Timeline of the 2023 Atlantic hurricane season

The 2023 Atlantic hurricane season saw an above average number of named storms and an average number of hurricanes and major hurricanes (category 3 or higher on the 5-level Saffir–Simpson wind speed scale). There were twenty named storms during the season; seven of them strengthened into hurricanes, and three of those reached major hurricane intensity. The season officially began on June 1, 2023, and ended on November 30. These dates, adopted by convention, historically describe the period in each year when most subtropical or tropical cyclones form in the Atlantic. However, tropical cyclone formation is possible at any time of the year, as was the case this season, when an unnamed subtropical storm formed on January 16. The last system to dissipate was Hurricane Tammy, on October 28.

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.

By convention, meteorologists use one time zone when issuing forecasts and making observations: Coordinated Universal Time (UTC), and also use the 24-hour clock (where 00:00 = midnight UTC). The National Hurricane Center uses both UTC and the time zone where the center of the tropical cyclone is currently located. The time zones utilized (east to west) are: Greenwich, Cape Verde, Atlantic, Eastern, and Central. In this timeline, all information is listed by UTC first, with the respective regional time zone included in parentheses. Additionally, figures for maximum sustained winds and position estimates are rounded to the nearest 5 units (knots, 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.

January
January 16
 * 12:00 UTC (8:00 a.m. AST) at 37.1°N, -66.1°W – A subtropical storm forms about 300 nmi southeast of Nantucket, Massachusetts.

January 17
 * 00:00 UTC (8:00 p.m. AST, January 16) at 39.8°N, -61.6°W – The unnamed subtropical storm reaches peak intensity with maximum sustained winds of 60 kn and a minimum central pressure of 976 mbar, about 300 nmi south-southeast of Halifax, Nova Scotia.
 * 12:45 UTC (8:45 a.m. AST) at 45.9°N, -60°W – The unnamed subtropical storm makes landfall at Louisbourg, Nova Scotia, with sustained winds of 45 kn.
 * 18:00 UTC (2:00 p.m. AST) at 48.4°N, -60.2°W – The unnamed subtropical storm transitions to a post-tropical low south of the coast of far eastern Quebec, and subsequently dissipates.

June
June 1
 * The Atlantic hurricane season officially begins.
 * 12:00 UTC (7:00 a.m. CDT) at 27.7°N, -86.2°W – Tropical Depression Two forms off the western coast of Florida.

June 2
 * 18:00 UTC (1:00 p.m. CDT) at 27.3°N, -86.4°W – Tropical Depression Two strengthens into Tropical Storm Arlene.

June 3
 * 00:00 UTC (7:00 p.m. CDT, June 2) at 25.9°N, -85.7°W – Tropical Storm Arlene reaches peak intensity with maximum sustained winds of 35 kn and a minimum central pressure of 998 mbar.
 * 06:00 UTC (1:00 a.m. CDT) at 25°N, -85.6°W – Tropical Storm Arlene weakens to a tropical depression.
 * 12:00 UTC (8:00 a.m. EDT) at 24.4°N, -85.3°W – Tropical Depression Arlene degenerates into a remnant low, and subsequently dissipates.

June 19
 * 06:00 UTC (2:00 a.m. AST) at 10.7°N, -37.3°W – Tropical Depression Three forms from a tropical wave about 1300 nmi east of Barbados.
 * 18:00 UTC (2:00 p.m. AST) at 11.1°N, -40.9°W – Tropical Depression Three strengthens into Tropical Storm Bret about 1100 mi east of Barbados.

June 22
 * 00:00 UTC (8:00 p.m. AST, June 21) at 10.4°N, -39.9°W – Tropical Depression Four forms from a tropical wave over the central tropical Atlantic.
 * 06:00 UTC (2:00 a.m. AST) at 13.5°N, -55.9°W – Tropical Storm Bret reaches peak intensity with maximum sustained winds of 60 kn and a minimum central pressure of 996 mbar, east of Barbados.

