Timeline of the 2016 Pacific hurricane season

The 2016 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 on June 1 in the central Pacific–between the International Date Line and 140°W–and ended on November 30. These dates typically cover the period of each year when most tropical cyclones form in the eastern Pacific basin. However the first storm, Pali, formed 5 months before the official start of the season on January 7, which broke the record for having the earliest forming storm within the basin.

During the season, 22 tropical depressions developed within the basin, 21 of which became tropical storms. 13 of the tropical storms reached hurricane strength, with six achieving major hurricane intensity. Additionally, Tropical Storm Otto entered the basin after crossing over from the Atlantic, thus further contributing to the season total.

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.

The time stamp for each event is first stated using Coordinated Universal Time (UTC), the 24-hour clock where 00:00 = midnight UTC. The NHC uses both UTC and the time zone where the center of the tropical cyclone is currently located. The time zones utilized (east to west) are: Central, Mountain, Pacific and Hawaii. In this timeline, the respective area time is included in parentheses. Additionally, figures for maximum sustained winds and position estimates are rounded to the nearest 5 units (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. __TOC__

Timeline

January January 7 06:00 UTC (8:00 p.m. HST, January 6) at – Tropical Depression One-C develops 935 miles (1,505 km) south of Johnston Island. 12:00 UTC (11:00 a.m. HST) at – Tropical Depression One-C strengthens into Tropical Storm Pali while located about 900 miles (1,450 km) south of Johnston Island, thus becoming the earliest named storm in the Central Pacific.

January 12

00:00 UTC (2:00 p.m. HST, January 11) at – Tropical Storm Pali strengthens into a Category 1 hurricane, becoming the earliest recorded hurricane within the basin, about 615 miles (985 km) south-southwest of Johnston Island. 18:00 UTC (8:00 a.m. HST) at – Hurricane Pali strengthens into a Category 2 hurricane about 725 miles (1,165 km) south of Johnston Island. It simultaneously achieves its peak strength with winds of and a pressure of 978 mbar (hPa; ).

January 13 00:00 UTC (2:00 p.m. HST, January 12) at – Hurricane Pali weakens to a Category 1 hurricane roughly 770 miles (1,235 km) south of Johnston Island. 18:00 UTC (8:00 a.m. HST) at – Hurricane Pali weakens to a tropical storm about 910 miles (1465 km) south of Johnston Island.

January 14 12:00 UTC (2:00 a.m. HST) at – Tropical Storm Pali rapidly weakens to a tropical depression approximately 995 miles (1,600 km) south-southwest of Johnston Island. 18:00 UTC (8:00 a.m. HST) at – Tropical Depression Pali degenerates into a remnant low about 1,015 miles (1,635 km) south-southwest of Johnston Island.

January 15 00:00 UTC (2:00 p.m. HST, January 14) – The remnants of Pali dissipate.

May May 15 The 2016 Pacific hurricane season officially begins.

June June 6 12:00 UTC (7:00 a.m. CDT) at – Tropical Depression One-E develops from an area of low pressure about 180 miles (290 km) south-southwest of Puerto Escondido, Mexico. 18:00 UTC (1:00 p.m. CDT) at – Tropical Depression One-E attains its peak intensity with maximum sustained winds of and a minimum barometric pressure of 1006 mbar (hPa; ) roughly south of Puerto Escondido, Mexico.

June 8 00:00 UTC (7:00 p.m. CDT June 7) at – Tropical Depression One-E degenerates into a remnant low approximately southeast of Salina Cruz, Mexico. 12:00 UTC (7:00 a.m. CDT) The remnants of One-E dissipate.

July

July 2 00:00 UTC (5:00 p.m. PDT, July 1) at – Tropical Depression Two-E develops from an area of low pressure about 690 mi (1,110 km) southwest of the southern tip of the Baja California peninsula. 18:00 UTC (2:00 p.m. PDT) at – Tropical Depression Two-E intensifies into Tropical Storm Agatha roughly 800 mi (1,285 km) southwest of the Baja California peninsula. 18:00 UTC (12:00 p.m. MDT) at Tropical Depression Three-E develops approximately southwest of Manzanillo, Mexico.

