Slow-moving system develops in open Atlantic
Tropical Depression Six formed southwest of the Azores on September 19, with maximum sustained winds of about 35 mph and no expected threat to land. The system was moving slowly across the open Atlantic, giving forecasters an unusual late-season feature to monitor during what had been a notably quiet year for the basin.
The depression developed from the disturbance previously tracked as Invest 99L. Forecast information cited by Fox Weather placed it well away from populated areas and moving at roughly 2 mph. The projected track called for the cyclone to meander through the weekend before an approaching dip in the jet stream helped steer it southward into the central Atlantic.
A tropical depression is the lowest named classification for a tropical cyclone, covering systems whose maximum sustained winds remain below 39 mph. A system that crosses that threshold becomes a tropical storm and receives the next name on the seasonal list. In this case, the next Atlantic name would be Fay.
Limited strengthening window
The outlook contained some uncertainty about how long the depression would survive. One scenario allowed it to become a tropical storm on Sunday, while updated guidance indicated that significant strengthening was not expected and that the system could instead dissipate. Both assessments kept it over water and away from land. That distinction matters because a stronger classification would change the system's name and wind category, but not necessarily its practical impact.
The cyclone arrived against an exceptionally subdued Atlantic season. No hurricane was active in the basin when the depression formed, and the season had already set a record for the latest occurrence of its first hurricane, according to the forecast account. Conditions associated with a developing strong El Niño were described as suppressing Atlantic storm formation while helping support more activity in the Pacific.
The contrast between the basins had been sharp. The Pacific had produced multiple hurricanes and impacts around Hawaii and the U.S. West Coast, while the Atlantic remained comparatively calm. Tropical Depression Six therefore attracted attention less because it threatened communities than because it interrupted a long quiet stretch.
Forecasters were continuing to watch its organization, wind speed and steering currents. With the system moving slowly, small changes in atmospheric conditions could determine whether it briefly reached tropical-storm strength or weakened over the central Atlantic. The consistent element in the outlook was the absence of a land threat, leaving the depression primarily a meteorological marker in an unusual hurricane season.