June 23
 * 00:00 UTC (8:00 p.m. AST, June 22) at 11.5°N, -44.8°W – Tropical Depression Four strengthens into Tropical Storm Cindy east of the Lesser Antilles.
 * 03:15 UTC (2:15 a.m. AST) at 13.3°N, -61.2°W – Tropical Storm Bret makes landfall with sustained winds of 55 kn on Saint Vincent, Saint Vincent and the Grenadines.

June 24
 * 06:00 UTC (2:00 a.m. AST) at 14.6°N, -51.2°W – Tropical Storm Cindy reaches peak intensity with maximum sustained winds of 50 mph and a minimum central pressure of 1004 mbar.
 * 12:00 UTC (8:00 a.m. EDT) at 13°N, -70.9°W – Tropical Storm Bret opens into a trough about 60 nmi northwest of Aruba, and subsequently dissipates.

June 26
 * 03:00 UTC (11:00 p.m. AST, June 25) at 22.8°N, -60°W – Tropical Storm Cindy degenerates to an open wave about 375 mi north-northeast of the Northern Leeward Islands.

July
July 14
 * 00:00 UTC (8:00 p.m. AST, July 13) at 32.5°N, -46.7°W – Subtropical Storm Don forms from an area of low pressure about 1025 nmi southwest of the Azores.

July 16
 * 12:00 UTC (8:00 a.m. AST) at 38.9°N, -48.5°W – Subtropical Storm Don weakens to a subtropical depression about 1000 nmi west of the Azores.

July 17
 * 06:00 UTC (6:00 a.m. GMT) at 39.3°N, -45°W – Subtropical Depression Don transitions to a tropical depression about 835 nmi west of the Azores.

July 18
 * 00:00 UTC (12:00 a.m. GMT) at 37.8°N, -40.9°W – Tropical Depression Don strengthens into a tropical storm about 650 nmi west of the Azores.

July 22
 * 18:00 UTC (2:00 p.m. AST) at 39.5°N, -50.1°W – Tropical Storm Don strengthens into a Category 1 hurricane and simultaneously reaches peak intensity with maximum sustained winds of 65 kn and a minimum central pressure of 986 mbar, about 1070 nmi west-northwest of the Azores.

July 23
 * 06:00 UTC (5:00 a.m. AST) at 42°N, -49.4°W – Hurricane Don weakens to a tropical storm about 1035 nmi northwest of the Azores.

July 24
 * 06:00 UTC (6:00 a.m. GMT) at 46.7°N, -44.1°W – Tropical Storm Don transitions to a post-tropical cyclone about 885 nmi northwest of the Azores.

August
August 19
 * 06:00 UTC (2:00 a.m. AST) at 15.4°N, -47.8°W – Tropical Depression Six forms from a tropical wave east of the northern Leeward Islands.

August 20
 * 00:00 UTC (8:00 p.m. AST, August 19) at 18°N, -36.7°W – Tropical Storm Emily forms from a tropical wave over the open tropical Atlantic.
 * 12:00 UTC (8:00 a.m. AST) at 19.4°N, -38.3°W – Tropical Storm Emily reaches peak intensity with maximum sustained winds of 45 kn and a minimum central pressure of 998 mbar.
 * 12:00 UTC (8:00 a.m. AST) at 16.7°N, -53.5°W – Tropical Depression Six strengthens into Tropical Storm Gert east of the northern Leeward Islands.
 * 21:00 UTC (5:00 p.m. AST) at 14.6°N, -67.1°W – Tropical Storm Franklin forms from an area of low pressure about 270 mi south-southeast of Isla Saona, Dominican Republic.

