Tuesday, December 5, 2023

National Weather Service Will Conduct a Tsunami Warning Communications Test on March 29


The following is a press release issued by the County of Mendocino:

Waves battering the Mendocino Headlands. Two people can be seen on the bluffs that provide a sense of scale [Picture provided by Wynter Rose Berlin]

When: The National Weather Service will be conducting a communications Exercise on March 29, 2023, between 11:00 AM and 12:00 Noon.

Where: Mendocino, Humboldt, and Del Norte counties.

How: The exercise will be testing the Emergency Alerting System (EAS) which will have interruptions on TV and Radio Stations, and activation of NOAA Weather Radios, and Tsunami Sirens. The Civil Air Patrol will also fly the coastline testing their public address system.

Why: This exercise is designed to test the Tsunami Warning System to ensure that it works properly during a real tsunami event.

HOW THIS TEST WILL AFFECT YOU: 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, or receive other communication tests in some local jurisdictions. The Wireless Emergency Alert (WEA) system will NOT be activated for this test. 

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Please help us by providing any feedback regarding this test by emailing: ryan.aylward@noaa.gov

When you hear or see the warning test on March 29 between 11:00 a.m. & 12:00 Noon:

  • You do NOT need to take any action
  • Do NOT call 911 or local authorities
  • Do NOT evacuate your home or business


PREPARE: Find out more about preparing for earthquakes, tsunamis, or any other disasters on the North Coast at: https://rctwg.humboldt.edu.

America’s PrepareAthon! https://www.ready.gov/prepareathon

The Great California Shakeout https://www.shakeout.org/california/

and The Tsunami Zone (https://www.TsunamiZone.org) are also great places to get preparedness information for natural hazards.

The test is conducted by the National Weather Service, the California Office of Emergency Services, the Offices of Emergency Services for Del Norte, Humboldt, and Mendocino Counties, and Tribal Governments. For more information, contact: National Weather Service at (707) 443-6484.

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MendoFever Staff
MendoFever Staff
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