2024 Pacific hurricane season

The 2024 Pacific hurricane season is the ongoing Pacific hurricane season in the Northern Hemisphere. It officially began on May 15 in the eastern Pacific basin (east of 140°W) and on June 1 in the central Pacific (between 140°W and the International Date Line); both will end on November 30. These dates, adopted by convention, historically describe the period in each year when most subtropical or tropical cyclogenesis occurs in these regions of the Pacific Ocean. For the third consecutive year, there were no pre-season tropical cyclones in either basin, and the season got off to the slowest start of any Pacific hurricane season on record in the satellite era. The first eastern Pacific tropical storm, Aletta, did not form until July 4.

Seasonal forecasts
In advance of each Pacific hurricane season, forecasts of hurricane activity are issued by the United States National Oceanic and Atmospheric Administration (NOAA)'s Climate Prediction Center and Mexico's Servicio Meteorológico Nacional (SMN). These include weekly and monthly changes in significant factors that help determine the number of tropical storms, hurricanes, and major hurricanes within a particular year. According to NOAA, the average eastern Pacific hurricane season between 1991 and 2020 contained roughly 15 tropical storms, 8 hurricanes, 4 major hurricanes, with a near-normal accumulated cyclone energy (ACE) index between 80 and 115. Broadly speaking, ACE is a measure of the power of a tropical or subtropical storm multiplied by the length of time it existed. It is only calculated for full advisories on specific tropical and subtropical systems reaching or exceeding wind speeds of 39 mph. NOAA typically categorizes a season as above-average, average, or below-average based on the cumulative ACE index, but the number of tropical storms, hurricanes, and major hurricanes within a hurricane season is sometimes also considered.

On May 6, 2024, SMN issued its forecast for the season, forecasting a total of 15–18 named storms developing, with 7–9 hurricanes, and 3–4 major hurricanes. On May 23, 2024, NOAA issued their outlook, calling for a below-normal season with 11–17 named storms overall, 4–9 hurricanes, 1–4 major hurricanes, and an ACE index of 50% to 110% of the median.

Background
Officially, the 2024 Pacific hurricane season began on May 15 in the Eastern Pacific, on June 1 in the Central Pacific, and both will end on November 30. So far, only one tropical cyclone has formed, which became a named storm. The system was short-lived Tropical Storm Aletta.

This season's ACE index, as of MDY, is approximately 0.2 units. This number represents sum of the squares of the maximum sustained wind speed (knots) for all named storms while they are at least tropical storm intensity, divided by 10,000. Therefore, tropical depressions are not included.

Early activity
The season began unusually quiet, with several weeks of inactivity throughout the basin, the first system, short-lived Tropical Storm Aletta formed on July 4th, which made it the latest first named Pacific system to form in the satellite era. After dissipating just days after being named, the Pacific would then again fall under a period of inactivity.

Tropical Storm Aletta
On June 29, the National Hurricane Center (NHC) noted that a low-pressure area could form off the coast of Mexico. On July 2, a broad area of low pressure formed south of the coast of Mexico. Showers and thunderstorms within the disturbance became better organized beginning late the following day, and Tropical Depression One-E formed during the morning of July 4, about 175 mi southwest of Manzanillo, Colima. Slightly intensifying, the compact system became Tropical Storm Aletta a few hours later. However, by the next day, Aletta weakened into a tropical depression due to moderate wind shear. An increasingly marginal environment caused Aletta to degenerate into a remnant low a few hours later.

Storm names
The following list of names is being used for named storms that form in the North Pacific Ocean east of 140°W during 2024. This is the same list used in the 2018 season.

For storms that form in the North Pacific from 140°W to the International Date Line, the names come from a series of four rotating lists. Names are used one after the other without regard to year, and when the bottom of one list is reached, the next named storm receives the name at the top of the next list.

Season effects
This is a table of all of the storms that have formed in the 2024 Pacific hurricane season. It includes their name, duration, peak classification and intensities, areas affected, damage, and death totals. Deaths in parentheses are additional and indirect (an example of an indirect death would be a traffic accident), but were still related to that storm. Damage and deaths include totals while the storm was extratropical, a wave, or a low, and all of the damage figures are in 2024 USD.