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Author: Jared Smith

Jared Smith founded @chswx on Twitter in 2008 as an experiment in disseminating weather data through social media. In the ensuing decade-and-a-half, @chswx has provided live coverage of tropical cyclones, tornadoes, severe weather, and even a couple bouts of winter weather to the good people of Charleston, SC.

Weekend forecast: Unseasonable warmth comes to an end

/ January 26, 2024 at 5:56 PM

After setting a daily high temperature record and tying the monthly high temperature record for January today, we have one more warm day for Saturday before a front brings temperatures back down to earth on Sunday. We start Saturday in the low 60s once again before warming to the mid-to-upper 70s in the afternoon. Scattered showers should be a factor ahead of the aforementioned front, but coverage won’t really amount to much until we get into the overnight as the front moves by. Showers will taper off early Sunday morning, and as cooler and drier air moves in behind the cold front, cloud cover will break up. Temperatures will be held to the mid-to-upper 60s as gusty west winds — perhaps with gusts approaching 30 MPH in the early afternoon — blow into the area. More normal temperatures return for next week, with a stretch of quiet weather expected to close January and start February.

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Friday & the weekend: Warm with occasional showers and maybe some thunder

/ January 25, 2024 at 5:45 PM

More warm and occasionally unsettled weather is on the way for Friday and the weekend. Lows will continue to run where January normal highs should be, and highs will still run well above normal, especially Friday and Saturday. In fact, Friday’s forecast high of 78° gets close to the record high of 80° set in 1950. The warm starts will lend themselves nicely to fog potential in the mornings, and sea fog may be persistent throughout the day as the warmer air overtops the much cooler waters.

Showers remain in the forecast as well as we stay within the warm sector of a stalled out frontal system. Friday could even feature a few thunderstorms, but severe weather is not anticipated. Saturday will once again feature a scattering of showers and maybe a rumble of thunder as well. A stronger front will push into the area on Sunday, pushing through later in the day to clear us out and cool us off. Showers and a few thunderstorms will be possible ahead of this front as well early in the day, but once the front is through — generally thinking early to mid-afternoon — the shower threat will end, cloud cover will decrease, and dewpoints will begin to fall.

Much more seasonable weather returns to the area starting Monday, with generally quiet conditions through at least Thursday.

Thursday’s forecast: Another unseasonably warm day with showers

/ January 24, 2024 at 8:06 PM

We hit 77° at the airport on Wednesday, narrowly missing a record high by two degrees (79°, set in 1950 and tied in 1974) and making this the warmest day so far in this young year. We have a chance to top that on Thursday despite showers working their way into the area as we stay within the broad warm sector of a storm system in the mid-South. We should start the day with some patchy fog as lows fall to the low 60s, right around the normal high for this point in the year. Temperatures will then warm to the upper 70s, and there’s a more-than-decent shot that some spots reach 80°. (The record high for January 25 is 82°, set in 1949.) A few showers will be possible across the area during the day, but coverage should be relatively sparse.

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Rest of the work week: Unseasonable warmth continues with some showers mixed in

/ January 23, 2024 at 7:01 PM

The warming trend continues Wednesday as a warm front lifts north of the area. Temperatures start in the mid-to-upper 50s owing to cloud cover blanketing us for much of the night. Once the warm front shifts ashore and winds go southeasterly, temperatures will respond further and head to the mid-70s. It’ll be kind of muggy, too, with dewpoints in the mid-60s expected behind the warm front. Scattered showers will remain possible throughout a fair bit of the day, though we should see more sun than we did Tuesday (not hard to do, tbh).

At a minimum, we’ll get the first part of Thursday in rain-free, if not the vast majority of it, before a front approaches the area and reintroduces shower and storm chances for Friday. Temperatures will peak Thursday, with lows in the low 60s and highs topping out around the mid-to-upper 70s. There will be a chance for a few showers late, but most of us should stay out of that until Friday, when shower coverage looks to increase with some thunder possible as well. Severe weather currently doesn’t appear to be a concern, though, as wind fields are largely unimpressive and instability appears meager. Temperatures on Friday will be tamped down a little by the shower activity, “only” reaching 75° after starting in the low 60s once again. We stay in the 70s on Saturday, but a second, stronger front will restore order to temperature chaos on Sunday, and by Monday, expect temperatures near normal with much more sunshine.

Tuesday: Warming trend continues, maybe a few showers

/ January 22, 2024 at 6:45 PM

After a day in which we warmed up some 14° compared to Sunday with a high of 60° at the airport, the warming trend continues for Tuesday and beyond as surface high pressure continues to move offshore. Temperatures on Tuesday start in the low-to-mid-40s — roughly where we were for a high on Sunday — and warm into the mid-60s in the afternoon under mostly cloudy skies. A few showers will be possible at times, but any rain will be generally light. Still, y’all know how traffic can get even with the lightest of rain, so prepare accordingly.

