Forshadowing is an advance sign or warning of what is it to come in the future .The water wrait was shrieking
Answers
"The water-wraith was shrieking" means that the waters of Lochgyle became tempest-tossed as Lord Ullin's daughter and her beloved attempt to cross the water. The storm is so fierce that it seems like a "wraith," or ghost, is crying out in anger in the water. In addition, the heavens look like faces are scowling, or frowning in anger. The water-wraith and the scowling heavens are examples of personification, as the water and heaven appear to have human-like qualities. The wraith in the water and the scowl of the heavens also portend the death of those crossing the water. It is almost as if nature itself is conspiring against Lord Ullin's daughter for going against her father and running away with the chieftain. In the end, she and her beloved become wraiths, or ghosts, themselves as they drown in the churning waters of the loch.