Related Clues:
- Sign for the superstitious
- Overcast sky, say
- Broken mirror, to some
- Soothsayer's clue
- Review
- Parting of the heavens, maybe
- Verne character moving against the tide?
- Seer's sign
- Warning sign
- Telltale sign
- Sign of things to come
- Forewarning
- Sign of foreboding
- Dark clouds on the horizon, say
- Portentous event