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2017 Atlantic hurricane season
2017 Atlantic hurricane season summary map
Seasonal summary map of the 2017 Atlantic Season.
Seasonal boundaries
First system formed April 19, 2017
Last system dissipated November 9, 2017
Strongest storm
Name Maria
 • Maximum winds 175 mph (280 km/h)
 • Lowest pressure 908 mbar (hPa; 26.81 inHg)
Seasonal statistics
Total depressions 19
Total storms 18
Hurricanes 10
Major hurricanes
(Cat. 3+)
6
Total fatalities 299 - 1,320 Direct, 178 Indirect
Total damage > $281.14 billion (2017 USD)
Atlantic hurricane seasons
2015, 2016, 2017, 2018, 2019

The 2017 Atlantic hurricane season was a hyperactive season, and is the costliest season on record. It has also been a record season in other ways. With the formation of Arlene on April 19; making it the first April storm to form since Ana of 2003, followed by the intensifying in an area of cold sea surface temperatures and moderate wind-shear.

Hurricane Irma held peak intensity for 37 straight hours, becoming the only cyclone worldwide to do so, and generated the third-highest amount of ACE produced by a single storm.

Hurricane Maria caused a humanitarian crisis in Puerto Rico.

On October 14, Ophelia became the easternmost major hurricane on record.

Pre-Season Forecasts

On December 13, 2016, Tropical Storm Risk (TSR) issued their first prediction for the 2017 Atlantic hurricane season, forecasting near average activity with 14 named storms, 6 hurricanes, and 3 major hurricanes. They said in their prediction that there was high uncertainty with the outcome of the season, as typical with their December forecasts. The next day, Colorado State University (CSU) issued their annual December qualitative discussion, noting that the activity of the season would be heavily dependent on whether El Nino develops and the state of the Atlantic Multidecadal Oscillation (AMO). In this discussion, probabilities were slightly higher for an above-normal season than a below-normal season.

On April 5, 2017, TSR released its April forecast, lowering their numbers to 11 named storms, 4 hurricanes and 2 major hurricanes with an ACE of around 67 due to the possibility of El Nino. The next day, Colorado State University (CSU) released its April forecast, also predicting 11 named storms, 4 hurricanes and 2 major hurricanes. They predicted an ACE of 75, slightly more than TSR. On April 17, 2017, The Weather Company (TWC) issued their 2017 forecast, predicting 12 named storms, 6 hurricanes and 2 major hurricanes. A day later, North Carolina State University (NCSU) gave their prediction of 11-15 named storms, 4-6 hurricanes, and 1-3 major hurricane.

On May 20, 2017, TWC updated their forecast to 14 named storms, 7 hurricanes, and 3 major hurricanes, after Tropical Storm Arlene formed and the chance of an El Niño forming was dropping. On May 25, National Oceanic and Atmospheric Administration (NOAA) issued their first forecast, saying it could produce 11-17 named storms, 5-9 hurricanes, and 2-4 major hurricanes, and gave a 70% chance of an above average season. On May 26, TSR updated the forecast slightly with the same numbers as their December prediction, the only change was the ACE prediction was changed from 101 units to 98 units. The same day, Force-Thirteen released their Pre-season forecasts, stating a prediction of 15 named storms, 8 hurricanes, and 4 major hurricanes, also stating that the East Coast, Caribbean, and Texas-Mexico Coast had a higher than normal risk of a tropical cyclone impact.

Mid-season outlooks

On June 1, CSU updated their predictions to have 14 named storms, 6 hurricanes, and 2 major hurricanes. Along with the UKMO updating their forecasts to call for 13 named storms, and 8 hurricanes; with an ACE prediction of 145. On July 4, TSR released their last forecast for the season, calling for 17 named storms, 7 hurricanes, and 3 major hurricanes, with a predicted ACE index of 116 units. NOAA released their last forecast on August 9, calling for 14-19 named storms, 5-9 hurricanes, and 2-5 major hurricanes.

