Hurricane Dora was the first hurricane of the Pacific hurricane season, and stayed out at sea throughout its entire duration. Originating from a broad low pressure area, the system became a tropical depression early on June 25, and was expected to peak initially as a high end tropical storm. However, when the system became Tropical Storm Dora, it began an unexpected period of rapid intensification, which brought it to hurricane intensity by 0900 UTC the following day. Dora then went on to attain a peak intensity as a minimal category 2 hurricane by 1500 UTC the same day. Later the same day, Dora weakened to a category 1 hurricane as it began taking on annular characteristics, which was short lived due to the effects of increasing shear, decreasing sea surface temperatures, and decreasing atmospheric moisture. By early on June 28, Dora had degraded to a tropical storm, and weakened to a remnant low by 0900 UTC the following day as the system was unable to generate any new convection.
| SSHWS category | 1-min winds | Pressure | Location | Date and time | ACE generated |
|---|---|---|---|---|---|
| Tropical Depression | 35 mph | 1006 mbar | 14.3N, 100.0W | 25/06/2017 0300 UTC | N/A |
| Tropical Storm | 40 mph | 1005 mbar | 14.7N, 100.9W | 25/06/2017 0900 UTC | 0.1225 |
| Tropical Storm | 50 mph | 1001 mbar | 15.0N, 101.8W | 25/06/2017 1500 UTC | 0.2025 |
| Tropical Storm | 60 mph | 997 mbar | 15.7N, 103.0W | 25/06/2017 2100 UTC | 0.2500 |
| Tropical Storm | 70 mph | 991 mbar | 16.4N, 104.3W | 26/06/2017 0300 UTC | 0.3600 |
| Category 1 hurricane | 85 mph | 987 mbar | 16.7N, 105.3W | 26/06/2017 0900 UTC | 0.4900 |
| Category 2 hurricane | 100 mph | 979 mbar | 17.3N, 106.3W | 26/06/2017 1500 UTC | 0.7225 |
| Category 1 hurricane | 90 mph | 981 mbar | 17.8N, 107.3W | 26/06/2017 2100 UTC | 0.6400 |
| Category 1 hurricane | 90 mph | 981 mbar | 18.4N, 108.3W | 26/06/2017 0300 UTC | 0.6400 |
| Category 1 hurricane | 75 mph | 987 mbar | 18.8N, 109.2W | 27/06/2017 0900 UTC | 0.4225 |
| Tropical Storm | 70 mph | 991 mbar | 19.3N, 110.2W | 27/06/2017 1500 UTC | 0.3600 |
| Tropical Storm | 50 mph | 998 mbar | 19.6N, 111.4W | 27/06/2017 2100 UTC | 0.2025 |
| Tropical Storm | 40 mph | 1003 mbar | 19.7N, 112.3W | 28/06/2017 0300 UTC | 0.1225 |
| Tropical Depression | 35 mph | 1006 mbar | 19.8N, 113.1W | 28/06/2017 0900 UTC | N/A |
| Total ACE | 4.4125 units |