Tropical Depression Five has formed in the eastern Pacific as of this afternoon. This is the fifth storm to form within the past few weeks, and the majority of them have moved in a very similar pattern.
TD Five comes after Hurricane Blas, and is currently following Hurricane Celia. Blas was a very intense hurricane, and churned up lots of deeper water, cooling the surface water temperatures along its track. This has proven to be a difficulty for Celia, as it is much weaker than expected by this point.
Because the track of Tropical Depression Five is expected to take a similar track, I would imagine it will struggle to strengthen in the same way. However, right now it looks good, and will likely strengthen to a Tropical Storm soon.