tropical storm sebastien formed on august 20 from a tropical wave just east of the lesser antilles. sebastien remained rather weak, moving northwest through light wind shear. sebastien took a sharp turn and started moving south-southwest. on october 24, sebastien weakened to a depression and made landfall in anguilla. by this time, sebastien had entered a low level flow as well as increasing wind shear. on october 25 sebastien dissipated over the northern caribbean sea. although its remnants still caused heavy rain over hispaniola and puerto rico.