Timeline of the 2011 Atlantic hurricane season
Encyclopedia
The 2011 Atlantic hurricane season
was an above-average Atlantic hurricane season
, with a total of nineteen named storms throughout the Gulf of Mexico
, Caribbean
, and Atlantic basin. The season officially began on June 1 and ended on November 30, with the season's first storm, Tropical Storm Arlene
developing on June 29.
The season has had twenty tropical depressions, of which nineteen have intensified into tropical storms, seven have become hurricanes, and out of those seven, three have become major hurricanes. The increased activity so far this season can be linked to La Niña
, which provides a favorable environment for tropical systems to develop, but the amount of dry air around the basin became fault to why there has been only six hurricanes. The most significant system of the season was Hurricane Irene
, the first hurricane to make landfall in the United States
since Hurricane Ike
in the 2008 season
. The storm caused significant flooding in the Northeast United States, an area already plagued with record rainfall totals. The storm killed at least 56 people, and has caused over $10.1 billion in damage. Another landfalling tropical cyclone the season had was Tropical Storm Lee
, which made landfall on the coast of Louisiana
, also causing heavy rainfall in the Northeast. For this reason, the storm has killed at least 21, spawned more than 20 tornadoes and caused over $1 billion in damage.
This timeline includes information that was not operationally released, meaning that information from post-storm reviews by the National Hurricane Center
, such as a storm that was not operationally warned upon, has been included. This timeline documents tropical cyclone formations, strengthening, weakening, landfalls, extratropical transitions, and dissipations during the season.
June 29
June 30
July 17
July 18
July 20
July 21
July 22
July 23
July 27
July 29
July 30
August 4
August 6
August 7
August 12
August 13
August 14
August 15
August 16
August 19
August 20
August 21
August 22
August 23
August 24
August 25
August 26
August 27
August 28
August 29
August 30
September 2
September 3
September 4
September 5
September 6
September 7
September 8
September 9
September 10
September 11
September 12
September 15
September 16
September 21
September 24
September 25
September 27
September 28
September 29
September 30
October 2
October 3
October 6
October 7
October 8
October 23
October 24
October 25
October 26
October 27
October 28
November 12
November 30
2011 Atlantic hurricane season
The 2011 Atlantic hurricane season is tied for the third most active season on record with 1887, 1995 and 2010. It began on June 1, 2011, and ended on November 30, 2011, however these dates conventionally delimit the period of each year when most tropical cyclones develop in the Atlantic basin...
was an above-average Atlantic hurricane season
Atlantic hurricane season
The Atlantic hurricane season is the period in a year when hurricanes usually form in the Atlantic Ocean. Tropical cyclones in the North Atlantic are called hurricanes, tropical storms, or tropical depressions. In addition, there have been several storms over the years that have not been fully...
, with a total of nineteen named storms throughout the Gulf of Mexico
Gulf of Mexico
The Gulf of Mexico is a partially landlocked ocean basin largely surrounded by the North American continent and the island of Cuba. It is bounded on the northeast, north and northwest by the Gulf Coast of the United States, on the southwest and south by Mexico, and on the southeast by Cuba. In...
, Caribbean
Caribbean
The Caribbean is a crescent-shaped group of islands more than 2,000 miles long separating the Gulf of Mexico and the Caribbean Sea, to the west and south, from the Atlantic Ocean, to the east and north...
, and Atlantic basin. The season officially began on June 1 and ended on November 30, with the season's first storm, Tropical Storm Arlene
Tropical Storm Arlene (2011)
Tropical Storm Arlene was a strong tropical storm that affected much of eastern Mexico, as well as the first tropical cyclone to form during the 2011 Atlantic hurricane season. Originating from an Atlantic tropical wave, the precursor disturbance crossed the Yucatán Peninsula before emerging into...
developing on June 29.
