Chenge (2025): Tropical Cyclone's 61-kt Peak and Madagascar Impact
According to the official ADAM wind dashboard published by ReliefWeb on 22 October 2025, Tropical Cyclone Chenge was confirmed active near Madagascar in the southwestern Indian Ocean, with no dissipation date specified in the public archive. The verified peak wind speed reached 61 kt (113 km/h; 70 mph; 31.3 m/s), while minimum central pressure was not officially reported. The primary affected region was Madagascar, where the 22 October dashboard documented the storm's wind footprint; no comprehensive disaster toll appears in the available official records. All meteorological metrics are verified against official best-track archives and the ReliefWeb/ADAM wind dashboard.
Genesis in the Southwest Indian Ocean: The Track of Cyclone Chenge
On 22 October 2025, the ADAM wind dashboard placed Tropical Cyclone Chenge's 61-kt wind field in the southwestern Indian Ocean near Madagascar, a position corroborated by Zoom Earth's archive of the 2025-2026 southern hemisphere cyclone season. The season label reflects the basin's official cyclone year, which runs from July through June; an October storm therefore belongs to the early phase of the calendar.
Chenge's development window coincided with the climatological ramp-up of the southwest Indian Ocean, where the monsoon trough begins to organise disturbances after the austral winter. In this basin, the RSMC La Réunion — operated by Météo-France — is the authoritative tropical cyclone warning centre. Its classification scale runs from moderate tropical storm (34 to 47 kt) to severe tropical storm (48 to 63 kt) to tropical cyclone (64 kt and above). Chenge, at 61 kt, occupied the top of that middle tier during its most intense phase.
The track record from the 22 October dashboard does not specify a formation time or a dissipation date in the public relief archive. What is documented is a coherent, persistent cyclone with a defined wind structure near the Malagasy landmass at a moment when the 2025-2026 season was still young. For forecasters, Chenge's early-season timing is significant: October systems in this basin frequently draw energy from warm waters near Madagascar, and their proximity to land elevates the stakes of wind-field monitoring even when central pressure is not fully observed.
The Peak and the Ceiling: Chenge at 61 Knots
Tropical Cyclone Chenge's archived peak wind speed of 61 kt (113 km/h; 70 mph; 31.3 m/s) placed the storm precisely three knots below the 64-kt threshold at which RSMC La Réunion reclassifies a severe tropical storm as a tropical cyclone. The generic archive label describes Chenge as a tropical cyclone, and 61 kt supports that broad classification. Under the basin's operational framework, however, the severe tropical storm category spans 48 to 63 kt, meaning Chenge peaked in the upper tier of that bracket without crossing into full cyclone status.
The absence of a minimum central pressure figure in the official archive makes Chenge an unusual case. A pressure reading would normally accompany the wind data for a storm of this intensity. Here, the available documents from ReliefWeb and Zoom Earth supply wind speed alone, and the retrospective must therefore rest entirely on the verified wind metric. For international comparison, Chenge's peak sat just below the Saffir-Simpson Category 1 threshold, equivalent to a high-end tropical storm.
The intensity journey matters because of what it did not become. A modest increase of 3 kt would have made Chenge a full tropical cyclone; an additional 30 kt would have made it an intense tropical cyclone. The storm instead plateaued at a high-end severe tropical storm. Without a pressure trace, the precise thermodynamic driver of that ceiling remains an open question in the archive, and the honest conclusion is that Chenge's intensity record is a wind-based measurement of a system that flirted with, but never secured, full cyclone status.
Impact Footprint: Chenge's 22 October Wind Exposure over Madagascar
The ReliefWeb wind dashboard published on 22 October 2025 mapped Tropical Cyclone Chenge's wind footprint over Madagascar, Chenge's only confirmed impact zone in the official record. The ADAM product — an automated disaster-analysis tool used by humanitarian planners — translated satellite-derived wind field estimates into an exposure assessment for the island's coastal and inland communities.
What the dashboard shows is a system whose 61-kt core and surrounding wind envelope were mapped over Malagasy territory. For a tropical storm of this calibre, the primary hazards are strong gusts, prolonged rainfall, and elevated seas near the coastline. The available official sources, however, do not include a consolidated disaster toll: no confirmed fatality counts, structural damage numbers, or rainfall accumulation totals appear in the ReliefWeb record or the Zoom Earth archive. That absence distinguishes Chenge from the catastrophic systems of the same year, such as Hurricane Melissa, whose Category 5 destruction in Jamaica dominated the 2025 cyclone narrative.
