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Tropical Storm Ian was a pesky, hard to forecast tropical cyclone that later became subtropical, before becoming tropical again before turning extratropical well out in the open Atlantic.

The origins of Ian can be traced back to a tropical wave that emerged into the Atlantic from the coast of Africa on September 6. Moving west until reaching a break in the subtropical ridge, the precursor to Ian was forced to move northwest, and became a tropical storm on September 12 well away from land. On September 14-15, Ian transitioned into a subtropical cyclone whilst interacting with a frontal zone, before becoming tropical again as it began an extratropical transition.

Ian reached its peak intensity of 60 mph on September 16, before turning extratropical soon after. The system had no known impacts on land during its existence.

SSHWS category 1-min winds Pressure Location Date and time ACE generated
Tropical Storm 40 mph 1007 mbar 20.5N, 49.3W 12/09/2016 0600 UTC 0.1225
Tropical Storm 40 mph 1006 mbar 21.2N, 50.2W 12/09/2016 1200 UTC 0.1225
Tropical Storm 45 mph 1003 mbar 22.2N, 50.6W 12/09/2016 1800 UTC 0.1600
Tropical Storm 45 mph 1002 mbar 23.0N, 51.2W 13/09/2016 0000 UTC 0.1600
Tropical Storm 45 mph 1001 mbar 23.9N, 51.7W 13/09/2016 0600 UTC 0.1600
Tropical Storm 50 mph 999 mbar 24.8N, 52.8W 13/09/2016 1200 UTC 0.2025
Tropical Storm 50 mph 998 mbar 26.0N, 52.4W 13/09/2016 1800 UTC 0.2025
Tropical Storm 50 mph 998 mbar 27.3N, 52.6W 14/09/2016 0000 UTC 0.2025
Tropical Storm 50 mph 998 mbar 28.9N, 53.0W 14/09/2016 0600 UTC 0.2025
Tropical Storm 50 mph 998 mbar 30.5N, 53.5W 14/09/2016 1200 UTC 0.2025
Subtropical Storm 50 mph 998 mbar 32.1N, 53.8W 14/09/2016 1800 UTC 0.2025
Subtropical Storm 50 mph 997 mbar 33.5N, 53.5W 15/09/2016 0000 UTC 0.2025
Subtropical Storm 50 mph 997 mbar 34.9N, 53.0W 15/09/2016 0600 UTC 0.2025
Tropical Storm 50 mph 996 mbar 36.3N, 51.5W 15/09/2016 1200 UTC 0.2025
Tropical Storm 50 mph 996 mbar 38.3N, 49.2W 15/09/2016 1800 UTC 0.2025
Tropical Storm 60 mph 994 mbar 41.2N, 46.8W 16/09/2016 0000 UTC 0.2500
Tropical Storm 60 mph 994 mbar 43.2N, 42.9W 16/09/2016 0600 UTC 0.2500
Total ACE 3.2500

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