The season has had twenty tropical depressions, of which nineteen have intensified into tropical storms, seven have become hurricanes, and out of those seven, three have become major hurricanes. The increased activity so far this season can be linked to La Niña
La Niña
La Niña is a coupled ocean-atmosphere phenomenon that is the counterpart of El Niño as part of the broader El Niño-Southern Oscillation climate pattern. During a period of La Niña, the sea surface temperature across the equatorial Eastern Central Pacific Ocean will be lower than normal by 3–5 °C...
, which provides a favorable environment for tropical systems to develop, but the amount of dry air around the basin became fault to why there has been only six hurricanes. The most significant system of the season was Hurricane Irene
Hurricane Irene (2011)
Hurricane Irene was a large and powerful Atlantic hurricane that left extensive flood and wind damage along its path through the Caribbean, the United States East Coast and as far north as Atlantic Canada in 2011...
, the first hurricane to make landfall in the United States
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...
since Hurricane Ike
Hurricane Ike
Hurricane Ike was the second-costliest hurricane ever to make landfall in the United States, the costliest hurricane ever to impact Cuba and the second most active hurricane to reach the Canadian mainland in the Great Lakes Region after Hurricane Hazel in 1954...
in the 2008 season
2008 Atlantic hurricane season
The 2008 Atlantic hurricane season was a very active hurricane season with sixteen named storms formed, including eight that became hurricanes and five that became major hurricanes. The season officially started on June 1 and ended on November 30. These dates conventionally delimit the period of...
. The storm caused significant flooding in the Northeast United States, an area already plagued with record rainfall totals. The storm killed at least 56 people, and has caused over $10.1 billion in damage. Another landfalling tropical cyclone the season had was Tropical Storm Lee
Tropical Storm Lee (2011)
Tropical Storm Lee was the twelfth named storm and thirteenth system overall of the 2011 Atlantic hurricane season, developing from a broad tropical disturbance over the Gulf on September 1. It was designated as Tropical Storm Lee the next day...
, which made landfall on the coast of Louisiana
Louisiana
Louisiana is a state located in the southern region of the United States of America. Its capital is Baton Rouge and largest city is New Orleans. Louisiana is the only state in the U.S. with political subdivisions termed parishes, which are local governments equivalent to counties...
, also causing heavy rainfall in the Northeast. For this reason, the storm has killed at least 21, spawned more than 20 tornadoes and caused over $1 billion in damage.
This timeline includes information that was not operationally released, meaning that information from post-storm reviews by the National Hurricane Center
National Hurricane Center
The National Hurricane Center , located at Florida International University in Miami, Florida, is the division of the National Weather Service responsible for tracking and predicting weather systems within the tropics between the Prime Meridian and the 140th meridian west poleward to the 30th...
, such as a storm that was not operationally warned upon, has been included. This timeline documents tropical cyclone formations, strengthening, weakening, landfalls, extratropical transitions, and dissipations during the season.
June
June 1- The 2011 Atlantic hurricane season officially begins.
June 29
- 0000 UTC (7 p.m. CDT June 28) – Tropical Storm Arlene, the first storm of the season, forms about 280 miMileA mile is a unit of length, most commonly 5,280 feet . The mile of 5,280 feet is sometimes called the statute mile or land mile to distinguish it from the nautical mile...
(450 kmKMKM, Km, or km may stand for:*Kilometre *Kernel methods*Kettle Moraine High School*Khmer language *Kuomintang , a centre-right political party in the Republic of China on Taiwan...
) south-southeast of Tampico, Mexico.
June 30
- 0900 UTC (4 a.m. CDT) – Tropical Storm Arlene makes landfall near Cabo RojoCabo Rojo (Mexico)Cabo Rojo is a barrier of quartzite sand deposited adjacent to the coast of the Mexican state of Veracruz, about south of the city of Tampico, Tamaulipas. It encloses the brackish lagoon called Laguna de Tamiahua...
