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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.

Friday & the weekend: Quiet weather Friday and Sunday with rain sandwiched in on Saturday

/ January 4, 2024 at 6:27 PM

The recent spate of quick-hitting storms continues over the weekend. Friday will get off to a chilly start, with lows around freezing in the metro and likely lower further inland. Highs head to the mid-50s under mostly sunny to partly cloudy skies. Clouds will be increasing late as a Gulf storm system approaches the area, but we get the vast majority of Friday in rain-free.

Showers look to begin around midnight and will last through Saturday morning. Many spots should see an inch or more of rain, with a few spots pushing 1.5-2″. There will be the risk for a few rumbles of thunder, but no severe weather is expected. Rain should depart by mid-afternoon, so it’s not an all-day washout. Saturday will also be notable for how warm it will be: we start the day in the mid-40s and warm to near 70° in the afternoon as we remain in the warm sector of the storm system, about as warm as we’ve been in 2024’s short time.

The storm system’s cold front swings through late Saturday/early Sunday and yields a quiet end to the weekend. Lows in the mid-to-upper 40s will yield to highs around 60° in the afternoon under partly cloudy skies. Quiet weather continues Monday, though a potent storm system looks to affect the area on Tuesday with strong, gusty winds, heavy rain, and maybe some severe weather — stay tuned.

Thursday: Drying out, still cool

/ January 3, 2024 at 10:49 PM

A brief round of rain on Wednesday night will depart the area by daybreak Thursday, leaving behind a little bit cooler air as well as unfettered sunshine. We start the day in the upper 30s to around 40° before warming to the mid-50s in the afternoon — a few degrees below early January normals (60°). It’ll be a little breezy, with winds out of the north and northwest around 10-15 MPH, which will be a contributor to keeping high temperatures below normal despite all the sunshine.

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Rest of the work week: Chilly start to Wednesday, followed by showers, then quieter Thursday and Friday

/ January 2, 2024 at 8:55 PM

Wednesday gets off to a freezing start across the metro area as lows dip into the low 30s away from the warmer coastline thanks to calm winds and mostly clear skies setting up for a good night of radiational cooling. The sub-freezing air doesn’t last long, though, as moisture increases ahead of a storm system that will be traversing the Gulf of Mexico during the day Wednesday. It’ll fling some showers our direction, primarily from late afternoon Wednesday into the overnight and very early Thursday morning.

The storm system clears the area by daybreak Thursday, setting up a couple quiet days of weather. Expect highs in the mid-50s on Thursday and Friday, with an upper 30s start on Thursday before heading back to near the freezing mark on Friday morning.

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The first work week of 2024 looks mostly cool and quiet

/ January 1, 2024 at 8:58 PM

The holidays are over, and we’re back at it in 2024. The good news is that mostly quiet weather, except for a wet Wednesday evening, looks to be the rule for the first work week of 2024. A cold front coming by Monday evening (which was able to squeeze out a few showers as it passed) will set us up for a chilly start to Tuesday, with lows around freezing in the metro and likely below further inland. Despite clear skies, highs will only get to the mid-50s — a few degrees below early January normals (60°).

After a freeze in the morning, we’ll get much of Wednesday in rain-free before showers arrive generally around and after sunset ahead of another storm system. The rain from this will be reasonably short-lived, though, and should depart before daybreak on Thursday. We start Thursday around 40° and warm back into the mid-50s in the afternoon under partly cloudy to mostly sunny skies. Aside from a chillier start on Friday, in which we’ll once again flirt with freezing, expect highs to warm to the mid-50s once again under mostly sunny skies. The next storm system looks to arrive Saturday; it’ll probably be a bit more of an effective rainmaker than Wednesday evening’s storm, though it should depart by Sunday morning.

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New Year’s weekend: Quiet and chilly

/ December 29, 2023 at 5:40 PM

We’ll depart 2023 and enter 2024 with a minimum of meteorological fanfare as high pressure remains in control through Monday. Temperatures on Saturday will start in the mid-30s, but elevated winds will make it feel closer to the upper 20s. Highs will only top out in the low 50s as gusts reach 25-30 MPH once again during the prime heating of the day. The chill is in spite of nearly full sunshine, though much like Friday, a fair-weather cumulus field should take shape.

Clear skies and diminishing winds will improve radiational cooling conditions overnight Saturday into Sunday, and so we should start the day around the freezing mark away from the coast. Another mostly sunny day lies ahead, and a warming trend will start to kick in as the core of the cold air moves out. Expect temperatures to head close to 59-60° in the afternoon, right in striking distance of December 31 norms. There are no weather concerns for New Year’s festivities on Sunday night except for the need for a jacket — it’ll be getting into the low 40s in many spots as we ring in 2024.

