Alert Incident
Tsunami
Alert Priority
Watch
Warning Instructions
Watches are updated at least hourly to continue them, expand their coverage, upgrade them to a Warning, or end the alert. A Watch for a particular area may be included in the text of the message that disseminates a Warning for another area.
CAP Warning Category
Geophysical
CAP Warning Certainty
Unknown
CAP Warning Severity
Extreme
CAP Warning Urgency
Unknown
CAP Warning Response Type
Monitor
Description
The second highest level of tsunami alert. Watches are issued by the TWCs based on seismic information without confirmation that a destructive tsunami is underway. It is issued as a means of providing an advance alert to areas that could be impacted by destructive tsunami waves.
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