Nana (2008)

A tropical wave that moved off the west coast of Africa on 6 October 2008 developed into a tropical depression about 0600 UTC October 12 while centered roughly 690 nautical miles west of the Cape Verde Islands. The system strengthened to Tropical Storm Nana six hours later and moved generally west‑northwest. Nana reached its peak late on October 12–early October 13, then weakened to a depression by October 13 and became a non‑convective remnant low on October 14. The remnant low turned northwest and dissipated about 1200 UTC October 15 roughly 820–870 nautical miles east‑northeast of the Leeward Islands.

Nana remained over the open tropical Atlantic and did not approach any land; no watches or warnings were issued. There were no landfalls associated with this storm.

The storm’s maximum sustained winds peaked at 35 knots (about 40 mph) and its minimum central pressure was estimated at 1004 mb at 0000 UTC October 13. At peak intensity Nana was below hurricane strength (tropical storm).

Because Nana remained well offshore and quickly lost organized thunderstorms, there were no measured storm surge reports and no notable rainfall impacts on land listed in the official record. No ship reports of tropical‑storm‑force winds were received.

There were no reports of damage or casualties—no direct or indirect deaths were attributed to Nana. The cyclone’s main impacts were limited to the open ocean.

Noteworthy items from analysis and forecasting: satellite and scatterometer (QuikSCAT) data were important for determining the peak winds and timing of genesis. The storm’s formation was well forecast in the Tropical Weather Outlooks, and official track and intensity forecast errors for Nana were smaller than the long‑term averages for the limited sample of forecasts.