Jump to content

2018 Pacific hurricane season: Difference between revisions

From Wikipedia, the free encyclopedia
Browse history interactively
← Previous editNext edit →
Content deleted Content added
VisualWikitext
Olo72 (talk | contribs)
94 edits
No edit summary
Line 146: Line 146:
| Track=Aletta 2018 track.png
| Track=Aletta 2018 track.png
| Formed=June 6
| Formed=June 6
| Dissipated=June 11
| Dissipated=June 11
(Remnant after June 11)
| 1-min winds=120
| 1-min winds=120
| Pressure=943
| Pressure=943

Revision as of 19:51, 13 June 2018

2018 Pacific hurricane season
Season summary map
Seasonal boundaries
First system formedMay 10, 2018
Last system dissipatedSeason ongoing
Strongest storm
NameAletta
 • Maximum winds140 mph (220 km/h)
(1-minute sustained)
 • Lowest pressure943 mbar (hPa; 27.85 inHg)
Seasonal statistics
Total depressions3
Total storms2
Hurricanes2
Major hurricanes
(Cat. 3+)		2
Total fatalitiesNone
Total damageNone
Related articles
Pacific hurricane seasons
2016, 2017, 2018, 2019, 2020

The 2018 Pacific hurricane season is an ongoing event in the annual cycle of tropical cyclone formation. The season officially began on May 15 in the eastern Pacific and on June 1 in the central Pacific; they will both end on November 30. These dates conventionally delimit the period of each year when most tropical cyclones form in the Pacific basin. However, the formation of tropical cyclones is possible at any time of the year, as illustrated when the first tropical depression formed on May 10. The first named storm of the season, Hurricane Aletta, formed on June 6.

Seasonal forecasts

Record Named
storms 		Hurricanes Major
hurricanes 		Ref
Average (1981-2010): 15.4 7.6 3.2 [1]
Record high activity: 1992: 27 2015: 16 2015: 11 [2]
Record low activity: 2010: 8 2010: 3 2003: 0 [2]
Date Source Named
storms 		Hurricanes Major
hurricanes 		Ref
May 24, 2018 NOAA 14–20 7–12 3–7 [3]
May 25, 2018 SMN 18 6 4 [4]
Area Named
storms		 Hurricanes Major
hurricanes		 Ref
Actual activity: EPAC 2 2 2
Actual activity: CPAC 0 0 0
Actual activity: 2 2 2

On May 24, 2018, the National Oceanic and Atmospheric Administration released its annual forecast, predicting a 80% chance of a near- to above-average season in both the Eastern and Central Pacific basins, with a total of 14–20 named storms, 7–12 hurricanes, and 3–7 major hurricanes.[3] On May 25, the Servicio Meteorológico Nacional (SMN) issued its first forecast for the season, predicting a total of 18 named storms, 6 hurricanes, and 4 major hurricanes to develop.[4]

Seasonal summary

Main article: Timeline of the 2018 Pacific hurricane season
Saffir–Simpson scale

The Accumulated Cyclone Energy index for the 2018 Pacific hurricane season, as of 15:00 UTC June 12, is 20.0825 units.[nb 1]

The season began five days before the official start on May 15, with the first system, Tropical Depression One-E, forming on May 10. One-E dissipated two days later without intensifying further. This marks the third time in a row that a season begins with an off-season tropical cyclone. The first named storm, Hurricane Aletta, formed on June 6 and eventually became the first major hurricane of the season. Hurricane Bud formed a few days later becoming the second major hurricane of the season.

In the Central Pacific, the Pacific hurricane season officially began on June 1. The season for the entire Northeast Pacific basin will officially end on November 30.

Systems

Tropical Depression One-E

Tropical depression (SSHWS)
 
DurationMay 10 – May 12
Peak intensity35 mph (55 km/h) (1-min);
1006 mbar (hPa)
See also: List of off-season Pacific hurricanes

In early May, a westward-tracking trough or tropical wave embedded in the monsoon trough interacted with a convectively-coupled Kelvin wave. This interaction led to a large area of shower and thunderstorm activity well southwest of Mexico,[5] which the National Hurricane Center began monitoring for tropical cyclone formation on May 7.[6] The disturbance organized over the next 48 hours but lacked a well-defined center needed for classification;[7] by late on May 9, environmental conditions were becoming less favorable for development.[8] In spite of this, an increase in convection and formation of a well-defined circulation led to the designation of the season's first tropical depression at 21:00 UTC on May 10.[9] The system failed to intensify after formation and, owing to strong westerly wind shear, ultimately degenerated into a remnant low by 03:00 UTC on May 12.[10]

Hurricane Aletta

Category 4 hurricane (SSHWS)
 
DurationJune 6 – June 11 (Remnant after June 11)
Peak intensity140 mph (220 km/h) (1-min);
943 mbar (hPa)

