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Timeline of the 2021 Pacific hurricane season

The 2021 Pacific hurricane season was a moderately active hurricane season, with above-average tropical activity in terms of named storms, but featured below-average activity in terms of major hurricanes. It is the first season to have at least five systems make landfall in Mexico, the most since 2018. It was also the second consecutive season in which no tropical cyclones formed in the Central Pacific (between 140°W and the International Date Line). The season officially began on May 15 in the Eastern Pacific (east of 140°W longitude), and on June 1 in the Central Pacific; both ended on November 30. These dates historically describe the period each year when most tropical cyclones form in the eastern and central Pacific and are adopted by convention. However, the formation of tropical cyclones is possible at any time of the year, as illustrated this year by the formation of Tropical Storm Andres on May 9. This was the earliest forming tropical storm on record in the Eastern Pacific. The season effectively ended with the dissipation of Tropical Storm Terry, on November 10.

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) are: Central, Mountain, Pacific and Hawaii. 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.

Timeline

May

May 9

  • 06:00 UTC (12:00 a.m. MDT) at Tropical Depression One-E forms from a disturbance about south-southeast of Socorro Island.
  • 12:00 UTC (6:00 a.m. MDT) at – Tropical Depression One-E strengthens into Tropical Storm Andres, and subsequently reaches peak intensity with winds of and a central pressure of .

May 10

  • 18:00 UTC (6:00 p.m. MDT) at – Tropical Storm Andres weakens into a tropical depression about south of the southern tip of Baja California due to strong wind shear.

May 11

  • 06:00 UTC (12:00 a.m. MDT) at – Tropical Depression Andres transitions into a post-tropical cyclone about southwest of Socorro Island due to all thunderstorm activity disappearing.

May 15

  • The Eastern Pacific hurricane season officially begins.

May 30

  • 18:00 UTC (12:00 p.m. CDT) at – Tropical Depression Two-E forms about southwest of Acapulco, Mexico from a flare up of deep convection.

May 31

  • 12:00 UTC (6:00 a.m. MDT) at – Tropical Depression Two-E intensifies into Tropical Storm Blanca because of a widespread flare up of convection about south-southwest of Manzanillo, Mexico.

June

June 1

  • The Central Pacific hurricane season officially begins.
  • 06:00 UTC (12:00 a.m. MDT) at – Tropical Storm Blanca reaches its peak intensity with maximum sustained winds of and a central pressure of .

June 2

  • 18:00 UTC (12:00 p.m. MDT) at – Tropical Storm Blanca weakens into a tropical depression roughly south-southwest of Socorro Island.

June 4

  • 00:00 UTC (5:00 p.m. PDT, June 3) at – Tropical Depression Blanca transitions into a post-tropical cyclone about south-southwest of the southern tip of Baja California after losing all deep convection.

June 12

  • 12:00 UTC (5:00 a.m. PDT) at Tropical Depression Three-E forms about southwest of the southern tip of Baja California due to improved deep convection.
  • 18:00 UTC (11:00 a.m. PDT) at Tropical Depression Three-E strengthens into Tropical Storm Carlos a mere 6 hours after becoming a tropical depression.

June 13

  • 06:00 UTC (11:00 p.m. PDT June 12) at Tropical Storm Carlos reaches peak intensity with winds of and a minimum central pressure of

June 14

  • 18:00 UTC (11:00 a.m. PDT) at Tropical Storm Carlos weakens into a tropical depression about west-southwest of the southern tip of the Baja California Peninsula after losing organisation.

June 16

  • 12:00 UTC (5:00 a.m. PDT) at Tropical Depression Carlos transitions into a tropical low about west-southwest of the southern tip of the Baja California Peninsula after losing deep convection.

June 18

  • 06:00 UTC (1:00 a.m. CDT) at Tropical Depression Four-E forms about south-southwest of Acapulco, Mexico.
  • 12:00 UTC (7:00 a.m. CDT) at – Tropical Depression Four-E strengthens into Tropical Storm Dolores promptly after forming.

June 19

  • 12:00 UTC (7:00 a.m. CDT) at Tropical Storm Dolores reaches its peak intensity with winds of and a minimum central pressure of
  • 15:00 UTC (10:00 a.m. CDT) at Tropical storm Dolores makes landfall near San Juan de Alima, Michoacán, Mexico with winds of about .

