typhoon surge warning

基本解釋

For all the strong Typhoon and storm surge, the actural water level in Shanghai area did not exceed the warning level because of astronomic low tide.
這次臺(tái)風(fēng)過(guò)程未對(duì)上海市沿海造成超過(guò)警戒水位的原因是當(dāng)臺(tái)風(fēng)位置處于有利于產(chǎn)生極大增水時(shí)，上海市沿海恰逢天文小潮汛（出現(xiàn)在低潮時(shí)）；
Warning tidal level is the index of coastal water level, which issued for the preparation of the surge caused by typhoon when the coastal water level reaches the certain height.
防潮警戒水位是指沿海地區(qū)發(fā)生風(fēng)暴潮，當(dāng)?shù)爻蔽贿_(dá)到某一潮高時(shí)，須開(kāi)始警戒并防備潮災(zāi)發(fā)生的指標(biāo)水位值。