1) Augur 2) Auspicate 3) Auspice 4) Bode 5) Caution 6) Denote 7) Foreshadow 8) Foreshow 9) Omen 10) Portend 11) Portent 12) Predict 13) Prefigure 14) Prognostication 1) Be prophetic 2) Boding 3) Foreboding 4) Foreshadow 5) Foretell 6) French word used in English 7) Indicate by signs 8) Omen 9) Portend 10) Premonition 11) Presentiment 12) Prophesy pears 13) Sign 14) To feel beforehand 15) To foreknow 16) To have a presentiment of 17) To make a prediction 18) Warning sign 
• (v. i.) To form or utter a prediction; -- sometimes used with of. • (v. t.) To have a presentiment of; to feel beforehand; to foreknow. • (v. t.) Power to look the future, or the exercise of that power; foreknowledge; presentiment. • (v. t.) To foretell; to predict; to foreshow; to indicate. • (v. t.) Something which fore...
Pre'sage noun [ French présage , Latin praesagium , from praesagire . See Presage , transitive verb ] 1. Something which foreshows or portends a future event; a prognostic; an omen; an augury. 'Joy and shout - - presage of victory.' ...Pre·sage' transitive verb [ imperfect & past participle Presaged (-sājd'); present participle & verbal noun Presaging . ] [ French présager , Latin praesagire : prae before + sagire to perceive acute...Pre·sage' intransitive verb To form or utter a prediction; -- sometimes used with of . Dryden. 
warning sign 
[n] - a foreboding about what is about to happen
noun a foreboding about what is about to happen
a foreboding about what is about to happen