Science · 11 pages · 22 min
How storms get their names
The name is a handle. The danger is in the forecast.
From the opening
Tropical cyclones get short names so forecasters, ships, and the public can talk about one storm without confusing it with another in the same ocean.
The lists are kept under the World Meteorological Organization, through regional bodies. The point of a name is communication. “The storm near 22 north, 70 west” is a sentence people garble on a bad radio line. “Maria” is a sentence they repeat. Before names, storms were identified by positions, dates, or, in some older systems, by letters. Names won because they can be said quickly and remembered, which matters when more than one storm is on the map.
In the Atlantic basin, six lists rotate. A name that is not retired comes back about every six years. The set has long mixed languages used along the coasts those storms threaten — English, Spanish, French — so a warning can be said out loud without a tangle. The letters Q, U, X, Y, and Z are skipped because there are not enough usable names starting with them. When a season runs through the list, a supplemental list is used. The old habit of falling back on the Greek alphabet was dropped after 2020, a year so crowded that the letters themselves became confusing and several had to be retired.
A name is retired when a storm was so deadly or costly that reusing it would be confusing or painful. Retirement is a decision after the season, made by the regional committee, not a badge printed on the wind speed. Katrina and Sandy left the Atlantic lists for that reason. A destructive storm’s name is replaced. A mild one keeps its place in the rotation and comes around again. Hearing a familiar name is not a forecast of a familiar storm. It is the same label, six years later, on a different system of clouds.
Basins do not all work the same way. The Northwest Pacific, where the storms are called typhoons, uses a list of names contributed by member countries, and those names are not personal names in the Atlantic style. They are reused too, and they are also retired when a storm is catastrophic. The North Indian Ocean has its own list. So does the Australian region, and the South-West Indian Ocean. If you follow storms in only one ocean, the other lists sound arbitrary. They are arbitrary in the way all names are, and they are stable on purpose, so a warning agency does not invent a label in the middle of the night.
The rest of the brief — the later sections and the reading notes — opens after Stripe confirms payment.
Inside
- Who keeps the lists
- Why some names never return
- Hurricane, typhoon, cyclone — one physics
- What the name does not tell you about surge and rain
Sources
- World Meteorological Organization tropical cyclone naming, by regional body
- National Hurricane Center practice for Atlantic lists, the six-year rotation, retirement, and the end of the Greek-alphabet backup
- Regional terms — hurricane, typhoon, cyclone — for the same kind of storm, and the limits of the Saffir-Simpson wind scale