Timeline

Cyclone NumaTropical Storm Philippe (2017)Hurricane OpheliaHurricane Nate (2017)Hurricane LeeHurricane MariaHurricane LeeHurricane Katia (2017)Hurricane Jose (2017)Hurricane IrmaHurricane HarveyHurricane Gert (2017)Hurricane FranklinTropical Storm Emily (2017)Tropical Storm Don (2017)Tropical Storm Cindy (2017)Tropical Storm Bret (2017)Tropical Storm Arlene (2017)

Storms

Tropical Storm Arlene

Main article: Tropical Storm Arlene (2017)
Tropical storm (SSHWS)
Arlene 2017-04-20 1512Z.jpg Arlene 2017 track.png
Duration April 19 – April 21
Peak intensity 50 mph (85 km/h) (1-min)  990 mbar (hPa)

Tropical Storm Arlene was an unusually early preseason system that formed over waters typically unable to sustain tropical cyclogenesis.

Tropical Storm Bret

Main article: Tropical Storm Bret (2017)
Tropical storm (SSHWS)
Bret 2017-06-19 Suomi NPP.jpg Bret 2017 track.png
Duration June 19 – June 20
Peak intensity 45 mph (75 km/h) (1-min)  1007 mbar (hPa)

Tropical Storm Bret was a rare storm that formed in the Main Development Region in June, an unusual occurrence. Bret would make landfall in Trinidad and Tobago, and then Venezuela, causing minimal damage and two deaths (one direct, one indirect). 

Tropical Storm Cindy

Main article: Tropical Storm Cindy (2017)
Tropical storm (SSHWS)
Cindy 2017-06-21 1645Z.jpg Cindy 2017 track.png
Duration June 20 – June 23
Peak intensity 60 mph (95 km/h) (1-min)  991 mbar (hPa)

Tropical Storm Cindy developed in the Gulf of Mexico on June 20, and went on to landfall 2 days later in Cameron Parish, Louisiana, becoming the first to landfall in the state since Hurricane Isaac of 2012. Damage was minimal and 2 people were killed (One direct, one indirect).

Tropical Depression Four 

Tropical depression (SSHWS)
04L 2017-07-06 1605Z.jpg 04L 2017 track.png
Duration July 5 – July 7
Peak intensity 30 mph (45 km/h) (1-min)  1009 mbar (hPa)

Tropical Depression Four developed out of a tropical wave on July 6. Due to dry air, the depression dissipated a day later. It did not affect land.

Tropical Storm Don

Main article: Tropical Storm Don (2017)
Tropical storm (SSHWS)
Don 2017-07-17 1710Z.jpg Don 2017 track.png
Duration July 17 – July 18
Peak intensity 50 mph (85 km/h) (1-min)  1007 mbar (hPa)


Tropical Storm Emily

Main article: Tropical Storm Emily (2017)
Tropical storm (SSHWS)
Emily 2017-07-31 1555Z.jpg Emily 2017 track.png
Duration July 31 – August 2
Peak intensity 45 mph (75 km/h) (1-min)  1005 mbar (hPa)

Hurricane Franklin

Main article: Hurricane Franklin
Category 1 hurricane (SSHWS)
800px-Franklin 2017-08-09 1854Z.jpg Franklin 2017 track.png
Duration August 7 – August 10
Peak intensity 85 mph (140 km/h) (1-min)  981 mbar (hPa)

Hurricane Gert

Main article: Hurricane Gert (2017)
Category 2 tropical cyclone (SSHWS)
Gert 2017-08-16 Suomi NPP.jpg Gert 2017 track.png
Duration August 13 – August 17
Peak intensity 165 km/h (105 mph) (1-min)  967 hPa (mbar)
Gert formed and peaking as a Category 2 hurricane at a very high latitude of 40°N.  