August 21
 * 06:00 UTC (2:00 a.m. AST) at 20.6°N, -40.6°W – Tropical Storm Emily degenerates to a remnant low.
 * 12:00 UTC (8:00 a.m. AST) at 17.1°N, -57.5°W – Tropical Storm Gert weakens to a tropical depression about 375 mi east of the northern Leeward Islands.
 * 18:00 UTC (6:00 p.m. CDT) at 25°N, -90.8°W – Tropical Depression Nine forms about 360 nmi east of Brownsville, Texas, from a tropical wave.

August 22
 * 06:00 UTC (1:00 a.m. CDT) at 25.8°N, -94.3°W – Tropical Depression Nine strengthens into Tropical Storm Harold about 165 nmi east of Brownsville.
 * 12:00 UTC (8:00 a.m. AST) at 17.4°N, -59.5°W – Tropical Depression Gert degenerates to a remnant low east-southeast of the northern Leeward Islands.
 * 15:00 UTC (10:00 a.m. CDT) at 27.1°N, -97.4°W – Tropical Storm Harold reaches peak intensity with maximum sustained winds of 50 kn and a minimum central pressure of 995 mbar, and simultaneously makes landfall at Big Shell Beach, Padre Island, Texas.

August 23
 * 00:00 UTC (7:00 p.m. CDT, August 22) at 27.7°N, -100.1°W – Tropical Storm Harold weakens to a tropical depression over northeastern Mexico.
 * 12:00 UTC (8:00 a.m. EDT) at 17.9°N, -71.2°W – Tropical Storm Franklin makes landfall with sustained winds of 45 kn, about 25 mi south-southwest of Barahona, Dominican Republic.
 * 12:00 UTC (7:00 a.m. CDT) at 29.7°N, -103.7°W – Tropical Depression Harold degenerates to a remnant low over the Big Bend region of Texas and later dissipates.

August 26
 * 12:00 UTC (7:00 a.m. CDT) at 20.8°N, -86.1°W – Tropical Depression Ten forms from a disturbance that originated in the eastern Pacific Ocean about 40 nmi east-southeast of Cancún, Quintana Roo.
 * 15:00 UTC (11:00 a.m. AST) at 23.5°N, -66.7°W – Tropical Storm Franklin strengthens into a Category 1 hurricane about 315 mi east-northeast of Grand Turk Island.

August 27
 * 06:00 UTC (1:00 a.m. CDT) at 20.5°N, -86.8°W – Tropical Depression Ten makes land fall on Cozumel.
 * 12:00 UTC (7:00 a.m. CDT) at 19.9°N, -86.3°W – Tropical Depression Ten strengthens into Tropical Storm Idalia about 45 nmi southeast of Cozumel.
 * 15:00 UTC (11:00 a.m. AST) at 25.1°N, -69.3°W – Hurricane Franklin intensifies to Category 2 strength about 275 mi north-northeast of Grand Turk Island.

August 28
 * 09:00 UTC (5:00 a.m. EDT) at 27.2°N, -70.8°W – Hurricane Franklin intensifies to Category 3 strength about 395 mi north of Grand Turk Island.
 * 11:35 UTC (7:35 a.m. EDT) at 27.4°N, -70.8°W – Hurricane Franklin intensifies to Category 4 strength about 405 mi north of Grand Turk Island.

August 29
 * 00:00 UTC (8:00 p.m. EDT, August 28) at 29°N, -71.1°W – Hurricane Franklin reaches peak intensity with maximum sustained winds of 130 kn and a minimum central pressure of 926 mbar, about 440 mi west-southwest of Bermuda.
 * 00:00 UTC (8:00 p.m. AST, August 28) at 27.7°N, -51.7°W – Tropical Depression Eleven forms over the central subtropical Atlantic from a tropical wave.
 * 06:00 UTC (1:00 a.m. CDT) at 22.6°N, -85°W – Tropical Storm Idalia strengthens into a Category 1 hurricane about 55 mi north of the western tip of Cuba.
 * 18:00 UTC (2:00 p.m. EDT) at 31°N, -70.2°W – Hurricane Franklin weakens to Category 3 strength about 330 mi west-southwest of Bermuda.

