Well, that was a real one-day-wonder.
Tropical Storm Gaston, whose computer models showed it nailing the island next Thursday, went 'poof.' It became what's called in the trade a 'remnant low," probably due to its sucking in a lot of dry air which kind of starved the storm for energy.
The National Weather Service cautions, however (that's their job) the mass of unstable air is still moving west and could get new energy.