We have one more day of Heat Advisory-level warmth on Tuesday before a front starts to usher in changes later in the day in the way of showers and thunderstorms. First, though, we start the day in the upper 70s to around 80° in the morning before highs head back into the mid-90s in the afternoon. Mid-70s dewpoints will yield heat indices around 110° for at least a couple hours. From there, showers and thunderstorms should develop in the afternoon, with more widespread coverage arriving late afternoon and evening as the front gets closer. A few storms could be on the strong to severe side with damaging wind gusts the main concern. Otherwise, heavy rain and frequent lightning are the other main concerns.

Rest of the work week: A couple more unsettled days before more typical summertime weather arrives

The lingering, stalled front will keep scattered to numerous showers and thunderstorms in the forecast for Wednesday and Thursday, particularly in the afternoons and evenings. Temperatures will run a little cooler as a result; mid-70s lows will yield to highs around 90° on Wednesday and perhaps not getting out of the upper 80s on Thursday. Deep moisture and not terribly quick storm motions could cause some minor flooding in a few spots.

The deep moisture gets shunted away on Friday, allowing for a little more in the way of a more typical summertime regime with sunshine leading to scattered afternoon thunderstorms. We’re back into the 90s, too, though dewpoints mixing down to around 70° should keep heat indices reasonably in check. (It’ll still be quite warm, though, because…well, it’s August in Charleston.)

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