tsunami advisory
Official warning issued when a tsunami is expected, but with lower expected wave heights than a tsunami warning (大津波警報 or 津波警報).
After the earthquake, the meteorological agency issued a tsunami advisory.
津波警報 is the urgent 'tsunami warning' level, while 津波注意報 is the milder 'tsunami advisory' issued for smaller expected waves.
Compound of 津波 (tsunami) and 注意報 (advisory/warning).