1970–71 South-West Indian Ocean cyclone season

Systems

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PlotData= barset:Hurricane width:11 align:left fontsize:S shift:(4,-4) anchor:till from:16/09/1970 till:19/09/1970 color:TD text:"Andree (TDi)" from:01/10/1970 till:09/10/1970 color:TS text:"Betsy (MTS)" from:10/11/1970 till:13/11/1970 color:TS text:"Andrea-Claudine (MTS)" from:11/11/1970 till:18/11/1970 color:IT text:"Hilary-Dominique (ITC)" from:05/01/1971 till:10/01/1971 color:TS text:"Edith (MTS)" from:17/01/1971 till:06/02/1971 color:TC text:"Felicie (TC)" from:19/01/1971 till:31/01/1971 color:TC text:"Myrtle-Ginette (TC)" from:02/02/1971 till:15/02/1971 color:TC text:"Helga (TC)" barset:break from:10/02/1971 till:17/02/1971 color:TC text:"Iphigenie (TC)" from:15/02/1971 till:25/02/1971 color:TC text:"Joelle (STS)" from:16/02/1971 till:26/02/1971 color:TC text:"Kalinka (TC)" from:21/02/1971 till:03/03/1971 color:TC text:"Yvonne-Lise (TC)" from:07/03/1971 till:18/03/1971 color:IT text:"Maggie-Muriel (ITC)" from:12/03/1971 till:22/03/1971 color:TC text:"Nelly (TC)"

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Tropical Disturbance Andree

| 10-min winds = 25 | 1-min winds = 30

Moderate Tropical Storm Betsy

| 10-min winds = 35 | 1-min winds = 35

Moderate Tropical Storm Andrea–Claudine

| 10-min winds = 35 | 1-min winds = 35

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

Intense Tropical Cyclone Hilary–Dominique

| 10-min winds = 90 | 1-min winds = 100

• Hilary, 11 to 18 December 1970 in central Indian Ocean

Moderate Tropical Storm Edith

| 10-min winds = 35 | 1-min winds = 35

Tropical Cyclone Felicie

| 10-min winds = 65 | 1-min winds = 75 Cyclone Felicie was a slow moving cyclone that made a large number of landfalls in Madagascar, 4, in addition to a single landfall in Mozambique, which reportedly killed 30 people. The storm followed a very erratic track due to unusual steering patterns, and went through many cycles of strengthening and weakening as it slowly trudged to the south. Felicie reached Tropical Cyclone status three separate times, before finally becoming extratropical southwest of Madagascar.

Tropical Cyclone Myrtle–Ginette

| 10-min winds = 80 | 1-min winds = 90 On January 19, Severe Tropical Cyclone Myrtle entered the South-West Indian Ocean; therefore, it was assigned a second name, Ginette. The next day, Ginette reached hurricane status and developed a clear eye as it traveled generally west-southwestward. On January 22, Ginette curved southwestward and came within 72 km of the island of Rodrigues. On Rodrigues, winds as high as 150 km/h were recorded along with a minimum barometric pressure of 989 mbar. Throughout the next two days, Ginette approached the island of Reunion, causing stormy weather that lasted until January 29. In Reunion, swells associated with Ginette reached 6 m at times. On January 25, Ginette became stationary while located south of Reunion. The next day, Ginette encountered a ridge which caused it to execute a small clockwise loop. After completing the loop, Ginette accelerated southeastward and gradually weakened. By January 31, Ginette had transitioned into an extratropical cyclone.

Tropical Cyclone Helga

| 10-min winds = 80 | 1-min winds = 90 On February 8, Helga passed southeast of Réunion and Mauritius, bringing heavy rainfall to the former island, reaching 926 mm at Commerson. Two people died on the island due to drowning.

Tropical Cyclone Tilly-Iphigenie

| 10-min winds = 65 | 1-min winds = 65

Tropical Cyclone Joelle

| 10-min winds = 65 | 1-min winds = 65

Tropical Cyclone Kalinka

| 10-min winds = 75 | 1-min winds = 85

Tropical Cyclone Yvonne–Lise

| 10-min winds = 70 | 1-min winds = 80

Intense Tropical Cyclone Maggie–Muriel

| 10-min winds = 90 | 1-min winds = 100

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

Tropical Cyclone Nelly

| 10-min winds = 65 | 1-min winds = 75

References

References

1. (1996). ["Tropical Storm Felice, 17 January- 5 February"]({{GTECCA url). National Climatic Data Center.
2. (1971_1}}). ["Hurricane Ginette, 17–31 January"]({{GTECCA url). National Climatic Data Center.
3. (1996). ["Hurricane Helga, 3–12 February"]({{GTECCA url). National Climatic Data Center.