forewarning

the act or an instance of telling beforehand of danger or risk <heeded the forewarning to stay off the ice until the town had checked to see if it was thick enough> Synonyms admonishment, admonition, alarm (also alarum), alert, caution, warning, heads-up, noticeRelated Words auguring, augury, forecasting, foretelling, predicting, prediction, premonition, presaging, prognosticating, prophecy (also prophesy), prophesying; apprising, informing, notification, notifying, tip-off; advice, counsel, guidance, recommendation, suggestion, tip; announcement, declaration