page_title: Timeline of the 2004 Pacific hurricane season
section_title: September
hierarchical_section_title: Timeline of the 2004 Pacific hurricane season / Timeline of storms / September
caption_attribution_description: Saffir-Simpson Hurricane Scale TD TS 1 2 3 4 5 English: Hurricane Isis (2004) track. Uses the color scheme from the Saffir-Simpson Hurricane Scale.
context_page_description: The 2004 Pacific hurricane season had 17 tropical cyclones, of which 12 became named storms, 6 became hurricanes, and 3 became major hurricanes. This timeline documents all the storm formations, strengthening, weakening, landfalls, extratropical transitions, as well as dissipation. It also includes information which was not operationally released, meaning that information from post-storm reviews by the National Hurricane Center, such as information on a storm that was not operationally warned on, have been included. The season officially began on May 15, 2004 in the eastern Pacific proper and lasted until November 30 that same year. Areas east of 140°W are under the purview of the National Hurricane Center; the area between the International Date Line and 140°W, or the central Pacific, is under the purview of the Central Pacific Hurricane Center.
  The 2004 season got off to an early start with Tropical Storm Agatha, which formed a week after the season began. No tropical cyclones were active in June, the first such occurrence since 1969. July was more active, producing four tropical cyclones.
context_section_description: September 1
  11:00 p.m. PDT (06:00 UTC September 2) – Hurricane Howard rapidly intensifies and reaches Category 3 intensity.
  September 2
  5:00 a.m. PDT (12:00 UTC) – Hurricane Howard reaches Category 4 intensity. At the same time, it reaches its peak intensity of 140 mph (230 km/h).
  11:00 p.m. PDT (06:00 UTC September 3) – Hurricane Howard weakens into Category 3 intensity.
  September 3
  5:00 a.m. PDT (12:00 UTC) – Hurricane Howard weakens to Category 2 intensity.
  11:00 a.m. PDT (18:00 UTC) – Hurricane Howard weakens to Category 1 intensity.
  September 4
  5:00 a.m. PDT (12:00 UTC) – Hurricane Howard weakens into a tropical storm.
  11:00 p.m. PDT (06:00 UTC September 5) – Tropical Storm Howard weakens into a tropical depression.
  September 5
  11:00 a.m. PDT (18:00 UTC) – Tropical Depression Howard degenerates into a remnant low.
  September 7
  11:00 p.m. PDT (06:00 UTC September 8) – Tropical Depression Twelve-E forms about 530 miles (850 km) south of Cabo San Lucas.
  September 8
  11:00 a.m. PDT (18:00 UTC) – Tropical Depression Twelve-E becomes a tropical storm and is named Isis.
  September 10
  5:00 a.m. PDT (12:00 UTC) – Tropical Storm Isis weakens into a tropical depression.
  11:00 a.m. PDT (18:00 UTC) – Tropical Depression Thirteen-E forms about 350 miles (560 km) south-southeast of Salina Cruz, Mexico.
  September 11
  5:00 a.m. PDT (12:00 UTC) – Tropical Depression Thirteen-E becomes a tropical storm and is named Javier.
  5:00 p.m. PDT (00:00 UTC September 12) – Tropical Depression Isis restrengthens into a tropical storm.
  September 12
  11:00 a.m. PDT (18:00 UTC) – Tropical Storm Javier strengthens into a Category 1 hurricane.
  11:00 p.m. PDT (06:00 UTC September 13) – Hurricane Javier reaches Category 2 intensity.
  September 13
  5:00 a.m. PDT (12:00 UTC) – Hurricane Javier reaches Category 3 intensity.
  11:00 a.m. PDT (18:00 UTC) – Hurricane Javier reaches Category 4 intensity.
  5:00 p.m. PDT (00:00 UTC September 14) – Hurricane Javier reaches its peak intensity of 150 mph (240 km/h), making it the strongest storm of the season. At this time, it is located 310 miles (500 km) south-southwest of Manzanillo, Mexico.
  September 15
  5:00 a.m. PDT (12:00 UTC) – Tropical Storm Isis strengthens into a Category 1 hurricane. At the same time, it reaches its peak intensity of 75 mph (120 km/h), located 1,450 miles (2,335 km) west of Cabo San Lucas.
  11:00 a.m. PDT (18:00 UTC) – Hurricane Isis weakens back into a tropical storm as the eye collapses.
  5:00 p.m. PDT (00:00 UTC September 16) – Hurricane Javier weakens to Category 3 intensity.
  September 16
  5:00 a.m. PDT (12:00 UTC) – Tropical Storm Isis weakens into a tropical depression.
  11:00 a.m. PDT (18:00 UTC) – Tropical Depression Isis degenerates into a remnant low.
  September 17
  5:00 a.m. PDT (12:00 UTC) – Hurricane Javier weakens to Category 2 intensity.
  5:00 p.m. PDT (00:00 UTC September 18) – Hurricane Javier weakens to Category 1 intensity.
  September 18
  5:00 a.m. PDT (12:00 UTC) – Hurricane Javier weakens into a tropical storm.
  5:00 p.m. PDT (00:00 UTC September 19) – Tropical Storm Javier weakens into a tropical depression.
  September 19
  4:00 a.m. PDT (11:00 UTC) – Tropical Depression Javier makes landfall on the west coast of Baja California.
  11:00 a.m. PDT (18:00 UTC) – Tropical Depression Javier degenerates into a remnant low.
caption: Hurricane Isis track map
exif: {}