How do tropical cyclones behave and form across global basins?

Tropical cyclones form across major oceanic basins worldwide and are monitored by multiple specialized warning centers. In 2026, dozens of storms developed, bringing severe impacts such as high winds, heavy rainfall, and substantial economic damage. Storm intensity varies greatly, with systems categorized by sustained wind speeds and minimum barometric pressure.

What we know

• Tropical cyclones form across seven major bodies of water known as tropical cyclone basins. [2]
• Weather agencies name tropical cyclones when they attain maximum sustained winds of 35 knots. [2]
• Ten official Regional Specialized Meteorological Centers and Tropical Cyclone Warning Centers monitor global tropical cyclones. [2]
• Post-tropical cyclones are former tropical systems that no longer possess enough tropical qualities to remain classified as tropical cyclones. [3]

Where to go next

• how it workedWhat happens when a tropical cyclone loses its tropical traits?
• a case in pointHow did the 2026 Pacific typhoon season unfold?
• what caused itWhat caused the high destruction during the 2025-2026 South-West Indian Ocean cyclone season?
• the bigger pictureHow do meteorological organizations monitor global storm activity?
• compared withHow does accumulated cyclone energy measure storm seasons?
• an unexpected connectionHow can storms interact through the Fujiwara effect?The 2026 Pacific typhoon season demonstrated that multiple storms, such as Etau and Bang-lang, can undergo a Fujiwara effect when interacting closely.

Sources

• [1]Tropical cyclones in 2026 (Wikidata Q137784260) · CC0 1.0
• [2]Tropical cyclones in 2026 · CC BY-SA 4.0
• [3]Post-tropical cyclone · CC BY-SA 4.0
• [4]2026 Pacific typhoon season · CC BY-SA 4.0
• [5]2025–26 South-West Indian Ocean cyclone season · CC BY-SA 4.0