page_title: Timeline of the 1990 Pacific hurricane season
section_title: September
hierarchical_section_title: Timeline of the 1990 Pacific hurricane season / Timeline of events / September
caption_attribution_description: Hurricane Odile near peak strength on 1990-09-26
context_page_description: The 1990 Pacific hurricane season saw a then-record 16 hurricanes form. Throughout the year, 21 tropical cyclones became named storms in the eastern Pacific Ocean. Hurricane Alma formed on May 12, 1990, three days before the season's official start on May 15. The Central Pacific hurricane season began on June 1, covering tropical cyclone formation in the region between 140°W and International Dateline. Hurricane Trudy was the last storm to dissipate, doing so on November 1, nearly a month before the Pacific hurricane season officially ended on November 30.
  The season produced twenty-seven tropical depressions, of which twenty-one became named storms, and sixteen strengthened into hurricanes. Six out of the sixteen hurricanes strengthened into major hurricanes. Despite high levels of activity, Rachel was the only system to make landfall, bringing floods to Northwestern Mexico and the Southwestern United States. Thousands were left homeless, and there were 18 confirmed fatalities. Additionally, the remnants of Hurricane Boris brought light showers to California.
context_section_description: September 1
  1800 UTC (11 a.m. PDT) – Tropical Depression Lowell dissipates about 1,230 mi (1,980 km) east of Hilo.
  September 7
  1200 UTC (5 a.m. PDT) – Tropical Depression Sixteen-E originates from a tropical wave while situated about 870 mi (1,400 km) southwest of Socorro Island.
  September 8
  1200 UTC (5 a.m. PDT) – Tropical Depression Sixteen-E strengthens into Tropical Storm Marie.
  September 9
  0600 UTC (11 p.m. PDT September 8) – Tropical Storm Marie is upgraded into a Category 1 hurricane.
  1800 UTC (11 a.m. PDT) – Tropical Depression Eighteen-E forms about 225 mi (360 km) southwest of Acapulco.
  September 10
  0000 UTC (5 p.m. PDT September 9) – Hurricane Marie strengthens into a Category 2 hurricane.
  0000 UTC (5 p.m. PDT September 9) – Tropical Depression Seventeen-E develops from a tropical wave while located about 455 mi (730 km) south-southwest of Socorro Island.
  1200 UTC (5 a.m. PDT) – Hurricane Marie strengthens into a Category 3 hurricane.
  1800 UTC (11 a.m. PDT) – Tropical Depression Seventeen-E strengthens into Tropical Storm Norbert.
  September 11
  0000 UTC (5 p.m. PDT September 10) – Hurricane Marie strengthens into a Category 4 hurricane.
  0300 UTC (8 p.m. PDT September 10) – Hurricane Marie attains its peak intensity with winds of 140 mph (220 km/h) and a minimum pressure of 944 mbar (27.9 inHg).
  September 12
  0000 UTC (5 p.m. PDT September 11) – Hurricane Marie weakens to a Category 3 hurricane.
  1200 UTC (5 a.m.PDT) – Hurricane Marie weakens to a Category 2 hurricane.
  1800 UTC (11 a.m. PDT) – Tropical Depression Eighteen-E dissipates about 30 mi (50 km) northwest of Clarion Island.
  September 13
  1800 UTC (11 a.m. PDT) – Hurricane Marie regains Category 3 hurricane strength.
  September 14
  0000 UTC (5 p.m. PDT September 13) – Tropical Storm Norbert strengthens into a Category 1 hurricane.
  1200 UTC (3 a.m. HST) – Hurricane Marie moves into the Central Pacific Hurricane Center's area of responsibility.
  September 15
  0600 UTC (11 p.m. PDT September 14) – Hurricane Norbert attains its peak intensity with maximum sustained winds of 80 mph (130 km/h) and a minimum barometric pressure of 983 mbar (29.0 inHg).
  1800 UTC (11 a.m. PDT) – Hurricane Norbert weakens to a tropical storm.
  September 16
  1800 UTC (9 a.m. HST) – Hurricane Marie rapidly weakens into a Category 1 hurricane.
  September 17
  0600 UTC (9 p.m. HST September 16) – Hurricane Marie weakens back to tropical storm status.
  September 18
  0600 UTC (11 p.m. PDT September 17) – Tropical Storm Norbert weakens to a tropical depression.
  September 19
  0000 UTC (3 p.m. HST September 18) – Tropical Storm Marie weakens to a tropical depression.
  1800 UTC (11 a.m. PDT) – Tropical Depression Norbert dissipates about 1,165 mi (1,875 km) southwest of San Francisco, California.
  September 21
  0000 UTC (3 p.m. HST September 20) – Tropical Depression Marie dies about 400 mi (640 km) south-southwest of Honolulu, Hawaii.
  September 23
  1200 UTC (5 a.m. PDT) – Tropical Depression Nineteen-E develops from an area of disturbed weather while located approximately 565 mi (910 km) south-southeast of Socorro Island.
  September 24
  0600 UTC (11 p.m. PDT September 23) – Tropical Depression Nineteen-E strengthens into Tropical Storm Odile.
  September 25
  1200 UTC (5 a.m. PDT) – Tropical Storm Odile intensifies into a Category 1 hurricane.
  1800 UTC (11 a.m. PDT) – Hurricane Odile strengthens into a Category 2 hurricane.
  September 26
  0600 UTC (11 p.m. PDT September 25) – Hurricane Odile strengthens into a Category 3 hurricane.
  1200 UTC (5 a.m. PDT) – Hurricane Odile strengthens into a Category 4 hurricane. Simultaneously, Odile attains its peak intensity with maximum sustained winds of 145 mph (230 km/h) and a minimum barometric pressure of 935 mbar (27.6 inHg).
  September 27
  0000 UTC (5 p.m. PDT September 26) – Tropical Depression Twenty-E develops from a tropical wave while centered about 235 mi (380 km) south of Acapulco.
  September 28
  0000 UTC (5 p.m. PDT September 27) – Hurricane Odile weakens to a Category 3 hurricane.
  0600 UTC (11 p.m. PDT September 27) – Hurricane Odile weakens to a Category 2 hurricane.
  
caption: Hurricane Odile near peak intensity on September 26, 1990
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