The 1970 hurricane season

Every storm track on one map · Atlantic & Pacific · 40 systems

Atlantic storms
14
7 hurricanes · 2 major
Atlantic ACE
67
1991–2020 avg ≈ 123
Strongest
138 mph
Celia
Landfalling
6
Atlantic storms
Pacific storms
19
5 hurricanes · 0 major
Pacific strongest
109 mph
Patricia

TD TS Cat 1 2 3 4 5 · hover a track to highlight it, click to open the storm’s own page with an animated replay.

01 · Summary

How the 1970 season went

The 1970 Atlantic season produced 14 tropical storms, 7 hurricanes and 2 major hurricanes (Cat 3+), with an accumulated cyclone energy (ACE) of 67. The strongest was Hurricane Celia at 138 mph / 944 mb. 6 storms made landfall.

The 1970 Eastern Pacific season (Eastern and Central Pacific) produced 19 tropical storms, 5 hurricanes and 0 major hurricanes (Cat 3+), with an accumulated cyclone energy (ACE) of 79. The strongest was Hurricane Patricia at 109 mph / 972 mb. 0 storms made landfall.

02 · Timeline

Storm by storm, month by month

MAYJUNJULAUGSEPOCTNOVDECHurricane Alma — May 17–27, 1970Alma Cat 1Hurricane Adele — May 30 – June 7, 1970Adele Cat 1Tropical Storm Blanca — June 10–12, 1970Blanca TSTropical Storm Connie — June 17–21, 1970Connie TSTropical Storm Eileen — June 26–30, 1970Eileen TSHurricane Francesca — July 1–10, 1970Francesca Cat 2Tropical Storm Gretchen — July 14–21, 1970Gretchen TSTropical Storm Helga — July 16–20, 1970Helga TSTropical Storm Becky — July 19–23, 1970Becky TSTropical Storm Ione-2 — July 22–26, 1970Ione-2 TSTropical Storm Ione-1 — July 24–25, 1970Ione-1 TSUnnamed storm #3 — July 28 – August 1, 1970Unnamed storm #3 TDTropical Storm Joyce — July 29 – August 4, 1970Joyce TSHurricane Celia — July 31 – August 5, 1970Celia Cat 4Unnamed storm #5 — August 2–6, 1970Unnamed storm #5 TDTropical Storm Kristen — August 5–8, 1970Kristen TSUnnamed hurricane #8 — August 7–24, 1970Unnamed hurricane #8 Cat 1Unnamed storm #7 — August 11–18, 1970Unnamed storm #7 TDHurricane Lorraine — August 16–27, 1970Lorraine Cat 2Tropical Storm Dorothy — August 18–22, 1970Dorothy TSTropical Storm Maggie — August 20–27, 1970Maggie TSTropical Storm Norma — August 31 – September 6, 1970Norma TSHurricane Dot — September 1–4, 1970Dot Cat 1Unnamed storm #20 — September 1–2, 1970Unnamed storm #20 TDUnnamed storm #10 — September 3–13, 1970Unnamed storm #10 TSUnnamed storm #11 — September 5–7, 1970Unnamed storm #11 TDTropical Storm Orlene — September 7–9, 1970Orlene TSHurricane Ella — September 8–13, 1970Ella Cat 3Tropical Storm Felice — September 12–19, 1970Felice TSUnnamed storm #21 — September 19–23, 1970Unnamed storm #21 TSUnnamed storm #14 — September 22–25, 1970Unnamed storm #14 TDTropical Storm Greta — September 26 – October 4, 1970Greta TSUnnamed hurricane #15 — September 30 – October 22, 1970Unnamed hurricane #15 Cat 1Hurricane Patricia — October 4–11, 1970Patricia Cat 21970 Canada Hurricane — October 12–17, 19701970 Canada Hurricane Cat 2Unnamed hurricane #19 — October 20–28, 1970Unnamed hurricane #19 Cat 2Tropical Storm Rosalie — October 21–23, 1970Rosalie TSTropical Storm Selma — November 1–8, 1970Selma TSUnnamed storm #22 — November 13–15, 1970Unnamed storm #22 TDUnnamed storm #23 — November 26 – December 6, 1970Unnamed storm #23 TS

Each bar is one storm’s life, colored by its strength at that moment (faded = post-tropical). Click a bar to open the storm.

