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From North Carolina’s Weather Authority on FB: 🌀 Tropical Storm Isaias Update: Tropical Storm Isaias is strengthening over the Gulf this afternoon and is forecast to become a Hurricane on Thursday, and it looks like it will. It remains about 520 Miles SSW of the mouth of the Mississippi River; it'll bring significant impacts to parts of Mississippi, Alabama, the Florida Panhandle, and the Eastern Louisiana Coast. These areas should be preparing for a hurricane. A Storm Surge Watch is in effect from the mouth of the Mississippi River to Yankeetown. A Hurricane Watch is in effect for Bay St. Louis to Indian Pass.
📌North Carolina impacts? The center will not move directly over NC, but as the system moves northward, it'll interact with a frontal system, which will bring indirect outbands and impacts from Isaias to NC. I know there is a lot of concern and a lot of PTSD; this is not a repeat of Helene by any means at all. Let's talk about it; I know everyone has plans outside it appears this weekend. I don't expect an all-weekend washout at all. Thursday and Friday will be very nice, no weather impacts.
The wildcards are Saturday and Sunday, and timing remains really all over the place, and I'm not committing to rainfall amounts right now either. Right now, it looks like rain chances are hit or miss, and bands will move in on Saturday from south to north, becoming more numerous by the afternoon and into the overnight Saturday. Rainfall amounts: It'll be bands and not even, but some spots will pick up 1-3 inches; the higher odds right now look to be in Eastern/Coastal NC and parts of the mountains. We could see if some higher bands set up some localized flooding that looks to be in the Blue Ridge Escarpment and maybe Eastern NC. However, the situation is fluid, so stay tuned as we fine-tune the amounts.
There could be some gusty winds Saturday into Sunday 25-35MPH statewide from the low level jet above with some locally higher gusts in the higher terrains of the mountains; can't rule out some isolated to scattered power outages in the mountains.
There could be a low/spotty tornado threat Sunday, but that is fluid, and we are not sure about that yet. Will know more in the next 48 hours.
The Bottom Line: The world is not ending in NC; don't fall for hype trying to scare you. We will have scattered, hit-or-miss rain chances this weekend; it won't be a nice, sunny weekend, but it also won't be a complete washout. The greatest period for showers, hit or miss, looks to be Saturday PM into Sunday midday, becoming more isolated Sunday afternoon. The Flash Flooding threat is overall low, but given we're still 36 hours out it could ramp up some or ramp down, so stay aware for some localized stuff, especially along the Blue Ridge Escarpment, and mainly isolated chance along the coast. We will check back on the Tornado threat; it'll be just fine. I'll hopefully be able to give you even more weekend thoughts over the next 24 hours, as more data is just being fed into the models from recon planes. There is no reason to say something now and change it 100 times. I'll keep you posted.
-Ethan