A depression away from the coast
In discussion number 5 on 14 September, the National Hurricane Center described Tropical Depression Fifteen-E over the eastern Pacific, near 16.9°N and 120.5°W. It estimated winds at 30 knots and a generally westward motion. Visible satellite imagery showed the low-level center displaced from the strongest thunderstorms as northwesterly wind shear pushed convection aside and dry air entered the circulation.
Why the forecast can change
The NHC discussed a chance of modest strengthening, but shear and dry air made the intensity outlook uncertain. The system was well offshore; a tropical cyclone being named or numbered does not imply a coastal landfall. Wind, swell and marine warnings still matter to vessels near the storm.
This article fixes the observation to discussion number 5. Later NHC advisories can revise the position, intensity and classification. Use the current advisory archive before making a maritime decision.