Hurricane History Map

1970 North Atlantic season

21 storms formed in the North Atlantic basin in 1970, from 17 May 1970 to 6 December 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 21 storms for the 1970 North Atlantic season, of which 7 had names.14 reached tropical storm strength (34 knots or more), 7 reached hurricane strength (category 1 or more) and 2 were major (category 3 or more).

  • 21storms
  • 14tropical storm strength or more
  • 7hurricane strength or more
  • 2major (category 3 to 5)
  • 67accumulated 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.

Strongest storms of 1970

  • Celia (1970)31 July 1970 to 5 August 1970, peak Category 3 (110 kt), 953 hPa
  • Ella (1970)8 September 1970 to 13 September 1970, peak Category 3 (100 kt), 967 hPa
  • Unnamed storm of October 1970 (North Atlantic)12 October 1970 to 17 October 1970, peak Category 2 (85 kt), 974 hPa
  • Unnamed storm of October 1970 (North Atlantic)20 October 1970 to 28 October 1970, peak Category 2 (85 kt), 995 hPa
  • Unnamed storm of September 1970 (North Atlantic)30 September 1970 to 22 October 1970, peak Category 1 (75 kt), 989 hPa

All 21 storms of 1970

StormPeak
Alma Category 1
Becky Tropical storm
Unnamed storm Tropical depression
Celia Category 3
Unnamed storm Tropical depression
Unnamed storm Category 1
Unnamed storm Tropical depression
Dorothy Tropical storm
Unnamed storm Tropical depression
Unnamed storm Tropical storm
Unnamed storm Tropical depression
Ella Category 3
Felice Tropical storm
Unnamed storm Tropical storm
Unnamed storm Tropical depression
Greta Tropical storm
Unnamed storm Category 1
Unnamed storm Category 2
Unnamed storm Category 2
Unnamed storm Tropical depression
Unnamed storm Tropical storm

← 1969 · 1971 → · All seasons

Other basins in 1970

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