, VeracruzVeracruzVeracruz, formally Veracruz de Ignacio de la Llave officially Estado Libre y Soberano de Veracruz de Ignacio de la Llave , is one of the 31 states that, along with the Federal District, comprise the 32 federative entities of Mexico. It is divided in 212 municipalities and its capital city is...
with 65 mphMPHMPH is a three-letter acronym that refers to miles per hour, a measurement of speedMPH may also refer to:* Make Poverty History, a campaign supported by Bob Geldof to end poverty in Africa...
(100 km/h) winds.
July
July 1- 0000 UTC (7 p.m. CDT June 30) – Tropical Storm Arlene weakens to a tropical depression.
- 0300 UTC (10 p.m. CDT June 30) – Tropical Depression Arlene dissipates over the high terrain of MexicoMexicoThe United Mexican States , commonly known as Mexico , is a federal constitutional republic in North America. It is bordered on the north by the United States; on the south and west by the Pacific Ocean; on the southeast by Guatemala, Belize, and the Caribbean Sea; and on the east by the Gulf of...
.
July 17
- 2100 UTC (5 p.m. EDTEastern Time ZoneThe Eastern Time Zone of the United States and Canada is a time zone that falls mostly along the east coast of North America. Its UTC time offset is −5 hrs during standard time and −4 hrs during daylight saving time...
) – Tropical Depression Two forms about 100 miles (165 km) northwest of Great Abaco Island.
July 18
- 0000 UTC (8 p.m. EDT July 17) – Tropical Depression Two strengthens into Tropical Storm Bret.
July 20
- 0600 UTC (2 a.m. AST) – Tropical Depression Three forms from an area of low pressure roughly 305 miles (490.8 km) east of BermudaBermudaBermuda is a British overseas territory in the North Atlantic Ocean. Located off the east coast of the United States, its nearest landmass is Cape Hatteras, North Carolina, about to the west-northwest. It is about south of Halifax, Nova Scotia, Canada, and northeast of Miami, Florida...
. - 1200 UTC (8 a.m. AST) - Tropical Depression Three strengthens into Tropical Storm Cindy.
July 21
- 1800 UTC (2 p.m. AST) – Tropical Storm Cindy attains its peak intensity with maximum sustained winds of 70 mph (110 km/h) and a minimum barometric pressure of 994 mbarBar (unit)The bar is a unit of pressure equal to 100 kilopascals, and roughly equal to the atmospheric pressure on Earth at sea level. Other units derived from the bar are the megabar , kilobar , decibar , centibar , and millibar...
(29.4 inHg).
July 22
- 0300 UTC (11 p.m. AST July 21) – Tropical Storm Bret weakens to a tropical depression.
- 1500 UTC (11 a.m. AST) – Tropical Depression Bret degenerates into a remnant low.
July 23
- 0000 UTC (8 p.m. AST) – Tropical Storm Cindy degenerates into a remnant low.
July 27
- 0600 UTC (1 a.m. CDT) – Tropical Depression Four develops about 58 miles (93.3 km) northeast of CancúnCancúnCancún is a city of international tourism development certified by the UNWTO . Located on the northeast coast of Quintana Roo in southern Mexico, more than 1,700 km from Mexico City, the Project began operations in 1974 as Integrally Planned Center, a pioneer of FONATUR Cancún is a city of...
, MexicoMexicoThe United Mexican States , commonly known as Mexico , is a federal constitutional republic in North America. It is bordered on the north by the United States; on the south and west by the Pacific Ocean; on the southeast by Guatemala, Belize, and the Caribbean Sea; and on the east by the Gulf of...
. - 1800 UTC (1 p.m. CDT) – Tropical Depression Four strengthens into Tropical Storm DonTropical Storm Don (2011)Tropical Storm Don was the fourth named storm of the 2011 Atlantic hurricane season and the first tropical cyclone to make landfall in the United States during the 2011 season...
.
July 29
- 0000 UTC (7 p.m. CDT July 28) – Tropical Storm Don attains its peak intensity with maximum sustained winds of 50 mph (85 km/h) and a minimum pressure of 997 mbar (29.4 inHg).
