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Author: Jared Smith

Jared Smith founded @chswx on Twitter in 2008 as an experiment in disseminating weather data through social media. In the ensuing decade-and-a-half, @chswx has provided live coverage of tropical cyclones, tornadoes, severe weather, and even a couple bouts of winter weather to the good people of Charleston, SC.

Weekend forecast: Hot and humid, with more scattered storms

/ July 22, 2022 at 7:27 PM

Hot and humid conditions continue this weekend as temperatures head back to around 90° each afternoon. Mix in the humidity and it’ll feel closer to 105° on Saturday and 102° on Sunday. Scattered showers and thunderstorms will remain in the forecast primarily in the afternoons, with the risk for locally heavy rain and isolated bouts of flooding to continue. A stronger storm or two with gusty winds is certainly on the table, as well. Lightning will make every thunderstorm dangerous, so remember to head indoors if you’re hearing thunder. Overall, with high pressure beginning to reassert itself, we should see a little less coverage of showers and storms overall. Storms will certainly not be an all-day thing — just something to plan around.

We turn progressively warmer and less rainy (finally!) next week as high pressure continues to build in at the surface and aloft. Mid-90s will be common by Wednesday, with isolated to scattered storms along and ahead of the seabreeze possible each afternoon. But that’s next week; no reason to prematurely induce Sunday Scaries. Enjoy the weekend!

Friday & the weekend: Still steamy and stormy

/ July 21, 2022 at 10:16 PM

More steamy and occasionally stormy weather is in store for the weekend as a cold front moves close by and stalls out. It won’t be a total rainout, but backup plans for weekend activities are not a bad idea.

Friday should start out rain-free in the metro area, but it’ll still be quite warm as we start In the mid-to-upper 70s, warmer toward the coast. Temperatures should rise to around 90° by early afternoon before thunderstorms develop. Humidity will make it feel closer to 103°. Once again, there’s a risk for very heavy rain with these storms, and given the soaking we’ve had recently, flooding is once again a concern.

And so it will go heading into the weekend, as well, with the stalled front acting as a focal point for additional showers and thunderstorms to develop around the area. Temperatures will, before thunderstorms mess things up, top out around 90° each day, with heat indices reaching into the 100s. Heavy rain and flooding remain a threat; a wet microburst with damaging wind gusts can’t be ruled out in the strongest storms, either.

There is change coming, though. We’ll see high pressure begin to reassert itself both at the surface and aloft. This will help to suppress the more widespread thunderstorm activity we’ve seen for the balance of this month as we head into next week, though it won’t eliminate it completely as an isolated shower or storm will be possible along and ahead of the seabreeze. Temperatures, though, will continue to generally run in the low 90s each afternoon, with heat indices continuing to run in the low 100s. And so, summer rolls on. (At least the tropics remain quiet!)

Thursday: Another steamy day with afternoon thunderstorms possible

/ July 20, 2022 at 7:10 PM

We’ve got another warm, steamy day ahead on Thursday with the potential for heavy afternoon thunderstorms once again affecting the area. Temperatures will start in the mid-70s once again, and your glasses (sun or otherwise) will almost certainly fog up when you walk outside in the morning. Temperatures should rise to the low 90s by early afternoon, and when you factor in the humidity, it’ll feel closer to 105-106° or so — certainly stifling heat that’ll require precautions against heat exhaustion or heat stroke if you must be outside tomorrow afternoon.

Attention will then turn to the threat for showers and thunderstorms. The seabreeze may once again be the culprit for at least an initial round of storms, while west-northwest flow aloft will be monitored closely for any thunderstorm complexes that can develop and push our direction. The seabreeze should have an easier time moving inland tomorrow than it did today, but it could still face some resistance and stay pinned closer to the coast. We’ll want to watch the seabreeze’s inland progression carefully; the lack of such progression today, with storms firing along it and then training heavy rain in the same places, led to 2″ of rain in a little over an hour in spots and resulted in yet another urban flooding event in downtown Charleston. If storms get going, they’ll have plenty of moisture to work with, as precipitable water values continue to be in the 2-2.2″+ range. Hopefully we won’t see a repeat of today — odds are, we won’t — but we’ll keep an eye on it regardless.

Rest of the work week: Warm, occasionally unsettled, with higher rain chances Friday

/ July 19, 2022 at 7:18 PM

Our warm and occasionally stormy pattern stays in place of the rest of the work week as we remain under the influence of a broad trough aloft. Wednesday will yield another stormy afternoon with a low-end severe weather risk as a disturbance in the mid-levels moves across the Carolinas; if a storm turns severe, damaging wind gusts would be the main issue. Otherwise, it’s another hot and humid day — highs top out around 90° in the afternoon with heat indices once again peaking around 100-102° before storms develop and disrupt the temperature curve.

Thursday should run a little quieter with a little less mid-level energy in play, but we’ll still see the usual spate of isolated afternoon showers and thunderstorms along and ahead of the seabreeze. Temperatures will run a little warmer Thursday, with air temperatures in the low 90s and associated humidity yielding heat indices running around 105° in the afternoon. A cold front will sink southward toward the Carolinas on Friday; this will make showers and thunderstorms in the late afternoon and evening hours a little more likely. Temperatures on Friday continue in the low 90s with heat indices in the low to mid-100s.

Rain chances look to taper off as we get into the weekend, with scattered storms possible Saturday and more isolated storm coverage than we’ve seen in a little while expected on Sunday. It’ll stay muggy with lows in the mid-70s and highs in the low 90s each day.

