| 1970–71 South-West Indian Ocean cyclone season |
|---|
 Season summary map |
| Seasonal boundaries |
|---|
| First system formed |
16 September 1970 |
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| Last system dissipated |
21 March 1971 |
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| 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 |
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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 Felicie
|
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) |
|---|
See also
- Atlantic hurricane seasons: 1970, 1971
- Eastern Pacific hurricane seasons: 1970, 1971
- Western Pacific typhoon seasons: 1970, 1971
- North Indian Ocean cyclone seasons: 1970, 1971