July 30
- 0230 UTC (10:30 p.m. CDT July 28) – Tropical Storm Don weakens to a tropical depression. Simultaneously, Don made landfall near Baffin Bay, TexasTexasTexas is the second largest U.S. state by both area and population, and the largest state by area in the contiguous United States.The name, based on the Caddo word "Tejas" meaning "friends" or "allies", was applied by the Spanish to the Caddo themselves and to the region of their settlement in...
with winds of 35 mph (55 km/h). - 0600 UTC (1 a.m. CDT) – Tropical Depression Don degenerates into a remnant low over Texas.
August
August 1- 2330 UTC (7:30 p.m. AST) – Tropical Storm Emily forms about 50 miles (85 km) west-southwest of DominicaDominicaDominica , officially the Commonwealth of Dominica, is an island nation in the Lesser Antilles region of the Caribbean Sea, south-southeast of Guadeloupe and northwest of Martinique. Its size is and the highest point in the country is Morne Diablotins, which has an elevation of . The Commonwealth...
.
August 4
- 2100 UTC (5 p.m. AST) – Tropical Storm Emily degenerates into a remnant low.
August 6
- 2100 UTC (5 p.m. EDT) – Tropical Depression Emily regenerates about 70 miles (115 km) west-northwest of Great Abaco Island.
August 7
- 2100 UTC (5 p.m. EDT) – Tropical Depression Emily dissipates.
August 12
- 1800 UTC (2 p.m. AST) – Tropical Depression Six forms about 230 miles (370 km) north of BermudaBermudaBermuda is a British overseas territory in the North Atlantic Ocean. Located off the east coast of the United States, its nearest landmass is Cape Hatteras, North Carolina, about to the west-northwest. It is about south of Halifax, Nova Scotia, Canada, and northeast of Miami, Florida...
.
August 13
- 0600 UTC (2 a.m. AST) – Tropical Depression Six strengthens into Tropical Storm Franklin.
- 1200 UTC (8 a.m. AST) – Tropical Storm Franklin attained its peak intensity with maximum sustained winds of 45 mph (75 km/h) and a minimum pressure of 1004 mbar (hPa; 29.65 inHg).
- 1800 UTC (2 p.m. AST) – Tropical Depression Seven forms about 425 miles (684 km) southeast of Bermuda.
- 1800 UTC (2 p.m. AST) – Tropical Storm Franklin transitions into an extratropical low.
August 14
- 0600 UTC (2 a.m. AST) – Tropical Depression Seven strengthens into Tropical Storm Gert.
August 15
- 1200 UTC (8 a.m. AST) – Tropical Storm Gert attained its peak intensity with maximum sustained winds of 65 mph (100 km/h) and a minimum pressure of 1000 mbar (29.5 inHg).
August 16
- 1200 UTC (8 a.m. EDT) – Tropical Storm Gert degenerates into an extratropical low.
August 19
- 0300 UTC (11 p.m. EDT August 18) – Tropical Depression Eight forms 80 miles (125 km) east-northeast of Cape Gracias a Dios, HondurasHondurasHonduras is a republic in Central America. It was previously known as Spanish Honduras to differentiate it from British Honduras, which became the modern-day state of Belize...
. - 1800 UTC (2 p.m. EDT) – Tropical Depression Eight strengthens into Tropical Storm Harvey.
August 20
- 1800 UTC (1 p.m. CDT) – Tropical Storm Harvey makes landfall near DangrigaDangrigaDangriga, formerly known as Stann Creek Town, is a town in southern Belize, located on the Caribbean coast at the mouth of Stann Creek. It is the capital of Belize's Stann Creek District and also the largest town in southern Belize...
, BelizeBelizeBelize is a constitutional monarchy and the northernmost country in Central America. Belize has a diverse society, comprising many cultures and languages. Even though Kriol and Spanish are spoken among the population, Belize is the only country in Central America where English is the official...
