At 11am today (Friday) NHC discontinued advisories on Dolly since it has degenerated into an open wave.
What does that mean? In order to be classified as a tropical cyclone, a storm must have a closed circulation. Here is the analysis of Tropical Storm Karina, annoying the fish well offshore from Mexico:
Notice the arrows make a circular pattern in the interior, slightly pointed inward, showing the air is spraling in to the center of the storm. A hurricane would have a much more distinct pattern, Karina is a storm undergoing development, will try to remember to post Now compare with Dolly:
Notice it’s more of a “kink” in the wind field, no closed circulation. This is characteristic of a tropical wave, and means the storm isn’t developing.
NHC still cautions that heavy rains are possible across the mountainous areas of the northern Caribbean as the wave continues tracking west.