Tag: coastal flooding

Rest of the work week: Comfortably warm and rain-free

/ November 1, 2022 at 9:11 PM

The weather will be generally quiet and comfortably warm for the rest of the work week, with temperatures running at or above normal for the foreseeable future as ridging develops in the Southeast. Northeasterly winds will keep temperatures generally in the mid-to-upper 70s each afternoon. Dewpoints in the 50s will generally be comfortable, though we should see those begin to creep back into the 60s starting Friday afternoon as moisture return inches up for the weekend.

The only hazard we’ll be watching for heading toward the weekend is the risk for minor coastal flooding with the afternoon and evening high tides, particularly Thursday and Friday, as persistent northeasterly wind and the approaching full moon (Nov 8) will combine to drive water levels over 7′. We could see evening high tides approaching moderate flood threshold by the weekend, so stay tuned for forecast updates.

Weekend forecast: A few showers at times but no washout; coastal flood risk continues

/ October 28, 2022 at 10:47 PM

The weekend forecast will generally run on the cool side, particularly on Saturday, with a few showers possible at times. High pressure remains wedged into the area, and moisture trapped beneath the wedge inversion aloft will keep cloud cover and a few light showers in the forecast. Much like Friday, highs will likely not exceed 70° with the lack of insolation and cool northeasterly winds continuing to reinforce the wedge.

We should see a little bit more sunshine — and a little more warmth as a result — on Sunday as the wedge begins to erode. Still, a few showers will be possible at times, and one should not 100% trust the wedge to erode when it is supposed to.

Overall, you’ll want to have a hoodie or light jacket both days, and be ready to evade a few light showers, but it won’t be enough to cause major problems.

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Friday & the weekend: Seasonably cool under the wedge

/ October 27, 2022 at 9:55 PM

High pressure wedging into the area will keep clouds and cool temperatures around for Friday into the weekend. Temperatures shouldn’t get out of the 60s on Friday with a steady northeasterly breeze and mostly cloudy skies thanks to a thin layer of moisture being lifted atop the wedge. We could see a couple more breaks in the clouds on Saturday — along with a shower or two — as highs should creep above 70°. (Beware the wedge and its uncanny ability to bust temperature forecasts, though.) A warm front will sharpen and lift through the area on Sunday ahead of a cold front on Monday; this will help highs recover to the mid-70s in the afternoon. Moisture remains very shallow, but a shower or two can’t be totally ruled out in the evening hours.

The main weather hazard will continue to be coastal flooding thanks to continued astronomical influences from the lunar perigee and northeasterly winds. Friday morning’s high tide is expected to peak between 7.6-7.8′ in the harbor around 10:37am, which will be high enough to cause scattered road closures in downtown Charleston, particularly around the edges of the peninsula, a few hours on either side of that tide. Similar conditions are expected with Saturday morning’s high tide, forecast to peak a little after 11:30am. Water levels are expected to run a touch lower with the midday Sunday high tide, but should still be plenty high enough to produce minor to moderate coastal flooding, once again likely closing some roads. The good news is that any rain that falls won’t be very heavy at all, and won’t be enough to exacerbate any ongoing flooding.

Turning cooler Thursday through the weekend

/ October 26, 2022 at 9:48 PM

A cold front is on its way through this evening, which will bring cooler temperatures for Thursday and beyond after highs peaked in the low 80s this afternoon away from the locally cooler coastline. Winds will go to the north and then the northeast overnight as high pressure builds in from the north and west. We’ll generally see scattered clouds throughout the day with those northeast winds keeping us about 5-7° cooler than we saw Wednesday. The aforementioned northeasterly winds and upcoming lunar perigee will contribute to another risk for minor to moderate coastal flooding around the 9:47am high tide, so be aware of the potential for closed roads once again tomorrow morning (though the peak of any tidal flooding should miss the bulk of any commute time at this point).

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Rest of the work week: Unseasonable warmth yields a little by Friday; coastal flooding each morning

/ October 25, 2022 at 9:33 PM

We look to get off to another foggy start Wednesday morning, at least in spots, as temperatures bottom out just shy of 60° in the morning. We may not see quite the density nor the duration that we saw Tuesday morning, but still, be ready to use those low beams and allow extra time to get where you are going. Once any fog burns off, warm advection ahead of a cold front will help temperatures get to near 80° in the afternoon under partly cloudy skies.