July 3 06:00 UTC (9:00 p.m. MDT July 2) at – Tropical Depression Three-E strengthens into Tropical Storm Blas about southwest of Manzanillo. 06:00 UTC (11:00 p.m. PDT, July 2) at – Tropical Storm Agatha attains its peak intensity with maximum sustained winds of and a minimum barometric pressure of 1002 mbar (hPa; ) about 895 mi (1,440 km) southwest of the Baja California peninsula.

July 4 12:00 UTC (6:00 a.m. MDT) at – Tropical Storm Blas strengthens into a Category 1 hurricane about south-southwest of the southern tip of Baja California. 18:00 UTC (11:00 a.m. PDT) at – Tropical Storm Agatha weakens to a tropical depression about 1,250 mi (2,010 km) west-southwest of the Baja California peninsula.

July 5 06:00 UTC (11:00 p.m. PDT, July 4) at – Tropical Depression Agatha degenerates into a remnant area of low pressure roughly 1,375 mi (2,215 km) west-southwest of the Baja California peninsula. 06:00 UTC (11:00 p.m. PDT, July 4) at – Hurricane Blas strengthens into a Category 2 hurricane roughly 805 mi (1,295 km) southwest of the southern tip of Baja California. 18:00 UTC (11:00 a.m. PDT) at – Hurricane Blas rapidly intensifies into a Category 3 hurricane roughly southwest of the southern tip of Baja California.

July 6

00:00 UTC (8:00 p.m. PDT July 5) at – Hurricane Blas strengthens into a Category 4 hurricane, simultaneously reaching its peak intensity with maximum sustained winds of and a barometric pressure of 947 mbar (hPa; ) while situated approximately southwest of the southern tip of Baja California. 12:00 UTC (2:00 a.m. PDT) at – Hurricane Blas weakens to a Category 3 hurricane roughly southwest of the southern tip of Baja California. 18:00 UTC (12:00 p.m. MDT) – Tropical Depression Four-E develops from an area of low pressure about south-southwest of Manzanillo, Mexico.

July 8 00:00 UTC (5:00 p.m. PDT July 7) at – Hurricane Blas weakens to a Category 2 hurricane roughly west-southwest of the southern tip of Baja California. 12:00 UTC (2:00 a.m. HST)  the remnants of Agatha dissipate over the Central Pacific. 12:00 UTC (6:00 a.m. PDT) – Tropical Depression Four-E intensifies into Tropical Storm Celia roughly 725 mi (1,165 km) south-southwest of the Baja California peninsula. 18:00 UTC (11:00 a.m. PDT) at – Hurricane Blas weakens to a Category 1 hurricane roughly west of the southern tip of Baja California.

July 9 06:00 UTC (2:00 a.m. PDT) at – Hurricane Blas rapidly weakens to a tropical storm roughly west of the southern tip of Baja California.

July 10 06:00 UTC (11:00 p.m. PDT, July 9) at – Tropical Storm Blas degenerates into a remnant low about east of Hilo, Hawaii. 18:00 UTC (11:00 a.m. PDT) – Tropical Storm Celia intensifies into a Category 1 hurricane approximately 955 mi (1,535 km) southwest of the Baja California peninsula.

July 11 12:00 UTC (6:00 a.m. MDT) – Tropical Depression Five-E develops from an area of low pressure about south-southwest of Manzanillo, Mexico. 18:00 UTC (11:00 a.m. PDT) – Hurricane Celia intensifies into a Category 2 hurricane and simultaneously attains its peak intensity with maximum sustained winds of and a minimum barometric pressure of 972 mbar (hPa; ) about 1,170 mi (1,885 km) southwest of the Baja California peninsula.

July 12 00:00 UTC (5:00 p.m. PDT, July 11)  The remnants of Blas dissipate. 12:00 UTC (5:00 a.m. PDT) – Hurricane Celia weakens to a Category 1 hurricane roughly 1,265 mi (2,035 km) west-southwest of the Baja California peninsula. 12:00 UTC (6:00 a.m. MDT) – Tropical Depression Five-E intensifies into Tropical Storm Darby about southwest of Manzanillo, Mexico.