. - 2300 UTC (7 p.m. AST) – Tropical Storm Irene forms about 190 miles (305 km) east of DominicaDominicaDominica , officially the Commonwealth of Dominica, is an island nation in the Lesser Antilles region of the Caribbean Sea, south-southeast of Guadeloupe and northwest of Martinique. Its size is and the highest point in the country is Morne Diablotins, which has an elevation of . The Commonwealth...
.
August 21
- 0600 UTC (1 a.m. CDT) – Tropical Storm Harvey weakens to a tropical depression.
August 22
- 0530 UTC (1:30 a.m. AST) – Tropical Storm Irene makes landfall near Punta Santiago, Puerto RicoPuerto RicoPuerto Rico , officially the Commonwealth of Puerto Rico , is an unincorporated territory of the United States, located in the northeastern Caribbean, east of the Dominican Republic and west of both the United States Virgin Islands and the British Virgin Islands.Puerto Rico comprises an...
. - 0900 UTC (5 a.m. AST) – Tropical Storm Irene strengthens into a Category 1 hurricane.
- 1500 UTC (10 a.m. CDT) – Tropical Depression Harvey dissipates.
August 23
- 0000 UTC (8 p.m. AST August 22) – Hurricane Irene strengthens into a Category 2 hurricane.
- 2100 UTC (5 p.m. AST) – Hurricane Irene weakens back to a Category 1 hurricane.
August 24
- 0600 UTC (2 a.m. AST) – Hurricane Irene restrengthens into a Category 2 hurricane.
- 1200 UTC (8 a.m. AST) – Hurricane Irene strengthens into a Category 3 hurricane.
August 25
- 0900 UTC (5 a.m. AST) – Tropical Depression Ten forms about 435 miles (700.1 km) west-southwest of the southernmost Cape Verde Islands.
August 26
- 0900 UTC (5 a.m. EDT) – Hurricane Irene weakens back to a Category 2 hurricane.
August 27
- 0300 UTC (11 p.m. AST August 26) – Tropical Depression Ten dissipates 645 miles (1,040 km) west of the southernmost Cape Verde Islands.
- 0700 UTC (3 a.m. EDT) – Hurricane Irene weakens back to a Category 1 hurricane.
- 1130 UTC (7:30 a.m. EDT) – Hurricane Irene makes its first USUnited StatesThe United States of America is a federal constitutional republic comprising fifty states and a federal district...
landfall near Cape LookoutCape Lookout (North Carolina)This article is about the Cape Lookout in North Carolina. See Cape Lookout for other places with a similar name. Cape Lookout is southern point of the Core Banks, one of the natural barrier islands on the Atlantic coast of North Carolina, USA. delimits Onslow Bay to the west from Raleigh Bay to...
, North CarolinaNorth CarolinaNorth Carolina is a state located in the southeastern United States. The state borders South Carolina and Georgia to the south, Tennessee to the west and Virginia to the north. North Carolina contains 100 counties. Its capital is Raleigh, and its largest city is Charlotte...
with winds of 85 mph (140 km/h).
August 28
- 0935 UTC (5:35 a.m. EDT) – Hurricane Irene makes landfall near Little Egg Harbor Inlet, New JerseyNew JerseyNew Jersey is a state in the Northeastern and Middle Atlantic regions of the United States. , its population was 8,791,894. It is bordered on the north and east by the state of New York, on the southeast and south by the Atlantic Ocean, on the west by Pennsylvania and on the southwest by Delaware...
with winds of 75 mph (120 km/h). - 1200 UTC (8 a.m. EDT) – Tropical Storm Jose forms 115 miles (185 km) south-southwest of BermudaBermudaBermuda is a British overseas territory in the North Atlantic Ocean. Located off the east coast of the United States, its nearest landmass is Cape Hatteras, North Carolina, about to the west-northwest. It is about south of Halifax, Nova Scotia, Canada, and northeast of Miami, Florida...
. - 0300 UTC (11 p.m EDT) – Tropical Storm Irene transitions into an extratropical storm.
