( However ( , ( ( in ( mountainous areas ) ) ( ( ( local topography ) also ) ( ( ( ( has ( a ( significant effect ) ) ) , ) ( with ( winds ( tending ( to ( ( blow along ) ( well ( defined valleys ) ) ) ) ) ) ) ) . ) ) ) ) )
(ROOT (S (ADVP (RB However)) (, ,) (PP (IN in) (NP (JJ mountainous) (NNS areas))) (NP (NP (JJ local) (NN topography)) (ADVP (RB also))) (VP (VBZ has) (NP (DT a) (JJ significant) (NN effect)) (, ,) (PP (IN with) (NP (NP (NNS winds)) (VP (VBG tending) (S (VP (TO to) (VP (VB blow) (PRT (RP along)) (ADVP (RB well) (NP (CD defined) (NNS valleys)))))))))) (. .)))
However, in mountainous areas local topography also has a significant effect, with winds tending to blow along well defined valleys.
(ROOT (S (NP (JJ Local) (NNS winds)) (VP (VB blow) (ADVP (RB only)) (PP (IN over) (NP (DT a) (JJ limited) (NN area)))) (. .)))