August 30
 * 00:00 UTC (8:00 p.m. EDT) at 26.9°N, -84.7°W – Hurricane Idalia intensifies to Category 2 strength about 110 nmi west of Tampa, Florida.
 * 06:00 UTC (2:00 a.m. EDT) at 28.3°N, -84.5°W – Hurricane Idalia intensifies to Category 3 strength about 85 nmi southwest of Cedar Key, Florida.
 * 09:00 UTC (5:00 a.m. EDT) at 29.1°N, -84.1°W – Hurricane Idalia intensifies to Category 4 strength and simultaneously reaches peak intensity with maximum sustained winds of 115 kn and a minimum central pressure of 942 mbar, about 80 nmi south of Tallahassee, Florida.
 * 09:00 UTC (5:00 a.m. AST) at 33°N, -68.2°W – Hurricane Franklin weakens to Category 2 strength about 205 mi west-northwest of Bermuda.
 * 11:45 UTC (7:45 a.m. EDT) at 29.9°N, -83.6°W – Hurricane Idalia makes landfall at Category 3 strength with sustained winds of 100 kn, near Keaton Beach, Florida.
 * 18:00 UTC (2:00 p.m. EDT) at 31.5°N, -82.5°W – Hurricane Idalia weakens to a tropical storm near Waycross, Georgia.

August 31
 * 00:00 UTC (8:00 p.m. AST, August 30) at 28.3°N, -52.1°W – Tropical Depression Eleven strengthens into Tropical Storm Jose.
 * 12:00 UTC (8:00 a.m. EDT) at 33.7°N, -77°W – Tropical Storm Idalia transitions to an extratropical cyclone about 50 nmi east of Cape Fear, North Carolina.
 * 18:00 UTC (2:00 p.m. AST) at 28.6°N, -57°W – Remnants of Gert re-developes into a tropical depression far north of the Leeward Islands.
 * 18:00 UTC (5:00 p.m. CVT) at 17°N, -27°W – Tropical Depression Twelve forms from a tropical wave near Cabo Verde.
 * 21:00 UTC (5:00 p.m. AST) at 36°N, -60.1°W – Hurricane Franklin weakens to Category 1 strength about 370 mi northeast of Bermuda.

September
September 1
 * 00:00 UTC (8:00 p.m. AST, August 13) at 31.6°N, -52.5°W – Tropical Storm Jose reaches peak intensity with maximum sustained winds of 55 kn and a minimum central pressure of 996 mbar.
 * 18:00 UTC (2:00 p.m. AST) at 27.9°N, -54.8°W – Tropical Depression Gert re-strengthens to a tropical storm.
 * 18:00 UTC (2:00 p.m. AST) at 37.4°N, -49.8°W – Tropical Storm Jose becomes absorbed into PostTropical Cyclone Franklin.
 * 21:00 UTC (5:00 p.m. AST) at 39.5°N, -53.8°W – Hurricane Franklin transitions to an extratropical cyclone about 790 mi northeast of Bermuda.

September 2
 * 00:00 UTC (11:00 p.m. CVT, September 1) at 21.1°N, -28.5°W – Tropical Depression Twelve strengthens into Tropical Storm Katia.
 * 18:00 UTC (2:00 p.m. AST) at 24.5°N, -30.1°W – Tropical Storm Katia reaches peak intensity with maximum sustained winds of 50 kn and a minimum central pressure of 998 mbar.

September 3
 * 00:00 UTC (8:00 p.m. AST, September 2) at 28.6°N, -58.5°W – Tropical Storm Gert reaches peak intensity with maximum sustained winds of 50 kn and a minimum central pressure of 998 mbar.

