Cyclone Cheneso

[5] The origin of Cheneso can be traced back to an area of persistent showers and thunderstorms south of Diego Garcia, first noted by the Météo–France (MFR) on 10 January 2023.

[7] The system was located in a favorable environment for intensification, as well as warm sea surface temperatures, low to high vertical wind shear.

[8] Despite this, the MFR initiated advisories for the zone of disturbed weather, while the JTWC issued a Tropical Cyclone Formation Alert (TCFA) on 17 January.

Deep convection was wrapping into the curved band pattern, prompting the MFR to upgrade it to a tropical depression status.

[13] At 12:00 UTC on 18 January, the MFR also upgraded the system into a moderate tropical storm status, and the Meteo Madagascar named it Cheneso.

[16] Cheneso continued moving westwards, and by the next day, it had made landfall over northern Madagascar; the JTWC released its final warning on the storm.

[19] During 21 January, Cheneso began to emerge into the Mozambique Channel, the JTWC resumed monitoring and stated the system had the potential to re–develop.

[25][26] Cheneso resumed its organizing trend soon afterward, and at 00:00 UTC on 24 January, the MFR upgraded the system to a tropical depression status.

[29][30] By 03:00 UTC on 25 January, Cheneso strengthened into a Category 1–equivalent tropical cyclone on the Saffir–Simpson hurricane wind scale (SSHWS), as it neared the coast of Madagascar.

[35] By 12:00 UTC on 26 January, Cheneso was downgraded to severe tropical storm status by the MFR, as it headed in a southeast direction.

[36] By the next day, Cheneso was downgraded to tropical storm status by the JTWC as its LLCC and its surrounding convection became a fragmented cold band.

[40] At 03:00 UTC on 28 January, the JTWC estimated that Cheneso had strengthened into a Category 2–equivalent tropical cyclone, with 1–minute sustained winds at 155 km/h (100 mph).

[48] Local authorities issued an alert of heavy rain in the country's central and western regions, posing an imminent risk of flooding and landslides.

Map plotting the storm's track and intensity, according to the Saffir–Simpson scale [ nb 1 ]
Map key
Tropical depression (≤38 mph, ≤62 km/h)
Tropical storm (39–73 mph, 63–118 km/h)
Category 1 (74–95 mph, 119–153 km/h)
Category 2 (96–110 mph, 154–177 km/h)
Category 3 (111–129 mph, 178–208 km/h)
Category 4 (130–156 mph, 209–251 km/h)
Category 5 (≥157 mph, ≥252 km/h)
Unknown
Storm type
triangle Extratropical cyclone , remnant low, tropical disturbance, or monsoon depression
Cheneso making landfall in Madagascar on 19 January
MODIS satellite imagery of flooding in Madagascar on 29 January