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Coastal Low Expected to bring significant impacts to parts of North Carolina.

COASTAL LOW/NOR'EASTER UPDATE: Confidence continues to increase that a Coastal Low will impact parts of North Carolina this weekend, especially Eastern and Coastal North Carolina. The odds of significant impacts are increasing (especially from Coastal Flooding Storm Surge) along the Outer Banks and other parts of the coast. Here's my latest update and thoughts, along with a full breakdown of potential impacts as they stand right now.


📌A cold front is passing through the state now, which will bring cooler weather for the rest of the week. This same cold front will stall off the coast, and an area of low pressure could develop along the front, setting the stage for a long-duration coastal low. Exactly where the low travels is still up for debate, but there is a significant risk of coastal flooding along the Outer Banks (especially south of Oregon Inlet) at this point. Exactly where the low travels is still being determined, but based on the latest data, I've identified the impacts that I think will occur.


📌 Would it be tropical in nature? It could be, but this setup favors more of a subtropical low or just a generic coastal low/nor'easter setup. Regardless of whether named or not, it will likely have the same impact on parts of North Carolina and the greater Eastern Seaboard.


🌊 Graphic 1/2: (COASTAL FLOODING "STORM SURGE")

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A Coastal Flood Watch has been issued by the National Weather Service starting Thursday morning through Monday morning for all of the Outer Banks south of Oregon Inlet (Hatteras and Ocracoke Islands) NE Winds will start to pick on Thursday and continue to increase through the weekend moderate to major impacts are possible along the Outer Banks from Coastal Flooding.


Looking at the latest data, the most concerning time for Coastal Flooding will be Thursday into Monday night during high tides and with the greatest risk along the Outer Banks, especially Hatteras and Ocracoke Islands. East and South Facing Beaches will be the most concerned. If you're on Ocracoke and Hatteras Island and need to leave I would leave before the weekend because travel along Highway 12 could be quite hard Friday, Saturday, Sunday, and Monday, especially in the prone areas of Ocracoke, Hatteras, Buxton, Avon, Rodanthe, Waves, and Oregon Inlet. Basically, Oregon Inlet south has the greatest risk in my opinion. This is the expected to be a prolonged event starting Thursday-Monday morning. Ferries will likely be impacted on the Outer Banks.


The National Weather Service says: "Up to 2 to 4 feet of inundation above ground level is possible in some areas near shorelines and tidal waterways resulting in an elevated threat of property damage around the times of high tide. Flooding will extend inland from the waterfront threatening some homes and businesses. Numerous road closures and flooding of vehicles will be possible, most notably along NC 12 where ocean overwash may make several portions of the highway inaccessible across Ocracoke and Hatteras Islands."


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Graphic 2: Southern Coastal Areas: Minor to Moderate Coastal Flooding is possible across the beaches of Brunswick, New Hanover, Pender, Onslow, and Carteret Counties, Friday to Sunday, with some vulnerable areas experiencing Coastal Flooding. Roads near the coast in vulnerable areas can flood during High tides, and beach erosion is likely due to high surf and rip currents.


💨 WIND GRAPHIC 3: I've had a lot of questions about the wind gusts. We will likely see some gusty winds. As the cold front passes through, gusty winds are likely statewide on Thursday and Friday, but they are not expected to be particularly high. The primary concern for winds will be Saturday-Monday, mainly along the coast. The wind forecast remains highly fluid and subject to change, but my current map is a good starting point.


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35-45MPH (RED) Wind Gusts are possible across Eastern NC areas and the Southeastern Coastline. This could blow around light outdoor objects, trash cans, patio furniture, and Halloween decorations. There could be a couple of localized power outages, but nothing too concerning. Winds to this strength are nothing we can't handle.


45-60MPH (DARK RED) Wind Gusts will be stronger on the Outer Banks thanks to being closer to the low, so 45-60MPH wind gusts are possible Saturday-Monday mainly. Loose outdoor objects (trash bins, signs, furniture, flags, Halloween decor) can become airborne and cause minor damage. High-profile vehicles (box trucks, RVs, trailers) can be difficult to control on bridges. There could be some scattered power outages from this.


20-35MPH: Inland areas across Central NC, it'll be breezy, but at this point, nothing concerning.


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🌧️ RAIN: We will see some rainfall out of this low-pressure system, but amounts still don't look all that high. Saturday, inland areas are expected to remain dry, but the best chance of rain at this point is from Saturday night into Monday morning across Central and Eastern North Carolina. We're still working to figure out exact timing, but rain is possible at any point this weekend along the coast and lower chances inland. The heaviest rainfall is expected to fall along the coast, where 4-6 inches are possible along the Outer Banks, with 2-4 inches possible across the southern coastline. Inland areas rain amounts will fall off quickly and are still highly subject to track changes. There could be some localized flooding in some spots, but thanks to the drier weather recently, I am not expecting too many problems from freshwater.


Soundside/River/Creek Flooding Potential in Pamlico and Southern Craven Counties:I've gotten a lot of questions regarding potential flooding across parts of the tide areas of the Pamlico Sound, Trent Bay, lower Neuse River, and surrounding tidal creeks. This area has experienced severe flooding in the past; thankfully, I don't expect anything significant. However, some minor flooding of 1-3 feet above ground level in spots will be possible mainly Wednesday night through Thursday for these areas. There could be a couple of flooded roads, lots, and parks in this area. Hopefully this helps, I know people are nervous in this area from previous experience.

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😎 Bottom Line: A long-duration coastal low is increasingly likely to impact Eastern and Coastal North Carolina this weekend, especially the Outer Banks. Moderate to major coastal flooding is possible south of Oregon Inlet, with travel disruptions likely along Highway 12 from Thursday through Monday. Gusty winds (45–60 MPH) may bring scattered power outages and beach erosion, while heavy surf and rip currents will persist through the weekend. Rainfall totals of 4–6 inches are possible on the Outer Banks, with lighter amounts inland depending on the storm’s track. While inland NC sees breezy weather and some rain, the greatest threats remain along the coast, especially for those with vulnerable property or weekend travel plans. No worries for Western North Carolina. The forecast is still fluid, so this is subject to change some. Forecasting weather is a science, so I am using all the available data and my past experiences to provide you with the best forecast. We still have 48-72 hours, so thing will change. I am watching and will be providing updates as needed.


-Ethan

 
 
 

1 Comment


Guest
4 days ago

thanks for your level-headed forecasts - you help a lot of us figure out what's really going on without the hype and drama on the local news stations

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