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2018 Atlantic hurricane season

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2018 Atlantic hurricane season
2018 Atlantic hurricane season summary map.png
Season summary map
Seasonal boundaries
First system formed May 25, 2018
Last system dissipated Season ongoing
Strongest storm
Name Florence
 • Maximum winds 140 mph (220 km/h)
(1-minute sustained)
 • Lowest pressure 939 mbar (hPa; 27.73 inHg)
Seasonal statistics
Total depressions 11
Total storms 10
Hurricanes 5
Major hurricanes
(Cat. 3+)
1
Total fatalities 63 total
Total damage > $17.125 billion (2018 USD)
Related articles
Atlantic hurricane seasons
2016, 2017, 2018, 2019, 2020

The 2018 Atlantic hurricane season is an ongoing event in the annual formation of tropical cyclones in the Northern Hemisphere. The season officially began on June 1, 2018, and will end on November 30, 2018. These dates historically describe the period each year when most tropical cyclones form in the Atlantic basin and are adopted by convention. However, tropical cyclogenesis is possible at any time of the year, as shown by the formation of Subtropical Storm Alberto on May 25, marking the fourth consecutive year in which a storm developed before the official start of the season. The next storm, Beryl, became the first hurricane to form in the eastern Atlantic during the month of July since Bertha in 2008. Chris, upgraded to a hurricane on July 10, became the earliest second hurricane in a season since 2005. On September 5, Florence became the first major hurricane of the season. With the formation of Subtropical Storm Joyce on September 12, the season is the first since 1969 to see five subtropical storms, and the first since 2008 to feature four named storms active simultaneously (Florence, Helene, Isaac, and Joyce).

Seasonal forecasts

Predictions of tropical activity in the 2018 season
Source Date Named
storms
Hurricanes Major
hurricanes
Average (1981–2010[1]) 12.1 6.4 2.7
Record high activity 28 15 7
Record low activity 4 2 0
–––––––––––––––––––––––––––––––––––––––––––––––––––––––
TSR[2] December 7, 2017 15 7 3
CSU[3] April 5, 2018 14 7 3
TSR[4] April 5, 2018 12 6 2
NCSU[5] April 16, 2018 14–18 7–11 3–5
TWC[6] April 19, 2018 13 7 2
NOAA[7] May 24, 2018 10–16 5–9 1–4
UKMO[8] May 25, 2018 11* 6* N/A
TSR[9] May 30, 2018 9 4 1
CSU[10] May 31, 2018 14 6 2
CSU[11] July 2, 2018 11 4 1
TSR[12] July 5, 2018 9 4 1
CSU[13] August 2, 2018 12 5 1
TSR[14] August 6, 2018 11 5 1
NOAA[15] August 9, 2018 9–13 4–7 0–2

–––––––––––––––––––––––––––––––––––––––––––––––––––––––

Actual activity
11 5 1
* June–November only.
† Most recent of several such occurrences. (See all)

Ahead of and during the season, several national meteorological services and scientific agencies forecast how many named storms, hurricanes, and major hurricanes (Category 3 or higher on the Saffir-Simpson scale) will form during a season and/or how many tropical cyclones will affect a particular country. These agencies include the Tropical Storm Risk (TSR) Consortium of University College London, the National Oceanic and Atmospheric Administration (NOAA) and Colorado State University (CSU). The forecasts include weekly and monthly changes in significant factors that help determine the number of tropical storms, hurricanes, and major hurricanes within a particular year. Some of these forecasts also take into consideration what happened in previous seasons and an ongoing La Niña event that had recently formed in November 2017.[16] On average, an Atlantic hurricane season between 1981 and 2010 contained twelve tropical storms, six hurricanes, and three major hurricanes, with an Accumulated Cyclone Energy (ACE) index of between 66 and 103 units.[1]

