The 2015 Atlantic hurricane season was an event in the annual hurricane season in the north Atlantic Ocean. It was the third consecutive year to feature below-average tropical cyclone activity, with eleven named storms. The season officially began on June 1, 2015 and ended on November 30, 2015. These dates, adopted by convention, historically describe the period in each year when most tropical systems form. However, systems can and do form outside these dates, as did the season's first storm, Tropical Storm Ana, which developed on May 8; the season's final storm, Hurricane Kate, lost its tropical characteristics on November 11.

The year featured twelve tropical cyclones, of which eleven became tropical storms, including four hurricanes of which two intensified into major hurricanes. While no hurricanes made landfall on the United States mainland during the year, two tropical storms, Ana and Bill, struck the coastline of South Carolina and Texas respectively. Ana was earliest landfalling tropical storm on record in the United States and caused two fatalities, while Bill produced heavy rain and flooding and caused eight fatalities. Additionally, the precursor to Bill also caused significant flooding across Central America. In late August, Tropical Storm Erika brought heavy rainfall to several Leeward Islands, especially to Dominica. It caused widespread damage and 31 fatalities. In October, Hurricane Joaquin, a Category 4 hurricane, battered The Bahamas for two days, causing extensive devastation to that nation while also contributing to historic flooding across the Southeastern United States. Additionally, Joaquin was responsible sinking of the American cargo ship El Faro and for the deaths of its 33–member crew. Following the 2015 season, the names Erika and Joaquin were retired from reuse in the North Atlantic by the World Meteorological Organization.

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

May

May 8 00:00 UTC (8:00 p.m. EDT, May 7) at Subtropical Storm Ana forms from a non-tropical low about south-southeast of Myrtle Beach, South Carolina.

May 9 00:00 UTC (8:00 p.m. EDT, May 8) at Subtropical Storm Ana attains its peak intensity with maximum sustained winds of and a minimum barometric pressure of , about southeast of Myrtle Beach, South Carolina. 06:00 UTC (2:00 a.m. EDT) at Subtropical Storm Ana transitions into a tropical storm about southeast of Myrtle Beach.

May 10 10:00 UTC (6:00 a.m. EDT) at Tropical Storm Ana makes landfall about southwest of North Myrtle Beach, South Carolina with winds of . 18:00 UTC (2:00 p.m. EDT) at Tropical Storm Ana weakens to a tropical depression about north of North Myrtle Beach.

May 12 00:00 UTC (8:00 p.m. EDT, May 11) at Tropical Depression Ana degenerates into a remnant low as it moves off of the Delmarva Peninsula, and subsequently merges with a frontal system.

June

June 1 The 2015 Atlantic hurricane season officially begins.

June 16 00:00 UTC (7:00 p.m. CDT, June 15) at Tropical Storm Bill develops as a result of the interaction of an upper-level trough and a broad area of low pressure about east-southeast of Corpus Christi, Texas. 12:00 UTC (7:00 a.m. CDT) at Tropical Storm Bill attains its peak intensity with maximum sustained winds of and a minimum pressure of , about east-northeast of Corpus Christi. 16:45 UTC (11:45 a.m. CDT) at Tropical Storm Bill makes landfall on Matagorda Island, Texas, with winds of .

June 17 06:00 UTC (1:00 a.m. CDT) at Tropical Storm Bill weakens to a tropical depression about east of Austin, Texas.

June 18 18:00 UTC (1:00 p.m. CDT) at Tropical Depression Bill degenerates into remnant low about south-southeast of Tulsa, Oklahoma, and subsequently dissipates.

July

July 13 06:00 UTC (2:00 a.m. AST) at A tropical depression develops from a shortwave trough about east-northeast of Cape Hatteras, North Carolina. 12:00 UTC (8:00 a.m. AST) at The tropical depression intensifies into Tropical Storm Claudette about east of Cape Hatteras. 18:00 UTC (2:00 p.m. AST) at Tropical Storm Claudette attains its peak intensity with maximum sustained winds of and a minimum pressure of , about south-southeast of Cape Cod, Massachusetts.

July 15 00:00 UTC (8:00 p.m. AST, July 14) at Tropical Storm Claudette degenerates into a remnant low about southwest of Newfoundland, and is later absorbed by a frontal system.

August

August 18 06:00 UTC (2:00 a.m. AST) at Tropical Depression Four develops from a tropical wave about west-southwest of Praia, Cape Verde. 12:00 UTC (8:00 a.m. AST) at Tropical Depression Four intensifies into Tropical Storm Danny about west-southwest of Praia.

August 20 12:00 UTC (8:00 a.m. AST) at Tropical Storm Danny intensifies into a Category 1 hurricane about east of the Windward Islands.

August 21 00:00 UTC (8:00 p.m. AST, August 20) at Hurricane Danny intensifies into a Category 2 hurricane about east of the Windward Islands. 12:00 UTC (8:00 a.m. AST) at Hurricane Danny intensifies into a Category 3 hurricane and simultaneously attains its peak intensity with maximum sustained winds of and a minimum pressure of , about east of the Windward Islands.

August 22 00:00 UTC (8:00 p.m. AST, August 21) at Hurricane Danny weakens to a Category 2 hurricane about east of the Windward Islands. 12:00 UTC (8:00 a.m. AST) at Hurricane Danny weakens to a Category 1 hurricane about east of the Windward Islands.

August 23 00:00 UTC (8:00 p.m. AST, August 22) at Hurricane Danny weakens to a tropical storm about east of the Windward Islands.

