1970–71 South-West Indian Ocean cyclone season

1970–71 South-West Indian Ocean cyclone season
Season summary map
Seasonal boundaries
First system formed	16 September 1970
Last system dissipated	21 March 1971
Strongest storm

Name	Polly

Seasonal statistics
Total disturbances	16
Total depressions	15
Total storms	13
Tropical cyclones	8
Intense tropical cyclones	4
Very intense tropical cyclones	1
Total fatalities	Unknown
Total damage	Unknown
Related articles
1970–71 Australian region cyclone season 1970–71 South Pacific cyclone season

The 1970–71 South-West Indian Ocean cyclone season was a below-average cyclone season. The season officially ran from November 1, 1970, to April 30, 1971.

Systems

Tropical Disturbance Andree

Tropical disturbance (MFR)
Tropical depression (SSHWS)

Duration	September 16 – September 19
Peak intensity	45 km/h (30 mph) (10-min)

Tropical Depression Betsy

Tropical depression (MFR)
Tropical storm (SSHWS)

Duration	October 1 – October 8
Peak intensity	55 km/h (35 mph) (10-min)

Moderate Tropical Storm Andrea-Claudine

Moderate tropical storm (MFR)
Tropical storm (SSHWS)

Duration	November 10 (Crossed 80°E) – November 13
Peak intensity	65 km/h (40 mph) (10-min) 970 hPa (mbar)

Andrea-Claudine, 10 November to 13 November 1970 in central Indian Ocean

Unknown Storm Carmen


Duration	November 20 – November 30
Peak intensity	Winds not specified

Intense Tropical Cyclone Hilary-Dominique

Intense tropical cyclone (MFR)
Category 3 tropical cyclone (SSHWS)

Duration	December 12 – December 28
Peak intensity	165 km/h (105 mph) (10-min)

Hilary, 11 to 18 December 1970 in central Indian Ocean

Tropical Depression Edith

Tropical depression (MFR)
Tropical storm (SSHWS)

Duration	January 5 – January 10
Peak intensity	55 km/h (35 mph) (10-min)

Tropical Cyclone Felcie

Tropical cyclone (MFR)
Category 1 tropical cyclone (SSHWS)

Duration	January 17 – February 6
Peak intensity	120 km/h (75 mph) (10-min)

Tropical Cyclone Myrtle-Ginette

Tropical cyclone (MFR)
Category 2 tropical cyclone (SSHWS)

Duration	January 15 – January 31
Peak intensity	150 km/h (90 mph) (10-min)

Myrtle/Ginette, 15 to 19 January 1971 near Cocos Island and moved west

Unknown Storm Polly


Duration	January 23 – January 28
Peak intensity	Winds not specified

Polly, 20 to 29 January 1971 in central Indian Ocean

Tropical Cyclone Helga

Tropical cyclone (MFR)
Category 2 tropical cyclone (SSHWS)

Duration	February 2 – February 15
Peak intensity	150 km/h (90 mph) (10-min)

Tropical Cyclone Iphigenie

Tropical cyclone (MFR)
Category 1 tropical cyclone (SSHWS)

Duration	February 10 – February 17
Peak intensity	120 km/h (75 mph) (10-min) 970 hPa (mbar)

Severe Tropical Storm Joelle

Severe tropical storm (MFR)
Category 1 tropical cyclone (SSHWS)

Duration	February 15 – February 25
Peak intensity	100 km/h (65 mph) (10-min)

Tropical Cyclone Kalinka

Tropical cyclone (MFR)
Category 2 tropical cyclone (SSHWS)

Duration	February 16 – February 26
Peak intensity	140 km/h (85 mph) (10-min)

Tropical Cyclone Yvonne-Lise

Tropical cyclone (MFR)
Category 1 tropical cyclone (SSHWS)

Duration	February 21 – March 3
Peak intensity	130 km/h (80 mph) (10-min)

Intense Tropical Cyclone Maggie-Muriel

Intense tropical cyclone (MFR)
Category 3 tropical cyclone (SSHWS)

Duration	March 7 – March 18
Peak intensity	165 km/h (105 mph) (10-min) 951 hPa (mbar)

Maggie/Muriel, 7 to 20 March 1971 in central Indian Ocean

Severe Tropical Storm Nelly

Severe tropical storm (MFR)
Category 1 tropical cyclone (SSHWS)

Duration	March 12 – March 22
Peak intensity	110 km/h (70 mph) (10-min)

References

1970–1979 South-West Indian Ocean cyclone seasons
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