Pre-season outlooks

The first forecast for the year was released by TSR on December 7, 2017, which predicted a slightly above-average season in 2018, with a total of 15 named storms, 7 hurricanes, and 3 major hurricanes.[2] On April 5, 2018, CSU released its forecast, predicting a slightly above-average season with 14 named storms, 7 hurricanes, and 3 major hurricanes.[3] TSR released its second forecast on the same day, predicting a slightly-below average hurricane season, with 12 named storms, 6 hurricanes, and 2 major hurricanes, the reduction in both the number and size of storms compared to its first forecast being due to recent anomalous cooling in the far northern and tropical Atlantic.[4] Several days later, on April 16, North Carolina State University released its predictions, forecasting an above-average season, with 14–18 named storms, 7–11 hurricanes, and 3–5 major hurricanes.[5] On April 19, The Weather Company released its first forecasts, predicting 2018 to be a near-average season, with a total of 13 named storms, 7 hurricanes, and 2 major hurricanes.[6] On May 24, NOAA released their first forecasts, calling for a near to above average season in 2018.[7] On May 25, the UK Met Office released their prediction, predicting 11 tropical storms, 6 hurricanes, and an Accumulated Cyclone Energy (ACE) value of approximately 105 units.[8] In contrast, on May 30, TSR released their updated prediction, significantly reducing their numbers to 9 named storms, 4 hurricanes and 1 major hurricane, citing a sea surface temperature setup analogous of those observed during the cool phase of the Atlantic multidecadal oscillation.[9] On May 31, one day before the season officially began, CSU updated their forecast to include Subtropical Storm Alberto, also decreasing their numbers due to anomalous cooling in the tropical and far northern Atlantic.[10]

Mid-season outlooks

On July 2, CSU updated their forecast once more, lowering their numbers again to 11 named storms, 4 hurricanes, and 1 major hurricane, citing the continued cooling in the Atlantic and an increasing chance of El Niño forming later in the year.[11] TSR released their fourth forecast on July 5, retaining the same numbers as their previous forecast.[12] On August 2, CSU updated their forecast again, increasing their numbers to 12 named storms, 5 hurricanes, and 1 major hurricane, citing the increasing chance of a weak El Niño forming later in the year.[13] Four days later, TSR issued their final forecast for the season, slightly increasing their numbers to 11 named storms, 5 hurricanes and only one major hurricane, with the reason of having two unexpected hurricanes forming by the beginning of July.[14] On August 9, 2018, NOAA revised its predictions, forecasting a below-average season with 9–13 named storms, 4–7 hurricanes, and 0–2 major hurricanes for all of the 2018 season.[15]

Seasonal summary

Tropical Storm Gordon (2018)Hurricane FlorenceHurricane BerylSubtropical Storm AlbertoSaffir–Simpson scale
The 2018 Atlantic hurricane season became the most recent season to feature four simultaneous named storms, after 2008. Visible in the image is Florence (left), Isaac (bottom center), Helene (lower right), and Joyce (upper right) on September 12.

For the fourth consecutive year, activity began early with the formation of Subtropical Storm Alberto on May 25. Alberto went on to attain winds of 65 mph, before making landfall in North Florida with winds of 45 mph. Alberto transitioned into a tropical depression before dissipating over Lake Michigan on May 31. After a month of inactivity, Beryl formed in the Main Developmental Region on July 5, attaining hurricane status before dissipating just east of the Caribbean. Beryl redeveloped on July 14 in the Atlantic, before dissipating on July 16. Chris formed a day after Beryl, strengthening to a Category 2 hurricane on July 11, before dissipating over Atlantic Canada the following day. August featured little activity in the form of Debby and Ernesto, neither of which affected land. However, Ernesto was the fourth storm of the season that was a subtropical storm.

The next tropical cyclone, Hurricane Florence, formed on August 31, but was named on September 1, and became the first major hurricane of the season on September 5. It would make landfall on the Carolinas on September 14 and dump the most rain on the Carolinas on record. Activity would increase dramatically with Tropical Storm Gordon forming on September 3 and making an impact on the Gulf Coast. Hurricanes Helene and Isaac formed on September 7, with Isaac hitting the Lesser Antilles and Helene impacting the Azores and the United Kingdom. Tropical Storm Joyce formed on September 12 and meandered in the Atlantic.

The Accumulated Cyclone Energy index for the 2018 Atlantic hurricane season, as of 06:00 UTC on September 16, is 81.1 units.[nb 1]

Systems

Subtropical Storm Alberto

Subtropical storm (SSHWS)
Alberto 2018-05-27 1621Z.jpg Alberto 2018 track.png
Duration May 25 – May 31
Peak intensity 65 mph (100 km/h) (1-min)  990 mbar (hPa)

