Remove the fell (tissue-like covering) from roast with a sharp knife. Place roast in a greased roasting pan. Arrange potatoes, carrots, and celery in pan. Combine remaining ingredients; pour over roast.
Cover and bake at 350° for 1 1/2 hours. Uncover and continue baking for 30 minutes or until roast is tender, basting frequently with pan drippings.
Transfer roast and vegetables to a warm serving platter. Let roast stand 10 minutes before slicing.