Tropical Storm Chalane information

Severe Tropical Storm Chalane

Severe Tropical Storm Chalane on 29 December, shortly before landfall in Mozambique
Meteorological history
Formed	23 December 2020
Dissipated	3 January 2021
Severe tropical storm
10-minute sustained (MF)
Highest winds	110 km/h (70 mph)
Highest gusts	155 km/h (100 mph)
Lowest pressure	983 hPa (mbar); 29.03 inHg
Category 1-equivalent tropical cyclone
1-minute sustained (SSHWS/JTWC)
Highest winds	130 km/h (80 mph)
Lowest pressure	985 hPa (mbar); 29.09 inHg
Overall effects
Fatalities	7 total
Damage	Unknown
Areas affected	Madagascar, Mozambique, Zimbabwe, Botswana, Namibia
IBTrACS / [1]
Part of the 2020–21 South-West Indian Ocean cyclone season

Severe Tropical Storm Chalane was the first of three consecutive tropical cyclones that struck Mozambique in the 2020-21 South-West Indian Ocean cyclone season. As the fourth tropical depression, third named storm, and second severe tropical storm of the season, Chalane developed out of a zone of disturbed weather which was first monitored RSMC La Réunion on 19 December. Despite conditions slowly becoming unfavorable, the system formed into a tropical depression on 23 December due to the presence of a Kelvin wave and an equatorial Rossby wave, as well as warm sea surface temperatures. The depression soon strengthened into Tropical Storm Chalane on the following day. Chalane made landfall on Madagascar on 26 December and weakened, before emerging into the Mozambique Channel a couple days later. Subsequently, Chalane restrengthened, before making landfall on Mozambique on 30 December. The system weakened as it moved inland, degenerating into a remnant low later that day. However, Chalane's remnants continued moving westward for another several days, emerging into the South Atlantic on 3 January, before dissipating later that day.

As Chalane strengthened, the coordinating of emergency supplies began in Madagascar, Mozambique, and Zimbabwe, and the Joint Typhoon Warning Center issued a Tropical Cyclone Formation Alert (TCFA). Late December 26, Chalane made landfall in Madagascar, causing flooding. But overall, there was little damage. Chalane was downgraded to a tropical depression as it passed through Madagascar. On 30 December, Chalane, now a Severe Tropical Storm, made impact on Mozambique, several institutions were damaged, but Chalane made less damage than expected. The same day, Chalane made landfall in Zimbabwe, before downgrading to a remnant low. The remnant has been causing some rainfall in neighboring countries. Overall, 7 people died in Mozambique and the damage toll of the storm is unknown, but was presumed to be minimal.