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强大的飓风艾达袭击了美国路易斯安那州和其他地区

2021-8-30 11:20

 

8月29日,在美国路易斯安那州新奥尔良市,一家餐馆的门窗被封上,以应对飓风“艾达”。美国气象频道报道,危险的4级飓风“艾达”周日在美国南部路易斯安那州格兰德岛以西登陆,风速为每小时150英里。(新华社兰薇摄)


休斯敦,8月29日(新华社电)——危险的四级飓风艾达周日在美国南部路易斯安那州格兰德岛以西登陆,最大持续风速为每小时150英里(约240公里),带来了危及生命的风暴潮,灾难性的大风和危险的降雨洪水。


美国气象频道说,艾达的中心在美国东部时间上午11:55越过了路易斯安那州Fourchon港附近的海岸。Fourchon港位于新奥尔良以南不到100英里处。


根据追踪网站poweroutage.us的数据,数小时后,该州近30.2万户家庭和企业断电。


“这将是可怕的一天。美国国家气象局气象学家本杰明·肖特在风暴登陆前不久说:“我认为,我们认为风暴可能做的所有最糟糕的事情都即将发生。”


路易斯安那州州长约翰·贝尔·爱德华兹(John Bel Edwards)在周日下午的吹风会上说,“艾达”是“现代登陆这里的最强风暴之一,它在登陆前以前所未有的速度迅速增强。”


州长说,路易斯安那州国民警卫队已经全部启动,目前超过4900名警卫在14个教区部署,并补充说,该州的飓风保护系统内的所有结构目前都在全面运行。


据预报,艾达可能会给新奥尔良带来多达20英寸的降雨。市政官员敦促那些没有撤离的居民保持庇护,直到城市可能在周一上午评估损失。


新奥尔良紧急事务管理服务中心星期天在推特上说,由于飓风艾达,他们暂停了所有行动。


市长拉托亚·坎特雷尔(LaToya Cantrell)说:“在这场风暴中保持冷静。”“我们会一起度过难关的。”


据《今日美国》报道,美国新奥尔良市在16年前遭受卡特里娜飓风袭击后,斥资140亿美元升级防洪系统。


然而,面对艾达的威胁,城市副行政官员拉姆齐·格林警告说:“这是一个难以置信的脆弱系统。这个体系随时都可能改变。”


美国国家气象局发布极端大风警告,路易斯安那州东南部地区将至少持续到美国东部时间下午1:30。这意味着当艾达的眼壁接近时,这一地区的风速可能达到每小时115到150英里。


伴随强风的强降雨带正在向墨西哥湾北部海岸扩散,远至佛罗里达州的狭长地带。


监管机构周日表示,由于飓风“艾达”,墨西哥湾95%以上的石油生产已经关闭。美国能源中心之一的石油供应普遍减少可能会推高油价。


美国安全与环境执法局(Bureau of Safety and Environmental Enforcement)表示,截至周日上午11:30,共有288个油气生产平台的工作人员被疏散。据美国有线电视新闻网报道,这一数字约占墨西哥湾人工钻井平台的51%。


“艾达”减弱为热带风暴,然后在本周早些时候通过密西西比河下游和田纳西山谷向内陆移动,预计将形成热带低气压。据报道,周日上午密西西比州部分地区已经发生洪水。


“艾达”在数小时内成长为4级风暴。根据科罗拉多州立大学气象学家菲尔·克劳茨巴赫的说法,所谓的“快速增强”通常被定义为热带气旋在24小时内至少以每小时35英里的速度增强。当风暴遇到非常有利的环境时,比如非常温暖的海水、低垂直风切变和高水平的中层水汽,就会发生这种情况。


根据最大风速,“艾达”与另外两场飓风并列路易斯安那州有记录以来最强的登陆。

 

Doors and windows of a restaurant are seen sealed in preparation for Hurricane Ida in New Orleans, Louisiana, the United States, on Aug. 29, 2021. Dangerous Category 4 Hurricane Ida on Sunday made landfall with 150-mph winds just west of Grand Isle, southern U.S. state Louisiana, the U.S. weather channel said. (Photo by Lan Wei/Xinhua)

HOUSTON, Aug. 29 (Xinhua) -- Dangerous high-end category 4 Hurricane Ida on Sunday made landfall with maximum sustained winds of 150 miles (about 240 km) per hour just west of Grand Isle, southern U.S. state Louisiana, bringing life-threatening storm surge, catastrophic winds and dangerous rainfall flooding.

The U.S. weather channel said Ida's center crossed the coast near Port Fourchon, Louisiana, at 11:55 a.m. CDT. Port Fourchon is less than 100 miles south of New Orleans.

Hours later, power was out to nearly 302,000 homes and businesses in the state, according to the tracking website poweroutage.us.

"It's going to be a horrible day. All of the worst things we thought the storm could do I think are about to happen," National Weather Service Meteorologist Benjamin Schott said shortly before the landfall.

Louisiana Governor John Bel Edwards said at a briefing Sunday afternoon that Ida is "one of the strongest storms to make landfall here in modern times, as it rapidly intensified at an unprecedented rate, right up until landfall."

The entirety of the Louisiana National Guard has been activated and currently more than 4,900 guardsmen are staged across 14 parishes, the governor said, adding that all of the structures within the state's Hurricane Protection Systems are fully operational currently.

Ida could dump up to 20 inches of rain on New Orleans, it was forecast. City officials urged residents who did not evacuate to remain sheltered until the city can assess damage, likely Monday morning.

New Orleans Emergency Management Services tweeted Sunday it has suspended all operations due to Hurricane Ida.

"Be calm in this midst of this storm," Mayor LaToya Cantrell said. "We will get through this together."

New Orleans has spent 14 billion U.S. dollars to upgrade its flood protection system after suffering from Hurricane Katrina 16 years ago, according to a USA Today report.

However, facing the threat of Ida, Deputy City Administrator Officer Ramsey Green has warned that "it's an incredibly fragile system. That system can change at any point."

The National Weather Service has issued an extreme wind warning for far southeast Louisiana until at least 1:30 p.m. CDT. This means winds of 115 to 150 mph are possible in this area as the eyewall of Ida approaches.

Bands of heavy rain containing strong wind gusts are spreading into the northern Gulf Coast as far east as the Florida Panhandle.

More than 95 percent of the Gulf of Mexico's oil production has been shut down due to Hurricane Ida, regulators said Sunday. The widespread loss of oil supply from one of U.S. energy hubs is likely to lift prices.

As of 11:30 a.m. CT on Sunday, personnel have been evacuated from a total of 288 oil-and-gas production platforms, according to the Bureau of Safety and Environmental Enforcement. The figure represents about 51 percent of the manned platforms in the Gulf of Mexico, said a CNN report.

Weakening of Ida to a tropical storm and then a tropical depression is expected as it tracks inland through the lower Mississippi and Tennessee valleys early this week. Flooding was reportedly already underway in parts of Mississippi on Sunday morning.

Ida grew into a Category 4 storm within hours. The so-called "rapid intensification" is typically defined to be a tropical cyclone intensifying by at least 35 mph in a 24-hour period, according to Colorado State University meteorologist Phil Klotzbach. That can happen when a storm encounters an extremely conducive environment such as very warm water, low vertical wind shear and high levels of mid-level moisture.

Ida has tied two other hurricanes for the strongest landfall on record in Louisiana based on maximum wind speeds.

 

来自: xinhua