Charleston, South Carolina – On Monday, July 21st, thunderstorms are expected to hit Charleston in the afternoon, bringing a mix of heavy rain, high heat, and potential travel delays. