yellow alert
Preliminary warning status
Yellow alert is a state of heightened readiness or caution, one step below the most urgent level.
In military and emergency contexts, it signals potential danger requiring increased vigilance but not immediate action: The base went to yellow alert when radar detected unidentified aircraft.
The term follows the traffic-light color scheme where yellow means caution and red means stop or danger.
- cautionCareful attention to risk
- warningAlert about danger
- early warningAlert before event occurs
- standbyReady substitute awaiting use
- alarmUrgent warning signal
danger · hazard · security breach · klaxon · siren · Star Trek · bridge · condition · status · amber · watchful · vigilance · threat · tension · protocol · emergency · ready · stations
- alarmsalarm, fire alarm, smoke alarm, burglar alarm, car alarm
- alertsalarm, warning, notification, push notifications, tornado watch
- alert levelsDEFCON, elevated, guarded, low, moderate
- readinessready, prepared, set, primed, poised
yellow alertred alert
Top emergency warning state
all clear · code red · imminent threat · battle stations · general quarters
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