All seasons · Eastern and Central Pacific
1970 Pacific hurricane season
The 1970 Pacific season has 19 storms in the best-track record; 19 reached tropical-storm strength and 5 became hurricanes, none of them major. Its accumulated cyclone energy of 79.3 is the 29th-lowest of the 77 seasons in the eastern and central Pacific record since 1949. Patricia was the strongest, peaking at 110 mph as a Category 2 hurricane. Like most Pacific seasons before 1989, it has no landfall records in the file. The first record is dated May 30, the last November 8.
Storm by storm
More storms formed in July than in any other month of 1970: 6 of 19. Lorraine lasted longest, 11.5 days as a tropical or subtropical system. Patricia contributed the most energy, 19% of the season's ACE.
| Storm | Dates | Peak | Strength | Lowest | Landfalls |
|---|---|---|---|---|---|
| Adele | May 30 – Jun 7 | 85 mph | Category 1 | – | – |
| Blanca | Jun 10–12 | 60 mph | Tropical storm | – | – |
| Connie | Jun 17–21 | 50 mph | Tropical storm | – | – |
| Eileen | Jun 26–30 | 45 mph | Tropical storm | – | – |
| Francesca | Jul 1–10 | 100 mph | Category 2 | 991 mb | – |
| Gretchen | Jul 14–21 | 50 mph | Tropical storm | 1009 mb | – |
| Helga | Jul 16–20 | 60 mph | Tropical storm | – | – |
| Ione-2 | Jul 22–26 | 50 mph | Tropical storm | – | – |
| Ione-1 | Jul 24–25 | 60 mph | Tropical storm | – | – |
| Joyce | Jul 29 – Aug 4 | 60 mph | Tropical storm | – | – |
| Kristen | Aug 5–8 | 50 mph | Tropical storm | – | – |
| Lorraine | Aug 16–27 | 100 mph | Category 2 | 963 mb | – |
| Maggie | Aug 20–27 | 60 mph | Tropical storm | – | – |
| Norma | Aug 31 – Sep 6 | 60 mph | Tropical storm | 992 mb | – |
| Dot | Sep 1–4 | 80 mph | Category 1 | – | – |
| Orlene | Sep 7–9 | 65 mph | Tropical storm | – | – |
| Patricia | Oct 4–11 | 110 mph | Category 2 | 972 mb | – |
| Rosalie | Oct 21–23 | 50 mph | Tropical storm | 1006 mb | – |
| Selma | Nov 1–8 | 70 mph | Tropical storm | 995 mb | – |
Against other Pacific seasons
Accumulated cyclone energy of every season; the red bar is 1970.