It featured below-average tropical cyclone activity,[nb 1] with the fewest named storms since the 1997 season.
These dates, adopted by convention, historically describe the period in each year when most tropical systems form.
[2] The deadliest Atlantic storm of the season, Cristobal, barely touched land at all as it moved from Puerto Rico to Iceland in late August.
[2] This timeline documents tropical cyclone formations, strengthening, weakening, landfalls, extratropical transitions, and dissipations during the season.
Additionally, figures for maximum sustained winds and position estimates are rounded to the nearest 5 units (knots, miles, or kilometers), following the convention used in the National Hurricane Center's products.