The 1993 Pacific hurricane season consisted of the events that occurred in the annual cycle of tropical cyclone formation over the Pacific Ocean north of the Equator and east of the International Date Line. The official bounds of each Pacific hurricane season are dates that conventionally delimit the period each year during which tropical cyclones tend to form in the basin according to the National Hurricane Center, beginning on May 15 in the Eastern Pacific proper (east of 140°W) and on June 1 in the Central Pacific (140°W to the International Date Line), and ending on November 30 in both areas. However, tropical cyclogenesis is possible at any time of the year. The first system, Hurricane Adrian, developed on June 11; the final system, Tropical Depression , dissipated on October 14.
A total of eighteen tropical depressions formed during the season; fifteen of these developed into named tropical storms, of which eleven became hurricanes and nine became major hurricanes (Category 3 or higher on the Saffir–Simpson scale). The number of tropical storms was near the long-term average; the number of hurricanes was slightly above average, and the number of major hurricanes was more than double the average of four. As with many active Pacific hurricane seasons, El Niño conditions greatly influenced this season's high activity levels. Several long-lived and powerful hurricanes contributed to an overall Accumulated Cyclone Energy value of 201.8 units, the eighth-highest on record for a Pacific hurricane season as of February 2024.
The most impactful storm of the season was Hurricane Calvin, which made landfall near Manzanillo in the Mexican state of Colima as a Category 2 hurricane; it killed more than 30 people, mainly due to significant flooding, and damages amounted to $32 million (1993 USD). Two months later, Hurricane Lidia came ashore at a similar intensity farther to the northwest along the coast of Sinaloa, where it caused considerable damage and multiple fatalities. In conjunction with a cold front, Lidia's remnants generated severe weather in Texas, including a tornado that caused $8 million (1993 USD) in damage. Earlier in the season, Tropical Storm Beatriz killed 6 people in Mexico when it struck the southern portion of the country, while Tropical Depression produced heavy rainfall that amounted to nearly a foot (12 in; 30.48 cm) in Acapulco despite remaining offshore. Hurricane Hilary made three landfalls in Mexico – twice on the Baja California peninsula as a tropical storm, and then on the Mexican mainland as a tropical depression – but caused no loss of life and little damage. Hurricanes Dora, Eugene, and Fernanda produced minor impacts in Hawaii; Eugene made landfall on the Big Island as a tropical depression, while Fernanda prompted the issuance of a hurricane warning, though this was discontinued when the storm turned away.
Prior to 2015, two time zones were utilized in the Eastern Pacific basin: Pacific east of 140°W, and Hawaii−Aleutian from 140°W to the International Date Line. For convenience, each event is listed in Coordinated Universal Time (UTC) first, using the 24-hour clock (where 00:00 = midnight UTC), with the respective local time included in parentheses. Figures for maximum sustained winds and position estimates are rounded to the nearest five units (knots, miles, or kilometers) and averaged over one minute, 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. This timeline documents the formation of tropical cyclones as well as the strengthening, weakening, landfalls, extratropical transitions, and dissipations during the season. It includes information that was not released while the storm was active, meaning that data from post-storm reviews by the National Hurricane Center and the Central Pacific Hurricane Center is included.
Timeline of events
May May 15 The 1993 Eastern Pacific hurricane season officially begins. No tropical cyclones formed in May.
June June 1 The 1993 Central Pacific hurricane season officially begins.
June 11 06:00 UTC (11:00 p.m. PDT, June 10) at The first tropical depression of the season forms an area of disturbed weather about 960 mi (1,545 km) south-southwest of the southern tip of the Baja California peninsula.
June 12 06:00 UTC (11:00 p.m. PDT, June 11) at The tropical depression strengthens into Tropical Storm Adrian about 960 mi (1,545 km) south-southwest of the southern tip of the Baja California peninsula.
June 15 12:00 UTC (5:00 a.m. PDT) at Tropical Storm Adrian strengthens into a Category 1 hurricane about 965 mi (1,555 km) southwest of the southern tip of the Baja California peninsula.
