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

The "ingredients" for a TC

I'm developing a resource that covers the factors affecting how tropical cyclones (TCs) can form. It links to additional content around the internet that's free to access! Note that any MetEd links require an account, which is also free.


regional SST monitoring

Click here for area-averaged SST charts computed for various ocean sectors (updated daily). A complementary page showing Argo float profiles and SST or SST anomaly maps for a subset of regions is available here (updated weekly; requests for higher frequency will be considered but not guaranteed).


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. Faint lines represent individual seasons from 1988 to 2023. 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. For TCs that form in the North Atlantic and then enter the ENP (e.g., 2022 Bonnie), ACE is assigned based on the TC's geographic location. You're welcome to freely use these images and data with attribution.