Hurricane Harvey

Main article: Hurricane Harvey
Category 4 hurricane (SSHWS)
Harvey 2017-08-25 2231Z.png Harvey 2017 track.png
Duration August 17 – September 1
Peak intensity 140 mph (220 km/h) (1-min)  937 mbar (hPa)

Harvey formed east of the Leeward Islands causing minimal damage as it passed through only to degenerate from the high wind-shear in the Caribbean. Its remnants tracked through and regenerated in the warm waters of the Gulf of Mexico and Bay of Campeche, rapidly intensifying into a monstrous storm that slammed into Texas a Category 4 hurricane, only to stall across Texas dumping over 4 feet of rainfall, and doing over $125 billion USD in damages, making it the costliest Atlantic hurricane on record, tying with Hurricane Katrina of 2005.

Hurricane Irma

Main article: Hurricane Irma
Category 5 hurricane (SSHWS)
Irma 2017-09-06 1745Z.jpg Irma 2017 track.png
Duration August 30 – September 12
Peak intensity 185 mph (295 km/h) (1-min)  914 mbar (hPa)

Hurricane Irma rapidly organized eventually peaking a Category 5 hurricane with winds of 185 mph and a pressure of 914 mbar. Irma held that intensity for 37 straight hours, becoming the only cyclone worldwide to do so, and generated the third-highest amount of ACE produced by a single storm. It was also the strongest storm of the year, in terms of wind speed; and the strongest storm since Wilma in terms of wind speed. It made landfall on the northern Leeward Islands at its peak intensity and is tied with the Labor Day Hurricane of 1935 for most intense landfall in terms of wind speed. Irma then struck Cuba as a minimal Category 5 and Florida as a minimal Category 4 hurricane doing copious amounts damage, with estimates at around $62.87 Billion USD.

Hurricane Jose

Main article: Hurricane Jose (2017)
Category 4 hurricane (SSHWS)
Jose 2017-09-08 1347Z.jpg Jose 2017 track.png
Duration September 5 – Sepember 22
Peak intensity 155 mph (250 km/h) (1-min)  938 mbar (hPa)

Hurricane Katia

Main article: Hurricane Katia (2017)
Category 2 hurricane (SSHWS)
Katia 2017-09-08 1930Z.jpg Katia 2017 track.png
Duration September 5 – September 9
Peak intensity 105 mph (165 km/h) (1-min)  972 mbar (hPa)

Tropical Storm Lee (Lee 1)

Main article: Hurricane Lee
Tropical storm (SSHWS)
Lee 2017-09-16 Suomi NPP.jpg Lee 1 2017 Track.png
Duration September 15 – September 19
Peak intensity 40 mph (65 km/h) (1-min)  1007 mbar (hPa)

A tropical wave moved off the coast of Africa on September 13, and original forecasts predicted the system to gradually organize, but instead the system rapidly organized, becoming Tropical Depression Fourteen at 03:00 UTC on September 15. The NHC upgraded the system to Tropical Storm Lee at 15:00 UTC on the next day, based on an increase in deep convection and an advanced scatterometer (ASCAT) pass, which showed tropical-storm-force winds. However, Lee then entered an area of high wind shear, and Lee weakened into a tropical depression, before finally degenerating into a post-tropical remnant low on September 19.

Hurricane Maria

Main article: Hurricane Maria
Category 5 hurricane (SSHWS)
Maria 2017-09-19 2015Z.png Maria 2017 track.png
Duration September 16 – September 30
Peak intensity 175 mph (280 km/h) (1-min)  908 mbar (hPa)

Hurricane Lee (Lee 2)

Main article: Hurricane Lee
Category 3 hurricane (SSHWS)
Lee 2017-09-27 1450Z.jpg Lee 2017 track.png
Duration September 22 – September 30
Peak intensity 115 mph (185 km/h) (1-min)  962 mbar (hPa)