The front gets through late Wednesday. It looks like it’ll get through mostly rain-free given limited moisture. Once that happens, winds will go around to the north and northeast and begin to bring some cooler air into the area. The persistent northeast winds will cool things down even further for Friday as highs only top out in the low 70s as cloud cover builds within a strengthening wedge of high pressure.

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Tuesday: A little warmer with some morning coastal flooding

/ October 24, 2022 at 9:26 PM

We’ll continue our warming trend on Tuesday ahead of a weak front that’ll come through later Wednesday. After starting around 50° thanks to clear skies and light winds, we’ll warm well into the upper 70s in the afternoon. We should see mostly sunny skies for a good bit of the day, with some higher clouds beginning to thicken later on. Rain-free conditions continue, and it should overall be another good day of weather across the area.

The only weather hazard of note will be the risk for some minor coastal flooding around the 8:20 AM high tide. Right now, water levels are forecast to peak around 7.1-7.3′ in the harbor, which will be enough to perhaps close a couple of the more vulnerable roads on the Charleston peninsula (such as around Hagood and Fishburne as well as near the City Market).

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The week ahead: Seasonably warm, shower chances this weekend

/ October 23, 2022 at 9:49 PM

Warm weather fans, this will be a little better week for you as temperatures will run closer to, if not slightly above, normal at times.

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Rest of the work week: Showers and a few thunderstorms Wednesday into Thursday sets up a nice Friday

/ October 11, 2022 at 9:06 PM

The weather will take a turn more toward unsettled starting Wednesday afternoon as some upper-level energy well out ahead of a cold front helps to induce some showers and thunderstorms across the area.

Wednesday will start fairly mild with lows in the mid-60s thanks to persistent cloud cover. Winds will stay onshore, but despite this, we should still top out solidly in the upper 70s in the afternoon ahead of thunderstorms. It certainly seems that we may get a majority of the day in rain-free, with rain chances starting to head up around commute time.

The greatest risk for showers and thunderstorms looks to be after sunset through early Thursday morning. It’s likely we’ll get a good bit of Thursday morning in rain-free, allowing highs to top out near 80° in the early afternoon. Then, it’s possible that some showers may redevelop ahead of the cold front itself as its timing should coincide with peak heating. The front gets through Thursday evening, and by Friday, we’re starting out quite a bit cooler — upper 50s as opposed to mid-to-upper-60s — with highs topping out in the mid-70s under quite a bit of sunshine. This will set up a beautiful weekend of weather with plenty of sunshine and comfortable temperatures, though perhaps not quite as cool as mentioned yesterday. Still, though, mid-to-upper 70s remain below normal for highs for this point in October.

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Tuesday: Mostly cloudy but mostly quiet; front arrives Wednesday-Thursday

/ October 10, 2022 at 9:47 PM

Not much weather to write home about for Tuesday as we get one more mostly dry day in ahead of a cold front which should bring the most substantial rain since Ian to the area for later Wednesday into Thursday. Cloud cover blanketing the area will help keep lows elevated to around 60° to start the day. Breezy onshore winds and continued cloud cover will keep high temperatures capped in the mid-70s. Much as we saw today, there is a small chance of a shower or two in the afternoon, but these won’t be horribly disruptive and should be short-lived if they do end up firing.

Another round of minor to moderate coastal flooding will be possible a couple hours around the predicted 9:40am high tide. Be ready to use alternate routes in case of flooded or closed roads in downtown Charleston.

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The week ahead: First significant rain since Ian possible Thursday

/ October 9, 2022 at 11:57 PM

On balance, the week ahead will be primarily quiet weather-wise, with the exception of Thursday as a cold front presses through the area, bringing along some showers and thunderstorms. Highs through Thursday will remain a little below normal, generally running in the mid-to-upper 70s. Conversely, cloud cover and increased moisture will keep lows at or a little above normal through Thursday morning, with lows in the mid-60s expected Wednesday and Thursday right ahead of the front.

The weather on Thursday could bear watching for a few stronger storms depending on how much instability can develop. We’ll have good wind shear in place, but the instability — as is often the case as we head into the cool season — is going to be the main question mark. More likely, though, Thursday will represent the first significant rain for the area since Hurricane Ian, though amounts certainly won’t approach Ian-like numbers.

Once the front is through, we will see cloud cover decrease and temperatures once again head well below normal for Friday and the weekend, which is looking pretty good. Highs through this period will run in the low 70s, while lows will bottom out in the upper 50s Friday and the low 50s Saturday and Sunday, several degrees below normal for this point in the year.

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