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Tropical cyclones in 2024

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This map shows the tracks of all tropical cyclones in the 2024 Worldwide cyclone season . The points show the location of each storm at 6-hour intervals. The colour represents the storm's maximum sust
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2024 had an average amount of storms forming, yet featured a lot of destructive activity. For instance, the West Pacific had an average year of 27 named storms, yet became the fourth most destructive season in the basin's history. Similarly, the North Atlantic had a very costly and active season with 18 storms being named. The East Pacific had a below average year with only 14 storms forming, yet also featured Hurricane John, which would go on to become the fourth costliest hurricane in the basin's history. The North Indian Ocean also recorded below average activity, with only 4 storms being named. The Southern Hemisphere had near-average activity, of which the strongest cyclone, the aforementioned Cyclone Chido, would become the costliest cyclone ever recorded in the South West Indian Ocean basin. The number of Category 5 tropical cyclones that formed this year totalled to six, while 23 major tropical cyclones formed throughout the year, which was slightly below average. The accumulated cyclone energy (ACE) index for 2024 (seven basins combined), as calculated by Colorado State University (CSU) was 621.2 units overall, which was below the 1991-2020 mean of 789.0 units globally.

Tropical cyclones are primarily monitored by 10 warning centers around the world, which are designated as a Regional Specialized Meteorological Center (RSMC) or a Tropical Cyclone Warning Center (TCWC) by the World Meteorological Organization (WMO). These centers are: National Hurricane Center (NHC), Central Pacific Hurricane Center (CPHC), Japan Meteorological Agency (JMA), Indian Meteorological Department (IMD), Météo-France (MFR), Indonesia's Meteorology, Climatology, and Geophysical Agency (BMKG), Australian Bureau of Meteorology (BoM), Papua New Guinea's National Weather Service (PNGNWS), Fiji Meteorological Service (FMS), and New Zealand's MetService. Unofficial, but still notable warning centers include the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA; albeit official within the Philippines), the United States Navy's Joint Typhoon Warning Center (JTWC) and the Brazilian Navy Hydrographic Center.

Global atmospheric and hydrological conditions

After the New Year, the Madden–Julian oscillation's (MJO) amplitude weakened, with its eastward propagation slowing down due to the positive phase of the Indian Ocean Dipole (IOD) and an equatorial Rossby wave. Despite that, the MJO briefly caused El Niño-like wind anomalies to become easterly at the Date Line. There was also a significant increase in convection across the eastern Indian Ocean in January as the Dipole began weakening. However, in the middle of January, the MJO began steadily intensifying, enhancing convection across the Maritime Continent. Despite that, intra-seasonal activity persevered, although the MJO produced convection in the Western Pacific. In Australia, the monsoonal trough's arrival was delayed until January 10, possibly due to the El Niño event. On April 16, the dominant El Niño event ended.

Despite the unseasonably warm temperatures in the North Atlantic, the equatorial Atlantic cooled rapidly into an "Atlantic Niña" due to upwelling caused by shifts in the trade winds and the Atlantic zonal mode. The effects of an Atlantic Niña is not certain but it is contrary to the assumptions that the NOAA used in their forecast of seasonal activity. CSU associated the quietness of the Atlantic during the month of August and the period after Ernesto dissipated–despite predictions of an extremely active peak period–to tropical waves forming too far north, warm upper-level winds causing destabilization, wind shear in the East Atlantic, and factors associated with the MJO.

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