page_title: Timeline of the 2009 Atlantic hurricane season
section_title: October
hierarchical_section_title: Timeline of the 2009 Atlantic hurricane season / Timeline of events / October
caption_attribution_description: English: Track map of Tropical Storm Grace of the 2009 Atlantic hurricane season. The points show the location of the storm at 6-hour intervals. The colour represents the storm's maximum sustained wind speeds as classified in the Saffir–Simpson scale (see below), and the shape of the data points represent the nature of the storm, according to the legend below. Saffir–Simpson scale Tropical depression≤38 mph≤62 km/h Category 3111–129 mph178–208 km/h Tropical storm39–73 mph63–118 km/h Category 4130–156 mph209–251 km/h Category 174–95 mph119–153 km/h Category 5≥157 mph≥252 km/h Category 296–110 mph154–177 km/h Unknown Storm type Tropical cyclone Subtropical cyclone Extratropical cyclone / Remnant low / Tropical disturbance / Monsoon depression
context_page_description: The 2009 Atlantic hurricane season was an event in the annual tropical cyclone season in the north Atlantic Ocean. It was below-average Atlantic hurricane season with nine named storms, the fewest since the 1997 season. The season officially began on June 1, 2009, and ended on November 30, 2009, dates that conventionally delimit the period of each year when most tropical cyclones develop in the Atlantic basin. The first storm to form was Tropical Depression One on May 28, 2009, while the last storm, Hurricane Ida, dissipated on November 11.
  Of the year's nine named storms, three became hurricanes with two intensifying further into major hurricanes. The inactivity throughout the basin was linked to the formation of an El Niño, which increased wind shear. The two most significant storms of the season, in terms of loss of life and damage, were Hurricanes Bill and Ida. Hurricane Bill was an unusually large storm and was also the season's strongest, attaining winds of 135 mph. Tropical Storm Claudette was the only storm during 2009 to make landfall in the United States; Hurricane Ida became extratropical shortly before coming ashore in Alabama.
context_section_description: October 4
  2:00 a.m. AST (0600 UTC) – Tropical Storm Grace forms out of an extratropical system roughly 135 mi (225 km) west of Lajes, Azores, becoming the northeasternmost forming cyclone in the Atlantic on record.
  8:00 p.m. AST (0000 UTC on October 5) – Tropical Storm Grace attains its peak winds of 65 mph (100 km/h).
  October 5
  2:00 p.m. AST (1800 UTC) – Tropical Storm Grace attains its minimum pressure of 986 mbar (hPa; 29.11 inHg).
  8:00 p.m. AST (0000 UTC on October 6) – The tenth tropical depression of the season forms roughly 775 mi (1,250 km) east of the Lesser Antilles.
  October 6
  2:00 a.m. AST (0600 UTC) – Tropical Storm Grace transitions into an extratropical cyclone roughly 230 mi (370 km) west-southwest of Cork, Ireland.
  2:00 a.m. AST (0600 UTC) – The tropical depression east of the Lesser Antilles strengthens into Tropical Storm Henri.
  October 7
  2:00 a.m. AST (0600 UTC) – Tropical Storm Henri attains its peak intensity with winds of 50 mph (85 km/h) and a minimum pressure of 1005 mbar (hPa; 29.68 inHg).
  October 8
  2:00 a.m. AST (0600 UTC) – Tropical Storm Henri weakens to a tropical depression.
  2:00 p.m. AST (1800 UTC) – Tropical Depression Henri degenerates into a remnant low roughly 155 mi (250 km) north of Anguilla.
caption: Track of Tropical Storm Grace
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