The 2011 Atlantic hurricane season was an event in the annual hurricane season in the north Atlantic Ocean. It was well above average, with 19 tropical storms forming. Even so, it was the first season on record in which the first eight storms failed to attain hurricane strength. The season officially began on June 1, 2011, and ended on November 30, 2011, dates that conventionally delimit the period of each year when most tropical cyclones develop in the Atlantic basin. The season's first storm, Tropical Storm Arlene did not form until June 28. The final storm to develop, Tropical Storm Sean, dissipated on November 11.

There were 19 named storms altogether during the season, including seven hurricanes of which three intensified into major hurricanes. The two most significant storms, in terms of loss of life and damage, were Hurricane Irene and Tropical Storm Lee. Hurricane Irene was a powerful and unusually large storm that made several landfalls along the East Coast of the United States after peaking with maximum sustained winds of . Tropical Storm Lee was a disorganized tropical cyclone that moved ashore into Louisiana before producing historic flooding in the Northeast United States as an extratropical cyclone.

This timeline documents tropical cyclone formations, strengthening, weakening, landfalls, extratropical transitions, and dissipations during the season. It includes information that was not released throughout the season, meaning that data from post-storm reviews by the National Hurricane Center, such as a storm that was not initially warned upon, has been included.

The time stamp for each event is first stated using Coordinated Universal Time (UTC), the 24-hour clock where 00:00 = midnight UTC. The NHC uses both UTC and the time zone where the center of the tropical cyclone is currently located. The time zones utilized (east to west) prior to 2020 were: Atlantic, Eastern, and Central. In this timeline, the respective area time is included in parentheses. Additionally, figures for maximum sustained winds and position estimates are rounded to the nearest 5 units (miles, or kilometers), following National Hurricane Center practice. Direct wind observations are rounded to the nearest whole number. Atmospheric pressures are listed to the nearest millibar and nearest hundredth of an inch of mercury. __TOC__

Timeline

June

June 1 The 2011 Atlantic hurricane season officially begins. June 28 1800 UTC (1:00 p.m. CDT) – Tropical Storm Arlene develops from an area of low pressure roughly east-southeast of Tampico, Mexico. June 30 1200 UTC (7:00 a.m. CDT) – Tropical Storm Arlene reaches its peak intensity with winds of 65 mph (100 km/h) and a minimum barometric pressure of 993 mbar (hPa; ). 1300 UTC (8:00 a.m. CDT) – Tropical Storm Arlene makes landfall near Cabo Rojo, Veracruz, with winds of .

July July 1 0000 UTC (7:00 p.m. CDT June 30) – Tropical Storm Arlene weakens to a tropical depression. 0600 UTC (1:00 a.m. CDT) – Tropical Depression Arlene dissipates over the high terrain of Mexico. July 17 1800 UTC (2:00 p.m. EDT) – Tropical Depression Two develops from an area of low pressure roughly north of Grand Bahama Island. July 18 0000 UTC (8:00 p.m. EDT July 17) – Tropical Depression Two intensifies into Tropical Storm Bret. 1800 UTC (2:00 p.m. EDT) – Tropical Storm Bret reaches its peak intensity with winds of and a minimum pressure of 995 mbar (hPa; ). July 20

0600 UTC (2:00 a.m. AST) – Tropical Depression Three develops from an area of low pressure roughly east of Bermuda. 1200 UTC (8:00 a.m. AST) - Tropical Depression Three intensifies into Tropical Storm Cindy. July 21 1800 UTC (2:00 p.m. AST) – Tropical Storm Cindy reaches its peak intensity with winds of and a minimum barometric pressure of 994 mbar (hPa; ). July 22 0000 UTC (8:00 p.m. AST July 21) – Tropical Storm Bret weakens to a tropical depression northwest of Bermuda. 1200 UTC (8:00 a.m. AST) – Tropical Depression Bret degenerates into a non-convective remnant area of low pressure roughly south-southwest of Cape Race, Newfoundland. July 23 0000 UTC (8:00 p.m. AST July 22) – Tropical Storm Cindy degenerates into a non-convective remnant low roughly southwest of the coast of southwestern Ireland. July 27 0600 UTC (1:00 a.m. CDT) – Tropical Depression Four develops from an area of low pressure roughly northeast of Cancún, Mexico. 1800 UTC (1:00 p.m. CDT) – Tropical Depression Four intensifies into Tropical Storm Don roughly north-northeast of Cancún, Mexico. July 29 0000 UTC (7:00 p.m. CDT July 28) – Tropical Storm Don reaches its peak intensity with winds of and a minimum pressure of 997 mbar (hPa; ) roughly east-southeast of Corpus Christi, Texas. July 30 0230 UTC (9:30 p.m. CDT July 29) – Tropical Storm Don weakens to a tropical depression with winds of as it makes landfall along the Padre Island National Seashore just northeast of Baffin Bay, Texas. 0600 UTC (1:00 a.m. CDT) – Tropical Depression Don degenerates into a remnant low over southeast Texas.

