Global Tropical Cyclone Tracks & ENSO

IBTrACS best-track data across all 6 ocean basins · El Niño / La Niña years classified by NOAA/CPC ONI (ASO season, threshold ±0.5 °C) · Sources: IBTrACS & NOAA/CPC

Tropical Cyclone Tracks by Year — All Basins

● El Niño year ● La Niña year ● Neutral year
TD <34 kt TS 34–63 kt Cat 1 64–82 kt Cat 2 83–95 kt Cat 3 96–112 kt Cat 4 113–136 kt Cat 5 ≥137 kt

Dot colour = wind speed (Saffir-Simpson scale). Shaded regions = basin boundaries. Use ▶ Play to animate, or drag the slider.

Track Density Difference — El Niño (161 months) vs All Other (508 months)

Each 2.5° × 2.5° cell shows wind-weighted storm activity (each observation contributes its wind speed in kt, so intense storms count more than weak ones), averaged per year, differenced between El Niño and all other years (La Niña + Neutral). Red = more intense activity during El Niño · Blue = less intense activity during El Niño.