The 2018-19 Alaskan arctic cyclone season will begin on October 1, 2018 and end on April 1, 2019. However, polar cyclone formation is possible at any time in the year. Due to an expected El Niño which flatlines the jet stream over the basin, which typically limits polar cyclone formation, this season is expected to be below-average in terms of activity.
Timeline[]
Seasonal Forecasts[]
Source | Date | Named storms |
Polar cyclones | Major polar cyclones | |
Average (1979-2016) | 16.4 | 9.3 | 5.1 | ||
Record high activity | 34 | 25 | 16 | ||
Record low activity | 9 | 4 | 1 | ||
HTMC | June 28, 2018 | 13-18 | 7-11 | 3-6 | |
BNMA | June 28, 2018 | 14-19 | 6-11 | 3-6 | |
LHC | June 28, 2018 | 13-20 | 7-11 | 3-7 | |
PWC | June 28, 2018 | 15-19 | 8-10 | 2-5 | |
BNWC | June 28, 2018 | 14-19 | 8-12 | 4-7 | |
GKWC | July 4, 2018 | 12-16 | 5-9 | 2-5 | |
DHC | August 7, 2018 | 17-20 | 8-12 | 2-5 | |
CSHC | August 7, 2018 | 15 | 6 | 2 | |
SHC | August 7, 2018 | 14 | 6 | 3 | |
RMA | August 7, 2018 | 15-19 | 6-10 | 2-4 | |
BNWC | September 11, 2018 | 16-21 | 9-13 | 4-7 | |
CDMC | September 11, 2018 | 17-20 | 9-12 | 4-8 | |
WHC | October 9, 2018 | 16 | 5 | 3 | |
Actual activity |
11 | 7 | 4 |
Storms[]
Polar Cyclone Abrianna[]
Category 7 polar cyclone (HTMC) | |
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Duration | November 19 – December 3 |
Peak intensity | 230 mph (370 km/h) 864 mbar (hPa) |
Polar Cyclone Bob[]
Category 3 polar cyclone (HTMC) | |
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Duration | November 21 – December 1 |
Peak intensity | 125 mph (200 km/h) 947 mbar (hPa) |
Polar Storm Calista[]
Polar storm (HTMC) | |
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Duration | November 26 – December 1 |
Peak intensity | 50 mph (80 km/h) 1001 mbar (hPa) |
Polar Cyclone Daisuke[]
Category 2 polar cyclone (HTMC) | |
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Duration | December 8 – December 16 |
Peak intensity | 105 mph (170 km/h) 973 mbar (hPa) |
Subpolar Storm Earlene[]
Subpolar storm (HTMC) | |
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Duration | December 11 – December 16 |
Peak intensity | 45 mph (70 km/h) 1003 mbar (hPa) |
Polar Cyclone Faxon[]
Category 4 polar cyclone (HTMC) | |
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Duration | December 27 – January 2 |
Peak intensity | 140 mph (225 km/h) 936 mbar (hPa) |
Subpolar Cyclone Gabriella[]
Category 1 subpolar cyclone (HTMC) | |
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Duration | January 2 – January 9 |
Peak intensity | 85 mph (135 km/h) 971 mbar (hPa) |
Polar Storm Hadrian[]
Subpolar storm (HTMC) | |
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Duration | January 6 – January 10 |
Peak intensity | 40 mph (65 km/h) 1005 mbar (hPa) |
Polar Storm Idra[]
Polar storm (HTMC) | |
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Duration | January 8 – January 15 |
Peak intensity | 50 mph (80 km/h) 1000 mbar (hPa) |
Polar Depression 10A[]
Polar depression (HTMC) | |
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Duration | January 14 – January 16 |
Peak intensity | 30 mph (50 km/h) 1007 mbar (hPa) |
Polar Cyclone Jabbar[]
Category 6 polar cyclone (HTMC) | |
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Duration | January 15 – February 4 |
Peak intensity | 200 mph (320 km/h) 869 mbar (hPa) |
Polar Cyclone Katelynn[]
Category 1 polar cyclone (HTMC) | |
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Duration | February 21 – February 25 |
Peak intensity | 80 mph (130 km/h) 988 mbar (hPa) |
Storm Names[]
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