High Quality Content by WIKIPEDIA articles! Below is the Timeline of the 1990 Pacific hurricane season, documenting all the storm formations, strengthening, weakening, landfalls, extratropical transitions, as well as dissipation. The 1990 Pacific hurricane season officially began on May 15, 1990, and lasted until November 30. The timeline includes information that was not operationally released, meaning that information from post-storm reviews by the National Hurricane Center, such as information on a storm that was not operationally warned on, have been included.