Real-time tropics info
satellite image of the North Atlantic, 18 UTC 31 Aug 2023

current season's activity

The below plots show daily cumulative (added up) Accumulated Cyclone Energy (ACE) from the North Atlantic and the eastern North Pacific. Values are calculated from the 00, 06, 12, and 18 UTC entries in the National Hurricane Center operational best-track ("b-deck") files. ACE includes times when tropical or subtropical cyclones had maximum sustained winds of at least 34 kt. Plots are updated once per day after the 18 UTC intensity estimate becomes available. Click each image for a larger version:


Above ACE values omit subtropical and tropical cyclones prior to 1 May. CNP totals include all TC times west of 140°W and ENP totals include all TC times east of 140°W, thus a TC that formed in the ENP and later entered the CNP (such as 2023's Hurricane Dora) contributes some ENP ACE and some CNP ACE.