September 4
 * 00:00 UTC (12:00 a.m. GMT) at 27.1°N, -33.3°W – Tropical Storm Katia weakens to a tropical depression.
 * 06:00 UTC (6:00 a.m. GMT) at 27.4°N, -33.6°W – Tropical Depression Katia degenerates to a remnant low and subsequently dissipates.
 * 15:00 UTC (11:00 a.m. AST) at 39.4°N, -58°W – Tropical Storm Gert degenerates into a remnant low and later dissipates.

September 5
 * 12:00 UTC (8:00 a.m. AST) at 12.2°N, -39.6°W – Tropical Depression Thirteen forms from a tropical wave about midway between the coast of west Africa and the Windward Islands.
 * 18:00 UTC (2:00 p.m. AST) at 12.9°N, -41.1°W – Tropical Depression Thirteen strengthens into Tropical Storm Lee.

September 6
 * 18:00 UTC (2:00 p.m. AST) at 14.6°N, -46.1°W – Tropical Storm Lee strengthens into a Category 1 hurricane.

September 7
 * 12:00 UTC (8:00 a.m. AST) at 16.1°N, -49.2°W – Hurricane Lee intensifies to Category 2 strength.
 * 12:00 UTC (11:00 a.m. CVT) at 15.5°N, -26°W – Tropical Depression Fourteen forms from a tropical wave near Cabo Verde.
 * 18:00 UTC (2:00 p.m. AST) at 16.6°N, -50.7°W – Hurricane Lee intensifies to Category 3 strength.
 * 18:00 UTC (5:00 p.m. CVT) at 16°N, -27.3°W – Tropical Depression Fourteen strengthens into Tropical Storm Margot.

September 8
 * 00:00 UTC (8:00 p.m. AST, September 7) at 17°N, -51.8°W – Hurricane Lee intensifies to Category 4 strength.
 * 06:00 UTC (2:00 a.m. AST) at 17.5°N, -53°W – Hurricane Lee intensifies to Category 5 strength, and simultaneously reaches peak intensity with maximum sustained winds of 145 kn and a minimum central pressure of 926 mbar, several hundred miles east of the Leeward Islands.
 * 12:00 UTC (8:00 a.m. AST) at 17.9°N, -54.1°W – Hurricane Lee weakens to Category 4 strength.

September 9
 * 00:00 UTC (8:00 p.m. AST, September 8) at 19°N, -56°W – Hurricane Lee weakens to Category 3 strength.
 * 18:00 UTC (2:00 p.m. AST) at 20.4°N, -58.8°W – Hurricane Lee weakens to Category 2 strength.

September 10
 * 18:00 UTC (2:00 p.m. AST) at 21.9°N, -61.4°W – Hurricane Lee re-intensifies to Category 3 strength north of the Leeward Islands.

September 11
 * 12:00 UTC (8:00 a.m. AST) at 23.2°N, -63.2°W – Hurricane Lee reaches a secondary peak with maximum sustained winds of 105 kn and a minimum central pressure of 948 mbar.
 * 18:00 UTC (6:00 p.m. GMT) at 26.4°N, -39.9°W – Tropical Storm Margot strengthens into a Category 1 hurricane.

September 12
 * 06:00 UTC (6:00 a.m. GMT) at 33°N, -39.9°W – Hurricane Margot reaches peak intensity with maximum sustained winds of 80 kn and a minimum central pressure of 969 mbar.

September 13
 * 12:00 UTC (8:00 a.m. AST) at 26°N, -67.2°W – Hurricane Lee weakens to Category 2 strength about 460 mi south-southwest of Bermuda.

September 14
 * 12:00 UTC (8:00 a.m. AST) at 29.8°N, -68.2°W – Hurricane Lee weakens to Category 1 strength about 265 mi southwest of Bermuda.

September 15
 * 06:00 UTC (6:00 a.m. GMT) at 36.7°N, -38.6°W – Hurricane Margot weakens to a tropical storm.
 * 06:00 UTC (2:00 a.m. AST) at 13.6°N, -42.2°W – Tropical Depression Fifteen forms from a tropical wave over the tropical Atlantic.