August August 2 0000 UTC (8:00 p.m. AST August 1) – Tropical Storm Emily develops from an area of low pressure roughly northwest of Martinique.

August 3 0600 UTC (2:00 a.m. AST) – Tropical Storm Emily reaches its peak intensity with winds of 50 mph (85 km) and a minimum barometric pressure of 1003 mbar (hPa; ). August 4 1800 UTC (2:00 p.m. EDT) – Tropical Storm Emily degenerates into an open tropical wave south of Haiti. August 6 1800 UTC (2:00 p.m. EDT) – The remnants of Tropical Storm Emily regenerate into Tropical Depression Emily. August 7 0000 UTC (8:00 p.m. EDT August 6) – Tropical Depression Emily regains tropical storm status north of Grand Bahama. 1200 UTC (8:00 a.m. EDT) – Tropical Storm Emily degenerates into a non-convective remnant area of low pressure. August 12 1800 UTC (2:00 p.m. AST) – Tropical Depression Six develops from an area of low pressure roughly north of Bermuda. August 13 0600 UTC (2:00 a.m. AST) – Tropical Depression Six intensifies into Tropical Storm Franklin roughly south-southeast of Halifax, Nova Scotia. 1200 UTC (8:00 a.m. AST) – Tropical Storm Franklin reaches its peak intensity with maximum sustained winds of and a minimum barometric pressure of 1004 mbar (hPa; ). 1800 UTC (2:00 p.m. AST) – Tropical Depression Seven develops from an area of low pressure roughly southeast of Bermuda. 1800 UTC (2:00 p.m. AST) – Tropical Storm Franklin transitions into an extratropical cyclone.

August 14 0600 UTC (2:00 a.m. AST) – Tropical Depression Seven intensifies into Tropical Storm Gert. August 15 1200 UTC (8:00 a.m. AST) – Tropical Storm Gert reaches its peak intensity with winds of and a minimum barometric pressure of 1000 mbar (hPa; ). August 16 1200 UTC (8:00 a.m. AST) – Tropical Storm Gert degenerates into a non-convective remnant area of low pressure. August 19 0000 UTC (8:00 p.m. EDT August 18) – Tropical Depression Eight develops from an area of low pressure roughly northeast of Cabo Gracias a Dios on the border of Nicaragua and Honduras. 1200 UTC (8:00 a.m. EDT) – Tropical Depression Eight intensifies into Tropical Storm Harvey. August 20 0600 UTC (2:00 a.m. EDT) – Tropical Storm Harvey reaches its peak intensity with a minimum barometric pressure of 994 mbar (hPa; ). 1730 UTC (12:30 p.m. CDT) – Tropical Storm Harvey reaches its peak intensity with winds of and simultaneously makes its first landfall near Dangriga, Belize. August 21 0000 UTC (8:00 p.m. AST August 20) – Tropical Storm Irene develops from an area of low pressure roughly east of Martinique. 0600 UTC (1:00 a.m. CDT) – Tropical Storm Harvey weakens to a tropical depression. 2300 UTC (7:00 p.m. AST August 20) – Tropical Storm Irene makes its first landfall on Saint Croix with winds of .

