"The rain thickened as the train sped yet farther north;..." (J. K. Rowling)

"The rain thickened as the train sped yet farther north; the windows were now a solid shimmering grey, which gradually darkened until lanterns flickered into life all along the corridors and over the luggage racks. The train rattled, the rain hammered, the wind roared, but still, Professor Lupin slept."

SOURCE: "Harry Potter and the Prisoner of Azkaban" (J. K. Rowling)

Harry Potter, Ron Weasley and Hermione Granger are on their way back to Hogwarts for a third term of witchcraft and skullduggery.