September 16
 * 06:00 UTC (2:00 a.m. AST) at 40.9°N, -66°W – Hurricane Lee transitions to an extratropical cyclone roughly 285 mi south-southwest of Halifax, Nova Scotia.

September 17
 * 00:00 UTC (12:00 a.m. GMT) at 34°N, -40.1°W – Tropical Storm Margot degenerates into a remnant low and subsequently dissipates.
 * 00:00 UTC (8:00 p.m. AST, September 16) at 21.4°N, -47.6°W – Tropical Depression Fifteen strengthens into Tropical Storm Nigel.

September 18
 * 06:00 UTC (2:00 a.m. AST) at 26°N, -50.6°W – Tropical Storm Nigel strengthens into a Category 1 hurricane.

September 19
 * 18:00 UTC (2:00 p.m. AST) at 31.1°N, -54.7°W – Hurricane Nigel intensifies to Category 2 strength.

September 20
 * 00:00 UTC (8:00 p.m. AST, September 19) at 32.4°N, -55°W – Hurricane Nigel reaches peak intensity with maximum sustained winds of 85 kn and a minimum central pressure of 971 mbar over the Central Atlantic.
 * 12:00 UTC (8:00 a.m. AST) at 35.2°N, -54.7°W – Hurricane Nigel weakens to Category 1 strength.

September 22
 * 06:00 UTC (6:00 a.m. GMT) at 45.4°N, -34.4°W – Hurricane Nigel transitions to an extratropical cyclone, and subsequently dissipates.
 * 18:00 UTC (2:00 p.m. EDT) at 32.7°N, -76.1°W – Tropical Storm Ophelia forms from a non-tropical area of low pressure about 150 mi southeast of Cape Fear, North Carolina.

September 23
 * 06:00 UTC (2:00 a.m. EDT) at 33.8°N, -77.1°W – Tropical Storm Ophelia reaches peak intensity with maximum sustained winds of 60 kn and a minimum central pressure of 981 mbar, about 55 mi southwest of Cape Lookout, North Carolina.
 * 06:00 UTC (2:00 a.m. AST) at 15.5°N, -36.6°W – Tropical Depression Seventeen forms about 1350 nmi east of Barbados.
 * 10:15 UTC (6:15 a.m. EDT) at 34.7°N, -77.1°W – Tropical Storm Ophelia makes landfall near Emerald Isle, North Carolina with sustained winds of 60 kn.
 * 18:00 UTC (2:00 p.m. AST) at 15.7°N, -39.1°W – Tropical Depression Seventeen strengthens into Tropical Storm Philippe about 1205 nmi east of Barbados.

September 24
 * 00:00 UTC (8:00 p.m. EDT, September 23) at 36.8°N, -77.6°W – Tropical Storm Ophelia degenerates to a remnant low south-southwest of Richmond, Virginia.

September 25
 * 06:00 UTC (2:00 a.m. AST) at 17.1°N, -43.8°W – Tropical Storm Philippe reaches peak intensity with maximum sustained winds of 50 kn and a minimum central pressure of 998 mbar about 1000 nmi east of Barbuda.

September 28
 * 06:00 UTC (2:00 a.m. AST) at 15.6°N, -44.5°W – Tropical Storm Rina forms east of the northern Leeward Islands.

September 29
 * 06:00 UTC (2:00 a.m. AST) at 18.6°N, -46.4°W – Tropical Storm Rina reaches peak intensity with maximum sustained winds of 45 kn and a minimum central pressure of 999 mbar east of the Northern Leeward Islands.

October
October 1
 * 18:00 UTC (2:00 p.m. AST) at 25.8°N, -55.3°W – Tropical Storm Rina degenerates into a remnant low northeast of the northern Leeward Islands.

October 2
 * 22:45 UTC (6:45 p.m. AST) at 17.6°N, -61.8°W – Tropical Storm Philippe makes landfall on Barbuda with sustained winds of 45 kn.

