page_title: Timeline of the 2015 Pacific hurricane season
section_title: August
hierarchical_section_title: Timeline of the 2015 Pacific hurricane season / Timeline of events / August
caption_attribution_description: English: Tropical Depression Kilo (03C) and Hurricane Loke (04C) in the central Pacific Ocean
context_page_description: The 2015 Pacific hurricane season was the second-most active Pacific hurricane season on record, and featured the strongest tropical cyclone ever observed in the Western Hemisphere: Hurricane Patricia. 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 Northeastern Pacific tropical cyclone basin. The season's first storm, Hurricane Andres, developed on May 28; the season's final storm, Tropical Depression Nine-C, dissipated on December 31, well after the official end of the season.
  Throughout the season, 31 tropical depressions developed, 26 of which became tropical storms, a record-tying 16 of them reached hurricane strength, and a record-breaking 11 achieved major hurricane intensity. Activity in the Central Pacific shattered records, with 16 tropical cyclones forming in or entering the basin; the previous highest was 11 during the 1992 and 1994 seasons.
context_section_description: August 2
  00:00 UTC (2:00 p.m. HST, August 1) – Hurricane Guillermo crosses west of 140°W and enters the Central Pacific basin.
  18:00 UTC (8:00 a.m. HST) at 14.9°N 143.7°W – Hurricane Guillermo weakens to Category 1 intensity about 820 mi (1,320 km) southeast of Hilo, Hawaii.
  August 3
  12:00 UTC (2:00 a.m. HST) at 16.6°N 145.7°W – Hurricane Guillermo weakens to a tropical storm approximately 655 mi (1,050 km) east-southeast of Hilo, Hawaii.
  August 6
  00:00 UTC (5:00 p.m. PDT, August 5) at 12.4°N 129.2°W – Tropical Depression Ten-E develops from a tropical wave about 1,495 mi (2,405 km) west-southwest of Cabo San Lucas, Mexico.
  12:00 UTC (5:00 a.m. PDT) at 12.6°N 131.5°W – Tropical Depression Ten-E strengthens into Tropical Storm Hilda roughly 1,585 mi (2,550 km) west-southwest of Cabo San Lucas, Mexico.
  August 7
  00:00 UTC (2:00 p.m. HST, August 6) at 21.6°N 155.4°W – Tropical Storm Guillermo weakens to a tropical depression roughly 130 mi (215 km) north of Hilo, Hawaii.
  12:00 UTC (2:00 a.m. HST) at 22.5°N 158.1°W – Tropical Depression Guillermo degenerates into a remnant low about 85 mi (140 km) north-northwest of Honolulu, Hawaii.
  18:00 UTC (11:00 a.m. PDT) at 12.6°N 137.6°W – Tropical Storm Hilda strengthens to a Category 1 hurricane approximately 1,260 mi (2,025 km) east-southeast of Hilo, Hawaii.
  August 8
  00:00 UTC (5:00 p.m. PDT, August 6) at 12.8°N 139.0°W – Hurricane Hilda rapidly intensifies to Category 3 strength about 1,170 mi (1,880 km) east-southeast of Hilo, Hawaii.
  06:00 UTC (8:00 p.m. HST, August 6) – Hurricane Hilda crosses west of 140°W and enters the Central Pacific basin.
  18:00 UTC (8:00 a.m. HST) at 13.6°N 142.8°W – Hurricane Hilda strengthens to Category 4 intensity about 915 mi (1,475 km) east-southeast of Hilo, Hawaii. It simultaneously reaches its peak strength with winds of 145 mph (230 km/h) and a pressure of 937 mbar (hPa; 27.67 inHg).
  August 9
  12:00 UTC (2:00 a.m. HST) at 14.5°N 146.2°W – Hurricane Hilda weakens to Category 3 status roughly 690 mi (1,110 km) east-southeast of Hilo, Hawaii.
  18:00 UTC (8:00 a.m. HST) at 14.8°N 147.1°W – Hurricane Hilda weakens to Category 2 intensity about 625 mi (1,010 km) southeast of Hilo, Hawaii.
  August 10
  18:00 UTC (8:00 a.m. HST) at 16.2°N 150.0°W – Hurricane Hilda weakens to Category 1 intensity about 415 mi (665 km) southeast of Hilo, Hawaii.
  August 12
  00:00 UTC (2:00 p.m. HST, August 11) at 17.1°N 151.5°W – Hurricane Hilda weakens to a tropical storm approximately 295 mi (475 km) southeast of Hilo, Hawaii.
  August 13
  18:00 UTC (8:00 a.m. HST) at 16.5°N 154.2°W – Tropical Storm Hilda weakens to a tropical depression roughly 230 mi (370 km) south-southeast of Hilo, Hawaii.
  August 14
  00:00 UTC (2:00 p.m. HST, August 13) at 16.0°N 155.3°W – Tropical Depression Hilda degenerates into a remnant low about 255 mi (415 km) south of Hilo, Hawaii.
  August 16
  00:00 UTC (6:00 p.m. MDT, August 15) at 16.5°N 112.9°W  – Tropical Depression Eleven-E develops from an area of low pressure about 485 mi (780 km) south-southwest of Cabo San Lucas, Mexico. Simultaneously, the depression attains peak winds of 35 mph (55 km/h) and a minimum pressure of 1003 mbar (hPa; 29.62 inHg).
  August 18
  00:00 UTC (6:00 p.m. MDT, August 17) at 23.5°N 123.4°W  – Tropical Depression Eleven-E degenerates into a remnant low about 865 mi (1,390 km) west of Cabo San Lucas, Mexico.
  August 21
  00:00 UTC (2:00 p.m. HST, August 20) at 14.8°N 177.5°W – Tropical Depression Four-C develops about 545 mi (880 km) west-southwest of Johnston Island.
  18:00 UTC (8:00 a.m. HST) at 16.1°N 177.2°W – Tropical Depression Four-C intensifies to Tropical Storm Loke roughly 510 mi (820 km) west of Johnston Island.
  August 22
  06:00 UTC (8:00 p.m. HST, August 21) at 13.2°N 155.8°W – Tropical Depression Kilo forms from a low-pressure area about 450 mi (730 km) south of Hilo, Hawaii.
  12:00 UTC (2:00 a.m. HST) at 17.2°N 177.9°W – Tropical Storm Loke weakens to a tropical depression about 555 mi (895 km) west of Johnston Island.
  August 23
  00:00 UTC (2:00 p.m. HST, August 22) at 18.4°N 179.0°W – Tropical Depression Loke restrengthen
caption: Hurricane Loke (top) and Tropical Depression Kilo (bottom) on August 25
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