Charleston Weather Blog

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

Rest of the work week: Chilly starts, but gradually warming

/ December 19, 2023 at 9:13 PM

Generally quiet weather continues through the rest of the week as high pressure remains the prominent feature at the surface and aloft. A chilly night lies ahead Tuesday into Wednesday morning, with temperatures dipping into the 20s across much of the area away from the beaches and downwind from Lake Moultrie. Make sure plants are covered and pets are inside. Temperatures warm to the low 50s — a few degrees warmer than Tuesday’s high of 51° — with mostly sunny skies featuring some transient high clouds at times.

Thursday gets off to another sub-freezing start, but the warming trend becomes more pronounced as ridging aloft strengthens further. Expect highs on Thursday to top out around 60°, once again under partly cloudy to mostly sunny skies.

Friday will still get off to a chilly start in the mid-30s, though most of us should stay above freezing as the airmass continues to modify. Highs on Friday get to the low 60s under partly cloudy skies as mid- and high-level clouds continue to move by.

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Tuesday: Turning much cooler

/ December 18, 2023 at 7:49 PM

A cold front will swing through overnight, yielding a much chillier start on Tuesday as temperatures dip down to around freezing away from the coast and downtown. Breezy northwest-to-north winds will make it feel even colder, too, with morning wind chills dipping to the mid-20s across the area. Cold advection will continue throughout the day, and despite full sunshine, northerly winds will likely keep temperatures from heading above 50° in most locations.

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The week ahead: After a record-breaking day, turning quiet — and cold

/ at 9:23 PM

After a record-breaking — historic is not hyperbole in this case, frankly — day of weather, we’ll turn back to more tranquil — and for a few days, quite cold — conditions as we head into the final shopping week before Christmas.

Monday will feature temperatures generally in the ballpark of normal, but a strong (but dry) cold front will clear the area late Monday into early Tuesday, shifting winds to the northwest and turning on the chill as high pressure builds in from the west. Expect to start Tuesday very near freezing in the metro area, and likely at or below freezing further inland. Despite sunny skies, strong cold advection should keep temperatures below 50° in the afternoon. (Brrr.) A solid freeze looks to set up for Tuesday night into Wednesday morning, with lows in the 20s across much of the area as high pressure settles in overhead. Highs on Wednesday get to about 50-51° or so with a few clouds at most.

After another freeze Thursday morning, high pressure will slip offshore and temperatures will begin to recover into the upper 50s to low 60s to close out the week. We’ll keep an eye on Christmas weekend for our next storm system, but the usual model disagreements are sufficient enough where any confidence in any rain is pretty low.

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