Eleven (2022)

A tropical wave that moved off the west coast of Africa in mid-September gradually organized over the central tropical Atlantic and became Tropical Depression Eleven around 0000 UTC 28 September 2022, about 525 nautical miles west of the Cabo Verde Islands. The system moved generally northward then northwestward beneath a ridge and lasted only about 36–48 hours as a tropical cyclone. Increasing wind shear and dry air caused its thunderstorms to wane, and it became a post-tropical remnant low by 1200 UTC 29 September and quickly dissipated into a trough later that day.

There were no landfalls. The depression remained over open water across the central tropical Atlantic during its entire life and did not approach any coastlines where watches or warnings were required.

The depression’s peak intensity was estimated at 30 knots (35 mph) with a minimum central pressure of 1008 mb, corresponding to a weak tropical depression (below tropical storm strength). Satellite scatterometer (ASCAT) passes and Dvorak classifications supported the 30‑kt peak estimate. After reaching that brief peak near formation, its winds decreased to about 25 kt as convection became less organized.

Because the system stayed well offshore, there were no storm surge reports, and no significant rainfall totals were recorded for populated locations. Observations used in the analysis came from satellites and scatterometer passes rather than coastal or ship reports.

There were no reports of damage or casualties associated with this system. Forecasts and outlooks performed reasonably well: the potential for development was first highlighted nearly a week before formation, and genesis location and short-lived nature were well anticipated even though the depression dissipated sooner than some intensity forecasts expected.