Tropical Storm Sebastien has formed over the Atlantic waters about 250 miles northeast of the Leeward Islands.
Sebastien has maximum winds of 45 mph and a central pressure of 1006 millibars. The system is moving northwest at 12 mph.
Sebastien is forecast to turn northward and merge with a cold front later this week. It should not affect any land areas. Hurricane season comes to an end November 30th.