Charleston Weather Blog

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

Friday & the weekend: A quiet and seasonable start to meteorological fall

/ August 31, 2023 at 6:15 PM

A nice round of decent and less-humid post-Idalia weather continues for Friday into the weekend. Expect highs in the mid-80s each day as high pressure wedges south into the area, with a string of lows in the mid-60s for the first time since early June expected. It will be comfortable outside — not too humid, not so dry that you need to constantly apply lip balm, either. Expect dewpoints to run in the low 60s for the next few days, yielding relative humidity values around 45-50% at peak heating. Not too shabby at all. The only fly in the ointment will be the potential for coastal flooding with each high tide cycle as winds go to the northeast and remnant water loading from Idalia. We should see minor flooding with the 9:16 PM high tide this evening along with the 9:37 AM high tide on Friday, with moderate flooding expected with Friday evening’s high tide peaking just after 10PM. This will cause some road closures in downtown Charleston, so be ready if you have plans downtown on Friday night. We’ll continue to see at least minor flooding with each high tide cycle this weekend, too, as the northeasterly winds — which are giving us this rather nice start to September — persist. It’s a small price to pay for what will be some of the best air we’ve felt in a while.

As we head into Sunday and Labor Day, Summer will get a proper sendoff with highs topping out closer to the upper 80s but with little appreciable change in dewpoints. Lingering high tides may keep the rip current risk elevated at the beaches, but otherwise, things look good. We stay rain-free, in fact, through Thursday as temperatures head back into the 90s next week. Enjoy!

Thursday’s forecast: Much better

/ August 30, 2023 at 11:54 PM

After a somewhat wild day at times with Idalia, Thursday will provide much, much better weather. Lingering breezy conditions and cloud cover will give way to mostly sunny skies by afternoon, with highs topping out in the low 80s as northwest winds bring some drier air into the area. This will kick off a nice Friday and long weekend, too. We’ve earned it, methinks.

Thanks for following along, as always, throughout Idalia. Your reports were invaluable to NWS warning operations and helped your neighbors stay in the know about what was happening. Social media, for all its problems, can still be super cool in times like these.