Timeline of the 2021 Atlantic hurricane season

The 2021 Atlantic hurricane season was the third most active Atlantic hurricane season on record with 21 named storms, and the sixth consecutive year in which there was above-average tropical cyclone activity[nb 1][2] The season officially began on June 1, 2021, and ended on November 30, 2021. These dates, adopted by convention, historically describe the period in each year when most Northern Atlantic tropical cyclones form.[3] However, tropical cyclone formation is possible at any time of the year, as was the case this season, when Tropical Storm Ana formed on May 22. The season's final system, Tropical Storm Wanda, dissipated on November 7. Of the season's 21 named storms, seven became hurricanes, and four further intensified into major hurricanes.[nb 2][5] The season's most devastating storm was Hurricane Ida. It made landfall in Louisiana with maximum sustained winds of 150 mph (240 km/h), destroying coastal communities in its path; parts of the New Orleans metropolitan area were left without power for several weeks.[6] The storm caused an estimated $64.5 billion (2021 USD) in damages and resulted in at least 95 deaths.[7] Over half of those deaths occurred in New York and New Jersey, as the hurricane's remnants brought rains that triggered widespread flooding throughout that region.[6] Rains from its predecessor tropical wave also caused damaging floods and landslides across Venezuela, resulting in at least 20 deaths.[8]

For broader coverage of this topic, see 2021 Atlantic hurricane season.
Timeline of the
2021 Atlantic hurricane season
Season summary map
Season boundaries
First system formedMay 22, 2021
Last system dissipatedNovember 7, 2021
Strongest system
NameSam
Maximum winds155 mph (250 km/h)
(1-minute sustained)
Lowest pressure929 mbar (hPa; 27.43 inHg)
Longest lasting system
NameSam
Duration13 days
Storm articles

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).[9] 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.[10] 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.

Timeline
October 2021 nor'easterHurricane SamHurricane NicholasHurricane LarryHurricane IdaHurricane HenriHurricane GraceTropical Storm Fred (2021)Hurricane ElsaTropical Storm Danny (2021)Tropical Storm Claudette (2021)Saffir-Simpson scale

May
Ana as a subtropical storm on May 22

May 22

  • 06:00 UTC (2:00 a.m. AST) at 34.2°N 62.1°W / 34.2; -62.1 – Subtropical Storm Ana forms from an extratropical cyclone about 200 mi (325 km) northeast of Bermuda.[11]

May 23

June

June 1

  • The 2021 Atlantic hurricane season officially begins.[3]

June 14

June 15

  • 12:00 UTC (8:00 a.m. AST) at 39.4°N 64.0°W / 39.4; -64.0 – Tropical Storm Bill reaches its peak intensity with maximum sustained winds of 65 mph (100 km/h) and a minimum central pressure of 992 mbar (29.29 inHg), about 345 mi (555 km) east-southeast of Chatham, Massachusetts.[12]

June 16

Claudette over Mississippi on June 19

June 19

June 21

June 22

June 27

June 28

June 29

  • 00:00 UTC (8:00 p.m. EDT, June 28) at 32.4°N 80.7°W / 32.4; -80.7 – Tropical Storm Danny weakens into a tropical depression inland over eastern South Carolina, and later dissipates over eastern Georgia.[19]

July

July 1

  • 03:00 UTC (11:00 p.m. AST, June 30) at 9.6°N 46.3°W / 9.6; -46.3 – Tropical Depression Five forms about 1,020 mi (1,640 km) east-southeast of the Windward Islands.[nb 4][21]
  • 09:00 UTC (5:00 a.m. AST) at 9.4°N 48.8°W / 9.4; -48.8 – Tropical Depression Five strengthens into Tropical Storm Elsa about 865 mi (1,390 km) east-southeast of the Windward Islands.[22]
Elsa over the Lesser Antilles as a Category 1 hurricane on July 2

July 2

July 3

July 5

July 7

July 9

August

August 11

August 12

August 13

August 14

Fred off the coast of Florida on August 15

August 15

August 16

August 17

August 18

August 19

Satellite loop of Hurricane Grace rapidly intensifying in the Bay of Campeche on August 20

August 20

August 21

August 22

August 23

Ida as a rapidly intensifying Category 4 hurricane nearing landfall in Louisiana on August 29

August 26

August 27

August 28

August 29

August 30

August 31

September
Larry as a high-end Category 3 hurricane on September 5, displaying annular characteristics

September 1

September 2

  • 09:00 UTC (5:00 a.m. AST) at 13.0°N 32.3°W / 13.0; -32.3 – Tropical Storm Larry strengthens into a Category 1 hurricane about 545 mi (875 km) west-southwest of Cabo Verde.[80]

September 3

September 4

  • 03:00 UTC (11:00 p.m. AST, September 3) at 16.3°N 44.6°W / 16.3; -44.6 – Hurricane Larry intensifies to Category 3 strength about 1,140 mi (1,835 km) east of the Leeward Islands.[82]

September 5

  • 15:00 UTC (11:00 a.m. AST) at 19.5°N 49.7°W / 19.5; -49.7 Hurricane Larry reaches peak intensity with winds of 125 mph (200 km/h) and a minimum central pressure of 955 mbar (28.2 inHg) about 1,285 mi (2,070 km) southeast of Bermuda.[83]

