early warning

British  

noun

1. advance notice of some impending event or development

---

Example Sentences

Evan’s symptoms seemed too minor to warrant a doctor’s appointment, but a simple blood test may have revealed his low hemoglobin level, an early warning sign.

From The Wall Street Journal

Because of this sensitivity, shifts in their populations can serve as early warning signs of ecological disruption.

From Science Daily

The Famine Early Warning Systems Network recently said 20 to 25 million people in Kenya, Somalia and Ethiopia need humanitarian food assistance, more than half because of drought.

From Barron's

He hadn’t registered it, but he had heard it because now it came back to him like an early warning.

From Literature

Standing at the defence of that massive landmass is an aging string of early warning radars, eight staffed military bases and about 100 full-time Coast Guard personnel covering 162,000km of coast, about 60% of Canada's total oceanfront.

From BBC