predictive

being a sign of a later course of events <unfortunately, the stock market crash of 1929 turned out to be a predictive event, for the next decade was consumed by the Great Depression> Synonyms propheticRelated Words apocalyptic (also apocalyptical), millenarian; baleful, dire, foreboding, menacing, portentous, sinister, threatening; inauspicious, unpromising; oracular; revelatory, tellingNear Antonyms auspicious, promising, propitious, rosy