On May 31, the NHC noted the potential for tropical development well south of Mexico over subsequent days.[11] A large area of disturbed weather formed late on June 2,[12] steadily organizing into the season's second tropical depression by 03:00 UTC on June 6 as a prominent spiral band wrapped into its center.[13] An increase in deep convection signified its development into Tropical Storm Aletta six hours later.[14] The newly-formed cyclone moved generally west-northwest after formation, slow to intensify as dry air intrusion and moderate southwesterly shear affected its cloud pattern.[15] Starting on June 7, however, the center became better located within deep convection and Aletta began a period of explosive intensification that saw its winds double from 70 mph (110 km/h) to 140 mph (220 km/h) over a span of 24 hours.[16] Strong wind shear and cooler ocean temperatures prompted rapid weakening soon thereafter.[17] Late on June 11, Aletta degenerated into a remnant low over the open Pacific.[18]

Hurricane Bud

Tropical Storm Bud
Current storm status
Tropical storm (1-min mean)
Satellite image
Forecast map
As of:12:00 p.m. MDT (18:00 UTC) June 13
Location:19°36′N 108°48′W / 19.6°N 108.8°W / 19.6; -108.8 (Tropical Storm Bud) ± 15 nm
About 240 mi (385 km) SSE of Cabo San Lucas
Sustained winds:50 kt (60 mph; 95 km/h) (1-min mean)
gusting to 60 kt (70 mph; 110 km/h)
Pressure:994 mbar (hPa; 29.35 inHg)
Movement:NNW at 4 kn (5 mph; 7 km/h)
See more detailed information.
Main article: Hurricane Bud (2018)

On June 4, the National Hurricane Center (NHC) began monitoring an area of low pressure that was expected to form a few hundred miles south of the Gulf of Tehuantepec.[19] A broad area of disturbed weather formed on June 5 in association with a westward-moving tropical wave.[20] Gradual organization occurred as the wave tracked generally westward across the eastern Pacific Ocean. On June 9, the disturbance developed a well-defined surface circulation, leading to the classification of a tropical depression at 21:00 UTC.[21] Six hours later, the depression strengthened into Tropical Storm Bud,[22] and within 12 hours, a Category 1 hurricane. Bud eventually strengthened into a major hurricane on June 11 at 12:00 UTC.

Current storm information

As of 12:00 p.m. MDT (18:00 UTC) June 13, Tropical Storm Bud is located within 15 nautical miles of 19°36′N 108°48′W / 19.6°N 108.8°W / 19.6; -108.8 (Bud), about 240 miles (385 km) south-southeast of Cabo San Lucas. Maximum sustained winds are 50 knots (60 mph; 95 km/h), with gusts up to 60 knots (70 mph; 110 km/h). The minimum barometric pressure is 994 mbar (hPa; 29.35 inHg), and the system is moving north-northwest at 4 knots (5 mph; 7 km/h). Tropical storm-force winds extend outward up to 90 miles (150 km) from the center.

For latest official information, see:

Watches and warnings

Template:HurricaneWarningsTable

Storm names

The following list of names is being used for named storms that form in the northeastern Pacific Ocean during 2018. Retired names, if any, will be announced by the World Meteorological Organization in the spring of 2019. The names not retired from this list will be used again in the 2024 season.[23] This is the same list used in the 2012 season.

  • Aletta
  • Bud (active)
  • Carlotta (unused)
  • Daniel (unused)
  • Emilia (unused)
  • Fabio (unused)
  • Gilma (unused)
  • Hector (unused)
  • Ileana (unused)
  • John (unused)
  • Kristy (unused)
  • Lane (unused)
  • Miriam (unused)
  • Norman (unused)
  • Olivia (unused)
  • Paul (unused)
  • Rosa (unused)
  • Sergio (unused)
  • Tara (unused)
  • Vicente (unused)
  • Willa (unused)
  • Xavier (unused)
  • Yolanda (unused)
  • Zeke (unused)

For storms that form in the Central Pacific Hurricane Center's area of responsibility, encompassing the area between 140 degrees west and the International Date Line, all names are used in a series of four rotating lists.[24] The next four names that will be slated for use in 2018 are shown below.

  • Walaka (unused)
  • Akoni (unused)
  • Ema (unused)
  • Hone (unused)

Season effects

This is a table of all the storms that have formed in the 2018 Pacific hurricane season. It includes their duration, names, landfall(s), denoted in parentheses, damages, and death totals. Deaths in parentheses are additional and indirect (an example of an indirect death would be a traffic accident), but were still related to that storm. Damage and deaths include totals while the storm was extratropical, a tropical wave, or a low, and all the damage figures are in 2018 USD.

Saffir–Simpson scale
TD TS C1 C2 C3 C4 C5
2018 Pacific hurricane season statistics
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)
One-E May 10 – 12 Tropical depression 35 (55) 1006 None None None
Aletta June 6 – 11 Category 4 hurricane 140 (220) 943 Revillagigedo Islands None None
Bud June 9 – Present Category 4 hurricane 130 (215) 948 Western Mexico Unknown None
Season aggregates
3 systems May 10 – present   140 (220) 943 None None  

See also

Notes

  1. ^ The totals represent the sum of the squares for every (sub)tropical storm's intensity of over 33 knots (38 mph, 61 km/h), divided by 10,000. Calculations are provided at Talk:2018 Pacific hurricane season/ACE calcs.