August 24 12:00 UTC (8:00 a.m. AST) at Tropical Storm Danny weakens to a tropical depression about east of the Windward Islands, and later degenerates into an open wave. 18:00 UTC (2:00 p.m. AST) at Tropical Storm Erika forms from a tropical wave about east of the Lesser Antilles.

August 27 06:00 UTC (2:00 a.m. AST) at Tropical Storm Erika attains its peak intensity with maximum sustained winds of and a minimum pressure of , about east of northern tip of Guadeloupe.

August 28 12:00 UTC (9:30 a.m. EDT) at Tropical Storm Erika degenerates into a remnant low about south of the eastern tip of Hispaniola, and subsequently dissipates.

August 30 00:00 UTC (8:00 p.m. AST, August 29) at Tropical Depression Six develops from a tropical wave about west-northwest of Conakry, Guinea. 06:00 UTC (2:00 a.m. AST) at Tropical Depression Six intensifies into Tropical Storm Fred about northwest of Conakry.

August 31 00:00 UTC (8:00 p.m. AST, August 30) at Tropical Storm Fred intensifies into a Category 1 hurricane about south-southeast of Sal, Cape Verde. 12:00 UTC (8:00 a.m. AST) at Hurricane Fred attains its peak intensity with maximum sustained winds of and a minimum pressure of , about south-southwest of Sal.

September

September 1 06:00 UTC (2:00 a.m. AST) at Hurricane Fred weakens to a tropical storm about west of Sal.

September 4 12:00 UTC (8:00 a.m. AST) at Tropical Storm Fred weakens to a tropical depression about southwest of the Azores.

September 5 00:00 UTC (8:00 p.m. AST, September 4) at Tropical Depression Fred re-intensifies into a tropical storm about southwest of the Azores. 06:00 UTC (2:00 a.m. AST) at Tropical Depression Seven develops from a tropical wave about south of the Cape Verde Islands. 12:00 UTC (8:00 a.m. AST) at Tropical Storm Fred again weakens to a tropical depression, about southwest of the Azores, and later degenerates into a trough. 18:00 UTC (2:00 p.m. AST) at Tropical Depression Seven intensifies into Tropical Storm Grace about south-southwest of the Cape Verde Islands.

September 6 12:00 UTC (8:00 a.m. AST) at Tropical Storm Grace attains its peak intensity with maximum sustained winds of and a minimum barometric pressure of , about southwest of the Cape Verde Islands.

September 8 12:00 UTC (8:00 a.m. AST) at Tropical Storm Grace weakens to a tropical depression about west of the Cape Verde Islands, and later degenerates into a trough. 18:00 UTC (2:00 p.m. AST) at Tropical Depression Eight develops from a non-tropical weather system about southeast of Bermuda.

September 9 00:00 UTC (8:00 p.m. AST, September 8) at Tropical Depression Eight intensifies into Tropical Storm Henri about southeast of Bermuda. 18:00 UTC (2:00 p.m. AST) at Tropical Storm Henri attains its peak intensity with maximum sustained winds of and a minimum barometric pressure of , about east-southeast of Bermuda.

September 11 06:00 UTC (2:00 a.m. AST) at Tropical Storm Henri degenerates into a trough, about northeast of Bermuda, and subsequently merges with a large extratropical cyclone.

September 16 12:00 UTC (8:00 a.m. AST) at Tropical Depression Nine develops from a tropical wave about west of the Cape Verde Islands.

September 17 06:00 UTC (2:00 a.m. AST) at Tropical Depression Nine attains its peak intensity with maximum sustained winds of and a minimum barometric pressure of , about east of the Lesser Antilles.

September 18 06:00 UTC (2:00 a.m. AST) at Tropical Depression Ten develops from a tropical wave about west of the southernmost Cape Verde Islands.

September 19 00:00 UTC (8:00 p.m. AST, September 18) at Tropical Depression Ten intensifies into Tropical Storm Ida about west of the southernmost Cape Verde Islands. 12:00 UTC (8 a.m. AST) at Tropical Depression Nine is assessed with a Dvorak classification of too weak to classify as a tropical depression; it dissipates a few hours later, about east of the northern Leeward Islands.

September 21 12:00 UTC (8:00 a.m. AST) at Tropical Storm Ida attains its peak intensity with maximum sustained winds of and a minimum barometric pressure of , about east of the northern Leeward Islands.

September 24 06:00 UTC (2:00 a.m. AST) at Tropical Storm Ida weakens to a tropical depression about east of the northern Leeward Islands.

September 27 12:00 UTC (8:00 a.m. AST) at Tropical Depression Ida degenerates into a remnant low about east of the northern Leeward Islands, and later degenerates into a trough.

September 28 00:00 UTC (8:00 p.m. AST, September 27) at Tropical Depression Eleven develops from a weak mid- to upper-tropospheric low about northeast of San Salvador Island, Bahamas.

September 29 00:00 UTC (8:00 p.m. EDT, September 28) at Tropical Depression Eleven intensifies into Tropical Storm Joaquin about northeast of San Salvador Island.

September 30 06:00 UTC (2:00 a.m. EDT) at Tropical Storm Joaquin intensifies into a Category 1 hurricane about east-northeast of San Salvador Island.

October

October 1 00:00 UTC (8:00 p.m. EDT, September 30) at Hurricane Joaquin intensifies into a Category 3 hurricane about east of San Salvador Island. 12:00 UTC (8:00 a.m. EDT) at Hurricane Joaquin intensifies into a Category 4 hurricane and makes landfall on Samana Cay, Bahamas, with winds of .

October 2