June 20

  • 00:00 UTC (7:00 p.m. CDT June 19) at Tropical Storm Dolores weakens into a Tropical Depression soon after making landfall.
  • 06:00 UTC (1:00 a.m. CDT) Tropical Depression Dolores dissipates soon after weakening into a tropical depression over central Mexico.

June 25

  • 06:00 UTC (1:00 am CDT) at Tropical Storm Enrique forms about south-southeast of Manzanillo, Mexico from a disturbance.

June 26

June 27

  • 18:00 UTC (12:00 p.m. MDT) at Hurricane Enrique reaches peak intensity with winds of and a minimum central pressure of .

June 28

  • 18:00 UTC (12:00 p.m. MDT) at Hurricane Enrique weakens into a tropical storm about southeast of Cabo San Lucas.

June 30

  • 12:00 UTC (6:00 a.m. MDT) at Tropical Storm Enrique weakens into a tropical depression about northeast of La Paz, Mexico.
  • 18:00 UTC (12:00 p.m. MDT) Tropical Depression Enrique dissipates into a trough of low pressure roughly north of La Paz, Mexico.

July

July 14

  • 00:00 UTC (6:00 p.m. MDT July 13) at Tropical Depression Six-E forms about southwest of the southwestern coast of Mexico.
  • 06:00 UTC (12:00 a.m. MDT) at Tropical Depression Six-E strengthens into Tropical Storm Felicia and undergoes rapid intensification.

July 15

  • 06:00 UTC (11:00 p.m. PDT July 14) at Tropical Storm Felicia strengthens into a Category 1 hurricane about southwest of the southern tip of Baja California.
  • 18:00 UTC (11:00 a.m. PDT) at Hurricane Felicia strengthens into a Category 2 hurricane about southwest of the southern tip of Baja California.

July 16

  • 06:00 UTC (11:00 p.m. PDT July 15) at Hurricane Felicia strengthens into a Category 3 hurricane about southwest of the southern tip of Baja California.
  • 18:00 UTC (8:00 a.m. HST) at Hurricane Felicia strengthens into a Category 4 hurricane about west-southwest of the southern tip of Baja California.

July 17

  • 12:00 UTC (2:00 a.m. HST) at Hurricane Felicia reaches peak intensity with winds of and a minimum central pressure of about west-southwest of the southern tip of Baja California.
  • 15:00 UTC (9:00 a.m. MDT) at Tropical Depression Seven-E forms about south of the southern tip of Baja California.
  • 21:00 UTC (3:00 p.m. MDT) at Tropical Depression Seven-E strengthens into Tropical Storm Guillermo about south-southeast of the southern tip of Baja California.

July 18

  • 18:00 UTC (8:00 a.m. HST) at Hurricane Felicia weakens into a Category 3 hurricane about west-southwest of the southern tip of Baja California.
  • 21:00 UTC (3:00 p.m. MDT) at Tropical Storm Guillermo reaches peak intensity with winds of and a minimum central pressure of about southwest of the southern tip of Baja California.

July 19

  • 00:00 UTC (2:00 p.m. HST July 18) at Hurricane Felicia weakens into a Category 2 hurricane about west-southwest of the southern tip of Baja California.
  • 06:00 UTC (8:00 p.m. HST July 18) at Hurricane Felicia weakens into a Category 1 hurricane about west-southwest of the southern tip of Baja California.
  • 18:00 UTC (8:00 a.m. HST) at Hurricane Felicia weakens into a tropical storm about east of Hilo, Hawaii.
  • 21:00 UTC (11:00 a.m. HST) at Tropical Storm Guillermo weakens into a tropical depression about west-southwest of the southern tip of Baja California.

July 20

  • 18:00 UTC (8:00 a.m. HST) at Tropical Strorm Felicia becomes a remnant low about east-southeast of Hilo, Hawaii.
  • 21:00 UTC (2:00 p.m. PDT) at Tropical Depression Guillermo transitions into a post-tropical cyclone about west-southwest of the southern tip of Baja California.

July 22

  • 18:00 UTC (8:00 a.m. HST) The remnants of Felicia dissipate.

