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Revision as of 16:21, 20 May 2012
| 2012 Pacific hurricane season | |
|---|---|
 Season summary map | |
| Seasonal boundaries | |
| First system formed | May 14, 2012 |
| Last system dissipated | Season still active |
| Strongest storm | |
| Name | Aletta |
| • Maximum winds | 50 mph (85 km/h) |
| • Lowest pressure | 1000 mbar (hPa; 29.53 inHg) |
| Seasonal statistics | |
| Total depressions | 1 |
| Total storms | 1 |
| Hurricanes | 0 |
| Major hurricanes (Cat. 3+) | 0 |
| Total fatalities | Unknown |
| Total damage | Unknown |
| Related article | |
| Pacific hurricane seasons 2010, 2011, 2012, Post-2012 | |
The 2012 Pacific hurricane season is an event in the annual cycle of tropical cyclone formation. The season was scheduled to officially start on May 15, 2012 in the Eastern Pacific, although Tropical Storm Aletta developed a day prior. The season is scheduled to begin on June 1, 2012 in the Central Pacific, and the entire season will end on November 30, 2012. These dates conventionally delimit the period of each year when most tropical cyclones form in the Pacific basin.
Seasonal forecasts
| Source | Date | Named storms |
Hurricanes | Major hurricanes | |
| Average (1971–2006) | 15.3 | 8.8 | 4.2 | ||
| Record high activity | 28 | 16 (tie) | 10 | ||
| Record low activity | 8 (tie) | 3 | 0† (tie) | ||
| ––––––––––––––––––––––––––––––––––––––––––––––––––––––– | |||||
| 1 | 0 | 0 | |||
| *† Most recent of several such occurrences. (See all) | |||||
Storms
Tropical Storm Aletta
| Tropical storm (SSHWS) | |
  | |
| Duration | May 14 – May 19 |
|---|---|
| Peak intensity | 50 mph (85 km/h) (1-min); 1000 mbar (hPa) |
On May 12, a tropical disturbance formed about 550 miles (890 km) south-southwest of Acapulco, Mexico. The disturbance quickly moved northwest before becoming stationary, at which time it began to strengthen rapidly. It is estimated that by early on May 14, the disturbance intensified into Tropical Depression One-E. The depression formed one day before the official start of the 2012 Pacific hurricane season; it was the first occasion of a pre-season tropical cyclone since Tropical Storm One-E developed on May 13, 1996. Late on May 14, the National Hurricane Center upgraded the depression to Tropical Storm Aletta. On May 16, Tropical Storm Aletta reached its peak intensity of 50 mph (85 km/h), with a minimum low pressure of 1000 mbars. Later on May 16, Tropical Storm Aletta began to enter unfavorable environmental conditions, with increasing wind shear and dry air, which weakened the storm to a 40 mph (65 km/h) tropical storm. Very late on May 16, the National Hurricane Center downgraded Aletta to a tropical depression, as the system began losing its convection after turning to the west-northwest. On May 17, Tropical Depression Aletta lost most of its convection, as it turned to the northwest. Late on May 17, Aletta regained much of its convection, as it turned northward. On May 18, Aletta lost all of its western and southern convection, due to winds shear as the storm turned northeastward, and continued to weaken. Aletta became post-tropical the next day, as it turned to the east. Late on May 19, the remnant low of Aletta dissipated completely.
Timeline of recent events
Main article: Timeline of the 2012 Pacific hurricane season
Storm names
The following names will be used for named storms that form in the Eastern Pacific in 2012. Retired names, if any, will be announced by the World Meteorological Organization in the spring of 2013. The names not retired from this list will be used again in the 2018 season. This is the same list used in the 2006 season.
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The Central Pacific season originates around the islands of Hawaii. There are several names that are in four lists; the next four names to be used are shown below.
