Timeline of the 2019 Pacific hurricane season

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Timeline of the 2019 Pacific hurricane season
Season summary map
Season boundaries
First system formed	June 25, 2019
Last system dissipated	November 18, 2019
Strongest system
Name	Barbara
Maximum winds	155 mph (250 km/h) (1-minute sustained)
Lowest pressure	930 mbar (hPa; 27.46 inHg)
Longest lasting system
Name	Kiko
Duration	12 days
Storm articles Hurricane Lorena (2019) Tropical Storm Narda (2019)
Other years 2017, 2018, 2019, 2020, 2021

The 2019 Pacific hurricane season was an event in the annual cycle of tropical cyclone formation, in which tropical cyclones form in the eastern Pacific Ocean. The season officially started on May 15 in the eastern Pacific—east of 140°W—and June 1 in the central Pacific—between the International Date Line and 140°W, and ended on November 30. These dates conventionally delimit the period of each year when most tropical cyclones form in the eastern Pacific basin.

This timeline documents tropical cyclone formations, strengthening, weakening, landfalls, extratropical transitions, and dissipations during the season. It includes information that was not released throughout the season, meaning that data from post-storm reviews by the National Hurricane Center, such as a storm that was not initially warned upon, has been included.

By convention, meteorologists use one time zone when issuing forecasts and making observations: Coordinated Universal Time (UTC), and also use the 24-hour clock (where 00:00 = midnight UTC).^[1] Tropical cyclone advisories in the Eastern North Pacific basin use both UTC and the nautical time zone where the center of the tropical cyclone is currently located. Time zones utilized (east to west) are: Central, Mountain, Pacific and Hawaii. In this timeline, all information is listed by UTC first, with the respective regional time zone included in parentheses. Additionally, figures for maximum sustained winds and position estimates are rounded to the nearest 5 units (knots, miles, or kilometers), following National Hurricane Center practice. Direct wind observations are rounded to the nearest whole number. Atmospheric pressures are listed to the nearest millibar and nearest hundredth of an inch of mercury.