Storm Activity: Jul 29, 1970 - Aug 4, 1970
Aug 4 · 12:00 GMT 30 mph -- Tropical Depression
| Aug 4 | 12:00 GMT | 18.9 | -121.4 | 30 mph | -- | Tropical Depression | -- |
| Aug 4 | 09:00 GMT | 19.06 | -121.2 | 30 mph | -- | Tropical Depression | -- |
| Aug 4 | 06:00 GMT | 19.2 | -121 | 30 mph | -- | Tropical Depression | -- |
| Aug 4 | 03:00 GMT | 19.32 | -120.81 | 30 mph | -- | Tropical Depression | -- |
| Aug 4 | 00:00 GMT | 19.4 | -120.6 | 30 mph | -- | Tropical Depression | -- |
| Aug 3 | 21:00 GMT | 19.46 | -120.36 | 30 mph | -- | Tropical Depression | -- |
| Aug 3 | 18:00 GMT | 19.5 | -120.1 | 30 mph | -- | Tropical Depression | -- |
| Aug 3 | 15:00 GMT | 19.55 | -119.85 | 30 mph | -- | Tropical Depression | -- |
| Aug 3 | 12:00 GMT | 19.6 | -119.6 | 30 mph | -- | Tropical Depression | -- |
| Aug 3 | 09:00 GMT | 19.66 | -119.35 | 30 mph | -- | Tropical Depression | -- |
| Aug 3 | 06:00 GMT | 19.7 | -119.1 | 30 mph | -- | Tropical Depression | -- |
| Aug 3 | 03:00 GMT | 19.7 | -118.86 | 30 mph | -- | Tropical Depression | -- |
| Aug 3 | 00:00 GMT | 19.7 | -118.6 | 30 mph | -- | Tropical Depression | -- |
| Aug 2 | 21:00 GMT | 19.75 | -118.31 | 30 mph | -- | Tropical Depression | -- |
| Aug 2 | 18:00 GMT | 19.8 | -118 | 30 mph | -- | Tropical Depression | -- |
| Aug 2 | 15:00 GMT | 19.81 | -117.7 | 30 mph | -- | Tropical Depression | -- |
| Aug 2 | 12:00 GMT | 19.8 | -117.4 | 30 mph | -- | Tropical Depression | -- |
| Aug 2 | 09:00 GMT | 19.79 | -117.09 | 30 mph | -- | Tropical Depression | -- |
| Aug 2 | 06:00 GMT | 19.8 | -116.8 | 35 mph | -- | Tropical Depression | -- |
| Aug 2 | 03:00 GMT | 19.85 | -116.57 | 35 mph | -- | Tropical Depression | -- |
| Aug 2 | 00:00 GMT | 19.9 | -116.3 | 35 mph | -- | Tropical Depression | -- |
| Aug 1 | 21:00 GMT | 19.91 | -115.93 | 35 mph | -- | Tropical Depression | -- |
| Aug 1 | 18:00 GMT | 19.9 | -115.5 | 35 mph | -- | Tropical Depression | -- |
| Aug 1 | 15:00 GMT | 19.91 | -115.05 | 40 mph | -- | Tropical Storm | -- |
| Aug 1 | 12:00 GMT | 19.9 | -114.6 | 45 mph | -- | Tropical Storm | -- |
| Aug 1 | 09:00 GMT | 19.86 | -114.19 | 50 mph | -- | Tropical Storm | -- |
| Aug 1 | 06:00 GMT | 19.8 | -113.8 | 50 mph | -- | Tropical Storm | -- |
| Aug 1 | 03:00 GMT | 19.75 | -113.4 | 55 mph | -- | Tropical Storm | -- |
| Aug 1 | 00:00 GMT | 19.7 | -113 | 60 mph | -- | Tropical Storm | -- |
| Jul 31 | 21:00 GMT | 19.66 | -112.59 | 60 mph | -- | Tropical Storm | -- |
| Jul 31 | 18:00 GMT | 19.6 | -112.2 | 60 mph | -- | Tropical Storm | -- |
| Jul 31 | 15:00 GMT | 19.51 | -111.85 | 55 mph | -- | Tropical Storm | -- |
| Jul 31 | 12:00 GMT | 19.4 | -111.5 | 50 mph | -- | Tropical Storm | -- |
| Jul 31 | 09:00 GMT | 19.3 | -111.11 | 50 mph | -- | Tropical Storm | -- |
| Jul 31 | 06:00 GMT | 19.2 | -110.7 | 50 mph | -- | Tropical Storm | -- |
| Jul 31 | 03:00 GMT | 19.1 | -110.29 | 50 mph | -- | Tropical Storm | -- |
| Jul 31 | 00:00 GMT | 19 | -109.9 | 50 mph | -- | Tropical Storm | -- |
| Jul 30 | 21:00 GMT | 18.91 | -109.54 | 50 mph | -- | Tropical Storm | -- |
| Jul 30 | 18:00 GMT | 18.8 | -109.2 | 45 mph | -- | Tropical Storm | -- |
| Jul 30 | 15:00 GMT | 18.66 | -108.87 | 45 mph | -- | Tropical Storm | -- |
| Jul 30 | 12:00 GMT | 18.5 | -108.5 | 40 mph | -- | Tropical Storm | -- |
| Jul 30 | 09:00 GMT | 18.32 | -108.07 | 40 mph | -- | Tropical Storm | -- |
| Jul 30 | 06:00 GMT | 18.1 | -107.6 | 40 mph | -- | Tropical Storm | -- |
| Jul 30 | 03:00 GMT | 17.84 | -107.14 | 40 mph | -- | Tropical Storm | -- |
| Jul 30 | 00:00 GMT | 17.6 | -106.7 | 40 mph | -- | Tropical Storm | -- |
| Jul 29 | 21:00 GMT | 17.43 | -106.34 | 40 mph | -- | Tropical Storm | -- |
| Jul 29 | 18:00 GMT | 17.3 | -106 | 40 mph | -- | Tropical Storm | -- |
| Jul 29 | 15:00 GMT | 17.2 | -105.66 | 35 mph | -- | Tropical Depression | -- |
| Jul 29 | 12:00 GMT | 17.1 | -105.3 | 30 mph | -- | Tropical Depression | -- |
Learn more about Tropical Storm Joyce and the 1970 Eastern Pacific hurricane season in our hurricane archive.
View All Hurricanes and Tropical Cyclones