Hurricane History Map

1970 South-West Indian season

17 storms formed in the South-West Indian basin in 1970, from 18 August 1969 to 9 May 1970.

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Years1970
Ocean basin

Choosing a minimum category hides storms with no wind speed in the record. To see which storms have passed near you, search a town or ZIP code, or tap the map.

Key
  • Tropical depression Winds below 34 knots (39 mph)
  • Tropical storm 34 to 63 knots (39 to 73 mph)
  • Category 1 64 to 82 knots (74 to 95 mph)
  • Category 2 83 to 95 knots (96 to 110 mph)
  • Category 3 96 to 112 knots (111 to 129 mph), major
  • Category 4 113 to 136 knots (130 to 156 mph), major
  • Category 5 137 knots (157 mph) or more, major
  • Unknown intensity No wind speed in the record
  • Post-tropical Storm has become post-tropical (dashed line)

How to read the lines. Each line is the track of one storm, drawn through its six-hourly positions and coloured by its intensity at each point (the Saffir-Simpson scale), so a line changes colour as the storm strengthens or weakens. Tap a line for its details, or tap anywhere else to see which storms have passed nearby. Weaker storms appear as you zoom in. Hurricanes, typhoons and cyclones are the same kind of storm with different names in different oceans.

The 1970 season in numbers

The record holds 17 storms for the 1970 South-West Indian season, of which 17 had names.0 reached tropical storm strength (34 knots or more), 0 reached cyclone strength (category 1 or more) and 0 were major (category 3 or more). 17 have no wind speed in the record.

  • 17storms
  • 0tropical storm strength or more
  • 0cyclone strength or more
  • 0major (category 3 to 5)
  • 0accumulated cyclone energy

Accumulated cyclone energy adds up the squared wind speed of every position of 34 knots or more, divided by 10,000. It is approximate here because the winds are 1-minute equivalents, and it is mostly useful for comparing seasons of one basin.

All 17 storms of 1970

StormPeak
Aline Unknown intensity
Blanche Unknown intensity
Corinne:corrine Unknown intensity
Delphine Unknown intensity
Diane:francoise Unknown intensity
Eliane Unknown intensity
Genevieve Unknown intensity
Hermine Unknown intensity
Glynis Unknown intensity
Iseult Unknown intensity
Judy Unknown intensity
Jane Unknown intensity
Ingrid Unknown intensity
Katia Unknown intensity
Kathy:michele Unknown intensity
Louise Unknown intensity
Lulu Unknown intensity

← 1969 · 1971 → · All seasons

Other basins in 1970

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