October 6
 * 06:00 UTC (02:00 a.m. AST) at 28.7°N, -65.5°W – Tropical Storm Philippe is absorbed by an extratropical low about 150 nmi south of Bermuda.

October 10
 * 18:00 UTC (2:00 p.m. AST) at 9.6°N, -30.2°W – Tropical Depression Nineteen forms from a low-latitude tropical wave far southwest of Cabo Verde.

October 11
 * 00:00 UTC (8:00 p.m. AST, October 10) at 9.8°N, -31.4°W – Tropical Depression Nineteen strengthens into Tropical Storm Sean.
 * 18:00 UTC (2:00 p.m. AST) at 11.3°N, -34.7°W – Tropical Storm Sean weakens to a tropical depression.

October 12
 * 12:00 UTC (8:00 a.m. AST) at 12.8°N, -37.1°W – Tropical Depression Sean re-strengthens to a tropical storm.
 * 18:00 UTC (2:00 p.m. AST) at 13.3°N, -37.8°W – Tropical Storm Sean reaches peak intensity with maximum sustained winds of 40 kn and a minimum central pressure of 1005 mbar.

October 14
 * 06:00 UTC (2:00 a.m. AST) at 15.3°N, -43.3°W – Tropical Storm Sean weakens to a tropical depression.

October 15
 * 12:00 UTC (8:00 a.m. AST) at 17.6°N, -46.6°W – Tropical Depression Sean degenerates into a remnant low far east of the northern Leeward Islands, and subsequently dissipates.

October 18
 * 18:00 UTC (2:00 p.m. AST) at 12.9°N, -51°W – Tropical Storm Tammy forms from a well-defined tropical wave about 500 nmi east of the Lesser Antilles.

October 20
 * 18:00 UTC (2:00 p.m. AST) at 14.1°N, -58.9°W – Tropical Storm Tammy strengthens into a Category 1 hurricane about 100 nmi east of the Lesser Antilles.

October 22
 * 01:15 UTC (9:15 p.m. AST October 21) at 17.6°N, -61.8°W – Hurricane Tammy makes landfall with sustained winds of 80 kn on Barbuda.

October 23
 * 21:00 UTC (5:00 p.m. EDT) at 11.6°N, -83.5°W – Tropical Depression Twenty-One forms from an area of disturbed weather along the eastern portion of the eastern Pacific monsoon trough about 70 nmi east of the coast of southern Nicaragua.

October 24
 * 01:30 UTC (9:30 p.m. EDT, October 23) at 12.4°N, -83.5°W – Tropical Depression Twenty-One makes landfall about 30 nmi north-northeast of Bluefields, Nicaragua.
 * 12:00 UTC (8:00 a.m. EDT) at 13.5°N, -84.4°W – Tropical Depression Twenty-One degenerates into a remnant low inland, and later dissipates.

October 25
 * 06:00 UTC (2:00 a.m. AST) at 25.1°N, -60.4°W – Hurricane Tammy intensifies to Category 2 strength.
 * 12:00 UTC (8:00 a.m. AST) at 26.1°N, -59.4°W – Hurricane Tammy reaches peak intensity with maximum sustained winds of 95 kn and a minimum central pressure of 965 mbar.

October 26
 * 00:00 UTC (8:00 p.m. AST, October 25) at 29.9°N, -57.8°W – Hurricane Tammy weakens to Category 1 strength.

October 27
 * 00:00 UTC (8:00 p.m. AST, October 26) at 31.5°N, -60.1°W – Hurricane Tammy weakens to a tropical storm.

October 29
 * 00:00 UTC (8:00 p.m. AST, October 28) at 32.8°N, -56.1°W – Tropical Storm Tammy degenerates into a remnant low, and subsequently dissipates over the central Atlantic.

November

 * No tropical cyclones form in the basin during the month of November.

November 30
 * The Atlantic hurricane season officially ends.