After Tropical Storm Lee dissipated, the remnants fueled and later were absorbed by a developing trough. Which led to a deep burst of convection and new circulation, and at 21:00 UTC on September 22, it became a tropical depression, which the NHC declared Tropical Depression Lee. The new depression intensified into a tropical storm at 03:00 UTC on September 23, and started to rapidly organize, as small curved bands wrapped into a cluster of central convection. At 06:30 UTC on September 24, it was upgraded to a Category 1 hurricane, however the rapid intensification was halted by moderate southeasterly wind shear. However, at 09:00 UTC on September 26, the hurricane obtained Category 2 status. An Eyewall Replacement Cycle happened that night with a bigger eye, and colder cloud tops emerging, and at 15:00 UTC on September 27, the hurricane reached it's peak intensity of 115 mph (185 km/h) and 962 mbar. The hurricane then curved to the northeast and became to quickly weaken from strong northerly wind shear and cooler ocean waters; as it fell below Category 3 strength at 03:00 UTC on September 28, and became a tropical storm at 15:00 UTC on September 29. Later becoming extratropical at 09:00 UTC on September 30. It finally got absorbed by a bigger extratropical cyclone to the north of the cyclone.

Hurricane Nate

Main article: Hurricane Nate (2017)
Category 1 hurricane (SSHWS)
Nate 2017-10-07 1848Z.jpg Nate 2017 track.png
Duration October 4 – October 9
Peak intensity 90 mph (150 km/h) (1-min)  981 mbar (hPa)

Hurricane Ophelia

Main article: Hurricane Ophelia
Category 3 hurricane (SSHWS)
Ophelia 2017-10-14 1454Z.jpg Ophelia 2017 track.png
Duration October 9 – October 16
Peak intensity 115 mph (185 km/h) (1-min)  960 mbar (hPa)

On October 6, a circulation developed at the end of a cold front in the northeast Atlantic and acquired subtropical characteristics by October 7. The next day, the storm encountered stronger wind shear, removing some of its convection, and slightly weakening the system; however, the storm eventually became better organized and developed more convection around its low pressure center later in the day. Early on October 9, the system fully transitioned into Tropical Depression Seventeen. The tropical depression continued to strengthen, becoming Tropical Storm Ophelia later that day. Ophelia continued to strengthen due to low wind shear and on October 11, it became a hurricane. Ophelia became a Category 2 hurricane on October 12. On October 14, Ophelia unexpectedly intensified to a Category 3 hurricane, making Ophelia the sixth major hurricane of the season and the easternmost storm of such strength in the Atlantic basin on record. On October 15, Ophelia began to weaken, while accelerating northeastward towards Ireland and Great Britain, with the storm's wind field also expanding. Early on October 16, Ophelia transitioned into a hurricane-strength extratropical cyclone, as it began impacting Ireland and Britain.

Tropical Storm Philippe

Main article: Tropical Storm Philippe (2017)
Tropical storm (SSHWS)
Philippe 2017-10-28 Suomi NPP.jpg Philippe 2017 track.png
Duration October 28 – October 29
Peak intensity 40 mph (65 km/h) (1-min)  1000 mbar (hPa)

Tropical Storm Rina

Main article: Cyclone Numa
Tropical storm (SSHWS)
Rina 2017-11-07 1548Z.jpg Rina 2017 track.png
Duration November 5 – November 9
Peak intensity 60 mph (95 km/h) (1-min)  991 mbar (hPa)

Storm names

The following names were used in the 2017 Atlantic hurricane season. They are on List III of the 6 rotating naming lists used for the Atlantic basin. This list is largely the same as the one used in the 2011 Atlantic hurricane season with the exception of Irma, which replaced the destructive Irene.

  • Arlene
  • Bret
  • Cindy
  • Don
  • Emily
  • Franklin
  • Gert
  • Harvey 
  • Irma
  • Jose
  • Katia
  • Lee (1)
  • Maria
  • Lee (2)
  • Nate
  • Ophelia
  • Philippe
  • Rina
  • Sean (unused)
  • Tammy (unused)
  • Vince (unused)
  • Whitney (unused)

Season effects

This is a table of all the storms that formed in the 2016 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 wave, or a low, and all the damage figures are in 2016 USD.