References

  1. ^ "Background Information: East Pacific Hurricane Season". Climate Prediction Center. College Park, Maryland: National Oceanic and Atmospheric Administration. May 22, 2014. Retrieved May 29, 2014.
  2. ^ a b National Hurricane Center; Hurricane Research Division; Central Pacific Hurricane Center (April 26, 2024). "The Northeast and North Central Pacific hurricane database 1949–2023". United States National Oceanic and Atmospheric Administration's National Weather Service. Archived from the original on May 29, 2024. A guide on how to read the database is available here. Public Domain This article incorporates text from this source, which is in the public domain.
  3. ^ a b "Forecasters predict a near- or above-normal 2018 hurricane season". National Oceanic and Atmospheric Administration. May 24, 2018.
  4. ^ a b http://smn.cna.gob.mx/es/ciclones-tropicales/temporada-de-ciclones-2018
  5. ^ Forecaster AL (May 6, 2018). Tropical Weather Discussion valid 1416 UTC Sun May 6 2018 (Report). Miami, Florida: National Hurricane Center. Retrieved May 10, 2018.
  6. ^ Lixion A. Avila (May 7, 2018). Special Graphical Tropical Weather Outlook (Report). Miami, Florida: National Hurricane Center. Retrieved May 10, 2018.
  7. ^ Stacy R. Stewart (May 9, 2018). Special Graphical Tropical Weather Outlook (Report). Miami, Florida: National Hurricane Center. Retrieved May 10, 2018.
  8. ^ John L. Beven II (May 9, 2018). Special Graphical Tropical Weather Outlook (Report). Miami, Florida: National Hurricane Center. Retrieved May 10, 2018.
  9. ^ Lixion A. Avila (May 10, 2018). Tropical Depression One-E Discussion Number 1 (Report). Miami, Florida: National Hurricane Center. Retrieved May 10, 2018.
  10. ^ John L. Beven II (May 11, 2018). Post-Tropical Cyclone One-E Discussion Number 6 (Report). Miami, Florida: National Hurricane Center. Retrieved May 11, 2018.
  11. ^ Eric S. Blake (May 31, 2018). Graphical Tropical Weather Outlook (Report). Miami, Florida: National Hurricane Center. Retrieved June 5, 2018.
  12. ^ Eric S. Blake (June 2, 2018). Graphical Tropical Weather Outlook (Report). Miami, Florida: National Hurricane Center. Retrieved June 5, 2018.
  13. ^ Robbie J. Berg (June 5, 2018). Tropical Depression Two-E Discussion Number 1 (Report). Miami, Florida: National Hurricane Center. Retrieved June 5, 2018.
  14. ^ Lixion A. Avila (June 6, 2018). Tropical Storm Aletta Discussion Number 2 (Report). Miami, Florida: National Hurricane Center. Retrieved June 6, 2018.
  15. ^ Robbie J. Berg (June 6, 2018). Tropical Storm Aletta Discussion Number 5 (Report). Miami, Florida: National Hurricane Center. Retrieved June 7, 2018.
  16. ^ David P. Zelinsky (June 8, 2018). Hurricane Aletta Discussion Number 12 (Report). Miami, Florida: National Hurricane Center. Retrieved June 8, 2018.
  17. ^ Robbie J. Berg (June 9, 2018). Tropical Storm Aletta Discussion Number 18 (Report). Miami, Florida: National Hurricane Center. Retrieved June 10, 2018.
  18. ^ David P. Zelinsky (June 11, 2018). "Hurricane Aletta Advisory Number 25". Miami, Florida: National Hurricane Center. Retrieved June 11, 2018.
  19. ^ John P. Cangialosi (June 4, 2018). "Graphical Tropical Weather Outlook". National Hurricane Center. Retrieved June 9, 2018.
  20. ^ Robbie Berg (June 5, 2018). "Graphical Tropical Weather Outlook". National Hurricane Center. Retrieved June 9, 2018.
  21. ^ David Zelinsky (June 9, 2018). "Tropical Depression Three-E Advisory Number 1". National Hurricane Center. Retrieved June 9, 2018.
  22. ^ Lixion Avila (June 10, 2018). "Tropical Storm Bud Advisory Number 2". National Hurricane Center. Retrieved June 10, 2018.
  23. ^ "Tropical Cyclone Names". National Hurricane Center. National Oceanic and Atmospheric Administration. 2013-04-11. Archived from the original on May 8, 2013. Retrieved May 8, 2013.
  24. ^ "Pacific Tropical Cyclone Names 2016-2021". Central Pacific Hurricane Center. National Oceanic and Atmospheric Administration. May 12, 2016. Archived from the original (PHP) on December 30, 2016. {{cite web}}: Unknown parameter |deadurl= ignored (|url-status= suggested) (help)
Wikimedia Commons has media related to 2018 Pacific hurricane season.
Retrieved from "https://en.wikipedia.org/w/index.php?title=2018_Pacific_hurricane_season&oldid=845738319"