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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.

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.

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.

Tropical Cyclone Hermine

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

One death on Reunion.

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.

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

1. "Global tropical/Extratropical cyclone climatic atlas".
2. "Global tropical/Extratropical cyclone climatic atlas".
3. "Global tropical/Extratropical cyclone climatic atlas".
4. "Global tropical/Extratropical cyclone climatic atlas".
5. "Global tropical/Extratropical cyclone climatic atlas".

• South-West Indian Ocean cyclone seasons