yellow alert

noun

(in military or civilian defense) the first alert given when enemy aircraft are discovered approaching a military installation, city, coastline, etc. Compare blue alert, red alert, white alert.
the signal or alarm sounded for this alert.
any primary stage of alert, as when toxic chemicals have escaped in a particular area and a potential hazard exists.

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Word History and Origins

Origin of yellow alert¹

First recorded in 1965–70

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Example Sentences

Examples have not been reviewed.

It has issued a yellow alert which means that the heat is tolerable for the general public but can cause moderate health concerns for infants, the elderly and people with chronic diseases.

From

The yellow alert for strong winds, which may lead to some disruption, covers all of Northern Ireland and comes into effect at 03:00 GMT on Sunday until 15:00.

From

But a yellow alert, issued by Caledonian MacBrayne on Sunday, said it may be subject to delay or cancellation due to high winds.

From

In Northern Ireland, a yellow alert for snow and ice warning will be in place until 11:00 on Tuesday.

From

A yellow alert for snow and ice across Wales and parts of northwest and southwest England took effect at 17:00 on Monday, lasting until 10:00 on Tuesday.

From

yellow yellow archangel

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