(S (S (BASENP (DT The) (NN surge)) (VP (VP (VBZ has) (VP (VBN been) (VP (VBN caused) (PP (IN by) (NP (BASENP (DT the) (JJ high) (NN wind) (NNS speeds)) (PP (IN of) (NP (BASENP (QP (RB over) (NN 80)) (NNS miles)) (PP (IN per) (BASENP (NN hour)))))))))) (CONJP (COMMA ,) (CC and)) (VP (MD could) (VP (VB be) (NP (NP (NP (BASENP (RB over) (NN hurricane) (NN force)) (COMMA ,) (BASENP (JJ high) (NNS tides))) (CC and) (BASENP (JJ low) (NN pressure))) (PP (IN over) (BASENP (DT the) (NNP North) (NNP Sea)))))))) (PERIOD .))