A broad area of low pressure formed over the southwestern Caribbean Sea on May 21, as the result of the interaction between an upper-level low and a weak surface trough.[17] The low drifted slowly westward and then northward through the Caribbean Sea as it gradually organized. By 15:00 UTC on May 25, the strongly sheared low had organized sufficiently to be classified as Subtropical Storm Alberto while situated about 55 miles (90 km) south of Cozumel, Quintana Roo,[18] which made this season the fourth-consecutive season in which storms formed earlier than the official start of the season on June 1. After remaining nearly stationary for the next day, Alberto began to move northwards. After entering the Gulf of Mexico, where wind shear lessened and sea surface temperatures were above average, Alberto began to intensify. Early on May 28, it reached its peak intensity with maximum sustained winds of 65 mph (100 km/h). Afterward, it began to weaken as it neared the Gulf Coast, making landfall near Laguna Beach, Florida, at 21:00 UTC with winds of 45 mph (75 km/h).[19] The cyclone weakened to a subtropical depression shortly after landfall, later becoming tropical over Tennessee. On May 31, Alberto finally transitioned to a post-tropical cyclone while over northern Michigan. The remnant low was subsequently absorbed by a frontal system over Ontario on the next day.[20]

Hurricane Beryl

Category 1 hurricane (SSHWS)
Beryl 2018-07-06 1350Z.jpg Beryl 2018 track.png
Duration July 4 – July 16
Peak intensity 80 mph (130 km/h) (1-min)  991 mbar (hPa)

Late on July 3, the NHC began tracking a vigorous tropical wave over the eastern tropical Atlantic for tropical cyclone development. The tropical wave quickly coalesced as it moved westward, and at 15:00 UTC on July 5, it organized into a tropical depression while situated over the central tropical Atlantic Ocean.[21] Favorable environmental conditions allowed the tiny system to strengthen, becoming Tropical Storm Beryl by 18:30 UTC,[22] and further intensifying into a Category 1 hurricane by 06:00 UTC on July 6 as a pinhole eye became evident.[23] Upon designation as a hurricane, it became the second earliest on record in the Main Development Region (south of 20°N and between 60° and 20°W), surpassed only by 1933's Hurricane Two.[24] This intensity was short-lived, as accelerating low-level flow imparted shear on the cyclone and caused it to weaken back to tropical storm strength, by 15:00 UTC on July 7.[25] An Air Force reconnaissance aircraft investigated the system early the next morning, finding that Beryl had degenerated into an open trough; the NHC de-classified Beryl as a tropical cyclone at 21:00 UTC on July 8, accordingly.[26] The remnants were monitored for several days, although little organization occurred during much of that time. However, conditions gradually became more favorable for redevelopment, and on July 14 at 17:00 UTC, Beryl regenerated into a subtropical storm near Bermuda. The rejuvenated storm soon began to lose convection, as dry air infiltrated the system. By 03:00 UTC on July 16, Beryl degenerated into a remnant low once again, after having lacked organized convection for more than twelve hours.[27]

Hurricane Chris

Category 2 hurricane (SSHWS)
Chris 2018-07-10 1815Z.jpg Chris 2018 track.png
Duration July 6 – July 12
Peak intensity 105 mph (165 km/h) (1-min)  970 mbar (hPa)

Late on July 2, the NHC began monitoring the potential for an area of low pressure to form near Bermuda in a low-pressure circulation.[28] A non-tropical low formed a few hundred miles south of Bermuda on July 3.[29] Shower and thunderstorm activity gradually became better defined as the low moved generally northwestward into the Gulf Stream. At 21:00 UTC on July 6, the low organized into Tropical Depression Three, while located off the coast of North Carolina. Strengthening of the depression was slow due to the circulation being elongated.[30] Nevertheless, at 09:00 UTC on July 8, Tropical Depression Three was upgraded into Tropical Storm Chris.[31] Although it was forecast to strengthen into a hurricane the following day, dry air intrusion and upwelling caused by the storm resulted in little strengthening throughout the day. However, Chris was able to mix the dry air out of its circulation as it accelerated northeastward into warmer waters the following day. With a well-defined eye and impressive appearance on satellite imagery, Chris finally strengthened into a hurricane at 21:00 UTC on July 10.[32] At 03:00 UTC on the next morning, Chris rapidly intensified to Category 2 hurricane status, as a convective ring in its core transformed into a full eyewall.[33] However, the hurricane's eye later became ragged and ill-defined, resulting in it weakening to Category 1 intensity at 21:00 UTC on July 11.[34] As the storm continued to cross the Gulf Stream, Chris further weakened below hurricane strength at 09:00 UTC on the following morning.[35] By this time, Chris had begun to undergo an extratropical transition and also experienced an expanding windfield; Chris transitioned to an extratropical cyclone as it merged with a frontal system, about six hours later.[36]

