Timeline of the 2011 Pacific hurricane season

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First system formedJune 7, 2011
Last system dissipatedNovember 25, 2011
NameDora
Maximum winds155 mph (250 km/h)
(1-minute sustained)
Timeline of the
2011 Pacific hurricane season
A map of the Pacific Ocean depicting the tracks of the 13 tropical cyclones that formed in 2011.
Season summary map
Season boundaries
First system formedJune 7, 2011
Last system dissipatedNovember 25, 2011
Strongest system
NameDora
Maximum winds155 mph (250 km/h)
(1-minute sustained)
Lowest pressure929 mbar (hPa; 27.43 inHg)
Longest lasting system
NameIrwin
Duration10.75 days
Storm articles
Other years
2009, 2010, 2011, 2012, 2013

The 2011 Pacific hurricane season consisted of the events that occurred in the annual cycle of tropical cyclone formation over the Pacific Ocean north of the equator and east of the International Date Line. The official bounds of each Pacific hurricane season are dates that conventionally delineate the period each year during which tropical cyclones tend to form in the basin according to the National Hurricane Center (NHC), beginning on May 15 in the Eastern Pacific proper (east of 140°W) and June 1 in the Central Pacific (140°W to the International Date Line), and ending on November 30 in both areas. However, tropical cyclogenesis is possible at any time of year.[1] The season generated eleven tropical storms, which is below the 1991–2020 average of fifteen.[1] However, all but one became hurricanes and six further strengthened into major hurricanes,[nb 1] eclipsing the 1991–2020 averages of eight hurricanes and four major hurricanes.[1] There were also two tropical depressions that remained below tropical storm status. The first system, Hurricane Adrian, formed on June 7; the final, Hurricane Kenneth, was the latest in a calendar year to exist east of 140°W since 1983, dissipating on November 25.[2]

Several tropical cyclones impacted land during the 2011 season. The deadliest was Tropical Depression Twelve-E, which was part of a large area of torrential rains over Central America in mid-October. Widespread and destructive flooding and mudslides occurred in southeastern Mexico and Guatemala; at least thirty-six fatalities were directly attributed to the tropical depression itself, with many more in Central America being blamed on the overall weather system.[nb 2] On the same day that Twelve-E made landfall, Hurricane Jova came ashore further to the west, in the Mexican state of Jalisco, at Category 2 strength; high winds and heavy rains killed nine people[7] and caused at least MX$3.164 billion (US$254.3 million) in losses.[nb 3] Hurricane Beatriz in June claimed four lives when it passed a short distance off the Mexican state of Colima, producing strong winds and locally significant flooding on land.[10] Hurricanes Adrian in early June, Dora in July, and Hilary in late September all threatened or brushed the Pacific coast of Mexico but only caused minor peripheral effects.[11][12][13]

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 and the Central Pacific 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.[14] The NHC uses both UTC and the time zone where the center of the tropical cyclone is currently located. Prior to 2015, two time zones were utilized in the Eastern Pacific basin: Pacific east of 140°W, and Hawaii−Aleutian from 140°W to the International Date Line.[15][16] 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.

May

Tropical Depression Twelve-E (2011)Hurricane Jova (2011)Hurricane Hilary (2011)Hurricane Dora (2011)Hurricane Beatriz (2011)Hurricane Adrian (2011)Saffir–Simpson scale

May 15

  • The 2011 East Pacific hurricane season officially begins.[1]

June

June 1

  • The 2011 Central Pacific hurricane season officially begins.[1]

June 7

A map of the path of a hurricane off the Pacific coast of Mexico, generally moving to the west-northwest throughout its duration
Track map of Hurricane Adrian

June 8

June 9

June 10

A photograph of a powerful hurricane off the Pacific coast of Mexico
Satellite image of Hurricane Adrian near peak intensity early on June 10

June 11

June 12

June 19

June 20

June 21

A photograph of a hurricane very close to the Pacific coast of Mexico. Its convection is fragmented and lopsided, hinting that it is about to drastically weaken.
Short-wave infrared satellite image of Hurricane Beatriz making its closest approach to Mexico early on June 21