June 16 00:00 UTC (5:00 p.m. PDT, June 15) at Hurricane Adrian reaches peak winds of 85 mph (140 km/h) and a minimum barometric pressure of about 930 mi (1,500 km) southwest of the southern tip of the Baja California peninsula.
June 17 00:00 UTC (5:00 p.m. PDT, June 16) at Hurricane Adrian weakens into a tropical storm about 845 mi (1,360 km) southwest of the southern tip of the Baja California peninsula. 18:00 UTC (11:00 a.m. PDT) at Tropical Storm Adrian weakens into a tropical depression about 835 mi (1,345 km) southwest of the southern tip of the Baja California peninsula.
June 18 06:00 UTC (11:00 p.m. PDT, June 17) at A tropical depression forms from an area of low pressure about 175 mi (280 km) south-southeast of Huatulco, Mexico. 12:00 UTC (5:00 a.m. PDT) at The tropical depression strengthens into Tropical Storm Beatriz about 150 mi (240 km) south-southeast of Huatulco, Mexico.
June 19 12:00 UTC (5:00 a.m. PDT) at Tropical Depression Adrian is last noted about 845 mi (1,360 km) southwest of the southern tip of the Baja California peninsula; it dissipates six hours later. 18:00 UTC (11:00 a.m. PDT) at Tropical Storm Beatriz reaches peak winds of 65 mph (100 km/h) and a minimum barometric pressure of . It simultaneously makes landfall near Laguna de la Pastoría in the Mexican state of Oaxaca.
June 20 00:00 UTC (5:00 p.m. PDT, June 19) at Tropical Storm Beatriz weakens into a tropical depression inland over southwestern Mexico; it dissipates six hours later.
June 27
00:00 UTC (5:00 p.m. PDT, June 26) at Tropical Depression forms from a large area of disturbed weather about 115 mi (185 km) south of the Gulf of Tehuantepec. 12:00 UTC (5:00 a.m. PDT) at Tropical Depression reaches peak winds of 35 mph (55 km/h) about 110 mi (175 km) southeast of Puerto Escondido, Oaxaca.
June 30 18:00 UTC (11:00 a.m. PDT) at Tropical Depression reaches a minimum barometric pressure of about 295 mi (475 km) south-southeast of La Paz, Baja California Sur.
July July 2 00:00 UTC (5:00 p.m. PDT, July 1) at Tropical Depression is last noted just north of La Paz, Baja California Sur; it dissipates shortly thereafter.
July 4
12:00 UTC (5:00 a.m. PDT) at A tropical depression forms from an area of disturbed weather about 315 mi (510 km) southeast of Acapulco, Guerrero.
July 5 00:00 UTC (5:00 p.m. PDT, July 4) at The tropical depression strengthens into Tropical Storm Calvin about 295 mi (475 km) south-southeast of Acapulco, Guerrero.
July 6 00:00 UTC (5:00 p.m. PDT, July 5) at Tropical Storm Calvin strengthens into a Category 1 hurricane about 225 mi (360 km) south of Acapulco, Guerrero. 12:00 UTC (5:00 a.m. PDT) at Hurricane Calvin strengthens to Category 2 intensity about 110 mi (175 km) south-southwest of Acapulco, Guerrero.
July 7 12:00 UTC (5:00 a.m. PDT) at Hurricane Calvin reaches peak winds of 110 mph (175 km/h) and a minimum barometric pressure of about 85 mi (140 km) south-southeast of Manzanillo, Colima. 18:00 UTC (11:00 a.m. PDT) at Hurricane Calvin makes its first landfall about 45 mi (75 km) west-northwest of Manzanillo, Colima with winds of 100 mph (155 km/h) and a minimum barometric pressure of .
July 8
00:00 UTC (5:00 p.m. PDT, July 7) at Hurricane Calvin rapidly weakens into a tropical storm as it re-emerges over the Pacific Ocean about 130 mi (215 km) northwest of Manzanillo, Colima. 17:00 UTC (10:00 a.m. PDT) at Tropical Storm Calvin weakens into a tropical depression as it makes its second landfall just south of La Paz, Baja California Sur with winds of 35 mph (55 km/h) and a barometric pressure of .