July 30

  • 21:00 UTC (3:00 p.m. MDT) at Tropical Storm Hilda forms about south-southewest of the southern tip of Baja California.
  • 21:00 UTC (2:00 p.m. PDT) at Tropical Depression Nine-E forms about west-southwest of the southern tip of Baja California.

August

August 1

  • 03:00 UTC (8:00 p.m. PDT July 31) at Tropical Storm Hilda strengthens into a category 1 hurricane about southwest of the southern tip of Baja California.
  • 09:00 UTC (2:00 a.m. PDT) at Hurricane Hilda reaches peak intensity with winds of and a minimum central pressure of about southwest of the southern tip of Baja California.
  • 09:00 UTC (11:00 p.m. HST July 31) at Tropical Depression Nine-E transitions into a post-tropical cyclone about west-southwest of the southern tip of Baja California.
  • 21:00 UTC (3:00 p.m. MDT) at Tropical Depression Ten-E forms about south-southwest of the southern tip of Baja California.

August 2

  • 15:00 UTC (9:00 a.m. MDT) at Tropical Depression Ten-E strengthens into Tropical Storm Ignacio about southwest of the southern tip of Baja California.
  • 21:00 UTC (3:00 p.m. MDT) at Tropical Storm Ignacio reaches peak intensity with winds of and a minimum central pressure of about southwest of the southern tip of Baja California.

August 3

  • 09:00 UTC (2:00 a.m. PDT) at Hurricane Hilda weakens into a Tropical Storm about west-southwest of the southern tip of Baja California.
  • 09:00 UTC (2:00 a.m. PDT) at Tropical Storm Ignacio weakens into a Tropical Depression about west-southwest of the southern tip of Baja California.

August 4

  • 03:00 UTC (8:00 p.m. PDT August 3) at Tropical Depression Ignacio transitions into a post-tropical cyclone about west-southwest of the southern tip of Baja California.
  • 21:00 UTC (11:00 a.m. HST) at Tropical Depression Nine-E regenerates about west-southwest of the southern tip of Baja California.

August 5

  • 09:00 UTC (11:00 p.m. HST August 4) at Tropical Depression Nine-E strengthens into Tropical Storm Jimena about west-southwest of the southern tip of Baja California.
  • 15:00 UTC (5:00 a.m. HST) at Tropical Storm Jimena reaches peak intensity with winds of and a minimum central pressure of about west of the southern tip of Baja California.
  • 15:00 UTC (8:00 a.m. PDT) at Tropical Storm Hilda weakens into a tropical depression about west of the southern tip of Baja California.

August 6

  • 15:00 UTC (8:00 a.m. PDT) at Tropical Depression Hilda transitions into a post-tropical cyclone about west of the southern tip of Baja California.
  • 21:00 UTC (11:00 a.m. HST) at Tropical Storm Jimena weakens into a tropical depression about east of Hilo, Hawaii.

August 7

  • 03:00 UTC (5:00 p.m. HST August 6) at Tropical Depression Jimena transitions into a post-tropical cyclone about east of Hilo, Hawaii.
  • 15:00 UTC (10:00 a.m. CDT) at Tropical Depression Eleven-E forms about south-southwest of Manzanillo, Mexico.
  • 21:00 UTC (3:00 p.m. MDT) at Tropical Depression Eleven-E strengthens into Tropical Storm Kevin about southwest of Manzanillo, Mexico.

August 8

  • 21:00 UTC (3:00 p.m. MDT) at Tropical Storm Kevin reaches peak intensity with winds of and a minimum central pressure of about south of the southern tip of Baja California.

August 10

  • 09:00 UTC (4:00 a.m. CDT) at Tropical Depression Twelve-E forms about south-southwest of Acapulco.
  • 21:00 UTC (4:00 p.m. CDT) at Tropical Depression Twelve-E strengthens into Tropical Storm Linda about southwest of Acapulco.

August 12

  • 09:00 UTC (2:00 a.m. PDT) at Tropical Storm Kevin weakens into a tropical depression about west of the southern tip of Baja California.
  • 15:00 UTC (8:00 a.m. PDT) at Tropical Depression Kevin transitions into a post-tropical cyclone about southwest of Punta Eugenia, Mexico.
  • 15:00 UTC (9:00 a.m. MDT) at Tropical Storm Linda strengthens into a category 1 hurricane about southwest of Manzanillo, Mexico.

