The 1990 Atlantic hurricane season featured the most named storms of any hurricane season at the time. During the season, 14 tropical cyclones in the Atlantic Ocean became named storms. The season officially started on June 1, 1990, and ended on November 30. These dates, adopted by the convention, historically delimit the period each year when most Atlantic tropical systems form. However, storm formation is possible at any time of the year, as was the case this season, when Tropical Depression One formed on May 24; Hurricane Nana, the season's final storm, dissipated on October 21. The season produced 16 tropical depressions, of which 14 intensified into tropical storms, 8 became hurricanes, and 1 became a major hurricane. Although the season had the highest number of named storms at the time, it featured only two notable storms, primarily because many of the tropical cyclones remained either weak or at sea. The two most significant storms of the season, in terms of damage and loss of life, were Hurricane Diana and Tropical Storm Marco. However, the strongest tropical cyclone of the season was Hurricane Gustav. This timeline includes information that was not operationally released, meaning that data from post-storm reviews by the National Hurricane Center, such as a storm that was not operationally warned upon, has been included. This timeline documents tropical cyclone formations, strengthening, weakening, landfalls, extratropical transitions, and dissipations during the season. Timeline May May 24 1800 UTC (2:00 p.m. EDT) – Tropical Depression One develops roughly halfway between Limón, Honduras , and Cape San Antonio, Cuba. May 25 0000 UTC (8:00 p.m. EDT May 24) – Tropical Depression One attains its peak intensity with winds of 30 mph (45 km/h) and a minimum barometric pressure of 1007 mbar (hPa; 29.74 inHg). Between 1200 and 1800 UTC (8:00 a.m. and 2:00 p.m. EDT) – Tropical Depression One makes landfall near Guasimal, Matanzas, Cuba with winds of 30 mph (45 km/h). May 26 1200 UTC (8:00 a.m. EDT) – Tropical Depression One is absorbed by an approaching cold front while located about 45 miles (70 km) west of Key West, Florida. June June 1 The 1990 Atlantic hurricane season officially begins. July July 22 0600 UTC (2:00 a.m. EDT) – Tropical Depression Two develops about 1,345 miles (2,165 km) east of Port-of-Spain, Trinidad. July 24 1200 UTC (8:00 a.m. EDT) – Tropical Depression Two intensifies into Tropical Storm Arthur. 1200