precursory

Preceding or preliminary; introductory.

Suggesting or indicating something to follow.

Preceding as a herald; forerunning; introductory; indicative of something to follow.

A precursor; an introduction.

Preceding as a precursor or harbinger; indicating something to follow.

An introduction.

Pertaining to events that will follow.

Of or pertaining to a precursor.

A precursor; a sign of the onset of something.

warning of future misfortune