical cyclone of the year was Severe Tropical Storm Washi , which killed 2,546 people. During the year, a total of 130 tropical cyclones had formed this year to date. 75 tropical cyclones had been named by either a Regional Specialized Meteorological Center (RSMC) or a Tropical Cyclone Warning Center (TCWC). Thirty-nine of these named systems eventually intensified into hurricane-equivalent tropical cyclones.
The most active basin in the year was the Western Pacific , which documented 21 named storms. North Atlantic basin documented 19 named storms, continuing the consecutive third-most active season trends from the previous year, due to the 2010–12 La Niña event . Conversely, the Eastern Pacific basin featured slightly more activity than the previous season , with 11 named storms. The least active basin in the year was the North Indian Ocean basin which documented only 2 named storms, the lowest since the 1993 season . Activity across the Southern Hemisphere were almost evenly spread, with the South-West Indian Ocean basin recording 10 tropical cyclones, the Australian region recording 17 tropical cyclones, and the South Pacific basin also recording 10 tropical cyclones, respectively. Twenty-one Category 3 tropical cyclones formed in the year, including three Category 5 tropical cyclones . The accumulated cyclone energy (ACE) index for the 2011 (seven basins combined), as calculated by Colorado State University was 573.8 units.
Tropical cyclones are primarily monitored by a group of ten warning centers, which have been designated as a Regional Specialized Meteorological Centre (RSMC) or a Tropical Cyclone Warning Center (TCWC) by the World Meteorological Organization . These are the United States National Hurricane Center (NHC) and Central Pacific Hurricane Center , the Japan Meteorological Agency (JMA), the Indian Meteorological Department (IMD), Météo-France (MFR), Indonesia's Badan Meteorologi, Klimatologi, dan Geofisika , the Australian Bureau of Meteorology (BOM), Papua New Guinea's National Weather Service, the Fiji Meteorological Service (FMS) as well as New Zealand's MetService . Other notable warning centers include the Philippine Atmospheric, Geophysical, and Astronomical Services Administration (PAGASA), the United States Joint Typhoon Warning Center (JTWC), and the Brazilian Navy Hydrographic Center(BNHC) .
Global atmospheric and hydrological conditions The strong La Niña from the previous year continued into 2011, whereby it peaked in January. [ 1] Afterwards, it began weakening considerably, to the point where in May it was determined that a transition to neutral conditions took place. [ 2] By the end of Summer, this neutral state continued to persist, although there were still remnants of the La Niña evident. [ 3] Due to continued cooling of the Pacific, it was determined that the La Niña redeveloped, albeit in a weak state, which would then continue into the next year. [ 4]
Systems January Cyclone Yasi During January 2011, a total of 12 tropical cyclones, all of them, formed within the southern hemisphere. No tropical cyclone was observed in the northern hemisphere. Of the systems, 7 further intensified to become named. Out of the systems, Wilma was the most intense tropical cyclone, with a minimum barometric pressure of 935 mbar/hPa.
Tropical cyclones formed in January 2011 Storm name Dates active Max wind Pressure Areas affected DamageUSD ) Deaths Refs 03 January 2–3 55 (35) 996 Madagascar None None [ 5] Vania January 5–15 100 (65) 973 Vanuatu , Fiji , New Caledonia , New Zealand unknown unknown [ citation needed ] 04F January 5–7 185 (115) 1002 New Caledonia $25 million 3 direct, 1 indirect Vince January 10—15 75 (45) 986 None None None Zelia January 12—17 185 (115) 943 New Caledonia , Norfolk Island , New Zealand None None Wilma January 19–29 185 (115) 935 Samoan Islands , Tonga , New Zealand $22 million 3 [ 6] 07F January 20–22 65 (40) 996 New Caledonia None None Anthony January 22–31 95 (60) 989 Queensland Minor None [ citation needed ] Bianca January 23–30 175 (110) 949 Northern Territory , Western Australia Unknown 2 [ 7] Yasi January 26–February 3 205 (125) 929 Tuvalu , Fiji , Solomon Islands , Vanuatu , Papua New Guinea , Australia $3.6 billion 1 [ citation needed ] 04 January 30–31 45 (30) 998 Réunion None None 13U January 31 Not Specified Not Specified None None None
February Cyclone Atu 10 systems formed and 5 named storms during February.
March Cyclone Bune March was a relatively inactive month in which 11 systems formed, and only 3 received names.
Tropical cyclones formed in March 2011 Storm name Dates active Max wind Pressure Areas affected DamageUSD ) Deaths Refs 20U March 5 Not Specified Not Specified None None None 21U March 7–8 45 (30) 1004 None None None 12F March 7–9 45 (30) 1002 Vanuatu None None 22U March 10–15 Not Specified Not Specified None None None Cherono March 10–23 75 (45) 993 Rodrigues Island None None Arani March 14–16 85 (50) 989 Brazil None None Bune March 22 – 29 130 (80) 967 Fiji None None 25U March 26–April 6 55 (35) 994 None None None 08 March 29–31 45 (30) 1004 None None None 26U March 30–April 1 Not Specified 1006 None None None 27U March 30–April 1 Not Specified 1006 None None None
May Typhoon Songda May was a mostly inactive month in which only 4 tropical cyclones formed, in which 2 received names.