August 22 0000 UTC (7:00 p.m. CDT August 21) – Tropical Depression Harvey regains tropical storm status in the Bay of Campeche. 0200 UTC (9:00 p.m. CDT August 21) – Tropical Storm Harvey makes its second and final landfall near Punta Roca Partida, Mexico, with winds of . 0525 UTC (1:25 a.m. AST) – Tropical Storm Irene makes its second landfall near Punta Santiago, Puerto Rico, with winds of . 0600 UTC (1:00 a.m. CDT) – Tropical Storm Harvey weakens to a tropical depression. 0600 UTC (2:00 a.m. AST) – Tropical Storm Irene intensifies into a Category 1 hurricane on the Saffir–Simpson hurricane scale, becoming the first hurricane of the 2011 season. 1800 UTC (1:00 p.m. CDT) – Tropical Depression Harvey dissipates roughly southwest of Veracruz, Mexico. August 24 0600 UTC (2:00 a.m. AST) – Hurricane Irene intensifies into a Category 2 hurricane north of Haiti. 1200 UTC (8:00 a.m. EDT) – Hurricane Irene intensifies into a Category 3 hurricane, the first major hurricane of the 2011 season, and simultaneously reaches its peak intensity with winds of . 1600 UTC (12:00 p.m. EDT) – Hurricane Irene makes its third landfall on the Acklins and Crooked Islands, with winds of . August 25 0000 UTC (8:00 p.m. EDT August 24) – Hurricane Irene weakens to a Category 2 hurricane and simultaneously makes its fourth landfall on Long Island, Bahamas, with winds of . 0000 UTC (8:00 p.m. AST August 24) – Tropical Depression Ten develops from an area of low pressure roughly west-southwest of the Cape Verde Islands and simultaneously reaches its peak intensity with winds of and a minimum barometric pressure of 1006 mbar (hPa; ). 0900 UTC (5:00 a.m. EDT) – Hurricane Irene makes its fifth landfall on Eleuthera, with winds of . 1800 UTC (2:00 p.m. AST) – Hurricane Irene makes its sixth landfall on the Abaco Islands, with winds of . August 26 0600 UTC (2:00 a.m. EDT) – Hurricane Irene reaches its peak intensity with a minimum barometric pressure of 942 mbar (hPa; ). 1800 UTC (2:00 p.m. EDT) – Hurricane Irene weakens to a Category 1 hurricane.

August 27 0000 UTC (8:00 p.m. AST August 26) – Tropical Depression Ten degenerates into a non-convective remnant area of low pressure. 0600 UTC (2:00 a.m. AST) – Tropical Depression Eleven develops from an area of low pressure roughly south-southeast of Bermuda. 1200 UTC (8:00 a.m. EDT) – Hurricane Irene makes its seventh landfall near Cape Lookout, North Carolina, with winds of . 1200 UTC (8:00 a.m. AST) – Tropical Depression Eleven intensifies into Tropical Storm Jose. August 28 0935 UTC (5:35 a.m. EDT) – Hurricane Irene weakens to a tropical storm and simultaneously makes its eighth landfall on Brigantine Island, New Jersey, with winds of . 1200 UTC (8:00 a.m. AST) – Tropical Storm Jose reaches its peak intensity with winds of and a minimum barometric pressure of 1006 mbar (hPa; ). 1300 UTC (9:00 a.m. EDT) – Tropical Storm Irene makes its ninth and final landfall in Coney Island, Brooklyn, with winds of . August 29 0000 UTC (8:00 p.m. EDT August 28) – Tropical Storm Irene transitions into an extratropical cyclone near the Vermont–New Hampshire border. 0000 UTC (8:00 p.m. EDT August 28) – Tropical Storm Jose degenerates into a non-convective remnant area of low pressure roughly north-northwest of Bermuda. 0600 UTC (2:00 a.m. AST) – Tropical Depression Twelve develops from an area of low pressure roughly southwest of the Cape Verde Islands. August 30 0000 UTC (8:00 p.m AST August 29) – Tropical Depression Twelve intensifies into Tropical Storm Katia roughly southwest of the Cape Verde Islands.

September September 1 0000 UTC (8:00 p.m. EDT August 31) – A tropical depression develops from an area of low pressure roughly north of Bermuda. 0000 UTC (8:00 p.m. AST August 31) – Tropical Storm Katia intensifies into a Category 1 hurricane roughly east of the Leeward Islands. 1200 UTC (8:00 a.m. EDT) – The tropical depression intensifies into an unnamed tropical storm. September 2 0000 UTC (7:00 p.m. CDT September 1) – Tropical Depression Thirteen develops from an area of low pressure roughly southwest of the mouth of the Mississippi River.