New Year’s Day will start a little warmer, with lows in the upper 30s to around 40° warming to the low 60s in the afternoon. There will be a little more cloud cover ahead of a cold front that’ll swing through overnight Monday into Tuesday with a slight chance of a few showers. The next substantial rain chance appears to be next Thursday with a stronger front moving by, followed by high pressure leading into the first weekend of 2024.

Friday & New Year’s weekend: Generally cool and quiet, though a bit breezy at times

/ December 28, 2023 at 9:47 PM

A cold front coming through overnight will send temperatures even cooler for Friday. We start the day in the low 40s, but cold air will be blowing in throughout the day. This will keep temperatures suppressed to about the mid-50s in the afternoon despite mostly sunny skies. It’ll be a breezy day, too; winds will generally run 10-15 MPH with gusts to 25 MPH as daytime heating helps push mixing heights to about 5,000 feet. Cloud cover will generally be sparse with a fairly dry atmosphere in place, with maybe a few fair weather cumulus showing up from time to time.

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Thursday: Cloud cover breaks, cooling trend begins

/ December 27, 2023 at 8:35 PM

Thursday will be a much cooler day than Wednesday was across the Lowcountry, where most stations made it into the 70s at some point during the day, as an initial round of cooler and drier air infiltrates the area ahead of a reinforcing front which will really chill us out for Friday into the weekend. Dewpoints fall into the mid-40s throughout the night, allowing temperatures to drop generally into the low 50s to start Thursday. We’ll top out in the low-to-mid-60s in the afternoon — still a touch above normal — as clouds gradually start to break up along with the cold front’s passage.

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Rest of the work week: Drying out, cooling off

/ December 26, 2023 at 8:46 PM

After low pressure departs the area early Wednesday morning, that will be it for rain for 2023 as we’ll embark on a drying and (slow) clearing trend heading into New Year’s Weekend. Wednesday will probably be the last day we touch 70° this year as cooler and drier air starts to work into the area later in the day. We’ll see dewpoints fall first and then temperatures will follow as we get into the evening hours. This’ll yield a Thursday that starts 10° cooler (but still well above late December normals) and warms to about the mid-60s in the afternoon. We should see a bit more in the way of sunshine on Thursday, but clouds will remain a bit pesky until a stronger (but dry) front gets through late Thursday. We’ll wake up another 10° cooler on Friday, with lows in the upper 30s to around 40° yielding to highs just in the mid-50s as cooler air works into the area throughout the day. At least the sun will be out!

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Flooding possible Tuesday morning; drying out the rest of the week

/ December 25, 2023 at 8:56 PM

Wet weather continues overnight Christmas into Tuesday, as showers and thunderstorms with occasional patches of heavy rain continue to move through the area. Flooding will be a concern particularly in the morning as high tide around 7:15am, which should exceed flood stage in Charleston Harbor, could coincide with periods of heavy rain. This combination may produce more widespread flooding than a typical tidal event, making roads impassable and causing them to close. Be ready to route around flooded roads and for delays — perhaps significant — if downtown is in your travel plans Tuesday morning.

Showers and thunderstorms look to continue for a fair bit of Tuesday. We should start to see rain begin to scatter out as we head into the evening, though lingering showers will be possible overnight. Temperatures will be rather mild — the low of 60° is pretty close to the normal high for December 26. We’ll warm to the upper 60s, limited mostly by rain in the area.

Cloud cover will break up some on Wednesday as some drier air moves in. It’ll be another warm day, with lows in the upper 50s yielding to highs around 70° in the afternoon. Some cooler air begins to work into the area on Thursday as cloud cover ticks down, with highs running about 5° or so cooler than Wednesday. Then, a cold front later Thursday will usher in even cooler air, knocking Friday’s temperatures well below normal. Expect lows in the mid-30s to yield to highs only in the mid-50s in the afternoon despite mostly sunny skies.

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Turning unsettled for Christmas into Tuesday

/ December 24, 2023 at 7:57 PM

Unsettled weather arrives for Christmas as a complex and sprawling storm system begins to affect the area. We should see a few scattered showers in the morning through early afternoon, but expect shower coverage and intensity to tick up as we get further into the afternoon and evening hours. Temperatures on Christmas will run much warmer than climatology, though not into record territory. Expect lows in the mid-50s to yield to the low 70s in the afternoon before rain starts to kick in.

Water levels in Charleston Harbor look to reach flood stage (7′ MLLW) with the 6:30am high tide. This will put some salt water on some of the more vulnerable roads in Downtown Charleston, but no rain is expected to coincide, limiting the breadth of any flooding threat.

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