( LOW ( PRESSURE ( ( AREA ( ( An area ) ( of ( ( minimum ( barometric pressure ) ) ( usually ( bringing ( stormy weather ) ) ) ) ) ) ) . ) ) )
(ROOT (S (ADVP (RB LOW)) (NP (NNP PRESSURE)) (VP (VBZ AREA) (NP (NP (DT An) (NN area)) (PP (IN of) (NP (NP (JJ minimum) (JJ barometric) (NN pressure)) (VP (ADVP (RB usually)) (VBG bringing) (NP (JJ stormy) (NN weather))))))) (. .)))
LOW PRESSURE AREA An area of minimum barometric pressure usually bringing stormy weather.
(ROOT (S (NP (PRP You)) (VP (MD can) (VP (VB expect) (ADJP (JJ stormy)) (SBAR (IN if) (S (NP (NP (DT a) (NN center)) (PP (IN of) (NP (JJ low) (NN pressure)))) (VP (VBZ is) (VP (VBG moving) (NP (PRP$ your) (NN way)))))))) (. .)))
You can expect stormy if a center of low pressure is moving your way.