June Hurricane Adrian Tropical cyclones formed in June 2011 Storm name Dates active Max wind Pressure Areas affected DamageUSD ) Deaths Refs Adrian June 7–12 220 (140) 944 Southwestern Mexico None None Sarika (Dodong) June 8–11 75 (45) 996 Philippines , China $248 million 28 [ citation needed ] ARB 01 June 11–12 45 (30) 996 India None None TD June 14–15 Not specified 1004 China None None Haima (Egay) June 16–25 75 (45) 985 Philippines , China, Vietnam , Laos , Thailand $167 million 18 [ citation needed ] BOB 02 June 16–23 65 (40) 978 India None 6 [ citation needed ] Beatriz June 19–22 150 (90) 977 Southwestern and Western Mexico None 4 [ citation needed ] Meari (Falcon) June 20–27 110 (70) 970 Philippines , China, Japan, Korea $1.24 million 11 [ citation needed ] Arlene June 28–July 1 100 (65) 993 Central America , Mexico , Texas , Florida $223.4 million 22 [ citation needed ]
July Hurricane Dora Tropical cyclones formed in July 2011 Storm name Dates active Max wind Pressure Areas affected DamageUSD ) Deaths Refs Calvin July 7–10 130 (80) 984 None None None Goring July 8–10 45 (30) 1000 Taiwan , China None None Ma-on (Ineng) July 11–24 175 (110) 935 Northern Mariana Islands , Japan $50 million 5 [ citation needed ] Tokage (Hanna) July 13–15 65 (40) 1000 None None None TD July 16–17 Not specified 1000 China None None Bret July 17–22 110 (70) 995 Bahamas , Bermuda , East Coast of the United States None None Dora July 18–24 250 (155) 929 Southwestern Mexico, Western Mexico, Baja California Peninsula , Southwestern United States Minimal None [ citation needed ] Cindy July 20–22 110 (70) 994 Bermuda None None LAND 01 July 22–23 35 (25) 990 India None None Nock-ten (Juaning) July 24–31 95 (60) 985 Philippines , China, Vietnam , Laos , Thailand $126 million 128 [ citation needed ] Muifa (Kabayan) July 25–August 9 175 (110) 930 Micronesia , Caroline Islands , Philippines , Japan, China, Korea , Russia $480 million 22 [ citation needed ] Don July 27–30 85 (50) 997 Cuba , Yucatán Peninsula , Northeastern Mexico, Texas None None Lando July 31–August 2 Not specified 1002 Philippines None None Eugene July 31–August 6 220 (140) 942 None None None
August Typhoon Nanmadol Hurricane Katia August was the most active month of 2011, with 18 systems forming in the month.
Tropical cyclones formed in August 2011 Storm name Dates active Max wind Pressure Areas affected DamageUSD ) Deaths Refs Emily August 2–7 85 (50) 1003 Antilles , Florida , Bahamas $5 million 5 [ citation needed ] Merbok August 2–9 95 (60) 980 None None None TD August 2–4 55 (35) 1008 Japan None None 13W August 8–14 55 (35) 1004 None None None TD August 8–10 55 (35) 1008 None None None Franklin August 12–13 75 (45) 1004 Bermuda None None Gert August 13–16 100 (65) 1000 Bermuda None None Fernanda August 15–19 110 (70) 992 None None None Greg August 16–21 140 (85) 979 None None None Harvey August 19–22 100 (65) 994 Lesser Antilles , Hispaniola , Central America , Mexico Minimal 5 [ citation needed ] TD August 20–25 55 (35) 1004 None None None Irene August 21–28 195 (120) 942 Lesser Antilles , Greater Antilles , Turks and Caicos , Bahamas , East Coast of the United States , Vermont , Atlantic Canada $14.2 billion 58 [ citation needed ] Nanmadol (Mina) August 21–31 185 (115) 925 Philippines , Taiwan , China $1.49 billion 38 [ citation needed ] Talas August 23–September 5 95 (60) 970 Japan $600 million 82 [ citation needed ] Ten August 25–26 55 (35) 1006 None None None Jose August 26–29 75 (45) 1006 Bermuda None None Katia August 29–September 10 220 (140) 942 Lesser Antilles , East Coast of the United States , Canada, United Kingdom $157 million 4 [ citation needed ] Eight-E August 31–September 1 55 (35) 1002 Southwestern Mexico, Western Mexico None None
September Typhoon Nalgae Hurricane Hilary September was a below-average month, with only 16 tropical cyclones forming in that month.
