跟进：圣约翰河Cocoa河段洪水预报升至重大级别：Astor水位3.3英尺维持中度洪水

美国国家气象局（National Weather Service）Melbourne 办公室11月4日上午更新洪水警报：位于佛罗里达州布里瓦德县 Cocoa 以西约9英里的圣约翰河（St. Johns River）河段，洪水级别由中度上调为重大——目前为中度洪水，预计本周晚些时候升至重大洪水阶段并持续至周末，警报持续至另行通知。

气象局数据显示，Cocoa 河段11月4日上午8时15分水位为16.7英尺，已高于16.0英尺的洪水位与15.8英尺的满岸水位。预报称水位将继续攀升、本周晚些时候达到重大洪水阶段；水位达17.0英尺时，Rockledge 的 Silver Pines 社区部分道路将被淹、低洼住宅进水风险上升，Cocoa 与 Rockledge 沿 Pluckebaum Road 一带的院落、沟渠与牧场被淹，Melbourne 的 Lake Washington 地区低洼建筑也将受影响。

同一流域其他河段也在上涨。Astor 河段（Lake 县与 Volusia 县）上午9时30分水位3.3英尺、高于2.3英尺洪水位，维持中度洪水，预计先小幅回落、周末再度上涨；当地运河已漫入院落，Wildhog Road 与 Bonnet Road 一带住宅进出受阻，Astor Bridge 码头与多处道路被淹。Lake Harney 上游河段（Seminole 县）水位8.5英尺，预报下周一上午升至9.8英尺、由轻度转中度洪水，周末晚些时候不排除接近重大级别。Sanford 河段（Seminole 县）水位5.1英尺，预报明日下午进入轻度洪水、下周一上午升至6.4英尺；DeLand 河段（Lake 县与 Volusia 县）水位4.0英尺，预报周日晚升至4.7英尺、维持轻度洪水并可能接近中度。

气象局提醒，驾驶人不要绕过路障、不要驾车驶入被淹路段，在河岸附近行走时也要格外小心，下一份声明将于当晚发布。

前情：佛罗里达州多地自11月初持续强降雨引发内涝，本站11月2日曾报道全州多地处于洪水预警与警报之下、部分地区进入紧急状态，11月3日跟进报道7县25处投票站因洪水改址。本篇为同一洪水事件的河段水位新进展。

（来源：美国国家气象局）

Follow-Up: Major Flooding Forecast for St. Johns River Near Cocoa as Astor Stays at Moderate Flood Stage

The National Weather Service office in Melbourne, Florida, updated its flood warnings on the morning of November 4: for the St. Johns River near Cocoa, about nine miles west of Cocoa in Brevard County, Florida, the forecast flooding was changed from moderate to major severity. Moderate flooding is occurring, major flooding is forecast by late this week, and the river is expected to remain at major flood stage into the weekend, with the warning in effect until further notice.

The river near Cocoa was at 16.7 feet at 8:15 a.m. EST on November 4, above the 16.0-foot flood stage and the 15.8-foot bankfull stage, and is forecast to keep climbing through moderate flood stage to major flood stage late in the week. At 17.0 feet, some roads in the Silver Pines subdivision in Rockledge would flood and water would approach low-lying homes, with yards, ditches and pastures flooded along Pluckebaum Road in Cocoa and Rockledge and flooding of low-lying structures in the Lake Washington area of Melbourne.

Other reaches of the river are also rising. Near Astor, affecting Lake and Volusia counties, the stage was 3.3 feet at 9:30 a.m., above the 2.3-foot flood stage, with moderate flooding occurring and forecast to continue through the weekend after a gradual decline over the next couple of days; canals have overflowed into yards, homes on or near Wildhog and Bonnet roads have become inaccessible, and docks at Astor Bridge marina are completely submerged. Above Lake Harney in Seminole County, the stage was 8.5 feet and is forecast to rise to 9.8 feet by Monday morning, climbing from minor to moderate flooding, with rises near major flood stage possible late this weekend. Near Sanford, also in Seminole County, the stage was 5.1 feet and is forecast to reach minor flood stage tomorrow afternoon and rise to 6.4 feet by Monday morning, while near DeLand, affecting Lake and Volusia counties, the stage was 4.0 feet and is forecast to rise to 4.7 feet by Sunday evening at minor flood stage, potentially nearing moderate stage thereafter.

The Weather Service urged motorists not to drive around barricades or through flooded areas and urged caution when walking near riverbanks, with the next statement due that evening.

Earlier in this event, GSM reported on November 2 that much of Florida was under flood watches and warnings with some areas in a state of emergency after record rainfall, and on November 3 that 25 polling places in seven counties had been relocated because of flooding. This story reports the new river-stage developments in the same flooding event.

(Source: National Weather Service)

来源：美国国家气象局

发布：GSM·美国（发布链接）

图片来源：图：佛罗里达州 Astor 的圣约翰河（资料图）。摄影 Ebyabe，CC BY-SA 3.0，经 Wikimedia Commons。 / Photo: The St. Johns River at Astor, Florida (file photo). By Ebyabe, CC BY-SA 3.0, via Wikimedia Commons.

GSM Global · 本篇英文版 English edition of this story

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