Conditions deteriorate in Northeast as rare September nor’easter digs in

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• Rare storm: A strong early season nor’easter has arrived in the Northeast and is delivering a prolonged stretch of strong wind, soaking rain and coastal flooding to the region through the weekend.

• Power outages incoming: Wind picked up across the region late yesterday and will peak through Saturday night. Gusts could top out at 50 mph for the New York City metro area and 60 mph near Boston — strong enough to topple trees and knock down power lines.

• Battered shorelines: Tides are rising around Saturday’s full moon, worsening coastal flooding. Areas close to the water in New Jersey and the New York City area could see up to 3 feet of inundation. New York City Mayor Zohran Mamdani issued a travel advisory due to flooding concerns.

• Latest on cancellations: Ed Sheeran’s Massachusetts concerts are among the shows canceled this weekend due to the weather. Major airlines, including American , United , Southwest , JetBlue and Delta , have waived change fees for certain flights through northeastern airports, citing the storm.

Meteorologist Derek Van Dam reports as the nor’easter’s wave action sweeps against seawalls in Scituate, Massachusetts.

Video shows waves surging across cracked North Carolina Highway 12 after ocean water spilled over protective sand dunes in the Outer Banks as a nor'easter starts to batter the Mid-Atlantic coast. The storm has brought coastal flooding from North Carolina to New Jersey since Wednesday, with conditions expected to worsen through the weekend as wind gusts reach up to 60 mph and some areas see up to 5 inches of rain.

What is a nor’easter?

A nor’easter is a storm that moves along the US East Coast and produces winds from the northeast – hence the name – over land. These storms are driven by the temperature contrast between cool, dry land and warm, moist ocean offshore waters heated by the Gulf Stream, a strong ocean current that transports warm water north from the Gulf into the Atlantic Ocean.

Nor’easters typically form between Georgia and New Jersey within 100 miles east or west of the East Coast, according to the National Oceanic and Atmospheric Administration .

They are most common between the months of September and April but can happen at any time of the year. While nor’easters are not unusual in September, a storm of this intensity is more typical in the winter than in early fall.

Airlines waive change fees for flights to and from Northeast airports

American , United , Delta , Southwest and JetBlue are waiving change fees to various Northeast airports based on the forecast weather conditions for the region over the weekend.

Major airports included in the waiver are Boston Logan International Airport and New York’s LaGuardia Airport, among others.

Passengers should check their airline’s website or app for specific details and restrictions.

A long-duration nor’easter is lashing the Northeast with powerful winds, soaking rain and significant coastal flooding.

Wind gusts between 50 to 60 mph have been clocked since Friday night from southeast Massachusetts to Long Island, New York, and the New Jersey coast. A few spots in New Jersey saw peak gusts reach around 70 mph.

The storm will deliver its worst impacts from now through Sunday morning. Rain and breezy conditions will continue late Sunday and Monday in some areas, but the storm will be past its peak by then.

Boston, New York City, Philadelphia and Atlantic City, New Jersey, are a few of the cities that are in for a wet and windy weekend.

Read the forecasts below for a more comprehensive breakdown of each threat and when they are expected to be most hazardous for your area.

Confidence: We are confident the Northeast will experience a long-duration nor’easter with coastal flooding, strong winds and periods of heavy rain.

Long-lasting strong winds will pound the East Coast through the weekend and continue to cause widespread coastal flooding. The longevity and strength of these winds could also cause power outages.

Gusts between 50 to 60 mph will blast the coast from southern New England and Long Island to New Jersey into Sunday morning.

New York City will see gusts of 40 to 50 mph while Philadelphia and other parts of southeast Pennsylvania could see gusts of 35 to 45 mph during the same timeframe.

These gusts are all strong enough to topple trees, especially because trees that are full of leaves are more prone to fall in high winds. Any downed trees could damage power lines, homes or property.

Coastal flood threats

Coastal flooding is ongoing along the East Coast during high tides, and it’s being enhanced by higher than normal tides from Saturday’s full moon.

Ocean water is inundating low-lying areas, including roads and vulnerable properties. Road flooding can happen even at minor flood levels.

Coastal areas from North Carolina through most of New Jersey will deal with major flooding at high tides on Saturday. New Jersey’s worst high tide will come Saturday morning.

Major flooding has already occurred at high tides this week in North Carolina and Virginia. In areas where additional major flooding is expected, indicated in dark blue below, there could be widespread road flooding and water entering homes and businesses.

Rain totals and flood threats

Enough rain will fall to cause some flooding issues in the Northeast, even in areas not impacted by coastal flooding. The risk is highest in urban or low-lying areas from southern New England through New York City to New Jersey.

Portions of eastern Massachusetts and Rhode Island could see 2 to 4 inches of rain this weekend, with the hardest hit areas seeing up to 5 inches — more than a month’s worth. The heaviest rain will fall Saturday into Sunday.

New York City could also record more than 3 inches of rain. The city may struggle to drain any floodwater with coastal water levels forecast to rise much higher than normal.

Around 2 to 4 inches of rain are also possible in New Jersey while parts of eastern Pennsylvania could see 1 to 2 inches Saturday into Sunday.