On July 7, a man drowned in rough seas attributed to the storm at Kill Devil Hills, North Carolina.[37] As an extratropical cyclone, the system brought locally heavy rain and gusty winds to Newfoundland and Labrador. Rainfall accumulations peaked at 3.0 in (76 mm) in Gander, while gusts reached 60 mph (96 km/h) in Ferryland.[38] Rainfall accumulations were highest on Sable Island, at 4.39 in (111.6 mm).[39]

Tropical Storm Debby

Tropical storm (SSHWS)
Debby 2018-08-08 1430Z.jpg Debby 2018 track.png
Duration August 7 – August 9
Peak intensity 50 mph (85 km/h) (1-min)  1000 mbar (hPa)

On August 4, the NHC began monitoring a non-tropical low over the northern Atlantic Ocean for tropical or subtropical development.[40] Initially, convection remained very limited, with the system consisting mostly of a convectionless swirl interacting with an upper-level low. However, as the system moved into a more favorable environment it gradually began to acquire subtropical characteristics. At 15:00 UTC on August 7, the low had developed sufficiently organized convection to be classified as Subtropical Storm Debby.[41] The storm slowly gained tropical characteristics as it travelled northwards, and by 09:00 UTC on August 8, Debby became fully tropical, with sustained winds increasing to 45 mph (75 km/h).[42] Despite marginal ocean temperatures, Debby continued to strengthen, peaking with maximum sustained winds of 50 mph (85 km/h).[43] Afterward, Debby began to weaken as it began to lose tropical characteristics. At 21:00 UTC on August 9, Debby degenerated into a post-tropical cyclone, as it accelerated northeastward ahead of a shortwave trough.[44]

Tropical Storm Ernesto

Tropical storm (SSHWS)
Ernesto 2018-08-16 1340Z.jpg Ernesto 2018 track.png
Duration August 15 – August 18
Peak intensity 45 mph (75 km/h) (1-min)  999 mbar (hPa)

A complex non-tropical low pressure system formed over the northern Atlantic on August 12.[45] As the low drifted southeastward and slowly weakened, a new low formed to the east of the system on August 14.[46] The new low quickly acquired subtropical characteristics, and by 09:00 UTC on August 15, the low had organized sufficiently to be classified as a subtropical depression.[47] At 15:00 UTC that same day, the depression became Subtropical Storm Ernesto.[48] On August 16, the storm attempted to transition into a fully tropical cyclone—as convection started to form near the center—however, it soon decayed.[49] Nevertheless, another burst of convection formed near the center a few hours later, indicating that Ernesto successfully transitioned into a tropical cyclone.[50] On August 17, Ernesto began accelerating towards the northeast, as the system was caught up in the jet stream. The next day, the storm transitioned into an extratropical cyclone.[51] The remnants of Ernesto impacted Ireland and the United Kingdom on August 19.[52][53]

Hurricane Florence

Category 4 hurricane (SSHWS)
Florence 2018-09-10 Suomi NPP.jpg Florence 2018 track.png
Duration August 31 – September 17
Peak intensity 140 mph (220 km/h) (1-min)  939 mbar (hPa)

