It sure has been cool and occasionally rainy over the last few days! Today’s high only made it to 77° at the airport, which barring an unforecasted heating episode will be a new record low maximum temperature for the date. The previous record low max for June 14 was 78° set in 1939. This cool pattern is thanks to an upper low aloft and a wedge of high pressure at the surface. Moisture riding atop the wedge is keeping cloud cover and the occasional showers around, and this will continue for a couple more days before the pattern turns more summer-like by the end of the week.
Periods of heavy rain will continue for much of Monday before winding down in the evening. Once again, temperatures will run well below normal (upper 70s) thanks to cloud cover and rain-cooled air. While we’ll have less rain on Tuesday, we will have one more day of cool temperatures with continued cloud cover and northerly winds on the back side of a coastal low. Before it’s all said and done, another 1-3″ of rain may have fallen across the area in what has been a wet year — we have a 6.2″ surplus of rain at the airport.
As we get into mid-week, we’ll begin to see the upper low finally take leave of the area, allowing the surface low to go with it. Showers will continue to be in the forecast, but temperatures will moderate into the lower 80s. By the end of the week and into the weekend, expect temperatures to head back into the upper 80s and lower 90s with the typical afternoon thunderstorm regime we all know and love during summers in Charleston.