- Pewa (unused)
- Unala (unused)
- Wali (unused)
- Ana (unused)
Season effects
This is a table of all of the storms in the 2012 Pacific hurricane season. It includes their durations, peak intensities, names, landfall(s), damages, and death totals. Deaths in parentheses are additional and indirect (an example of an indirect death would be a traffic accident), but are still storm-related. Damage and deaths include totals while the storm was extratropical, a wave, or a low. All of the damage figures are in 2012 USD.
| Saffir–Simpson scale | ||||||
| TD | TS | C1 | C2 | C3 | C4 | C5 |
| Storm name |
Dates active | Storm category at peak intensity |
Max 1-min wind mph (km/h) |
Min. press. (mbar) |
Areas affected | Damage (USD) |
Deaths | Ref(s) | ||
|---|---|---|---|---|---|---|---|---|---|---|
| Aletta | May 14 – May 19 | Tropical storm | 50 (85) | 1000 | None | None | None | |||
| Season aggregates | ||||||||||
| 1 systems | May 14 – Currently active | 50 mph (85 km/h) | 1000 | 0 | 0 | |||||
Accumulated Cyclone Energy (ACE)
| ACE (10kt²) (Source) — Storm: | |||||
|---|---|---|---|---|---|
| 1 | 1.18 | Aletta | |||
| Total: 1.18 | |||||
The table on the right shows the ACE for each storm in the season. Broadly speaking, the ACE is a measure of the power of a hurricane multiplied by the length of time it existed, so storms that last a long time, as well as particularly strong hurricanes, have high ACEs. ACE is calculated for only full advisories on specifically tropical systems reaching or exceeding wind speeds of 34 knots (39 mph, 63 km/h), or tropical storm strength. Accordingly, tropical depressions are not included here. The ACE also does not include subtropical storms. Later the NHC reexamines the data, and produces a final report on each storm, which can lead to the ACE for a storm being revised either upward or downward. Until the final reports are issued, ACEs are, therefore, provisional.
The figures in parentheses are for storms in the Central Pacific basin west of 140°W; those not in parentheses are for the Eastern Pacific basin.
See also
- List of Pacific hurricanes
- List of Pacific hurricane seasons
- 2012 Atlantic hurricane season
- 2012 Pacific typhoon season
- 2012 North Indian Ocean cyclone season
- South-West Indian Ocean cyclone seasons: 2011–12
- Australian region cyclone seasons: 2011–12, 2012–13
- South Pacific cyclone seasons: 2011–12, 2012–13
References
- John Beven II (May 12, 2012). "Special Tropical Weather Outlook". National Oceanic and Atmospheric Administration. National Hurricane Center. Retrieved May 15, 2012.
- Todd Kimberlain (May 14, 2012). "Tropical Depression One-E Discussion Number One". National Oceanic and Atmospheric Administration. National Hurricane Center. Retrieved May 15, 2012.
- Richard Pasch (May 15, 2012). "Tropical Storm Aletta Discussion Number One". National Oceanic and Atmospheric Administration. National Hurricane Center. Retrieved May 15, 2012.
- http://www.nhc.noaa.gov/archive/gtwo/epac/201205170831/index.php?basin=epac¤t_issuance=201205170831
- http://www.nhc.noaa.gov/archive/gtwo/epac/201205171434/index.php?basin=epac¤t_issuance=201205171434
- http://www.nhc.noaa.gov/archive/gtwo/epac/201205172335/index.php?basin=epac¤t_issuance=201205172335
- http://www.nhc.noaa.gov/archive/gtwo/epac/201205192351/index.php?basin=epac¤t_issuance=201205192351
External links
- National Hurricane Center Website
- National Hurricane Center's Eastern Pacific Tropical Weather Outlook
| Tropical cyclones of the 2012 Pacific hurricane season | ||
|---|---|---|
| TSAletta 3Bud 2Carlotta 3Daniel 4Emilia 2Fabio 1Gilma TSHector 1Ileana TSJohn TSKristy 1Lane 3Miriam TSNorman TSOlivia 3Paul TSRosa | |
Template:2010-2019 Pacific hurricane seasons
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