On August 28, the NHC first mentioned the possibility of tropical cyclone formation from a tropical wave expected to exit western Africa.[54] Two days later, the tropical wave moved off the coast of Senegal, with disorganized thunderstorms[55] and a well-defined low-pressure area.[56] Due to the system's threat to the Cape Verde islands, the NHC initiated advisories on Potential Tropical Cyclone Six at 15:00 UTC on August 30.[57] The system organized into Tropical Depression Six at 21:00 UTC on August 31.[58] Early on September 1, Tropical Depression Six strengthened into Tropical Storm Florence. Gradual intensification occurred as Florence continued west-northwestward across the central Atlantic, and at 15:00 UTC on September 4, it intensified into the third hurricane of the season.[59] On September 5, Florence unexpectedly underwent rapid intensification into a Category 3 major hurricane.[60] Rapid intensification continued and at 21:00 UTC, Florence intensified into a Category 4 hurricane at 22°24′N 46°12′W / 22.4°N 46.2°W / 22.4; -46.2 (Florence),[61] farther northeast than any previous Category 4 hurricane in the Atlantic during the satellite era.[62] However, rapid intensification caused the now-stronger storm to veer northwards into a zone of greater vertical wind shear.[63] Over the next 30 hours, Florence rapidly weakened into a tropical storm due to the strong wind shear, with the storm's cloud pattern becoming distorted.[64] After entering a zone of less shear and crossing into warmer waters, Florence restrengthened into a hurricane on September 9.[65] On the next day, Florence underwent a second period of rapid intensification and reintensified into a major hurricane.[66] At 16:00 UTC on the same day, Florence reintensified into a Category 4 hurricane.[67] Before impacting the coast however, Florence underwent an eyewall replacement cycle and encountered moderate wind shear, weakening it to a Category 2 hurricane.[68] Florence quickly weakened into a tropical depression inland, and the NHC issued its last advisory at 10:00 UTC on September 16, passing on responsibility to the Weather Prediction Center (WPC). At that point, Florence had also begun to gradually accelerate westward.[69] On September 17, Florence slowly turned to the northeast, while continuing to weaken. Late on the same day, Florence weakened into a remnant low, while situated over West Virginia.[70] Florence still posed a threat inland, as it dumped tremendous amounts of rain on the Eastern Seaboard. The system finally dissipated in the open Atlantic on September 19.[71]

Florence posed a major threat to the East Coast of the United States, especially North Carolina and South Carolina, which declared states of emergency, along with Virginia, Maryland,[72] and Washington, D.C..[73] The NHC issued its first hurricane watches at 9:00 UTC on September 11.[74]

Tropical Storm Gordon

Tropical storm (SSHWS)
Gordon 2018-09-04 1905Z.jpg Gordon 2018 track.png
Duration September 3 – September 8
Peak intensity 70 mph (110 km/h) (1-min)  997 mbar (hPa)

On August 30, the NHC began monitoring a tropical disturbance over the north-central Caribbean, giving it a 30% chance of development within 5 days.[75] Gradual organization occurred as the system moved northwestward toward the Bahamas, and at 18:00 UTC on September 2, it was designated Potential Tropical Cyclone Seven, as it was forecasted to impact land areas as a tropical storm within two days.[76] At 12:05 UTC on the next morning, the system organized into Tropical Storm Gordon while moving over the Florida Keys.[77] Although the storm intensified slightly as it moved over southern Florida, the core became disrupted and the associated convection became disorganized.[78] Emerging over the Gulf of Mexico late on September 3, Gordon began to strengthen further and become more organized, with a band of deep convection developing near the small core of the system. Late on September 4, Gordon reached its peak intensity with maximum sustained winds of 70 mph (110 km/h) shortly before making landfall just west of the Alabama-Mississippi border.[79] After making landfall, Gordon weakened into a tropical depression. The NHC issued its last advisory at 4:00 PM CDT on Wednesday, September 5. Moving further inland and quickly weakening, Gordon lingered over the southeastern United States for the next two days, before finally degenerating into a remnant low on September 8. The remnants of Gordon continued across the northeast, dropping heavy amounts of rain, before being absorbed by another frontal system over New England, on September 12.[80]

Hurricane Helene

Category 2 hurricane (SSHWS)
Helene 2018-09-11 1245Z.jpg Helene 2018 track.png
Duration September 7 – September 16
Peak intensity 110 mph (175 km/h) (1-min)  966 mbar (hPa)

At 15:00 UTC on September 7, the NHC began monitoring an area of disturbance near Senegal, developing from a tropical wave emerging from the coast of West Africa. The system had been forecast to spawn a tropical depression in the previous days.[81] The system rapidly organized near the west coast of Africa and was designated as Potential Tropical Cyclone Eight at 12:00 UTC September 7 just off the coast of Africa as it was threatening to impact the Cape Verde Islands.[82] The system continued to organize, and on the same day, it became Tropical Depression Eight. The system later strengthened into Tropical Storm Helene on the same day. On September 9, Helene strengthened into a Category 1 hurricane, with winds of 85 mph (140 km/h) at 13°54′N 27°12′W / 13.9°N 27.2°W / 13.9; -27.2 (Helene),[83] trailing 2015's Hurricane Fred as the easternmost hurricane to form in the main development region (MDR) during the satellite era.[84] Helene strengthened into a Category 2 hurricane at 15:00 UTC on September 10,[85] but quickly weakened into a tropical storm at 15:00 UTC on September 13. Tropical storm watches were issued for the Azores at 21:00 UTC on September 13, which were upgraded to tropical storm warnings at 09:00 UTC on September 14. From September 13–14, Helene interacted with the smaller Tropical Storm Joyce to the west, due to the Fujiwhara effect, steering Joyce counter-clockwise around the larger system.[86] Afterward, Helene began accelerating toward the northeast, passing over the Azores late on September 15.[87] On September 16, Helene transitioned into an extratropical cyclone while accelerating toward the British Isles,[88] becoming the first named storm of the 2018–19 European windstorm season.[89]

