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Monday, 01 July 2024 18:27

Tropical Cyclone Freddy is the longest tropical cyclone on record at 36 days: WMO

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  • Freddy was 36 days at tropical storm status or higher, beating record of John (1994) - 




VOInews, Geneva : The World Meteorological Organization (WMO) has declared Tropical Cyclone Freddy to be the longest-lasting tropical cyclone on record, at 36 days. Freddy crossed the Indian Ocean basin, starting off the coast of Northwest Australia and reached southern Africa, in February and March 2023. It caused major human and economic losses in the worst-affected countries.

A WMO international committee of experts working under the auspices of the Weather and Climate Extremes Archive conducted a detailed analysis and verification of the distance and duration. The evaluation committee recognized Tropical Cyclone (TC) Freddy’s duration of 36.0 days at tropical storm status or higher as the new world record for the longest tropical cyclone duration. 

“Freddy was a remarkable tropical cyclone, not only for its longevity but also for its ability to survive multiple land interactions, which unfortunately had significant consequences for southeast African populations," says Chris Velden, committee member and tropical cyclone/satellite expert from the University of Wisconsin, USA.

“This investigation highlights the meticulous care that the WMO undertakes in certifying all weather observations. Such painstaking evaluation provides the critical confidence that our global records of all weather phenomena are properly measured,” said Randall Cerveny, Rapporteur of Climate and Weather Extremes for WMO.

According to a release received by Voice of Indonesia on Monday (01/07/24), WMO will update its Archive of Weather and Climate Extremes to reflect the new record. The archive includes the world’s highest and lowest temperatures, rainfall, heaviest hailstone, longest dry period, maximum gust of wind, longest lightning flash and weather-related mortalities. It is used by weather historians and, increasingly, by policy makers.

“The extremes presented for adjudication for the WMO Weather and Climate Extremes Archive are ‘snapshots’ of our current climate. It is possible, and indeed likely, that greater extremes will occur in the future. When such observations are made, new WMO evaluation committees will be formed to adjudicate these observations,” said Randall Cerveny.

The WMO evaluation committee consisted of experts from the Tropical Cyclone Warning Center Melbourne (Bureau of Meteorology, Australia), the Regional Specialized Meteorological Centre (RSMC) La Réunion (Météo-France, France) that forecasted TC Freddy, as well as scientists from Spain, Canada, Hong Kong China, and the United States//VOI

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