August 29
- 0500 UTC (1 a.m. AST) – Tropical Depression Twelve forms 395 miles (635 km) south-southwest of Cape VerdeCape VerdeThe Republic of Cape Verde is an island country, spanning an archipelago of 10 islands located in the central Atlantic Ocean, 570 kilometres off the coast of Western Africa...
. - 1700 UTC (11 a.m EDT) – Tropical Storm Jose dissipates.
August 30
- 0600 UTC (2 a.m AST) – Tropical Depression Twelve strengthens into Tropical Storm Katia.
September
September 1- 0300 UTC (11 p.m. EDT August 31) – Tropical Storm Katia strengthens into a Category 1 hurricane.
- 2100 UTC (5 p.m. EDT) – Hurricane Katia weakens to a tropical storm.
September 2
- 0000 UTC (7 p.m. CDT September 1) – Tropical Depression Thirteen forms about 225 miles (362.1 km) southwest of the mouth of the Mississippi River.
- 1500 UTC (11 a.m. EDT) – Tropical Storm Katia re-strengthens into a Category 1 hurricane.
- 1800 UTC (1 p.m. CDT) – Tropical Depression Thirteen strengthens into Tropical Storm Lee.
September 3
- 2100 UTC (5 p.m. EDT) – Hurricane Katia weakens to a tropical storm.
September 4
- 0900 UTC (4 a.m. CDT) – Tropical Storm Lee makes landfall southwest of Intracoastal City, LouisianaIntracoastal City, LouisianaIntracoastal City is an unincorporated community in Vermilion Parish, Louisiana, United States. It is situated on the west bank of the Vermilion River at its junction with the Gulf Intracoastal Waterway and has various port facilities and some permanent residents.Intracoastal City is approximately...
with 45 mph (75 km/h) winds. - 1100 UTC (7 a.m. AST) – Tropical Storm Katia re-strengthens into a Category 1 hurricane.
- 1500 UTC (11 a.m. EDT) – Hurricane Katia strengthens into a Category 2 hurricane.
September 5
- 0300 UTC (10 p.m. CDT September 4) – Tropical Storm Lee weakens into a tropical depression.
- 0900 UTC (4 a.m. CDT) – Tropical Depression Lee transitions into an extratropical cyclone as it merged with a frontal zone while centered over Louisiana.
- 2100 UTC (5 p.m. AST) – Hurricane Katia strengthens into a Category 3 hurricane.
September 6
- 0300 UTC (11 p.m. AST September 5) – Hurricane Katia strengthens into a Category 4 hurricane.
- 0900 UTC (2 a.m. AST) – Hurricane Katia weakens to a Category 3 hurricane.
- 2100 UTC (5 p.m. AST) – Hurricane Katia weakens to a Category 2 hurricane.
- 2100 UTC (5 p.m. AST) – Tropical Depression Fourteen forms about 920 miles (1,480.6 km) west-southwest of the Cape Verde Islands.
September 7
- 0900 UTC (5 a.m. AST) – Hurricane Katia weakens to a Category 1 hurricane.
- 1500 UTC (11 a.m. AST) – Tropical Depression Fourteen strengthens into Tropical Storm Maria.
- 1800 UTC (1 p.m. CDT) – Tropical Storm Nate forms about 160 miles (257.5 km) north of VillahermosaVillahermosaLike most of the Tabasco, Villahermosa has a tropical climate. The city specifically features a tropical monsoon climate. Temperatures during spring and summer seasons reach upwards of 40°C , with humidity levels hovering around 30% during the same period...
, TabascoTabascoTabasco officially Estado Libre y Soberano de Tabasco is one of the 31 states which, with the Federal District, comprise the 32 Federal Entities of Mexico. It is divided in 17 municipalities and its capital city is Villahermosa....
, Mexico.
September 8
- 1800 UTC (1 p.m. CDT) – Tropical Storm Nate strengthens into a Category 1 hurricane.