July 13 06:00 UTC (11:00 p.m. PDT, July 12) – Hurricane Celia weakens to a tropical storm approximately 1,570 mi (2,525 km) east-southeast of the Hawaiian Islands. 18:00 UTC (12:00 p.m. MDT) – Tropical Storm Darby intensifies into a Category 1 hurricane about south-southwest of the Baja California peninsula.

July 15 06:00 UTC (11:00 p.m. PDT, July 14) – Hurricane Darby intensifies into a Category 2 hurricane roughly 780 mi (1,255 km) southwest of the Baja California peninsula. 12:00 UTC (6:00 am. MDT) – Tropical Depression Six-E develops from an area of low pressure about south-southwest of Manzanillo, Mexico.

July 16 00:00 UTC (5:00 p.m. PDT, July 15) – Tropical Storm Celia degenerates into a remnant area of low pressure about 775 mi (1,245 km) east of the Hawaiian Islands. 00:00 UTC (6:00 p.m. MDT, July 15) – Tropical Depression Six-E intensifies into Tropical Storm Estelle about southwest of Manzanillo, Mexico. 12:00 UTC (5:00 a.m. PDT) – Hurricane Darby intensifies into a Category 3 hurricane roughly 945 mi (1,520 km) west-southwest of the Baja California peninsula. 18:00 UTC (11:00 a.m. PDT) – Hurricane Darby attains its peak intensity with maximum sustained winds of and a minimum barometric pressure of 958 mbar (hPa; ) approximately 995 mi (1,600 km) west-southwest of the Baja California peninsula.

July 17 06:00 UTC (11:00 p.m. PDT, July 16) – Hurricane Darby weakens to a Category 2 hurricane about 1,100 mi (1,770 km) west-southwest of the Baja California peninsula. 18:00 UTC (12:00 p.m. MDT) – Tropical Storm Estelle attains its peak intensity with maximum sustained winds of and a minimum barometric pressure of 990 mbar (hPa; ) about south-southwest of the Baja California peninsula.

July 18 00:00 UTC (5:00 p.m. PDT, July 17) – Hurricane Darby weakens to a Category 1 hurricane roughly 1,255 mi (2,020 km) west-southwest of the Baja California peninsula.

July 19 06:00 UTC (11:00 p.m. PDT, July 18) – Hurricane Darby weakens to a tropical storm approximately 1,380 mi (2,220 km) east-southeast of the Hawaiian Islands.

July 21 06:00 UTC (1:00 a.m. CDT) – Tropical Depression Seven-E develops from an area of low pressure about south-southeast of Manzanillo, Mexico. 06:00 UTC (12:00 a.m. MDT) – Tropical Depression Eight-E develops from an area of low pressure approximately 805 mi (1,295 km) southwest of Manzanillo, Mexico. 12:00 UTC (7:00 a.m. CDT) – Tropical Depression Seven-E intensifies into Tropical Storm Frank roughly south-southeast of Manzanillo, Mexico.

July 22

00:00 UTC (5:00 p.m. PDT, July 21) – Tropical Storm Estelle degenerates into a remnant area of low pressure about 1,605 mi (2,585 km) east-southeast of the Hawaiian Islands. 12:00 UTC (5:00 a.m. PDT) – Tropical Depression Eight-E intensifies into Tropical Storm Georgette roughly 855 mi (1,375 km) south-southwest of the Baja California peninsula.

July 24 00:00 UTC (5:00 p.m. PDT, July 23) – Tropical Storm Georgette intensifies into a Category 1 hurricane about 1,025 mi (1,650 km) southwest of the Baja California peninsula. 18:00 UTC (11:00 a.m. PDT) – Hurricane Georgette intensifies into a Category 2 hurricane about 1,105 mi (1,780 km) southwest of the Baja California peninsula.

July 25 00:00 UTC (5:00 p.m. PDT, July 24) – Hurricane Georgette intensifies into a Category 3 hurricane about 1,130 mi (1,820 km) southwest of the Baja California peninsula.