Professor Marvel:
Better get under cover, Sylvester. There's a storm blowin' up - a whopper, to speak in the vernacular of the peasantry. Poor little kid, I hope she gets home all right.
This quote occurs at 00:14:56-00:15:06 in the video.
Dorothy Gale is swept away from a farm in Kansas to a magical land of Oz in a tornado and embarks on a quest with her new friends to see the Wizard who can help her return home in Kansas and help her friends as well.