August 13

  • 15:00 UTC (9:00 a.m. MDT) at Hurricane Linda strengthens into a category 2 hurricane about south-southwest of the southern tip of Baja California.
  • 21:00 UTC (3:00 p.m. MDT) at Hurricane Linda strengthens into a category 3 hurricane about south-southwest of the southern tip of Baja California.

August 14

  • 15:00 UTC (8:00 a.m. PDT) at Hurricane Linda strengthens into a category 4 hurricane about southwest of the southern tip of Baja California.

August 15

  • 03:00 UTC (8:00 p.m. PDT August 14) at Hurricane Linda weakens into a category 3 hurricane about west-southwest of the southern tip 6of Baja California.
  • 21:00 UTC (11:00 a.m. HST) at Hurricane Linda weakens into a category 2 hurricane about west-southwest of the southern tip of Baja California.

August 17

  • 09:00 UTC (11:00 p.m. HST August 16) at Hurricane Linda weakens into a category 1 hurricane about west-southwest of the southern tip of Baja California.

August 18

  • 03:00 UTC (5:00 p.m. HST August 17) at Hurricane Linda re-strengthens back into a category 2 hurricane about west-southwest of the southern tip of Baja California.

August 19

  • 03:00 UTC (5:00 p.m. HST August 18) at Hurricane Linda weakens into a category 1 hurricane about east of Hilo, Hawaii.
  • 15:00 UTC (5:00 a.m. HST) at Hurricane Linda weakens into a tropical storm about east of Hilo, Hawaii.

August 20

  • 15:00 UTC (5:00 a.m. HST) at Tropical Storm Linda transitions into a post-tropical cyclone about east of Hilo, Hawaii.

August 23

  • 09:00 UTC (4:00 p.m. CDT) at Tropical Storm Marty forms about south-southwest of the southern tip of Baja California.

August 24

  • 03:00 UTC (8:00 p.m. PDT August 23) at Tropical Storm Marty reaches peak intensity with winds of and a minimum central pressure of about west-southwest of the southern tip of Baja California.
  • 15:00 UTC (8:00 a.m. PDT) at Tropical Storm Marty weakens into a tropical depression about west-southwest of the southern tip of Baja California.
  • 21:00 UTC (2:00 p.m. PDT) at Tropical Depression Marty transitions into a post-tropical cyclone about west-southwest of the southern tip of Bala California.

August 25

  • 21:00 UTC (4:00 p.m. CDT) at Tropical Depression Fourteen-E forms about south of Acapulco, Mexico.

August 26

  • 15:00 UTC (10:00 a.m. CDT) at Tropical Depression Fourteen-E strengthens into Tropical Storm Nora about south of Acapulco, Mexico.

August 28

  • 09:00 UTC (4:00 a.m. CDT) at Tropical Storm Nora strengthens into a category 1 hurricane and reaches its peak intensity about south of Cabo Corrientes.

August 29

  • 18:00 UTC (12:00 p.m. MDT) at Hurricane Nora weakens into a tropical storm about northwest of Mazatlan, Mexico.

August 30

  • 06:00 UTC (12:00 a.m. MDT) at Tropical Storm Nora weakens into a tropical depression about southeast of Los Mochis.
  • 09:00 UTC (3:00 a.m. MDT) at Tropical Depression Nora dissipates about east-southeast of Los Mochis.

September

September 7

  • 21:00 UTC (3:00 p.m. MDT) at Tropical Depression Fifteen-E forms about south-southeast of the southern tip of Baja California.

September 8

  • 15:00 UTC (9:00 a.m. MDT) at Tropical Depression Fifteen-E strengthens into Tropical Storm Olaf about west of Manzanillo, Mexico.

September 9

  • 15:00 UTC (9:00 a.m. MDT) at Tropical Storm Olaf strengthens into a Category 1 hurricane about southeast of Cabo San Lucas, Mexico.

September 10

September 11

  • 03:00 UTC (9:00 p.m. MDT, September 10) at Tropical Storm Olaf weakens into a tropical depression about west of Cabo San Lazaro, Mexico.
  • 15:00 UTC (9:00 a.m. MDT) at Tropical Depression Olaf degenerates into a remnant low about west-southwest of Cabo San Lazaro, Mexico.