Heavy rainfall from the precursor tropical wave in Guinea triggered flooding, which claimed three lives in Doko on September 6.[90] As a tropical cyclone, Helene passed close to Santa Cruz das Flores in the Azores with winds of up to 62 mph (100 km/h) on September 15. After completing an extratropical transition, Storm Helene continued onwards to impact Ireland and the United Kingdom. Weather warnings forecasting winds of up to 65 mph (105 km/h) were issued for southern and western areas of the United Kingdom;[91] however, Helene weakened considerably as it approached the British Isles, and all weather warnings were discontinued on September 18, as Helene was crossing northern England with only minimal impacts.

Hurricane Isaac

Category 1 hurricane (SSHWS)
Isaac 2018-09-09 1305Z.jpg Isaac 2018 track.png
Duration September 7 – September 15
Peak intensity 75 mph (120 km/h) (1-min)  993 mbar (hPa)

On September 2, the NHC began monitoring a tropical wave situated over West Africa.[92] On September 7, the tropical wave was forecast to have a 90% chance of developing into a tropical cyclone within the next few days. Later on the same day, the storm developed into Tropical Depression Nine simultaneously with Tropical Depression Eight, which would go on to become Tropical Storm Helene.[93] On September 8, the system intensified into Tropical Storm Isaac.[94] Early on September 10, Isaac strengthened into a Category 1 hurricane, following Helene, and was noted to be quite small.[95] The system weakened into a tropical storm at 03:00 UTC on September 11. At 09:00 UTC on September 14, the system weakened into a tropical depression.[96] However, at 21:00 UTC on the same day, Isaac briefly restrengthened into a tropical storm, although it soon weakened once more, degenerating into an elongated trough at 10:00 UTC on September 15.[97]

Tropical Storm Joyce

Tropical storm (SSHWS)
Joyce 2018-09-14 1625Z.jpg Joyce Atlantic 2018 track.png
Duration September 12 – September 19
Peak intensity 50 mph (85 km/h) (1-min)  997 mbar (hPa)

The NHC began monitoring a non-tropical area of low pressure forming along a trough of low pressure on September 11.[98] Contrary to forecasts of gradual organization, the low quickly acquired subtropical characteristics as it moved southwestward. At 21:00 UTC on September 12, the low strengthened into Subtropical Storm Joyce.[99] From September 13–14, Joyce interacted with the larger Hurricane Helene, due to the Fujiwhara effect, with Joyce being steered counter-clockwise around Helene.[86] At 03:00 UTC on September 14, Joyce transitioned into a tropical storm.[100] Later that day, Joyce began turning eastward.[101] Late on September 14, Joyce reached its peak intensity, with a more organized appearance on satellite.[102] Afterward, Joyce began to weaken, due to the increasing wind shear. At 15:00 UTC on September 16, Joyce weakened into a tropical depression.[103] At 3:00 UTC on September 19, Joyce weakened into a remnant low, and the NHC issued their last advisory on the system.[104]

Tropical Depression Eleven

Tropical Depression ElevenTD
Current storm status
Tropical depression (1-min mean)
97L 2018-09-21 1620Z.jpg
Satellite image
11L 2018 5day.png
Forecast map
As of: 11:00 p.m. AST September 21 (03:00 UTC September 22)
Location: 13°06′N 53°24′W / 13.1°N 53.4°W / 13.1; -53.4 (Tropical Depression Eleven) ± 15 nm
About 510 mi (825 km) E of Windward Islands
Sustained winds: 30 kt (35 mph; 55 km/h) (1-min mean)
gusting to 40 kt (45 mph; 75 km/h)
Pressure: 1007 mbar (hPa; 29.74 inHg)
Movement: WNW at 5 kt (6 mph; 9 km/h)
See more detailed information.

