Charleston Weather Blog

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

Sunday’s forecast: Storms turning likely by evening

/ July 22, 2023 at 10:01 PM

Standard July warmth and mugginess will continue on Sunday. We’ll start the day in the mid-70s under partly cloudy skies, and we should get the first part of the day in rain-free. From there, we’ll start to see showers and thunderstorms develop by mid-afternoon and make their way into the area from the west and southwest throughout the rest of the evening. The strongest storms could produce strong wind gusts, while heavy rain and frequent lightning will be more widespread concerns. Be ready to bring outdoor activities inside if thunderstorms approach.

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Weekend forecast: Scattered storms, not quite as hot (but still hot)

/ at 7:53 PM

Air temperatures return to more reasonable levels for mid-July this weekend as a trough digs in a bit more, nudging the ridge that had brought us quite a hot stretch back to the west. It will also improve shower and thunderstorm chances across the area starting Saturday afternoon. Granted, it will still be humid, and heat indices on Saturday in particular will head back north of 100°, but not quite as high as we’ve seen the past few days. Showers and thunderstorms should fire in the afternoon and evening as disturbances round the base of the trough. One or two of these storms could produce strong wind gusts. Be ready for rapidly changing conditions, but don’t cancel any outdoor plans, either.

Sunday could be a little more active as another disturbance passes by. It could instigate scattered storms by midday, but they’ll be more likely in the afternoon. Again, not expecting a washout by any stretch, but be ready to bring outdoor plans inside if thunderstorms approach your location. Highs top out in the low 90s Sunday with heat indices approaching 100°.

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