October

October 10

  • 09:00 UTC (4:00 a.m. CDT) at Tropical Depression Sixteen-E forms about south-southeast of Puerto Vallarta, Mexico.
  • 21:00 UTC (4:00 p.m. CDT) at Tropical Depression Sixteen-E strengthens into Tropical Storm Pamela about south-southwest of Manzanillo, Colima.

October 12

  • 09:00 UTC (3:00 a.m. MDT) at Tropical Storm Pamela intensifies into a Category 1 hurricane about south-southwest of Mazatlán, Mexico.
  • 21:00 UTC (3:00 p.m. MDT) at Hurricane Pamela weakens to a tropical storm about southwest of Mazatlán.

October 13

  • 09:00 UTC (3:00 a.m. MDT) at Tropical Storm Pamela re-intensifies into a Category 1 hurricane about west-southwest of Mazatlán.
  • 12:00 UTC (6:00 a.m. MDT) at Hurricane Pamela makes landfall near Estación Dimas, Sinaloa, Mexico about northwest of Mazatlán.
  • 15:00 UTC (9:00 a.m. MDT) at Hurricane Pamela weakens into a tropical storm about north-northeast of Mazatlán.
  • 21:00 UTC (4:00 p.m. CDT) at Tropical Storm Pamela weakens into a tropical depression about northeast of Mazatlán.

October 14

  • 03:00 UTC (10:00 p.m. CDT, October 13) at Tropical Depression Pamela dissipates about west of Laredo, Texas.

October 22

  • 15:00 UTC (10:00 a.m. CDT) at Tropical Depression Seventeen-E forms about south-southeast of Manzanillo, Colima.
  • 21:00 UTC (4:00 p.m. CDT) at Tropical Depression Seventeen-E strengthens into Tropical Storm Rick about south of Zihuatanejo, Mexico.

October 23

  • 12:00 UTC (7:00 a.m. CDT) at Tropical Storm Rick intensifies into a Category 1 hurricane about south of Zihuatanejo.

October 25

  • 06:00 UTC (1:00 a.m. CDT) at Hurricane Rick intensifies to Category 2 status about south of Zihuatanejo, and simultaneously reaches its peak intensity with maximum sustained winds of and a central pressure of .
  • 10:00 UTC (5:00 a.m. CDT) at Hurricane Rick makes landfall about east of Lázaro Cárdenas, Mexico.
  • 15:00 UTC (10:00 a.m. CDT) at Hurricane Rick weakens to Category 1 strength about north of Lázaro Cárdenas.
  • 18:00 UTC (1:00 p.m. CDT) at Hurricane Rick weakens into a tropical storm about north of Lázaro Cárdenas.
  • 21:00 UTC (4:00 p.m. CDT) at Tropical Storm Rick weakens into a tropical depression about north of Lázaro Cárdenas.

October 26

  • 03:00 UTC (10:00 p.m. CDT, October 25) at Tropical Depression Rick dissipates about west of Guadalajara, Mexico.

November

November 4

  • 15:00 UTC (10:00 a.m. CDT) at Tropical Depression Eighteen-E forms about south of San Salvador, El Salvador.

November 7

  • 15:00 UTC (8:00 a.m. MST) at Tropical Depression Nineteen-E forms about south-southwest of the southern tip of Baja California.
  • 21:00 UTC (3:00 p.m. CST) at Tropical Depression Eighteen-E strengthens into Tropical Storm Terry about south of Manzanillo, Mexico.
  • 21:00 UTC (1:00 p.m. PST) at Tropical Depression Nineteen-E strengthens into Tropical Storm Sandra about south-southwest of the southern tip of Baja California.

November 8

  • 15:00 UTC (8:00 a.m. MST) at Tropical Storm Terry weakens into a tropical depression about south-southwest of Manzanillo, Mexico.
  • 21:00 UTC (1:00 p.m. PST) at Tropical Storm Sandra weakens into a tropical depression about southwest of the southern tip of Baja California.

November 9

  • 21:00 UTC (1:00 p.m. PST) at Tropical Depression Sandra dissipates about southwest of the southern tip of Baja California.

November 10

  • 21:00 UTC (1:00 p.m. PST) at Tropical Depression Terry dissipates about southwest of the southern tip of Baja California.

November 30

  • The Eastern and Central Pacific hurricane seasons officially end.

See also

Notes

References

External links