Charleston Weather Blog

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

Weekend forecast: Turning unsettled, but no washout

/ May 3, 2024 at 6:28 PM

A periodically unsettled weekend lies ahead as high pressure aloft gives way to a few disturbances rippling through the area. After another mild start in the mid-60s, Saturday will feature primarily isolated to scattered afternoon thunderstorms driven by the seabreeze. Temperatures will head into the mid-80s in the afternoon between any storms that fire. Overall, severe weather is not expected, but you’ll still want to take lightning into account for any outdoor plans you may have.

Sunday could feature perhaps slightly better coverage of showers and thunderstorms, but there is still no expectation of a total washout. Lows will bottom out just in the upper 60s, warming back to the mid-80s in the afternoon. Once again, you’ll want to make sure you’ve got a solid indoor backup for your outdoor plans, but don’t cancel anything, either. Just remember the old adage: “When thunder roars, go indoors.”

Friday & the weekend: Another foggy start, then a few storms to contend with

/ May 2, 2024 at 9:29 PM

Get ready for another foggy start across much of the area Friday morning, as conditions appear favorable once again for some dense fog to develop and potentially have some commute impacts. Once again, if you’re encountering fog, slow down and use those low beams.

Once fog clears by mid-morning, expect generally partly cloudy skies with highs topping out once again in the mid-80s on Friday afternoon. A few inland spots could see a shower or storm, but the vast majority of us stay rain-free.

High pressure aloft will break down in time for Saturday, and some energy moving into the area will allow for isolated to scattered thunderstorms to break out particularly in the afternoon and early evening. It won’t rain all day in any one location, but having a backup indoor plan for your outdoor plans is a smart call. With the scattering of storms, expect highs to run a couple degrees cooler on Saturday, but still in the mid-80s. Sunday looks similar, with a slightly better chance of seeing some storms in the afternoon than on Saturday. Once again, expect lows in the mid-to-upper 60s to yield to mid-80s highs in the afternoon outside of thunderstorms.

From here, it turns hot…mid-90s may be in the cards by the middle of next week as we get a solid summer preview. (Whether that’s a good or bad thing is a thought exercise left to the reader.)

Thursday: Foggy start to a warm day

/ May 1, 2024 at 9:14 PM

We’ll wake up to some fog in the area on Thursday morning, with some patches of dense fog not out of the question. This might have some commute impacts, to be ready to allow a little extra time to get where you are going tomorrow morning. Be sure to use low beams in fog, even if the sun is out — you want to be seen — but avoid the high beams as they may act to blind you.

Fog looks to scour out around 9-10am or so, and we should be in for a partly cloudy to mostly sunny day across the Lowcountry with temperatures rising to the mid-80s in the afternoon. Aside from the fog, there are no other weather concerns of note.

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Rest of the work week: Storms taper Wednesday, quiet and warm through Friday

/ at 7:16 PM

Scattered showers and thunderstorms will arrive in the metro area late Tuesday and last through Wednesday morning before tapering. An isolated storm is possible along the seabreeze in the early afternoon, but otherwise, expect a mostly quiet day of weather across the area for Wednesday. We’ll get started in the mid-60s — about 5° or so above normal for this point in the year — and warm to the mid-80s in the afternoon. These temperatures generally hold true for the rest of the week, too, as high pressure reasserts control. Thursday and Friday will be rain-free, with just a slight uptick in clouds on Friday ahead of a disturbance that brings scattered storm chances to the area for the weekend.

Tuesday: A few late-afternoon storms last into the overnight

/ April 29, 2024 at 9:54 PM

Our next chance of wet weather arrives later Tuesday as a disturbance aloft moves into the area. We start the day on a dry note, though, and not everyone will see rain all the time heading into Tuesday afternoon and evening. Expect generally partly cloudy skies away from the scattering of storms. Lows will run in the low 60s, yielding to low-to-mid-80s in the afternoon.

Showers and thunderstorms will be possible overnight Tuesday into Wednesday morning, which may have some relatively minor commute impacts depending on how quickly the disturbance can depart. Stay tuned.

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The week ahead: Above-normal temperatures as we head into May

/ April 28, 2024 at 5:36 PM

High pressure will be the main weather driver again this week, which will help drive temperatures a few degrees above normal to close out April and bring in May. Monday will be the coolest day of the period with lows in the upper 50s yielding to highs in the low 80s in the afternoon under mostly sunny skies. We warm a little bit on Tuesday with a bit more in the way of cloud cover as well (and maybe a shower or storm well inland). Seabreeze thunderstorms could be in the offing for Wednesday as we get into a stretch of temperatures about 5° or so above normal that’ll last well into the weekend. Quiet weather is expected Thursday and Friday before another disturbance potentially spawns a few isolated thunderstorms on Saturday afternoon as well as into Sunday. No washouts expected, though.