On September 18, a large area of disturbed weather in association with a tropical wave developed well east-southeast of the Lesser Antilles.[105] The system initially lacked a surface circulation, and though a weak one formed on September 21, strong upper-level winds and dry air were expected to limit formation.[106] Deep convection, despite being displaced east, became persistent throughout the day, leading to the formation of a tropical depression by 03:00 UTC on September 22.[107]

Current storm information

As of 11:00 p.m. AST September 21 (03:00 UTC September 22), Tropical Depression Eleven is located within 15 nautical miles of 13°06′N 53°24′W / 13.1°N 53.4°W / 13.1; -53.4 (Eleven), about 510 miles (825 km) east of the Windward Islands. Maximum sustained winds are 30 knots (35 mph; 55 km/h), with gusts to 40 knots (45 mph; 75 km/h). The minimum barometric pressure is 1007 mbar (hPa; 29.74 inHg), and the system is moving west-northwest at 5 knots (6 mph; 9 km/h).

For latest official information, see:

Tropical Storm Kirk

Tropical Storm KirkTS
Current storm status
Tropical storm (1-min mean)
See more detailed information.

Storm names

The following list of names is being used for named storms that form in the North Atlantic in 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. This is the same list used in the 2012 season, with the exception of the name Sara, which replaced Sandy.

  • Helene
  • Isaac
  • Joyce
  • Kirk (active)
  • Leslie (unused)
  • Michael (unused)
  • Nadine (unused)
  • Oscar (unused)
  • Patty (unused)
  • Rafael (unused)
  • Sara (unused)
  • Tony (unused)
  • Valerie (unused)
  • William (unused)

Season effects

This is a table of all the storms that have formed in the 2018 Atlantic 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 USD. Potential tropical cyclones are not included in this table.

Saffir–Simpson scale
TD TS C1 C2 C3 C4 C5
2018 North Atlantic tropical cyclone 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 Refs


Alberto May 25 – 31 Subtropical storm 65 (100) 990 Yucatán Peninsula, Cayman Islands, Cuba, Southeastern United States, Midwestern United States, Ontario >$125 million 10 (2) [108]
Beryl July 4 – 16 Category 1 hurricane 80 (130) 991 Lesser Antilles, Hispaniola, Puerto Rico, Eastern Cuba, The Bahamas, Bermuda Minimal None
Chris July 6 – 12 Category 2 hurricane 105 (165) 970 Bermuda, East Coast of the United States, Atlantic Canada, Iceland Unknown 1
Debby August 7 – 9 Tropical storm 50 (85) 1000 None None None
Ernesto August 15 – 18 Tropical storm 45 (75) 999 Ireland, United Kingdom None None
Florence August 31 – September 17 Category 4 hurricane 140 (220) 939 West Africa, Cape Verde, Bermuda, Eastern United States, Atlantic Canada >$17 billion 28 (17) [109]
Gordon September 3 – 8 Tropical storm 70 (110) 997 Hispaniola, Cuba, The Bahamas, Gulf Coast of the United States, Arkansas, Missouri, Eastern United States, Southern Ontario Unknown 1 (1)
Helene September 7 – 16 Category 2 hurricane 110 (175) 966 West Africa, Cape Verde, Azores, Ireland, United Kingdom, Norway Unknown 3
Isaac September 7 – 15 Category 1 hurricane 75 (120) 993 West Africa, Lesser Antilles, Southwest Haiti, Jamaica Unknown None
Joyce September 12 – 19 Tropical storm 50 (85) 997 None None None
Eleven September 22 – Present Tropical depression 35 (55) 1007 None None None

{{TC stats cyclone3|cat=storm|name=Kirk|dates=September 22-Present|max-winds=40mph|min-press=1000|areas=West Africa|damage=Minimal|deaths=none}}

Season Aggregates
11 systems May 25 – Season ongoing   140 (220) 939 >$17.1 billion 43 (20)  

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 Atlantic hurricane season/ACE calcs.

References

  1. ^ a b "Background Information: The North Atlantic Hurricane Season". Climate Prediction Center. National Oceanic and Atmospheric Administration. August 9, 2012. Retrieved December 13, 2013. 
  2. ^ a b Mark Saunders; Adam Lea (December 7, 2017). "Extended Range Forecast for Atlantic Hurricane Activity in 2018" (PDF). London, United Kingdom: Tropical Storm Risk. 
  3. ^ a b CSU External Relations Staff (April 5, 2018). "Slightly above-average 2018 Atlantic hurricane season predicted by CSU team". Fort Collins, CO. 
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