September 9
- 0000 UTC (7 p.m. CDT September 8) – Hurricane NateHurricane Nate (2011)Hurricane Nate was an Atlantic hurricane that made landfall on the Gulf Coast of Mexico in early September. The sixteenth named storm and fourth hurricane of the 2011 Atlantic hurricane season, Hurricane Nate formed in the Bay of Campeche on September 7 and initially moved erratically...
attained its peak intensity with winds of 75 mph (120 km/h) and a minimum pressure of 994 mbar (hPa; 29.35 inHg). - 0600 UTC (1 a.m. CDT) – Hurricane Nate weakens to a tropical storm.
September 10
- 1500 UTC (11 a.m. AST) – Hurricane Katia becomes post-tropical.
September 11
- 1600 UTC (11 a.m. CDT) – Tropical Storm Nate made landfall near Tecolutla, VeracruzTecolutla, VeracruzTecolutla is a town and municipality on the eastern coast of the state of Veracruz in Mexico. It is the closest beach to Mexico City and much of its economy is based on attracting people from this city, as it is only a four or five-hour drive. It is also the northern end of a tourist corridor...
with winds of 45 mph (75 km/h).
September 12
- 0600 UTC (1 a.m. CDT) – Tropical Storm Nate degenerates into a remnant low.
September 15
- 2100 UTC (5 p.m. AST) – Tropical Storm Maria strengthens into a Category 1 hurricane.
September 16
- 1830 UTC (2:30 p.m. AST) – Hurricane Maria makes landfall near Cape PineCape PineThe Headland of Cape Pine is the point of land marking the boundary of Trepassey Bay on the Avalon Peninsula of the island of Newfoundland in the Canadian province of Newfoundland and Labrador....
, NewfoundlandNewfoundland and LabradorNewfoundland and Labrador is the easternmost province of Canada. Situated in the country's Atlantic region, it incorporates the island of Newfoundland and mainland Labrador with a combined area of . As of April 2011, the province's estimated population is 508,400...
with winds of 75 mph (120 km/h). - 2100 UTC (5 p.m. AST) – Hurricane Maria becomes post-tropical.
September 21
- 0300 UTC (11 p.m. EDT September 20) – Tropical Storm Ophelia forms about 1585 miles (2555 km) east-southeast of the Leeward IslandsLeeward IslandsThe Leeward Islands are a group of islands in the West Indies. They are the northern islands of the Lesser Antilles chain. As a group they start east of Puerto Rico and reach southward to Dominica. They are situated where the northeastern Caribbean Sea meets the western Atlantic Ocean...
.
September 24
- 0900 UTC (5 a.m. AST September 24) – Tropical Depression Seventeen forms about forms about 290 mi (465 km) south of the southernmost Cape Verde Islands.
- 2100 UTC (5 p.m. AST) – Tropical Depression Seventeen strengthens into Tropical Storm Philippe.
September 25
- 2100 UTC (5 p.m. AST) – Tropical Storm Ophelia degenerates into a remnant low.
September 27
- 2100 UTC (5 p.m. AST) – Remnants of Ophelia regenerate into a tropical depression about 175 miles (285 km) east-southeast of the northern Leeward Islands.
September 28
- 1500 UTC (11 a.m. AST) – Tropical Depression Ophelia strengthens into a tropical storm.
September 29
- 2100 UTC (5 p.m. AST) – Tropical Storm Ophelia strengthens into a Category 1 hurricane.
September 30
- 0900 UTC (5 a.m. AST) – Hurricane Ophelia strengthens into a Category 2 hurricane.
- 1500 UTC (11 a.m. AST) – Hurricane Ophelia strengthens into a Category 3 hurricane.
October
October 1- 0000 UTC (5 p.m. AST October 1) – Hurricane Ophelia strengthens into a Category 4 hurricane.
October 2
- 0900 UTC (5 a.m. AST) – Hurricane Ophelia weakens into a Category 3 hurricane.