September 8

September 9

September 10

September 11

September 12

September 14

September 15

September 16

September 17

  • 18:00 UTC (2:00 p.m. EDT) at 35.9°N 72.7°W / 35.9; -72.7 – Tropical Storm Odette forms from a surface trough associated with a mid- to upper-level low about 175 mi (280 km) east of the North Carolina–Virginia border.[99]

September 18

September 19

  • 03:00 UTC (11:00 p.m. AST, September 18) at 16.4°N 53.1°W / 16.4; -53.1 – Tropical Depression Sixteen forms about 670 mi (1,080 km) east of the northern Leeward Islands.[100]
  • 09:00 UTC (5:00 a.m. AST) at 18.1°N 53.5°W / 18.1; -53.5 – Tropical Depression Sixteen strengthens into Tropical Storm Peter about 630 mi (1,015 km) east of the Leeward Islands.[101]
  • 09:00 UTC (8:00 a.m. CVT) at 11.8°N 28.2°W / 11.8; -28.2 – Tropical Depression Seventeen forms about 330 mi (530 km) southwest of southernmost Cabo Verde Islands.[102]
  • 21:00 UTC (8:00 p.m. CVT) at 14.3°N 29.9°W / 14.3; -29.9 – Tropical Depression Seventeen strengthens into Tropical Storm Rose about 370 mi (595 km) west of the southernmost Cabo Verde Islands.[103]
Peter in the tropical Atlantic north of the Leeward Islands on September 20

September 20

  • 03:00 UTC (11:00 p.m. AST, September 19) at 18.6°N 58.5°W / 18.6; -58.5 – Tropical Storm Peter attains its peak intensity with maximum sustained winds of 50 mph (85 km/h) and a minimum central pressure of 1004 mb (29.65 inHg), about 305 mi (485 km) east of the northern Leeward Islands.[104]

September 21

  • 03:00 UTC (11:00 p.m. AST, September 20) at 18.7°N 35.0°W / 18.7; -35.0 – Tropical Storm Rose attains its peak intensity with maximum sustained winds of 50 mph (85 km/h) and a minimum central pressure of 1003 mb (29.62 inHg), about 750 mi (1,210 km) west-northwest of the southernmost Cabo Verde Islands.[105]
  • 21:00 UTC (5:00 p.m. AST) at 20.5°N 65.0°W / 20.5; -65.0 – Tropical Storm Peter weakens to a tropical depression, about 160 mi (260 km) east-northeast of San Juan, Puerto Rico.[106]

September 22

  • 03:00 UTC (11:00 p.m. AST, September 21) at 22.9°N 37.9°W / 22.9; -37.9 – Tropical Storm Rose weakens into a tropical depression about 1,020 mi (1,645 km) west-northwest of the Cabo Verde Islands.[107]
  • 21:00 UTC (5:00 p.m. AST) at 10.1°N 33.0°W / 10.1; -33.0 – Tropical Depression Eighteen forms about 2,030 mi (3,265 km) east-southeast of the Northern Leeward Islands.[108]

September 23

  • 03:00 UTC (11:00 p.m. AST, September 22) at 22.1°N 67.0°W / 22.1; -67.0 – Tropical Depression Peter degenerates into a remnant low about 260 mi (420 km) north-northwest of San Juan.[109]
  • 09:00 UTC (9:00 a.m. GMT) at 25.2°N 41.6°W / 25.2; -41.6 – Tropical Depression Rose transitions into a post-tropical cyclone about 1,300 mi (2,090 km) west-northwest of the Cabo Verde Islands.[110]
  • 15:00 UTC (11:00 a.m. AST) at 10.9°N 38.1°W / 10.9; -38.1 – Tropical Depression Eighteen strengthens into Tropical Storm Sam about 1,745 mi (2,805 km) east-southeast of the Northern Leeward Islands.[111]

September 24

  • 09:00 UTC (5:00 a.m. AST) at 11.5°N 42.2°W / 11.5; -42.2 – Tropical Storm Sam strengthens into a Category 1 hurricane about 1,470 mi (2,365 km) east-southeast of the Northern Leeward Islands.[112]
  • 21:00 UTC (5:00 p.m. AST) at 34.5°N 64.5°W / 34.5; -64.5 – Subtropical Storm Teresa forms about 155 mi (245 km) north of Bermuda, and simultaneously reaches peak intensity with maximum sustained winds of 45 mph (75 km/h) and a minimum central pressure of 1008 mb (29.77 inHg).[113]