Hot, steamy Tuesday with a few afternoon storms

/ July 18, 2022 at 10:33 PM

Tuesday will be another steamy July day in the Lowcountry. We’ll start the day in the mid-to-upper 70s in much of the metro area, while the beaches and downtown may very well not get below 80°. Highs will climb into the low 90s; mix in the humidity and it’ll feel closer to the low 100s. Unlike the past few days, showers and thunderstorms should hold off until the afternoon. As always, a strong storm or two can’t totally be ruled out, with wet microbursts a possibility. More broadly, though, heavy rain will be possible as precipitable water values remain around 2”, and ample amounts of energy will be conducive to lightning-laden storms.

We’ll stay in the 90s for much of the rest of the week, with heat indices approaching 105° at times. Scattered afternoon showers and storms will be the rule, with perhaps a little uptick in activity heading toward Friday as a front approaches the area.

The week ahead: Wet pattern draws down, warmth heads back up

/ July 17, 2022 at 9:26 PM

We will begin to see the widespread rain that’s punctuated the first half of July draw down a little bit this week as ridging aloft nudges back into the area. We’ve still got a couple days of periodic showers and thunderstorms to come, with another round of morning rain possibly in the cards for Monday, but overall the trend is a little drier. Of course, this is July, so nobody wins — we trend a little drier, and so temperatures trend a little more upward as the ridge builds overhead. Highs in the low 90s will be common, and with stifling humidity looking to continue, heat indices should be well into the 100s and may breach 105° several times this week. (The heat advisory criteria beginning July 1 is a heat index of 110° for two hours, so that’s why there’s no mention of Heat Advisories right now.) When storms do fire, they’ll be capable of dropping some heavy rain. Widespread severe weather isn’t expected, but you can never rule out a microburst or two this time of year. Overall, fairly standard mid-July fare is anticipated. Stay cool as best as you can — remember, frequent shaded breaks, lots of water.

Weekend forecast: Muggy with on-and-off storms

/ July 15, 2022 at 7:14 PM

We’ll stay in a warm, humid, and occasionally stormy pattern this weekend as a trough continues to affect the East. Saturday will feature more typical afternoon thunderstorm chances along and ahead of the seabreeze, while Sunday could see a little more widespread activity thanks to a little mid-level energy traversing the area. Still, a total washout of the weekend isn’t expected. We’ll have breaks in the rain, and coverage will be such that, barring any mesoscale accidents that cause storms to build back on one another, they should be reasonably short-lived. And while you can never rule out a strong downburst this time of year, the risk for widespread severe weather is low. As always, though, lightning makes every thunderstorm dangerous. When thunder roars, go indoors!

The troughiness and cloud cover will help keep temperatures down in the mid-80s. We may turn a little warmer Sunday, but air temperatures should remain sub-90°. Mix in humidity and it’ll feel closer to the low-to-mid-90s. Thunderstorms will, of course, have a moderating effect on temperatures.

All in all, it won’t be the best weekend for weather…but not the worst, either. A solid “meh” if you ask me.

Today & the weekend: Off and on storms to continue with heavy downpours

/ at 6:11 AM

After an absolute deluge last night, with some weather stations in the Summerville, Ladson, and Hanahan areas reporting upwards of 5-8+” of rain and reports of numerous roads and even some properties seeing flooding, we will continue with the risk for showers and thunderstorms for today into the weekend. Temperatures will be held into the mid-80s given cloud cover and nearby thunderstorm activity, which will be possible pretty much at any point throughout the day but particularly in the afternoon hours. It’s worth noting that it won’t rain all the time, either. We’ll undoubtedly see some peeks of sunshine intertwined in. When it does rain, though, it could be quite heavy, which isn’t good news considering how waterlogged many of us have become in this wet pattern over the past couple weeks. (In fact, the drought has been eliminated in the Charleston metro area.) The main weather hazard to watch will be flooding, but there will also be a low-end risk each day for an isolated wet microburst producing damaging wind gusts. Stay tuned to forecast updates throughout the weekend as the specific details of where it will rain exactly when are difficult to fully pin down until a few hours out.

Entering another soggy stretch to close the work week

/ July 13, 2022 at 8:07 PM

Another front will be approaching the area on Thursday, and this will bring a renewed round of heavy showers and thunderstorms in the afternoon and evening hours, one or two of which could be on the strong to severe side with damaging wind gusts. The main concern, though, will be the potential for very heavy rain. We’ve gotten pretty waterlogged in the past few weeks, and continued heavy rain on top of it will lend itself to the risk of some flooding.

It will be another sauna day, with highs topping out around 90° and heat indices rising into the low 100s thanks to the continued stifling humidity that’s blanketed our neck of the woods for the better part of July. The heat and humidity should help fuel-wise for showers and thunderstorms in the afternoon.

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Rest of the work week: Rain chances to ramp back up once again

/ July 12, 2022 at 9:54 PM

The rest of the work week will remain unsettled and turn even more so as we close it out thanks to another cold front moving into the area. Wednesday will maintain a more standard summer-like feel with highs in the low 90s and afternoon thunderstorms along and ahead of the seabreeze. By Thursday, though, we’ll start to see rain chances head back into the “likely” category once again as the aforementioned front moves in and stalls out. This’ll stick around into Friday, with perhaps even more coverage of showers and storms helping to keep highs in the mid-80s. Heavy rain continues to be a concern with any storms that fire — the atmosphere remains very juiced up — and we’ll certainly see a lightning risk with storms as well.

High tides on Wednesday and Thursday evenings will once again be capable of producing minor salt water flooding in coastal areas including downtown Charleston. We should be okay rain-wise on Wednesday, but on Thursday, we’ll want to keep a close eye on where the heavy rain is in case it coincides with the flooding high tide. Regardless of where the rain is, be ready for additional Coastal Flood Advisories from the National Weather Service.