Storm

name

Dates active Storm category

at peak intensity

Max

1-min

wind

mph

(km/h)

Min.

press.

(mbar)

Areas

affected

Damage Deaths
Arlene April 19 - 21 Tropical storm 50 (85) 990 None None None
Bret June 19 - 20 Tropical storm 45

(75)

1007 Guyana, Venezuela, Trinidad and Tobago, Windward Islands 3+ Million 1 (1)
Cindy June 20 - 23 Tropical storm 60

(95)

991 Honduras, Belize, Cayman Islands, Yucatan Peninsula, Cuba, Southern United States, Eastern United States 25 Million 2 (1)
Four July 5 - 7 Tropical depression 30

(45)

1009 None None None
Don July 17 - 18 Tropical storm 50

(85)

1005 Windward Islands, Barbados, Grenada, Trinidad and Tobago Minimal None
Emily July 31 - August 2 Tropical storm 45

(75)

1005 Florida 10 Million None
Franklin August 7 - 10 Category 1 hurricane 85 (140) 981 Nicaragua, Honduras, Guatemala, Belize, Yucatan Peninsula, Central Mexico 15 Million None
Gert August 13 - 17 Category 2 hurricane 105

(165)

967 Bermuda, East Coast of the United States, Atlantic Canada None 0 (2)
Harvey August 17 - September 1 Category 4 hurricane 130

(215)

937 Barbados, Suriname, Guyana, Windward Islands, Nicaragua, Belize, Yucatan Peninsula, Northeastern Mexico, Southern United States (Texas, Louisiana), Eastern United States 125 Billion 69 (35)
Irma August 30 - September 12 Category 5 hurricane 185 (295) 914 Cape Verde, Leeward Islands (Barbuda, Saint Martin, Saint Barthelemy, U.S. Virgin Islands), Puerto Rico, Hispaniola, Turks and Caicos Islands, The Bahamas, Cuba, Southeastern United States (Florida and Georgia), Northeastern United States 64.2+ Billion 66 (81)
Jose September 5 - 22 Category 4 hurricane 155 (250) 938 Leeward Islands, East Coast of the United States 2.8 Million 0 (1)
Katia September 5 - 9 Category 2 hurricane 105 (165) 972 Eastern Mexico Unknown 3 (0)
Lee (1) September 15 - 19 Tropical Storm 40 (65) 1000 Cabo Verde Minimal None
Maria September 16 - 30 Category 5 hurricane 175

(280)

908 Lesser Antilles (Dominica, Guadeloupe, Martinique, Saint Croix), Puerto Rico, Hispaniola, Turks and Caicos Islands, The Bahamas, Southeastern United States, Mid-Atlantic States, United Kingdom, Ireland, France, Spain 91.606+ Billion 112 - 1,133
Lee (2) September 22 - 30 Category 3 hurricane 115 (185) 962 None None None
Nate October 4 - 9 Category 1 hurricane 90 (150) 981 Nicaragua, Honduras, Costa Rica, El Salvador, Panama, Mexico, Cayman Islands, Cuba, Southeastern United States (Louisiana, Alabama, Mississippi, and Florida Panhandle), Northeastern United States, Atlantic Canada 207.3 Million 43 (2)
Ophelia October 9 - 16 Category 3 hurricane 115

(185)

960 Azores, Portugal, Spain, France, Ireland, United Kingdom, Norway, Sweden, Finland, Estonia, Russia 71+ Million 3 (51)
Philippe October 28 - 29 Tropical storm 40

(65)

1000 Central America, Cayman Islands, Yucatan Peninsula, Cuba Minimal None
Rina November 5 - 9 Tropical storm 60

(95)

991 None None None
Season Aggregates
19

cyclones

April 19 - November 9 185

(295)

908 281.14+ Billion 299 - 1,320 (174)