Ominous Sky

And the Raven, never flitting, still is sitting, still is sitting
On the pallid bust of Pallas just above my chamber door;
And his eyes have all the seeming of a demon's that is dreaming,
And the lamp-light o'er him streaming throws his shadow on the floor;
And my soul from out that shadow that lies floating on the floor
Shall be lifted-nevermore!
The ominous sky represents the narrator's dark and foreboding mood, reflecting his fear and hopelessness in the face of the Raven's persistent presence and his own inner demons.