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The week ahead: Decidedly warmer, but showers hang around

/ January 21, 2024 at 10:58 PM

After a quite chilly weekend, we will be thawing out very quickly as we get into the new work week. Monday gets off to one more frigid start with lows in the mid-20s. From there, though, we start to see the arctic airmass begin to modify as a ridge builds aloft and surface high pressure shifts offshore. Monday’s high goes into the mid-50s, much warmer than we were at any point over the weekend. Then it gets downright spring-like: Tuesday warms into the mid-60s after a mid-40s start, and by Wednesday we’re in the 70s. Mid-70s take hold Thursday through Saturday ahead of a cold front, which should help to bring temperatures down a touch by Sunday.

The only fly in the ointment will be scattered shower chances beginning Tuesday and really lasting for the next few days as we sit between an upper trough to the west and ridging to the east. This will transport moisture and occasional upper-level disturbances into the area, and a surface trough along the coast will help act as a focal point for shower development. It won’t rain all the time or all day at any one spot, but all the same you’ll want rain gear handy just in case, especially heading into the weekend as the aforementioned front approaches.

Weekend forecast: Big chill incoming

/ January 19, 2024 at 6:29 PM

A rather cold weekend lies ahead as Arctic high pressure visits the Lowcountry, especially Saturday night into Sunday, which will require cold weather precautions for the next few nights.

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Friday & the weekend: Warm start, but a big chill is incoming

/ January 18, 2024 at 6:31 PM

Friday will be the last time for a few days that we’ll start the day above freezing. The day starts in the mid-40s, and there’s a risk for a stray shower or two in the morning. Most will stay rain-free, though. Temperatures will head into the low 60s by early afternoon as a cold front swings through, ushering in drier air that will help scour out the cloud deck. It’ll be windy — gusts 25-30 MPH certainly appear possible as well, so keep that in mind as you commute over bridges.

We’ll start to cool off by late afternoon, and will be quickly into the 40s by 7PM. From there, we will chill out rapidly, and temperatures will fall into the upper 20s by morning. Wind chills will drop to around 20° — and perhaps lower — and could be nasty for morning runs or the like. Temperatures only head to the mid-40s in the afternoon despite full sunshine.

Saturday night into Sunday will feature the coldest temperatures. Lows will fall to the upper teens to low 20s, and wind chills could drop to around 10° or even lower in the morning. A Wind Chill Advisory is probable Sunday morning. Cold weather precautions will be a must: protect plants, pets, pipes, and people. Temperatures on Sunday will head back to the mid-40s in the afternoon, which might feel downright balmy after how the morning will start!

After one more freezing start Monday, though, we warm up — and the 70s look to be back on Wednesday.

Thursday’s forecast: Frigid start, but warming — albeit briefly

/ January 17, 2024 at 7:23 PM

Thursday will get off to a very chilly start across the Lowcountry as calm winds and clear skies combine to allow for a solid radiational freeze across the area tonight into Thursday morning. Expect lows to bottom out in the mid-20s in a fair bit of the metro, with slightly warmer — but still at or very near freezing — temperatures near the coast. Bring pets in tonight and cover sensitive plants. Consider dripping a faucet, too, especially further inland.

The good news is that temperatures won’t stay below freezing for long after the sun comes up. High pressure will move offshore, allowing temperatures to recover to the low 60s by afternoon as cloud cover increases. There is a risk for a few showers very late Thursday into early Friday, but we’ll get the daytime hours in rain-free.

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Sharp cooldown incoming for Wednesday & Thursday morning; hard freeze this weekend

/ January 16, 2024 at 6:44 PM

A rather cold day awaits on Wednesday despite full sunshine throughout the day as chilly high pressure builds into the area. Temperatures should fall to the upper 20s in the metro area early Wednesday morning as cold air blows in. Wind chills will bottom out in the low 20s, so be sure to dress accordingly as you head out to work or school. Afternoon highs will struggle to the mid-40s as cold air continues to settle into the area throughout the day. Despite light rain during the day Tuesday, black ice doesn’t look like it will be a factor given that we’ll be drying out very quickly tonight as dewpoints plummet into the 20s.

We’ll dip a little further into the 20s overnight Wednesday into Thursday morning. Temperatures should reach freezing by late evening, and should stay there through sunrise, with roughly an 8-10 hour period of freezing temperatures a decent possibility. It’ll be a good idea to keep a faucet on a drip, make sure pets are in a warm place, and ensure plants are protected. The good news is that the freeze will quickly give way to warmer temperatures Thursday afternoon, with highs expected to peak around 60°. A few showers will be possible in the late afternoon into the evening hours, but very little overall rainfall is expected.

Friday will be the only day in the next few that’ll start above freezing; expect lows in the low 40s in the morning, followed by highs in the low 60s in the afternoon. A cold front will advance through the area roughly midday or so, but the coldest air will be delayed a little bit. Still, expect clouds to scour out as drier air moves in.

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