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Tsunami Warning Communications Test (North Coast)

March 29, 2023, 11 am - 12 pm ()

Event Location:
Del Norte, Humboldt, and Mendocino Counties Only

TV*, Radio, Outdoor Sirens, NOAA Weather Radios

*Not all Cable and Satellite TV Stations May Be Able to Participate


Event Contact:
Ryan Aylward, National Weather Service,

Annual test of Tsunami Warning System to ensure it works properly during a real tsunami emergency

Full Description:


If you are watching television between 11:00 a.m. and 12:00 Noon on Wednesday morning, expect to see a crawler at the bottom of the screen indicating that a tsunami warning has been issued and hear a voice indicating that it is only a test. If you don’t hear the TV audio, please remember that this is only a test.

If you are listening to the radio, you will hear alerting tones followed by a voice announcing that the test is occurring. If you have a NOAA weather radio with the Public Alert feature, the radio will automatically turn on and you will hear the same message as broadcast on radios.

In some areas, you may also hear the sounding of a tsunami siren, an airplane testing its public address system (possibly as late as 1 pm), or receive other communication tests in some local jurisdictions.

The Wireless Emergency Alert (WEA) system will NOT be activated for this test.

Please help us by providing any feedback for this test by emailing