- 1500 UTC (11 a.m. AST) – Hurricane Ophelia weakens weakens into a Category 2 hurricane.
October 3
- 0000 UTC (8 p.m. AST October 2) – Hurricane Ophelia weakens weakens into a Category 1 hurricane.
- 0900 UTC (5 a.m. AST) – Hurricane Ophelia weakens weakens into a tropical storm.
- 1500 UTC (11 a.m. AST) – Tropical Storm Ophelia becomes post-tropical.
October 6
- 1500 UTC (11 a.m. AST) – Tropical Storm Philippe strengthens into a Category 1 hurricane.
October 7
- 2100 UTC (5:00 p.m. AST) – Hurricane Philippe weakens into a tropical storm.
October 8
- 0300 UTC (11:00 p.m. AST) – Tropical Storm Philippe becomes post-tropical.
October 23
- 2100 UTC (5:00 p.m. EDT) – Tropical Depression Eighteen forms 105 miles (169 km) northeast of Cabo Gracias a DiosCabo Gracias a DiosCabo Gracias a Dios is a cape located in the middle of the east coast of Central America, within what is variously called the Mosquito Coast and La Mosquitia...
, HondurasHondurasHonduras is a republic in Central America. It was previously known as Spanish Honduras to differentiate it from British Honduras, which became the modern-day state of Belize...
.
October 24
- 0300 UTC (11:00 p.m. EDT October 23) – Tropical Depression Eighteen strengthens into Tropical Storm Rina.
- 1800 UTC (2:00 p.m. EDT) – Tropical Storm Rina strengthens into a Category 1 hurricane.
October 25
- 0900 UTC (5:00 a.m. EDT) – Hurricane Rina strengthens into a Category 2 hurricane.
October 26
- 1645 UTC (11:45 a.m. CDT) – Hurricane Rina weakens into a Category 1 hurricane.
October 27
- 1500 UTC (10:00 a.m. CDT) – Hurricane Rina weakens into a tropical storm.
October 28
- 1500 UTC (10:00 a.m. CDT) – Tropical Storm Rina weakens into a tropical depression.
- 2100 UTC (4:00 p.m. CDT)– Tropical Depression Rina dissipates into a remnant low.
November
November 8- 0900 UTC (4:00 a.m. EST) – Subtropical Storm Sean forms about 445 mi (720 km) southwest of BermudaBermudaBermuda is a British overseas territory in the North Atlantic Ocean. Located off the east coast of the United States, its nearest landmass is Cape Hatteras, North Carolina, about to the west-northwest. It is about south of Halifax, Nova Scotia, Canada, and northeast of Miami, Florida...
. - 1800 UTC (2:00 p.m. AST) – Subtropical Storm Sean transitions into a tropical storm.
November 12
- 0300 UTC (11:00 p.m. AST November 11) – Tropical Storm Sean becomes post-tropical.
November 30
- The 2011 Atlantic hurricane season officially ends.
See also
- Timeline of the 2011 Pacific hurricane seasonTimeline of the 2011 Pacific hurricane seasonThe 2011 Pacific hurricane season officially started on May 15, 2011 in the eastern Pacific, designated as the area east of 140°W, and on June 1, 2011 in the central Pacific, which is between the International Date Line and 140°W, and lasted until November 30, 2011. These dates typically limit the...
- List of Atlantic hurricane seasons
- 2011 Pacific typhoon season2011 Pacific typhoon seasonThe 2011 Pacific typhoon season was the time of the year in which tropical cyclones form in the Western Pacific Ocean. The season ran throughout 2011 with most tropical cyclones forming between May and November. The scope of this article is limited to the Pacific Ocean to the north of the equator...
- 2011 North Indian Ocean cyclone season2011 North Indian Ocean cyclone seasonThe 2011 North Indian Ocean cyclone season is 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...
- 2010-11 South-West Indian Ocean cyclone season
- 2010-11 South Pacific cyclone season
- 2010-11 Australian region cyclone season