Charleston Weather Blog

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

Tuesday: More scattered storms amidst the sauna

/ July 8, 2024 at 9:57 PM

Scattered showers and thunderstorms will stay in the forecast for much of the day Tuesday. While it won’t rain all day at any one location, a shower or storm will be possible pretty much anytime especially beyond 10am. Locally heavy rainfall will be possible, but severe weather is unlikely.

We start the day in the upper 70s to low 80s at the coast, warming to the low 90s in the afternoon. Dewpoints in the upper 70s yield heat indices in the mid-100s (though just shy of advisory criteria), which will continue this stretch of uncomfortably steamy weather.

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The week ahead: Hot, steamy, but better storm chances

/ July 7, 2024 at 10:48 PM

A surface trough and the seabreeze keeps shower and thunderstorm chances in the forecast each afternoon for much of the upcoming week. We’ll stay on the steamy side, though, with temperatures generally in the low to mid-90s each afternoon and lows in the upper 70s inland to low 80s near the coast, where additional record high minimum temperature records could be broken this week.

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Fourth of July: Mostly quiet, standard summertime warmth

/ July 3, 2024 at 6:16 PM

The Fourth of July should be a generally quiet weather day across the area, featuring partly cloudy skies and generally near-normal temperatures (read: still fairly hot). We start the day in the mid-70s and will warm to the low-to-mid-90s away from the coast, which looks to run more into the upper 80s to around 90°. The heat index will run around 100° as dewpoints remain a touch lower than they have been (generally low 70s). You’ll want the sunscreen with the UV index expected to run close to 10 at the height of the afternoon. Ridging aloft will keep a lid on any thunderstorm activity, removing Mother Nature’s fireworks from the equation this go-around.

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Rest of the week: Heat’s turning back up

/ July 2, 2024 at 10:27 PM

After a brief reprieve Tuesday, the heat is turning back up as we head into the Fourth and beyond. Winds stay onshore for one more day Wednesday, which will keep temperatures “only” in the upper 80s to low 90s. Mid-70s dewpoints, though, will make it feel like the upper 90s during the height of the afternoon. Ridging building in aloft will keep a lid on any shower and thunderstorm development.

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Tuesday: Not quite as hot, a stray shower or storm possible

/ July 1, 2024 at 10:32 PM

We get a brief reprieve from the heat on Tuesday as the front that brought today’s deluge nudges just south enough for a little bit of cooler and drier air to work in, especially further inland. Mostly cloudy skies will be the rule as onshore flow persists throughout the day. We start the day in the low 70s, but dewpoints sneaking briefly back into the upper 60s could feel a little bit better than we’ve felt. Those dewpoints will start to creep back up, but the cloud cover and onshore flow keeps highs capped to the mid-80s. A stray storm can’t be totally ruled out near the coast; in fact some model data suggests a few downpours will be possible before sunrise. Wait and see on that, but most of us should get Tuesday in rain-free.

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