2006–07 South-West Indian Ocean cyclone season

Severe Tropical Storm Clovis lasted from December 2006 to January 2007; it struck eastern Madagascar, killing four people.

The season was most active in February, beginning with Severe Tropical Storm Enok, which formed off eastern Madagascar and later struck the island of St. Brandon.

Over a nine-day period, Gamede dropped 5512 mm (217 in) of rainfall at Commerson Crater, making it one of the wettest tropical cyclones on record.

Less than three weeks after Indlala, Cyclone Jaya struck northeastern Madagascar at a similar location, disrupting ongoing relief efforts and causing one death.

[5][3] There were ten systems that attained the intensity of a moderate tropical storm, which has 10–minute sustained winds of at least 65 km/h (40 mph); this is near the long-term average, but much more active than the previous season.

On November 30, the MFR upgraded the system to Moderate Tropical Storm Anita, estimating peak 10–minute winds of 65 km/h (40 mph).

[5][15][16] While moving close to Mozambique, Anita dropped heavy rainfall in southeast Tanzania, reaching 152 mm (6.0 in) over 24 hours.

[5][19][20][21] Due to its small size, Bondo's winds did not exceed 100 km/h (62 mph) on Agaléga, despite passing close by near peak intensity.

The system drifted to the southwest, encountering an area of high wind shear on December 27, causing the circulation to become exposed and weaken.

A new, larger circulation developed within the system, prompting the MFR to issue new warnings on Tropical Disturbance 5 on December 29, located southeast of Agaléga.

Located in an area of low wind shear, the system slowly organized while moving southwestward, developing more convection and outflow over time.

Dora turned back to the southwest on February 2, and briefly weakened before re-intensifying, possibly the result of an eyewall replacement cycle.

Cyclone Dora maintained peak intensity for about 12 hours before weakening due to cooler, drier air from the southeast.

That day, the JTWC issued a Tropical Cyclone Formation Alert, indicating rapid development of the small weather system.

The nascent system moved northeastward, an unusual track caused by a trough extending northwestward from the remnants of Cyclone Dora, as well as ridge to the north.

Early on February 10, the MFR estimated peak winds of 115 km/h (70 mph), although it is possible the storm was stronger, based on the appearance of an eye-like feature in the convection.

[4][5][28][29] On St. Brandon, Enok produced wind gusts of 160 km/h (99 mph), strong enough to damage iron sheets and a window pane.

Late on February 20, the MFR estimated that Favio attained peak winds of 195 km/h (120 mph), making it an intense tropical cyclone.

[34][35][36] Favio dropped heavy rainfall across southern Africa, causing flooding in eastern Botswana, Lesotho, Malawi, Tanzania, and Zimbabwe.

On March 2, the MFR reclassified Gamede as an extratropical cyclone, and the agency tracked the storm for four more days as the circulation again stalled before drifting westward.

[40] When the storm stalled for a few days, it resulted in a prolonged period of heavy rainfall and high tides for the Mascarene Islands.

A large ridge over western Australia steered the low to the west-southwest, bringing it into the south-west Indian Ocean on February 21.

The former Cyclone Humba turned to the southeast and was tracked by the MFR until March 4, as it moved across the southern Indian Ocean, back into the Australian region.

Early on March 15, the cyclone made landfall in northeastern Madagascar on the Masoala Peninsula near Antalaha, still at its peak intensity according to the MFR.

The cyclone also dropped heavy rainfall in the eastern portion of the country, reaching 585.4 mm (23.05 in) over 48 hours in Antsohihy in northern Madagascar.

A day later, the system intensified into Moderate Tropical Storm Jaya, taking advantage of favorable conditions including low wind shear.

Also on March 30, the JTWC classified the storm as Tropical Cyclone 22S, and later that day Jaya began to rapidly intensify; over 24 hours, its pressure dropped by 50 hPa (1.4765 inHg).

On the same day, Jaya passed about 165 km north of St. Brandon, which recorded a 72 km/h (45 mph) wind gust and 11.7 mm (0.46 in) of precipitation.

Jaya again weakened as it approached eastern Madagascar, and it moved ashore about 25 km (15 mi) south of Sambava, with winds of around 135 km/h (85 mph).

[6] Jaya rapidly deteriorated as it continued westward across the island, emerging into the Mozambique Channel as a tropical disturbance on April 4.