Related Clues:

• Thing observed by augurs
• Sign of a future event, good or bad
• Omen
• Indication of things to come
• Black cat crossing one's path, to some
• Gathering clouds, for one
• What may make the future tense?
• Supernatural sign
• Forewarning of submarine captain being sent back
• Sign on, receiving a note
• Warning captain, having dived, rejected
• Surfacing submariner's premonition
• Prophetic event
• A sign from John Galt
• Warning of momentous event