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Office: SEW NOUS46 KSEW 151802 PNSSEW Public Information Statement National Weather Service Seattle WA 1100 AM PDT Mon Oct 15 2018 ...The Great ShakeOut and Tsunami Warning Communications Test - Thursday October 18... On Thursday October 18, 2018 at 1018 AM PDT, the National Tsunami Warning Center (NTWC) and the NWS Weather Forecast Offices in Seattle and Portland, Oregon, will conduct a tsunami warning communications test. This test is in support of the Great Washington ShakeOut statewide earthquake drill with state and local emergency management officials, part of a global earthquake preparedness effort. Millions of people worldwide will practice how to drop, cover and hold on at about 1018 AM PDT on October 18th during the Great ShakeOut. Washingtonians can join them by registering for the 2018 Great Washington ShakeOut. Participation is a great way for your family or organization to be better prepared to survive and recover quickly from big earthquakes. Over one million people in Washington are expected to participate. Pre-register today at . National Weather Service Offices across the state will disseminate a Required Monthly Test (RMT) message via the 22 NOAA Weather Radio stations that serve the state to activate the Emergency Alert System (EAS) and help kickoff the Great ShakeOut drill. Broadcasters will carry the EAS message to help reach more of the state's citizens, along with those who have all-hazard weather radio receivers. In coastal areas, the Great ShakeOut earthquake drill will also include the tsunami warning communications test. The purpose of the test is to evaluate communications for use in the dissemination of tsunami warnings, watches and advisories. For the first time, all 72 Washington tsunami alert sirens will be tested at 1018 AM using the real sound of the siren, not the Westminster Chimes that typically happen during the monthly tests. If you have any questions or comments, please contact NWS Seattle Warning Coordination Meteorologist Reid Wolcott at 206-526-6095 x223. #ShakeOut $$