1969–70 South-West Indian Ocean cyclone season
Season summary map
Seasonal boundaries
First system formed	August 19, 1969
Last system dissipated	April 1, 1970
Strongest storm
Name	Jane
• Maximum winds	230 km/h (145 mph) (1-minute sustained)
Seasonal statistics
Total depressions	13
Total storms	13
Tropical cyclones	6
Intense tropical cyclones	0
Very intense tropical cyclones	2
Total fatalities	30
Total damage	Unknown
Related articles
1969–70 Australian region cyclone season 1969–70 South Pacific cyclone season
South-West Indian Ocean tropical cyclone seasons 1967–68, 1968–69, 1969–70, 1970–71 1971–72

The 1969–70 South-West Indian Ocean cyclone season was an active cyclone season.

Systems

Severe Tropical Storm Aline

Severe tropical storm (MFR)
Duration	August 19 – August 22
Peak intensity	100 km/h (65 mph) (10-min);

Aline existed from August 19 to August 22.

Tropical Cyclone Blanche

Tropical cyclone (MFR)
Duration	October 7 – October 15
Peak intensity	130 km/h (80 mph) (10-min);

October 7 to October 15.

Moderate Tropical Storm Corrine

Moderate tropical storm (MFR)
Duration	November 11 – November 21
Peak intensity	85 km/h (50 mph) (10-min);

26 deaths in Comoros and Mozambique. ^[1]

Moderate Tropical Storm Delphine

Moderate tropical storm (MFR)
Duration	December 29 – January 1
Peak intensity	65 km/h (40 mph) (10-min);

Delphine existed from December 29 to January 1.

Tropical Cyclone Diane–Francoise

Tropical cyclone (MFR)
Duration	January 10 (entered basin) – January 16
Peak intensity	130 km/h (80 mph) (10-min);

This system entered the basin on January 7 and dissipated on January 17.

Moderate Tropical Storm Eliane

Moderate tropical storm (MFR)
Duration	January 7 – January 11
Peak intensity	65 km/h (40 mph) (10-min);

The storm struck western Madagascar, bringing rainfall. ^[2]

Tropical Cyclone Genevieve

Tropical cyclone (MFR)
Duration	January 10 – January 19
Peak intensity	120 km/h (75 mph) (10-min);

Four deaths in Madagascar due to flooding. ^[3]

Tropical Cyclone Hermine

Tropical cyclone (MFR)
Duration	January 22 – January 27
Peak intensity	120 km/h (75 mph) (10-min);

One death on Reunion. ^[4]

Very Intense Tropical Cyclone Harriet-Iseult

Very intense tropical cyclone (MFR)
Duration	February 3 (entered basin) – February 13
Peak intensity	220 km/h (140 mph) (10-min);

Iseult existed from February 2 to February 15.

Very Intense Tropical Cyclone Josephine-Jane

Very intense tropical cyclone (MFR)
Duration	February 11 (entered basin) – February 28
Peak intensity	230 km/h (145 mph) (10-min);

It was named Josephine in its formative stages due to being in what was considered the Australian basin at the time. ^[5]

Moderate Tropical Storm Katia

Moderate tropical storm (MFR)
Duration	March 16 – March 26
Peak intensity	85 km/h (50 mph) (10-min);

Katia existed from March 16 to March 26.

Tropical Cyclone Louise

Tropical cyclone (MFR)
Duration	March 20 – April 1
Peak intensity	155 km/h (100 mph) (10-min);

Louise existed from March 20 to April 1.

Tropical Cyclone Kathy–Michelle

Tropical cyclone (MFR)
Duration	March 26 (entered basin) – March 30
Peak intensity	140 km/h (85 mph) (10-min);

Michelle entered the basin on March 24 and dissipated on March 30.

See also

• Atlantic hurricane seasons: 1969, 1970
• Eastern Pacific hurricane seasons: 1969, 1970
• Western Pacific typhoon seasons: 1969, 1970
• North Indian Ocean cyclone seasons: 1969, 1970

References