tinychaseCyclone kiosks · the year, 1980 to 2025
The Season Clock
Somewhere on Earth a tropical cyclone is running on most days of the year, because the two hemispheres take turns. Each panel is one ocean basin and the shape is how many storms were active on each day of the year across 46 seasons; the darker fill is the hurricane-strength share. The Atlantic is the sharpest peak on the planet: one date, 10 September, and a long quiet either side.
The whole planet
Storm-days on each calendar day, every basin together. The northern summer peak and the southern one interlock, and the world is never quiet for long.
Data: TerraPulse tc dex (IBTrACS-style tracks; US federal public domain), storms whose first fix falls in 1980 to 2025, fetched 2026-09-27. A storm-day is one storm present on one calendar day, counted once however many fixes it has that day; the hurricane share counts days on which the storm was at 64 kt or more. Days sit on a leap-year calendar, and 29 February, which exists in a quarter of the years, is scaled by four to a per-year rate. "Days storms peaked" is the date of each storm's highest wind, which is undefined for storms with no wind values (mostly older and outside the NHC basins). The South Atlantic, with three storms on record, is left out.