Wet weather will kick off the Memorial Day weekend as a low pressure system rides up the coast and affects the Carolinas with heavy rain, gusty winds, rough surf, strong rip currents, and very hazardous marine conditions. It’s also going to be very unseasonably cool, at least to start — think highs in the 60s for Saturday. (Seriously.)

Friday will start in the upper 50s (the normal low for May 26 is 66°, for comparison) and only warm to the low 70s with cloud cover and increasing shower activity throughout the day. Winds will be breezy, coming in from the northeast around 20 MPH with higher gusts. The best chance for showers will begin in the evening hours and last well into Saturday as the low pressure system comes ashore somewhere between Charleston and Wilmington.

We start to see a shift toward more unsettled weather beginning Thursday as low pressure begins to organize offshore, sending more moisture and some windy conditions our way. We start the day around 60° as high pressure remains wedged in place. We’ll get a fair bit of the day in rain-free as highs top out around 80° in the afternoon. As low pressure begins to organize offshore later Thursday, we’ll start to see a risk for a few evening showers.

Cool high pressure remains in control for Tuesday bringing partly to mostly cloudy skies and highs well below mid-to-late-May normals. We’ll start the day in the low 60s before temperatures head to just about 80° in the afternoon — we’re normally looking at highs in the mid-80s at this point in the year. A stray shower could develop in the afternoon, but models show a pretty deep dry slot aloft that should preclude widespread precipitation.

Sunday’s forecast brings unsettled weather back to the area as a cold front presses south into the region. We start the day on the mild side, with lows bottoming out in the upper 60s — a few clicks above normal still for this point in May. Highs top out in the low 80s before showers and thunderstorms begin to make inroads. Showers could spread into the area as early as mid-morning, though the more likely onset will be from midday into early afternoon. Evening high-resolution guidance, coming in as I write this, has been trending a little drier, with the bulk of the heavier rain across the Savannah River in Georgia where dewpoints pool ahead of the cold front, but a lot will depend on the speed of the front and how it coincides with some energy aloft. Still, be ready to turn outdoor plans into indoor plans on short notice, and watch for pockets of heavy rain at times, too.

A cold front will slowly push south across the area overnight into Thursday, but it will not bring rain chances to a close. Moisture riding atop a wedge of high pressure will keep plentiful showers and maybe some thunderstorms in the forecast. Some spots may see an additional 1-2″ of rain on top of the rain that fell on Wednesday, and additional bouts of flooding may be possible as a result. The risk for severe weather will be lower given the widespread precipitation as well as the cooler temperatures, especially behind the front. Expect highs to only top out in the mid-70s with a breezy northeasterly wind.

We’ll need to monitor for the risk for moderate coastal flooding with the 8:08 PM high tide. The current forecast is for water levels to peak between 7.5-7.7′, which should be enough to close several roads in downtown Charleston. We will obviously want to watch very closely for the prospect of heavy rain in the area around this time as the coincidence of the two would be decidedly not great. Stay tuned to forecasts throughout the day, especially if you have downtown in your plans Thursday night.

A warm front will lift north of the area tomorrow, bringing in even warmer and more humid air for Tuesday. Much of the day should stay rain-free with relatively weak instability, though a stray shower or storm near the seabreeze can’t be discounted. If a storm or two does form, note that storm motions will once again bring them toward the coast, so be aware of that if you have a Tuesday beach trip planned. (Lucky duck.) Expect highs to top out in the upper 80s; I wouldn’t be shocked to see a 90° reading somewhere, either.

Confidence is increasing in showers and thunderstorms affecting the area Sunday afternoon and especially as we get into the evening hours. We’ll start Sunday on a warm note, generally in the mid-60s, before warming quickly well into the 80s by midday. Scattered showers and storms should begin to kick off as the seabreeze develops and moves inland early in the afternoon, and coverage should increase as a front approaches the area from the northeast as we head into the late afternoon and evening. Severe weather isn’t anticipated, but lightning makes every thunderstorm dangerous, so be sure to move indoors if thunderstorms threaten. Winds around a ridge of high pressure to our west will also bring storms toward the coast, as well, so be alert if the beach is in your plans. Overall, it’s not a day to cancel outdoor plans, but have a solid indoor plan B in case storms come by.

Not much to write home about weather-wise on Thursday. We’ll see a mix of clouds and sun throughout the day and continued comfortable temperatures; lows start in the low 60s with highs topping out in the low 80s in the afternoon, with an easterly breeze and the expected broken cloud cover to be a contributor to those temperatures. All in all, no hazards are expected and it should be a fine day.

Monday was the warmest day of 2023 so far with a high of 89°, but that distinction will be short-lived as the first 90°+ temperatures of the season look likely on Tuesday ahead of a cold front. Mix in some humidity, and it’ll feel a little more like the mid-90s in the peak of afternoon heating, it looks like.

Thursday will represent the peak of our stretch of nice weather for one main reason: the pressure gradient that has kept our winds elevated for several days will finally have relaxed, bringing winds down to a light breeze during the day. Otherwise, it’s a carbon copy of Wednesday: Lows around 50°, with highs in the mid-70s in the afternoon under mostly sunny skies. I hope you can take advantage!