1969–70 South-West Indian Ocean cyclone season
Season summary map
Seasonal boundaries
First system formedAugust 19, 1969
Last system dissipatedApril 1, 1970
Strongest storm
NameJane
 • Maximum winds230 km/h (145 mph)
(1-minute sustained)
Seasonal statistics
Total depressions13
Total storms13
Tropical cyclones6
Intense tropical cyclones0
Very intense tropical cyclones2
Total fatalities30
Total damageUnknown
Related articles

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

Systems

Severe Tropical Storm Aline

Severe tropical storm (MFR)
 
DurationAugust 19 – August 22
Peak intensity100 km/h (65 mph) (10-min);

Aline existed from August 19 to August 22.

Tropical Cyclone Blanche

Tropical cyclone (MFR)
 
DurationOctober 7 – October 15
Peak intensity130 km/h (80 mph) (10-min);

October 7 to October 15.

Moderate Tropical Storm Corrine

Moderate tropical storm (MFR)
 
DurationNovember 11 – November 21
Peak intensity85 km/h (50 mph) (10-min);

26 deaths in Comoros and Mozambique.[1]

Moderate Tropical Storm Delphine

Moderate tropical storm (MFR)
 
DurationDecember 29 – January 1
Peak intensity65 km/h (40 mph) (10-min);

Delphine existed from December 29 to January 1.

Tropical Cyclone Diane–Francoise

Tropical cyclone (MFR)
 
DurationJanuary 10 (entered basin) – January 16
Peak intensity130 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)
 
DurationJanuary 7 – January 11
Peak intensity65 km/h (40 mph) (10-min);

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

Tropical Cyclone Genevieve

Tropical cyclone (MFR)
 
DurationJanuary 10 – January 19
Peak intensity120 km/h (75 mph) (10-min);

Four deaths in Madagascar due to flooding.[3]

Tropical Cyclone Hermine

Tropical cyclone (MFR)
 
DurationJanuary 22 – January 27
Peak intensity120 km/h (75 mph) (10-min);

One death on Reunion.[4]

Very Intense Tropical Cyclone Harriet-Iseult

Very intense tropical cyclone (MFR)
 
DurationFebruary 3 (entered basin) – February 13
Peak intensity220 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)
 
DurationFebruary 11 (entered basin) – February 28
Peak intensity230 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)
 
DurationMarch 16 – March 26
Peak intensity85 km/h (50 mph) (10-min);

Katia existed from March 16 to March 26.

Tropical Cyclone Louise

Tropical cyclone (MFR)
 
DurationMarch 20 – April 1
Peak intensity155 km/h (100 mph) (10-min);

Louise existed from March 20 to April 1.

Tropical Cyclone Kathy–Michelle

Tropical cyclone (MFR)
 
DurationMarch 26 (entered basin) – March 30
Peak intensity140 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".
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