forewarn

When the demolition crews arrived Monday at the White House, there had been no forewarning.

The best bet is that they’re coming back, so consider this a forewarning.

It may be best to roll it out slowly, with trial periods and plenty of forewarning to markets.

Because the U.S. and Israel had forewarning, the attack resulted in little damage and no loss of life.

Be forewarned that the notifications are not 100% accurate; drivers will occasional mark a package delivered prematurely, then bring it to your doorstep a day or two later.