国家气象局波特兰办公室对华盛顿州南部海岸发布高浪警告：破碎浪高30至35英尺至11月14日中午，偷袭浪威胁周五晚最甚
美国国家气象局波特兰办公室对华盛顿州南部海岸发布高浪警告，覆盖海洋公园、瑟夫赛德与长滩一带；当天早些时候发布的高浪咨询已于下午升级为警告，海岸洪水咨询同时生效至下午4时。
气象局预报，破碎浪高可达 30 至 35 英尺，在海滩、沙丘、防波堤与其他暴露的海岸地点构成危险。
高浪警告自 11 月 13 日下午升级生效，至 11 月 14 日中午结束。海岸洪水咨询于 11 月 13 日中午至下午 4 时生效。
气象局在 11 月 13 日凌晨 12 时 43 分发布的沿海危险信息中表示，偷袭浪威胁为极端级别，周五傍晚与夜间最危险。这类浪可在数分钟较平静的海况之后突然涌上沙滩。
海岸洪水方面，气象局预计低洼地点会出现轻微潮汐漫溢，洪水在易受影响地点可高出地面约 1 英尺。威拉帕湾附近的托克角潮位站周五下午涨潮时水位预计约 11.2 英尺。
National Weather Service Portland Issues High Surf Warning for the South Washington Coast: Breakers of 30 to 35 Feet Through Noon on November 14, With an Extreme Sneaker Wave Threat on Friday Evening
The National Weather Service office in Portland has issued a High Surf Warning for the South Washington Coast, including the Ocean Park, Surfside and Long Beach areas, upgrading the advisory issued earlier in the day; a Coastal Flood Advisory was also in effect until 4 p.m.
Forecasters warn that breaking waves could reach 30 to 35 feet, creating hazardous conditions along beaches, dunes, jetties and other exposed coastal locations.
The High Surf Warning runs through noon on November 14. The Coastal Flood Advisory was in effect from noon to 4 in the afternoon on November 13.
In its coastal hazard message issued at 12:43 in the morning on Friday, the weather service said the sneaker wave threat is extreme, with the greatest danger expected Friday evening and Friday night. Sneaker waves can surge much farther up a beach after several minutes of apparently calmer surf.
For coastal flooding, the weather service expects minor tidal overflow in low lying locations, with floodwater potentially about one foot above ground level in susceptible locations. The Toke Point tide gauge near Willapa Bay is forecast to reach approximately 11.2 feet during Friday afternoon high tide.
来源：国家气象局波特兰办公室
发布：GSM·美国（发布链接）
图片来源：图：华盛顿州南部海岸失望角一带的大浪。作者与授权：维基共享资源，CC BY-SA 4.0。 / Photo: Large waves at Cape Disappointment on the south Washington coast. Credit: via Wikimedia Commons, CC BY-SA 4.0.
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