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2018 Alaska hurricane season
First storm formed May 24
Last storm dissipated December 21
Strongest storm Joseph - 185 mph, 897 mb
Total depressions 21
Total storms 20
Hurricanes 12
Major hurricanes 6
Total damages $49.35 billion (2016 USD)
Total fatalities 4,298
The 2018 Alaska hurricane season had 20 named storms, 12 hurricanes and 6 major hurricanes. The most notable of these were Hurricane Joseph, which was the costliest and deadliest Alaskan hurricane ever recorded.


Storms

Hurricane Arlene

Category 3 severe tropical cyclone (AHC)


Category 1 hurricane (SSHS)
Counterclockwise vortex
Duration May 24 – June 2
Intensity 90 mph (150 km/h) (1-min),  974 mbar (hPa)
An area of disorganized thunderstorms developed a circulation on October 23, 8 days before the start of the season. The tropical depression strengthened rapidly into Tropical Storm Arlene. Hurricane Warnings were then issued along the Gulf of Alaska coast. On October 31, Arlene strengthened into a Category 1 and 6 hours later attained its peak intensity of 90 mph. As it made landfall near Kodiak, Alaska, the hurricane weakened and dissipated on November 2.


Tropical Storm Beryl

Tropical storm (SSHS)
Counterclockwise vortex
Duration June 7 – June 11
Intensity 45 mph (75 km/h) (1-min),  1002 mbar (hPa)

A subtropical storm developed in the Chukchi Sea, a rare area for any subtropical or tropical development. The system gradually moved south and entered the tropical Bering Sea and transitioned into a tropical storm. Initial forecasts said Beryl would become a hurricane, but due to wind shear, peaked at 50 mph. Beryl was later absorbed by a large extratropical cyclone.


Tropical Depression Three

Tropical depression (SSHS)
Counterclockwise vortex
Duration June 9 – June 10
Intensity 35 mph (55 km/h) (1-min),  1007 mbar (hPa)

The remnants of Typhoon Sandy regenerated in the Gulf of Alaska, but due to immediate land interaction, the depression dissipated. The remnants of Tropical Depression Three caused major flooding in the Pacific Northwest. Three people died and the depression caused $320 million in damage.


Hurricane Chantal

Category 4 hurricane (SSHS)
Counterclockwise vortex
Duration June 18 – June 25
Intensity 135 mph (215 km/h) (1-min),  945 mbar (hPa)

A small tropical storm formed in the Bering Sea on November 16, but was unnoticed by the Alaska Hurricane Center until November 18. Rapid strengthening occurred and Chantal became a Category 2 hurricane on November 19, and just hours later, became a Category 3 major hurricane. Later on November 24, Chantal became a Category 4 hurricane and simultaneously attained peak intensity with winds of 135 mph. It made landfall the next day as a Category 3 hurricane on Nuka Island.


Hurricane Dolly

Category 2 hurricane (SSHS)
Counterclockwise vortex
Duration June 25 – December 5
Intensity 110 mph (175 km/h) (1-min),  969 mbar (hPa)


Tropical Storm Erika

Tropical storm (SSHS)
Counterclockwise vortex
Duration July 2 – July 9
Intensity 50 mph (85 km/h) (1-min),  997 mbar (hPa)


Hurricane Fiona

Category 1 hurricane (SSHS)
Counterclockwise vortex
Duration July 4 – July 14
Intensity 75 mph (120 km/h) (1-min),  973 mbar (hPa)


Hurricane Gert

Category 1 hurricane (SSHS)
Counterclockwise vortex
Duration July 6 – July 10
Intensity 85 mph (140 km/h) (1-min),  976 mbar (hPa)


Hurricane Helene

Category 4 hurricane (SSHS)
Counterclockwise vortex
Duration July 13 – July 18
Intensity 150 mph (240 km/h) (1-min),  939 mbar (hPa)


Tropical Storm Ingrid

Tropical storm (SSHS)
Counterclockwise vortex
Duration July 20 – July 26
Intensity 50 mph (85 km/h) (1-min),  998 mbar (hPa)


Hurricane Joseph

Main article: Hurricane Joseph
Category 5 hurricane (SSHS)
Joseph 2018 track.png
Duration August 3 – August 9
Intensity 185 mph (295 km/h) (1-min),  897 mbar (hPa)

Hurricane Joseph was a destructive Category 5 hurricane. It was the deadliest, costliest and strongest Alaska hurricane ever recorded.


Tropical Storm Kate

Tropical storm (SSHS)
Counterclockwise vortex
Duration August 6 – August 12
Intensity 40 mph (65 km/h) (1-min),  1005 mbar (hPa)


Tropical Storm Lisa

Tropical storm (SSHS)
Counterclockwise vortex
Duration August 12 – August 16
Intensity 50 mph (85 km/h) (1-min),  1000 mbar (hPa)


Hurricane Maria

Category 3 hurricane (SSHS)
Counterclockwise vortex
Duration August 19 – August 24
Intensity 120 mph (195 km/h) (1-min),  956 mbar (hPa)


Tropical Storm Nadine

Tropical storm (SSHS)
Counterclockwise vortex
Duration August 28 – September 7
Intensity 70 mph (110 km/h) (1-min),  989 mbar (hPa)


Hurricane Olga

Category 3 hurricane (SSHS)
Counterclockwise vortex
Duration September 14 – September 27
Intensity 115 mph (185 km/h) (1-min),  967 mbar (hPa)


Hurricane Paulette

Category 4 hurricane (SSHS)
Counterclockwise vortex
Duration September 26 – October 4
Intensity 155 mph (250 km/h) (1-min),  934 mbar (hPa)


Hurricane Rose

Category 2 hurricane (SSHS)
Counterclockwise vortex
Duration October 12 – October 21
Intensity 105 mph (165 km/h) (1-min),  973 mbar (hPa)


Tropical Storm Shary

Tropical storm (SSHS)
Counterclockwise vortex
Duration October 30 – November 5
Intensity 50 mph (85 km/h) (1-min),  998 mbar (hPa)


Tropical Storm Tammy

Tropical storm (SSHS)
Counterclockwise vortex
Duration November 18 – November 27
Intensity 45 mph (75 km/h) (1-min),  1004 mbar (hPa)


Hurricane Valerie

Category 4 hurricane (SSHS)
Counterclockwise vortex
Duration December 13 – December 21
Intensity 145 mph (230 km/h) (1-min),  945 mbar (hPa)


Timeline

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