How does the opening set the tone for the novel?

Certainly the tone in this chapter is set by the weather. Brontë begins to develop the natural setting of the novel by describing snowstorms and the moors, and it becomes clear that the bleak and harsh nature of the Yorkshire hills is not merely a geographical accident. It mirrors the roughness of those who live there: Wuthering Heights is firmly planted in its location and could not exist anywhere else. Knowing Emily Brontë's passionate fondness for her homeland, we can expect the same bleakness which Lockwood finds so disagreeable to take on a wild beauty. Its danger cannot be forgotten, though: a stranger to those parts could easily lose his way and die of exposure. Heathcliff and the wind are similar in that they have no pity for weakness. The somewhat menacing presence of the natural world can also be seen in the large number of dogs who inhabit Wuthering Heights: they are not kept for pets.