The National Weather Service, the California Emergency Management Agency (CalEMA) and the Del Norte, Humboldt and Mendocino Offices of Emergency Services are planning the test, which will take place between 10:15 a.m. And 10:45 a.m. Wednesday.
Although the test is specially targeting Del Norte, Humboldt and Mendocino counties, Lake County residents also may encounter the warnings.
Those who hear or see the warnings don't need to take any action. Don't call 911 or local authorities, and don't evacuate homes and businesses.
The National Weather Service reported that the system test will include interruptions of television and radio stations and activation of the National Oceanic and Atmospheric Administration's (NOAA) weather radios with the public alert feature. Not all cable television stations may be able to participate.
The test will check the Emergency Alert System to ensure it works properly during a real tsunami emergency.
If you are watching television between 10:15 a.m. and 10:45 a.m. on Wednesday morning, expect to see a crawler 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 for any reason, 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 of Humboldt County people may hear the sounding of a tsunami siren, and some schools and communities in Humboldt County may be practicing their evacuation plans during the test.
A survey of this test can be taken online at at www.weather.gov/eureka or by calling 707-443-6484.
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