Tropical cyclones formed in September 2011 Storm name Dates active Max wind Pressure Areas affected DamageUSD ) Deaths Refs Unnamed September 1–3 75 (45) 1002 None None None Lee September 2–5 95 (60) 986 Gulf Coast of the United States , Eastern United States $2.8 billion 18 [ citation needed ] Noru September 2–6 75 (45) 990 None None None Kulap (Nonoy) September 6–11 65 (40) 1000 Japan, Korea None None Maria September 6–16 130 (80) 983 Lesser Antilles , Bermuda , Newfoundland , Europe $1.3 million None [ citation needed ] Nate September 7–11 120 (75) 994 Mexico Minimal 5 [ citation needed ] Roke (Onyok) September 8–22 155 (100) 940 Japan, Russia, Alaska $1.2 billion 13 [ citation needed ] TD September 13–15 Not specified 1002 Taiwan None None Sonca September 14–20 130 (80) 970 None None None Ophelia September 20–October 3 220 (140) 940 Leeward Islands , Bermuda , Newfoundland Minimal None [ citation needed ] Hilary September 21–30 230 (145) 942 Southwestern Mexico Minimal None [ citation needed ] BOB 03 September 22–23 45 (30) 995 India Unknown 42 [ citation needed ] Nesat (Pedring) September 23–30 150 (90) 950 Philippines , China, Vietnam $2.12 billion 98 [ citation needed ] Haitang September 24–27 65 (40) 996 China, Vietnam , Laos $20 million 25 [ citation needed ] Philippe September 24–October 8 150 (90) 976 Cape Verde None None Nalgae (Quiel) September 26–October 5 175 (110) 935 Philippines , China, Vietnam $250 million 18 [ citation needed ]
November Hurricane Kenneth November was inactive with only 7 tropical cyclones forming, as well as Rolf, a system that formed in the Mediterranean sea.
Global effects There are a total of seven tropical cyclone basins that tropical cyclones typically form in this table, data from all these basins are added. [ 9]
Season name Areas affected Systems formed Named storms Hurricane-force DamageUSD ) Deaths Ref. North Atlantic Ocean [ a] Central America , Yucatan Peninsula , Southeastern United States , Gulf Coast of the United States , Lucayan Archipelago , Bermuda , East Coast of the United States , Greater Antilles , Northeastern Mexico , Lesser Antilles , Eastern United States , Atlantic Canada , Western Europe , Leeward Islands 20 19 7 $17.38 billion 96 (16) Eastern and Central Pacific Ocean [ a] Southwestern Mexico , Western Mexico , Baja California Peninsula , Southwestern United States , Central America 13 11 10 $204 million 49 Western Pacific Ocean [ b] Mariana Islands , Philippines , Japan, Micronesia , China, Vietnam , Laos , Thailand , Korea , Taiwan , Caroline Islands , Palau , Malaysia 39 21 10 $7.48 billion 3,111 North Indian Ocean [ c] Sri Lanka , Bangladesh , Myanmar , Oman , Yemen , India 10 2 1 $603.64 million 360 South-West Indian Ocean January – June [ d] [ e] Comoros , Madagascar , Rodrigues , Réunion 6 2 1 Unknown 34 July – December [ b] Madagascar 2 1 1 — — Australian region January – June [ d] Queensland , Northern Territory , Western Australia , Solomon Islands , West Timor 19 9 2 $3.61 billion 3 July – December [ b] Papua New Guinea , Northern Territory , Queensland 4 2 1 Unknown Unknown South Pacific Ocean January – June [ d] Fiji , Vanuatu , New Caledonia , New Zealand , Samoan Islands , Tuvalu , Vanuatu 13 6 4 $33 million 5 July – December [ b] Fiji , Niue , Cook Islands 2 — — — — South Atlantic Ocean Brazil 1 1 — Unknown — Mediterranean Sea Western Europe 1 1 — $1.25 billion 12 Worldwide (See above) 130 [ f] 75 37 $30.57 billion 3,670 (16)
1 2 The wind speeds for this tropical cyclone/basin are based on the Saffir Simpson Scale which uses 1-minute sustained winds. 1 2 3 4 Only systems that formed either before or on December 31, 2011 are counted in the seasonal totals. ↑ The wind speeds for this tropical cyclone/basin are based on the IMD Scale which uses 3-minute sustained winds. 1 2 3 Only systems that formed either on or after January 1, 2011 are counted in the seasonal totals. ↑ The wind speeds for this tropical cyclone are based on Météo-France , which uses wind gusts. ↑ The sum of the number of systems in each basin will not equal the number shown as the total. This is because when systems move between basins, it creates a discrepancy in the actual number of systems. Notes 1 The "strength" of a tropical cyclone is measured by the minimum barometric pressure, not wind speed. Most meteorological organizations rate the intensity of a storm by this figure, so the lower the minimum pressure of the storm, the more intense or "stronger" it is considered to be. 2 Only systems that formed either on or after January 1, 2011 are counted in the seasonal totals. 3 Only systems that formed either before or on December 31, 2011 are counted in the seasonal totals. 4 The wind speeds for this tropical cyclone/basin are based on the IMD Scale which uses 3-minute sustained winds. 5 The wind speeds for this tropical cyclone/basin are based on the Saffir Simpson Scale which uses 1-minute sustained winds. 6 The wind speeds for this tropical cyclone are based on Météo-France which uses wind gusts.
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