July 9 00:00 UTC (5:00 p.m. PDT, July 8) at Tropical Depression Calvin is last noted about 65 mi (100 km) southwest of La Paz, Baja California Sur; it dissipates six hours later.
July 14 12:00 UTC (5:00 a.m. PDT) at A tropical depression forms from a tropical wave over the open Eastern Pacific Ocean. 18:00 UTC (11:00 a.m. PDT) at The tropical depression strengthens into Tropical Storm Dora.
July 15 18:00 UTC (11:00 a.m. PDT) at Tropical Storm Dora strengthens into a Category 1 hurricane. 18:00 UTC (11:00 a.m. PDT) at Another tropical depression forms from a tropical wave about 805 mi (1,295 km) south-southwest of the southern tip of the Baja California peninsula.
July 16 00:00 UTC (5:00 p.m. PDT, July 15) at Hurricane Dora strengthens to Category 2 intensity. 06:00 UTC (11:00 p.m. PDT, July 15) at Hurricane Dora strengthens to Category 3 intensity, making it the first major hurricane of the season. 12:00 UTC (5:00 a.m. PDT) at The aforementioned tropical depression strengthens into Tropical Storm Eugene about 865 mi (1,390 km) south-southwest of the southern tip of the Baja California peninsula. 18:00 UTC (11:00 a.m. PDT) at Hurricane Dora strengthens to Category 4 intensity; it simultaneously reaches peak winds of 130 mph (215 km/h).
July 17 06:00 UTC (11:00 p.m. PDT, July 16) at Hurricane Dora reaches a minimum barometric pressure of . 06:00 UTC (11:00 p.m. PDT, July 16) at Tropical Storm Eugene strengthens into a Category 1 hurricane about 930 mi (1,500 km) south-southwest of the southern tip of the Baja California peninsula.
18:00 UTC (11:00 a.m. PDT) at Hurricane Dora weakens to Category 3 intensity. 18:00 UTC (11:00 a.m. PDT) at Hurricane Eugene strengthens to Category 2 intensity about 975 mi (1,565 km) southwest of the southern tip of the Baja California peninsula.
July 18 00:00 UTC (5:00 p.m. PDT, July 17) at Hurricane Dora weakens to Category 2 intensity. 00:00 UTC (5:00 p.m. PDT, July 17) at Hurricane Eugene strengthens to Category 3 intensity about 985 mi (1,585 km) southwest of the southern tip of the Baja California peninsula, making it the second major hurricane of the season. 06:00 UTC (11:00 p.m. PDT, July 17) at Hurricane Dora weakens to Category 1 intensity. 18:00 UTC (11:00 a.m. PDT) at Hurricane Dora weakens into a tropical storm.
July 19
12:00 UTC (5:00 a.m. PDT) at Tropical Storm Dora weakens into a tropical depression. 12:00 UTC (5:00 a.m. PDT) at Hurricane Eugene reaches peak winds of 125 mph (205 km/h) about 980 mi (1,575 km) southwest of the southern tip of the Baja California peninsula. 18:00 UTC (11:00 a.m. PDT) at Hurricane Eugene reaches a minimum barometric pressure of about 1,030 mi (1,660 km) west-southwest of the southern tip of the Baja California peninsula.
July 20 00:00 UTC (2:00 p.m. HST, July 19) at Tropical Depression Dora crosses into the Central Pacific basin. 18:00 UTC (11:00 a.m. PDT) at Hurricane Eugene weakens to Category 2 intensity about 1,290 mi (2,075 km) west-southwest of the southern tip of the Baja California peninsula.
July 21 00:00 UTC (2:00 p.m. HST, July 20) at Tropical Depression Dora dissipates about 575 mi (925 km) east of the Hawaiian Islands.
July 22 00:00 UTC (5:00 p.m. PDT, July 21) at Hurricane Eugene weakens to Category 1 intensity about 1,655 mi (2,670 km) west-southwest of the southern tip of the Baja California peninsula. 06:00 UTC (11:00 p.m. PDT, July 21) at Hurricane Eugene weakens into a tropical storm about 1,755 mi (2,825 km) west-southwest of the southern tip of the Baja California peninsula.
July 23