Charleston Weather Blog

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

Friday & the weekend: A little hotter, a touch less stormy

/ July 10, 2025 at 8:19 PM

We should see more thunderstorms on Friday as mid-level energy continues to affect the area for one more day. High pressure then ridges in aloft for the weekend, warming temperatures up and taking storm chances down a notch.

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Thursday: Another round of thunderstorms expected

/ July 9, 2025 at 11:37 PM

Another round of showers and thunderstorms is in the offing for Thursday as low pressure aloft continues to lumber through the area. A few of these storms could be on the strong to severe side, especially as the seabreeze pushes inland toward the 17-A corridor. Many of us should see storms on Thursday, with initiation possible by noon closest to the coast, moving inland as the day goes on. The main concerns will be damaging wind gusts, but some hail may be an issue, too. There will also be the risk for locally heavy rain potentially causing ponding of water on roads. And, as always, every thunderstorm is dangerous because of the lightning they produce — and given the expected instability, we may get some frequent lightning out of these.

Temperatures will warm from the mid-to-upper 70s in the morning to around the low 90s in the afternoon before storms begin to kick off and, mercifully, disrupt the heat a bit.

Rest of the work week: Increasingly stormy, still warm and muggy

/ July 8, 2025 at 7:47 PM

The rest of the work week will be characterized by scattered to numerous thunderstorms each afternoon as a weakness in high pressure aloft moves into the area from the west, adding to the available lift. The atmosphere will remain quite juicy (technical term), so the ingredients are largely there. A relative lack of wind shear will generally mean thunderstorms will be of the pulse variety — popping up, maturing, then collapsing in on themselves as rain-cooled air overwhelms the storm’s updrafts. Still, in these kinds of scenarios, wet microbursts can produce damaging wind gusts, and the strength of the mature updrafts can help produce hail. So, you’ll want to be on guard for the potential for a few severe storms. With all that said, all thunderstorms are dangerous because of the lightning they produce. When thunder roars, go indoors!

Temperatures will remain on the warm and muggy side, pretty much standard operating procedure for July. Lows in the mid-70s away from the coast, where temperatures will struggle to dip below 80°, warm to the low 90s each afternoon. Thunderstorms will help impart relief for some if not many of us, thankfully, keeping heat indices a bit more tame than they have been for the first couple days this week, but they will still rise to the upper 90s and low 100s before storms develop. Take it easy in the heat!