September 25

  • 03:00 UTC (11:00 p.m. AST, September 24) at 12.4°N 45.9°W / 12.4; -45.9 – Hurricane Sam intensifies to Category 2 strength about 1,215 mi (1,950 km) east-southeast of the Northern Leeward Islands.[114]
  • 15:00 UTC (11:00 a.m. AST) at 12.9°N 47.6°W / 12.9; -47.6 – Hurricane Sam intensifies to Category 3 strength about 1,095 mi (1,760 km) east-southeast of the Northern Leeward Islands.[115]
  • 15:00 UTC (11:00 a.m. AST) at 34.3°N 65.0°W / 34.3; -65.0 – Subtropical Storm Teresa weakens into a subtropical depression about 140 mi (225 km) north of Bermuda.[116]
  • 21:00 UTC (5:00 p.m. AST) at 13.3°N 48.5°W / 13.3; -48.5 – Hurricane Sam intensifies to Category 4 strength about 1,025 mi (1,655 km) east-southeast of the Northern Leeward Islands.[117]
  • 21:00 UTC (5:00 p.m. AST) at 34.4°N 64.3°W / 34.4; -64.3 – Subtropical Depression Teresa degenerates into a remnant low about 150 mi (240 km) north of Bermuda.[118]

September 26

  • 21:00 UTC (5:00 p.m. AST) at 14.2°N 50.5°W / 14.2; -50.5 – Hurricane Sam reaches peak intensity with winds of 155 mph (250 km/h) and a minimum central pressure of 929 mbar (27.43 inHg).[119] about 880 mi (1,415 km) east-southeast of the Northern Leeward Islands.[120]

September 27

Victor in the eastern tropical Atlantic on September 30
  • 15:00 UTC (11:00 a.m. AST) at 15.7°N 52.1°W / 15.7; -52.1 – Hurricane Sam weakens to Category 3 strength about 745 mi (1,200 km) east-southeast of the Northern Leeward Islands.[121]

September 28

  • 09:00 UTC (5:00 a.m. AST) at 17.2°N 53.9°W / 17.2; -53.9 – Hurricane Sam re-intensifies to Category 4 strength about 610 mi (980 km) east of the Northern Leeward Islands.[122]

September 29

October

October 1

  • 09:00 UTC (5:00 a.m. AST) at 26.6°N 61.7°W / 26.6; -61.7 – Hurricane Sam reaches its secondary peak intensity, with winds of 150 mph (240 km/h) and a minimum central pressure of 934 mbar (27.6 inHg), about 435 mi (700 km) south-southeast of Bermuda.[124]
  • 12:00 UTC (8:00 a.m. AST) at 11.4°N 33.0°W / 11.4; -33.0 – Tropical Storm Victor reaches peak intensity with maximum sustained winds of 65 mph (100 km/h) and a minimum central pressure of 997 mbar (29.4 inHg), about 690 mi (1,110 km) west-southwest of the Cabo Verde Islands.[123]

October 2

October 3

October 4

  • 12:00 UTC (8:00 a.m. AST) at 17.8°N 43.1°W / 17.8; -43.1 – Tropical Depression Victor degenerates into a trough more than 1,380 mi (2,220 km) west of the Cabo Verde Islands, and later dissipates.[123]
  • 21:00 UTC (9:00 p.m. GMT) at 45.1°N 42.5°W / 45.1; -42.5 – Hurricane Sam weakens to Category 1 strength about 520 mi (840 km) east of Cape Race, Newfoundland.[127]

October 5

  • 09:00 UTC (9:00 a.m. GMT) at 51.0°N 39.4°W / 51.0; -39.4 – Hurricane Sam transitions to a post-tropical cyclone about 690 mi (1110 km) east-northeast of Cape Race, Newfoundland.[128]

October 31

November

November 1

November 7

November 30

  • The 2021 Atlantic hurricane season officially ends.[3]

See also
  •  Tropical cyclones portal

Notes
  1. An average Atlantic hurricane season, as defined by the National Oceanic and Atmospheric Administration, has 12 tropical storms, six hurricanes and two major hurricanes.[1]
  2. Hurricanes reaching Category 3 (111 miles per hour (179 km/h)) and higher on the 5-level Saffir–Simpson wind speed scale are considered major hurricanes.[4]
  3. Due to the threat the developing system posed to the Gulf Coast of the United States, the National Hurricane Center initiated advisories it, designating it Potential Tropical Cyclone Three at 21:00 UTC (4:00 p.m. CDT) on June 17.[13]
  4. Due to the threat the developing system posed to the countries and territories in the Lesser Antilles, the National Hurricane Center initiated advisories it, designating it Potential Tropical Cyclone Five at 21:00 UTC (5:00 p.m. AST) on June 30.[20]
  5. Due to the threat the developing system posed to the countries and territories in the Lesser Antilles, the National Hurricane Center initiated advisories it, designating it Potential Tropical Cyclone Six at 21:00 UTC (5:00 p.m. AST) on August 9. [31]
  6. Due to the threat the developing system posed to the countries and territories in the Leeward Islands, the National Hurricane Center initiated advisories on it, designating it Potential Tropical Cyclone Seven at 15:00 UTC (11:00 a.m. AST) on August 12.[33]
  7. The remnants of Grace emerged offshore of the Pacific coast of west-central Mexico, where they reorganized as Tropical Storm Marty on August 23.[51][52]
  8. The National Hurricane Center monitored Odette's remnants for possible tropical transition from September 19 to September 24. Though the cyclone did lose its frontal features, it never produced a sufficient amount of deep convection to be considered a tropical or subtropical cyclone again.[99]

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