June 22

July

July 7

July 8

July 9

A map of the path of a hurricane heading west-northwestward away from the Pacific coast of Mexico
Track map of Hurricane Calvin

July 10

July 18

A map of the path of a hurricane off the Pacific coasts of Central America and Mexico, moving generally northwestward but arcing slightly inward toward the shoreline
Track map of Hurricane Dora

July 19

July 20

July 21

A photograph of a powerful hurricane off the Pacific coast of Mexico. There is slightly less convection and cloud cover in the top-right quadrant of the storm compared to the other three quadrants.
Satellite image of Hurricane Dora at peak intensity on July 21

July 22

July 24

July 25

July 31

A map of the path of a hurricane well off the Pacific coast of Mexico, heading generally west-northwestward for its entire life
Track map of Hurricane Eugene

August

August 1

August 2

August 3

A photograph of a powerful hurricane over the open Pacific Ocean, with long rainbands extending to the south and southwest
Satellite image of Hurricane Eugene at peak intensity late on August 3

August 4

August 5

August 6

August 15

August 16

A photograph of a tropical storm over the Eastern Pacific Ocean. It has tightly-wound spiral bands, but the convection near the center is broken. A large arc of high clouds is fanning out to the west, north, and northeast of the storm.
Satellite image of Tropical Storm Fernanda late on August 17

August 17

August 18

August 19

A map of the path of a hurricane that moves west-northwestward off the Pacific coast of, and away from, Mexico
Track map of Hurricane Greg

August 20

August 21

August 31

A photograph of a tropical depression over southwestern Mexico
Satellite image of Tropical Depression Eight-E shortly after landfall on August 31

September

September 1

September 21

September 22

September 23

A photograph of a powerful hurricane just off the Pacific coast of Mexico, with some of its northern rainbands spreading over land. The hurricane has an oblong shape, oriented from the lower-left to the upper-right.
Satellite image of Hurricane Hilary at peak intensity late on September 23

September 25

September 26

September 27

September 28

A map of the path of a hurricane over the Eastern Pacific Ocean. It begins by moving west-northwestward closely parallel the coast of Mexico; it then shifts westward out to sea, before turning to the northwest later in its life.
Track map of Hurricane Hilary

September 29

September 30

October

October 6

A map of the erratic path of a hurricane over the Eastern Pacific Ocean. First it moves to the west-northwest, then to the east before turning northeastward, and finally a sharp turn to the south.
A map of the path of a hurricane over the Eastern Pacific Ocean. It begins by moving northwestward, parallel to the coast of Mexico; it eventually turns first to the east, and then north-northeastward to a landfall on the central Mexican coast.
Track maps of hurricanes Irwin (top) and Jova (bottom), which developed within six hours of each other

October 7

October 8

October 10

A photograph of a powerful hurricane off the Pacific coast of Mexico, approaching landfall. A thick rainband curves around the hurricane to its north and is beginning to spread over land, while a long arc of thin, high clouds is fanning out to the southeast, southwest, and northwest.
Satellite image of Hurricane Jova near peak intensity late on October 10

October 11

October 12

A photograph of a tropical depression over southeastern Mexico and western Guatemala
Satellite image of Tropical Depression Twelve-E just after landfall on October 12

October 13

October 15

October 16

November

A map of the bumpy but generally westward path of a hurricane off the Pacific coast of Mexico
Track map of Hurricane Kenneth

November 19

November 20

November 21

November 22

A photograph of a powerful hurricane over the Eastern Pacific Ocean. It has a clear eye surrounded by a small but nearly axisymmetrical area of deep convection. A large area of high clouds is fanning out to the north and west of the hurricane, with a pronounced band spiraling out to the south and southwest. A small and thin area of convection, oriented north to south, is to the right of Kenneth.
Satellite image of Hurricane Kenneth near peak intensity on November 22

November 23

November 25

November 30

  • The 2011 Pacific hurricane season officially ends.[1]

Notes

See also

References

External links

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