Charleston Weather Blog

Forecast explanations, atmospheric science, and other cool weather-related stuff for Charleston, SC

Weekend forecast: Rain-free, but turning from cool to cold

/ December 16, 2022 at 8:08 PM

Not too much to write home about in the weather department this weekend except make sure you’ve got your hoodies and sweaters freshened up and ready to go. Saturday will be the “warmest” day of the weekend, with highs topping out around 60° after lows in the low 40s start the day. (West winds around 5 MPH will make it feel like the upper 30s.) Clouds will be on the increase as a relatively moisture-starved cold front approaches the area during the day.

Said front will pass through overnight, which will scour out cloud cover in time for Sunday. Temperatures will start a few degrees cooler — generally in the upper 30s with wind chills in the mid-30s — Sunday morning, but cold air advecting in from the northwest will keep high temperatures in the low 50s despite full sunshine.

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Friday & the weekend: Hoodies and sweaters at the ready

/ December 15, 2022 at 11:22 PM

We have a rain-free Friday and the weekend on tap as high pressure generally takes control. It’ll be noticeably cooler as we start Friday in the low 40s on our way to highs in the upper 50s to around 60° with mostly sunny skies. Expect similar temperatures for Saturday with increasing cloud cover in the afternoon as a reinforcing shot of cold air pushes through the area. (There will be too much dry air for precipitation with this front, though.) That’ll lead us to a rather chilly Sunday by any measure — lows in the upper 30s run on the cold side of normal for this point in the year, but the expected high of 51° is cold for our neck of the woods by any measure, and even moreso when you consider that we’ll have almost full sunshine! Suffice to say, it’ll be an excellent weekend for hoodies and sweaters of varying degrees of ugliness.

Thursday: Stormy, especially early, then cooler air settles in

/ December 14, 2022 at 9:57 PM

A warm front is lifting north across Georgia and South Carolina this evening, which will make for a warmer and more muggy day for Thursday ahead of a cold front. I’d anticipate that the forecast morning low of 57° will be set closer to midnight, followed by temperatures heading into the 60s by daybreak, topping out around 70° in the afternoon. Gusty winds will precede the front even outside of any thunderstorms — watch for gusts 30-35 MPH to potentially cause some havoc with Christmas decorations. We can expect a few showers and maybe even a thunderstorm or two overnight into the morning ahead of the main frontal band.

The timing of the front and the extent of morning shower activity will act as a governor on any severe weather threat that could develop. Shear looks good, but instability is the question mark. Still, a few storms with gusty straight-line winds are possible, and there’s even the risk for a few of these storms to rotate. Keep an eye on the weather Thursday, particularly mid-morning through early afternoon, for any possible watches or warnings that might need to be issued.

We should be rid of the rain by evening — some of the faster guidance coming in this evening even has it out of here by mid-afternoon, with some sunshine breaking out before the day’s over — with temperatures falling into the 50s by 8 PM as cooler and drier air moves in behind the cold front.

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Rest of the work week: Storm system brings showers, maybe some thunderstorms, then a cooldown

/ December 13, 2022 at 9:07 PM

The main character in the weather story for the rest of the work week will be a potent storm system barreling across the eastern half of the country, bringing with it some showers, maybe some thunderstorms, and almost certainly some cooler air for Friday heading into the weekend.

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Tuesday: A day of cooler weather before a brief warmup

/ December 12, 2022 at 7:51 PM

We’ll find high pressure wedging back into the area on Tuesday as it passes to our north. Morning lows will bottom out in the mid-to-upper 30s across the metro, with mid-30s wind chills possible with the northeasterly wind. (You might want to bring pets and sensitive plants in tonight, just in case.) With little moisture in place, we’ll see mostly sunny skies, but the influx of cooler air will keep highs pinned to the mid-50s despite the sunshine — solid sweater weather if I do say so myself.

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The week ahead: Much cooler weather on the horizon after a mid-week front

/ December 11, 2022 at 10:12 PM

Aside from a couple days in the middle of the week where we will be a little warmer ahead of a storm system, below-normal temperatures will generally be more the rule than the exception, especially as we head into the weekend in the wake of the aforementioned storm system and its associated cold front.

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