Tomorrow’s forecast:

🌊 ⛈️ 在 CNN 天气应用程序中追踪风暴，查看您所在地区的风险，并获取气象学家提供的更详细的时间信息

• 罕见风暴：一股强劲的早季东北风暴已抵达美国东北部，并将持续给该地区带来强风、暴雨和沿海洪水，这种情况将持续到周末。

• 预计停电：昨日晚些时候，该地区风力增强，并将持续到周六晚间。纽约市都会区阵风风速可能达到每小时 50 英里，波士顿附近阵风风速可能达到每小时 60 英里——足以吹倒树木和刮断电线。

• 海岸线遭受重创：周六满月前后，潮水上涨，加剧了沿海洪灾。新泽西州和纽约市附近水域可能出现高达3英尺（约90厘米）的洪水。纽约市市长佐兰·马姆达尼已发布旅行警告，提醒民众注意洪水风险。

• 最新演出取消消息：由于天气原因，艾德·希兰在马萨诸塞州的演唱会也于本周末取消。包括美国航空、联合航空、西南航空、捷蓝航空和达美航空在内的多家主要航空公司，已宣布免除部分经东北部机场转机航班的改签费，理由是受暴风雪影响。

气象学家德里克·范·达姆报道，东北风暴的巨浪正席卷马萨诸塞州斯基图特的海堤。

视频显示，随着东北风暴开始袭击大西洋中部沿岸地区，海水漫过外滩群岛的沙丘，涌上北卡罗来纳州12号公路，导致路面出现裂​​缝。这场风暴自周三以来已给从北卡罗来纳州到新泽西州的沿海地区带来洪水，预计周末情况将进一步恶化，阵风风速将高达每小时60英里，部分地区降雨量将达到5英寸。

什么是东北风暴？

东北风暴是指沿着美国东海岸移动，并向陆地吹东北风的风暴——因此得名。这类风暴的形成是由于陆地寒冷干燥，而近海温暖潮湿的海水则受到墨西哥湾暖流的加热。墨西哥湾暖流是一股强劲的洋流，它将墨西哥湾的暖水向北输送到大西洋。

根据美国国家海洋和大气管理局的说法，东北风暴通常在佐治亚州和新泽西州之间形成，位于东海岸以东或以西 100 英里范围内。

东北风暴最常发生于9月至次年4月，但一年中的任何时候都可能发生。虽然9月份出现东北风暴并不罕见，但这种强度的风暴在冬季比初秋更为常见。

航空公司免除往返美国东北部机场航班的改签费

根据周末该地区的天气预报，美国航空、联合航空、达美航空、西南航空和捷蓝航空将免除飞往东北部各机场的改签费。

此次豁免涵盖的主要机场包括波士顿洛根国际机场和纽约拉瓜迪亚机场等。

乘客应查看航空公司网站或应用程序了解具体详情和限制。

一场持续时间较长的东北风暴正席卷美国东北部，带来强风、暴雨和严重的沿海洪水。

自周五晚间以来，从马萨诸塞州东南部到纽约长岛以及新泽西州沿海地区，都记录到了时速50至60英里的阵风。新泽西州部分地区的阵风峰值甚至达到了70英里左右。

从现在到周日早上，风暴将带来最严重的灾害。周日晚些时候和周一，部分地区仍将有降雨和大风天气，但届时风暴强度将达到顶峰。

波士顿、纽约市、费城和新泽西州大西洋城等城市将迎来一个多雨多风的周末。

请阅读以下预测，以更全面地了解每项威胁及其预计对您所在地区造成最大危害的时间。

信心：我们有信心，东北地区将遭遇持续时间较长的东北风暴，伴有沿海洪水、强风和持续强降雨。

持续强风将席卷美国东海岸，并持续引发大范围沿海洪灾。强风持续时间长、强度大，还可能导致停电。

周日早上，从新英格兰南部和长岛到新泽西州的沿海地区将出现时速 50 至 60 英里的阵风。

纽约市将出现每小时 40 至 50 英里的阵风，而费城和宾夕法尼亚州东南部其他地区在同一时间段内可能会出现每小时 35 至 45 英里的阵风。

这些阵风都足以吹倒树木，尤其是枝繁叶茂的树木更容易在大风中倒塌。任何倒下的树木都可能损坏电线、房屋或财产。

沿海洪水威胁

东海岸在高潮期间持续发生沿海洪水，而周六的满月带来的比正常情况更高的潮位加剧了洪水灾害。

海水淹没了低洼地区，包括道路和易受灾房屋。即使是轻微的洪水水位，也可能导致道路被淹。

从北卡罗来纳州到新泽西州大部分沿海地区，周六涨潮时将面临严重洪灾。新泽西州最严重的涨潮将出现在周六上午。

本周北卡罗来纳州和弗吉尼亚州已因涨潮发生严重洪灾。预计在以下深蓝色区域还会发生更多严重洪灾，届时可能出现大范围道路积水，房屋和商铺进水。

降雨总量和洪水威胁

东北部地区降雨量足以引发部分地区发生洪涝灾害，即使是那些未受沿海洪灾影响的地区也不例外。从新英格兰南部经纽约市到新泽西州，城市或低洼地区面临的风险最高。

本周末，马萨诸塞州东部和罗德岛州部分地区可能迎来2至4英寸的降雨，其中受灾最严重的地区降雨量可能高达5英寸——超过一个月的降雨量。降雨量最大的时期将持续到周六至周日。

纽约市的降雨量也可能超过3英寸。由于预计沿海水位将远高于正常水平，该市可能难以排出洪水。

新泽西州也可能出现 2 至 4 英寸的降雨，而宾夕法尼亚州东部部分地区周六至周日可能会出现 1 至 2 英寸的降雨。

明日天气预报：