( ( ( ( ( Watch ( for ( evening thunderstorms ) ) ) ( in ( coastal communities ) ) ) , ) ( where ( ( ( ( east winds ) and ) ( the ( gulf breezes ) ) ) ( ( collide , ) ( ( causing ( ( an eruption ) ( of ( ( friction and ) electricity ) ) ) ) ( in ( the sky ) ) ) ) ) ) ) . )
(ROOT (S (VP (VB Watch) (PP (IN for) (NP (NN evening) (NNS thunderstorms))) (PP (IN in) (NP (JJ coastal) (NNS communities))) (, ,) (SBAR (WHADVP (WRB where)) (S (NP (NP (JJ east) (NNS winds)) (CC and) (NP (DT the) (NN gulf) (NNS breezes))) (VP (VBD collide) (, ,) (S (VP (VBG causing) (NP (NP (DT an) (NN eruption)) (PP (IN of) (NP (NN friction) (CC and) (NN electricity)))) (PP (IN in) (NP (DT the) (NN sky))))))))) (. .)))
Watch for evening thunderstorms in coastal communities, where east winds and the gulf breezes collide, causing an eruption of friction and electricity in the sky.
(ROOT (S (NP (NN Friction) (NN force)) (VP (VBZ is) (VP (VBN caused) (PP (IN by) (NP (NP (JJ microscopic) (NNS bumps)) (, ,) (VP (VBZ lumps)) (, ,) (CC and) (NP (NP (NNS imperfections)) (VP (VBG colliding))))))) (. .)))