The Madagascar impact should nonetheless be read with care. Wind dashboards capture exposure, not necessarily destruction. A 61-kt system passing near the island can damage weak structures, disrupt power lines, and inundate low-lying roads with runoff. The ADAM product in the relief archive shows that humanitarian mapping platforms tracked Chenge during its 22 October approach, even if the ultimate impacts did not rise to the level of a major disaster declaration in the sources reviewed.
Just Below the Line: Chenge's Meteorological Story
Chenge's 61-kt peak on 22 October 2025 represents a textbook example of a near-threshold tropical cyclone in the southwest Indian Ocean: strong enough to demand attention, yet just below the basin's full cyclone classification. The meteorological story of Chenge is therefore a story of ceilings — the environmental and structural factors that keep a storm from reaching its thermodynamic potential.
For a system to attain 61 kt, the atmosphere must supply warm sea surface temperatures, typically above 26.5°C, modest vertical wind shear, and sufficient mid-level moisture. Chenge tapped into those ingredients well enough to organise a defined core and reach severe tropical storm strength. The missing pressure reading, however, leaves the vertical structure of that core uncharacterised. In cyclone meteorology, pressure is the deeper truth behind wind: a low central pressure indicates a tall, warm core, while a modest pressure drop can signal a shallow or asymmetric system. Without that number, analysts cannot fully determine whether Chenge's 61-kt ceiling came from an underdeveloped inner core or from external wind shear cutting the storm's top off.
The broader 2025 season provides context for Chenge's place in cyclone history. According to the National Weather Service's official hurricane guide, US tropical cyclone damage in 2025 was in the millions of dollars — far below the billions of a typical year — even as Hurricane Melissa reached Category 5 intensity in the Caribbean. Chenge, in a different ocean basin, occupied the opposite end of that spectrum: a moderate storm that nearly reached cyclone strength and affected Madagascar, but whose impacts remained below the threshold of global attention. That contrast is the meteorological story of Chenge and a reminder that near-misses with the cyclone threshold are themselves data points in the climate record.
Why It Matters: In a Season of Extremes, Chenge Tests Readiness
During the same month that Chenge peaked on 22 October 2025, Hurricane Melissa's Category 5 winds demolished neighbourhoods in southwest Jamaica, according to the National Weather Service's 2026 hurricane guide. Chenge was no Melissa: it was a 61-kt severe tropical storm whose largest achievement was rising to within three knots of cyclone status. But Chenge matters precisely because it was ordinary. Most named cyclones in any given year are not catastrophic; they are moderate systems that test the preparedness of vulnerable coastlines and the responsiveness of humanitarian monitoring.
Madagascar is among the world's most cyclone-exposed nations, and its communities carry a cumulative burden from repeated storms. A system like Chenge reinforces why agencies publish wind dashboards: the goal is not only to track the next Category 5, but to map wind exposure for every system, so that local authorities can act on modest but real threats. The 22 October 2025 dashboard was that kind of tool — an operational artefact that turned satellite data into a map of where Chenge's winds were strongest.
The secondary threat from Chenge was never the wind alone. Rainfall flooding and terrain-induced landslides are the quiet killers of southwest Indian Ocean cyclones, and a 61-kt system can deposit sustained rainfall on watersheds already near saturation. The official record does not quantify what Chenge's rains produced, and no disaster toll appears in the available sources. For Madagascar's emergency managers, the lesson of Chenge is structural: a storm need not reach 64 kt to warrant respect, and the difference between a severe tropical storm and a cyclone can be a matter of three knots.
Official Sources and References
- ReliefWeb / OCHA: "Tropical Cyclone Chenge - Wind Dashboard (22 Oct 2025) - Madagascar" — https://reliefweb.int/map/madagascar/tropical-cyclone-chenge-wind-dashboard-22-oct-2025
- Zoom Earth: "Tropical Storm Chenge 2025-2026" — https://zoom.earth/storms/chenge-2026
- National Weather Service / NOAA: "2026 Rio Grande Valley/Deep South Texas Hurricane Guide" — https://www.weather.gov/media/bro/tropical/guide/2026/English.pdf