( Usually ( , ( ( when ( forecasters ( say ( ( a ( low-pressure area ) ) ( is ( moving ( toward ( your region ) ) ) ) ) ) ) ) ( , ( ( ( ( cloudy weather ) and ) precipitation ) ( often ( ( result ( as ( ( the ( low-pressure area ) ) approaches ) ) ) . ) ) ) ) ) ) )
(ROOT (S (ADVP (RB Usually)) (, ,) (SBAR (WHADVP (WRB when)) (S (NP (NNS forecasters)) (VP (VBP say) (SBAR (S (NP (DT a) (JJ low-pressure) (NN area)) (VP (VBZ is) (VP (VBG moving) (PP (IN toward) (NP (PRP$ your) (NN region)))))))))) (, ,) (NP (NP (JJ cloudy) (NN weather)) (CC and) (NP (NN precipitation))) (ADVP (RB often)) (VP (VBP result) (SBAR (IN as) (S (NP (DT the) (JJ low-pressure) (NN area)) (VP (VBZ approaches))))) (. .)))
Usually, when forecasters say a low-pressure area is moving toward your region, cloudy weather and precipitation often result as the low-pressure area approaches.
(ROOT (S (NP (JJ Cloudy) (NNS conditions)) (VP (MD will) (ADVP (RBS most) (RB likely)) (VP (VB result) (PP (IN from) (NP (DT a) (JJ low-pressure) (NN weather) (NN system))))) (. .)))
Cloudy conditions will most likely result from a low-pressure weather system.