03 · Atlantic

Atlantic storms of 1970

StormDatesPeakPressureLandfallACE
Hurricane AlmaMay 17 – May 27Cat 1 75 mph993 mb—3.4
Tropical Storm BeckyJul 19 – Jul 23TS 63 mph1003 mbFlorida2.4
Unnamed storm #3Jul 28 – Aug 1TD 35 mph1008 mb—0.0
Hurricane CeliaJul 31 – Aug 5Cat 4 138 mph944 mbTexas, Pinar del Río, Cuba8.3
Unnamed storm #5Aug 2 – Aug 6TD 35 mph——0.0
Unnamed hurricane #8Aug 7 – Aug 24Cat 1 81 mph1002 mbyes5.5
Unnamed storm #7Aug 11 – Aug 18TD 35 mph——0.0
Tropical Storm DorothyAug 18 – Aug 22TS 69 mph996 mbMartinique3.3
Unnamed storm #20Sep 1 – Sep 2TD 35 mph1008 mb—0.0
Unnamed storm #10Sep 3 – Sep 13TS 46 mph1006 mb—1.1
Unnamed storm #11Sep 5 – Sep 7TD 29 mph——0.0
Hurricane EllaSep 8 – Sep 13Cat 3 127 mph962 mbTamaulipas, Mexico, Quintana Roo, Mexico5.3
Tropical Storm FeliceSep 12 – Sep 19TS 69 mph990 mbTexas1.8
Unnamed storm #21Sep 19 – Sep 23TS 46 mph——0.8
Unnamed storm #14Sep 22 – Sep 25TD 29 mph——0.0
Tropical Storm GretaSep 26 – Oct 4TS 46 mph1003 mb—0.9
Unnamed hurricane #15Sep 30 – Oct 22Cat 1 86 mph989 mb—12.4
1970 Canada HurricaneOct 12 – Oct 17Cat 2 98 mph974 mb—6.9
Unnamed hurricane #19Oct 20 – Oct 28Cat 2 98 mph995 mb—10.6
Unnamed storm #22Nov 13 – Nov 15TD 35 mph1004 mb—0.0
Unnamed storm #23Nov 26 – Dec 6TS 69 mph987 mb—3.8

04 · Pacific

Eastern & Central Pacific storms of 1970

StormDatesPeakPressureLandfallACE
Hurricane AdeleMay 30 – Jun 7Cat 1 86 mph——10.2
Tropical Storm BlancaJun 10 – Jun 12TS 58 mph——1.9
Tropical Storm ConnieJun 17 – Jun 21TS 52 mph——2.5
Tropical Storm EileenJun 26 – Jun 30TS 46 mph——0.9
Hurricane FrancescaJul 1 – Jul 10Cat 2 98 mph991 mb—7.9
Tropical Storm GretchenJul 14 – Jul 21TS 52 mph1009 mb—4.0
Tropical Storm HelgaJul 16 – Jul 20TS 58 mph——1.3
Tropical Storm Ione-2Jul 22 – Jul 26TS 52 mph——1.5
Tropical Storm Ione-1Jul 24 – Jul 25TS 58 mph——0.5
Tropical Storm JoyceJul 29 – Aug 4TS 58 mph——2.1
Tropical Storm KristenAug 5 – Aug 8TS 52 mph——1.6
Hurricane LorraineAug 16 – Aug 27Cat 2 98 mph963 mb—11.8
Tropical Storm MaggieAug 20 – Aug 27TS 58 mph——4.7
Tropical Storm NormaAug 31 – Sep 6TS 58 mph992 mb—3.3
Hurricane DotSep 1 – Sep 4Cat 1 81 mph——3.1
Tropical Storm OrleneSep 7 – Sep 9TS 63 mph——1.5
Hurricane PatriciaOct 4 – Oct 11Cat 2 109 mph972 mb—15.3
Tropical Storm RosalieOct 21 – Oct 23TS 52 mph1006 mb—1.6
Tropical Storm SelmaNov 1 – Nov 8TS 69 mph995 mb—3.6
← Previous season1969Next season →1971

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