portend

portend \por-TEND\, verb:

To indicate (events, misfortunes, etc.) as in future; to foreshadow; to bode.

Although no humans were there to witness the giant comet of 65 million years ago, in this case it really did portend disaster.
-- Walter Alvarez, T. Rex and the Crater of Doom

With mortal crisis doth portend
My days to appropinque an end.
-- Samuel Butler, Hudibras. Part i. Canto iii. Line 589

I see five separate moving clouds of dust; they portend some sort of magic.
-- Laurie Fox, My Sister from the Black Lagoon: A Novel of My Life

Many signs portended a dark and stormy day.
-- Macaulay

Portend comes from Latin portendere, to indicate, to predict, from por- (variant of pro-), before + tendere, to stretch out, to spread. Thus that which portends is that which stretches out before us into the future.