(meteorology, US) A warning issued by the United States National Weather Service that conditions are ideal for wildfires.

plural of content warning

plural of four-minute warning

(idiomatic) A UK Government public alert system in use during the Cold War to advise of an imminent nuclear attack. The "four-minute" adjective was not an accurate timing, but simply used as a euphemism to refer to the incoming attack as being from nuclear missiles.

(aviation) An onboard system used to avoid controlled flight into terrain (CFIT).

plural of Scarborough warning

A warning given too late to be useful.

A sign that indicates a danger, for example to vehicles on a road or of hazardous chemicals. / (figuratively) An indication that someone or something is in danger or at risk

plural of tactical warning

(military) A warning of an ongoing or immediately impending attack.