( ( The ( Aleutian Low ) ) ( ( is ( ( an area ) ( of ( ( almost constant ) ( stormy weather ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NNP Aleutian) (NNP Low)) (VP (VBZ is) (NP (NP (DT an) (NN area)) (PP (IN of) (NP (ADJP (RB almost) (JJ constant)) (JJ stormy) (NN weather))))) (. .)))
The Aleutian Low is an area of almost constant 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.