Charleston Weather Blog

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

Rest of the work week: Generally quiet, but turning breezy

/ December 12, 2023 at 8:32 PM

Another chilly start is in store for Wednesday as high pressure to our north keeps some cool air blowing into the area throughout the night. This will send temperatures down to the mid-30s once again, with another shot at freezing in a few more secluded spots. Wind chills will dip below 32° at times in the morning, so be sure to dress appropriately. The good news is that we warm up some compared to Tuesday, heading to the low 60s in the afternoon under partly cloudy skies.

The brief warmup doesn’t last long, though: a reinforcing cold front comes through overnight Wednesday into Thursday, ushering in strong high pressure that will not only reinforce the chill — expect highs just to top out in the mid-to-upper 50s — but also kick up the northeasterly winds, which will start to drive tidal departures higher as well, which may lead to minor to moderate coastal flooding in the morning. This strong high pressure will lead to another mid-30s start on Friday, with highs struggling to the upper 50s despite mostly sunny skies. We’ll also need to watch Friday morning’s tidal departures for the risk for additional coastal flooding.

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Tuesday: Another chilly but mostly sunny day

/ December 11, 2023 at 7:17 PM

Tuesday will be another sunny day across the area, though you’ll want a jacket as cooler-than-normal temperatures continue. We start the day in the mid-30s, but the wind chill will make it feel around freezing. Some spots well inland could hit freezing, too. Bring in your pets tonight and cover or bring in any sensitive plants, just in case. Temperatures then warm once again to merely the mid-to-upper 50s despite mostly sunny skies as cool high pressure persists. This runs a few degrees below normal; the normal high for December 12 is 63°.

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The week ahead: Mostly quiet with cooler-than-normal temperatures…until the weekend

/ at 10:26 PM

A cold front getting through overnight Sunday will clear the area by daybreak Monday, ushering in much cooler and drier air and setting up a week of below-normal temperatures. Clouds will be scouring out Monday morning, yielding abundant sunshine, but cold advection will keep temperatures capped to the mid-to-upper 50s in the afternoon.

Tuesday morning will start in the mid-30s — about 10° cooler than Monday morning — and could dip into freezing territory further inland. Highs will run a touch warmer, but only in the upper 50s to around 60° under mostly sunny skies. Temperatures moderate a little more on Wednesday before a reinforcing cold front swings through, sending Thursday’s highs down to the mid-50s with an increase in cloud cover, though dry air will preclude any rain with this front. Highs in the 50s continue to close out the work week.

As we get into the weekend, we warm up some, but the weather may turn unsettled once again as a coastal trough may develop with assistance from a storm system in the Gulf. It seems 2023 wants to go out the way it came in — with a continuous pattern of unsettled weekends. Not cool, 2023.

Weekend forecast: Mostly sunny Saturday, mostly stormy Sunday

/ December 8, 2023 at 9:35 PM

So, let’s get this out of the way: If you’re going to do stuff outside this weekend, do it Saturday. Temperatures will be unseasonably warm and there will be plenty of sunshine. Expect to start the day in the low 50s — a good ten degrees or more warmer than many of us started this morning — with highs topping out in the mid-70s in the afternoon. Aside from the risk for a stray coastal shower to sneak ashore at times, much of the metro gets Saturday in rain-free.

Sunday should be a different story. The first thing to note is that it probably won’t rain all day — there will be breaks, especially in the morning and early afternoon. However, winds will be cranking up with gusts approaching 30 MPH (and likely higher on bridges and overpasses, especially closer to the coast) ahead of a band of showers and a few thunderstorms that looks to push through during the mid-afternoon and evening hours. These could bring down some even stronger wind gusts especially inland of 17, but widespread severe weather isn’t expected given a lack of available instability. We should see any thunderstorms weaken as they approach the coast and the locally more stable air thanks to shelf waters in the upper 50s. Still, keep an ear out for possible statements or warnings in case a strong thunderstorm approaches your location.

Rain tapers off overnight Sunday as the front gets by, and it looks like high pressure will keep things on the cool side of normal for much of next week.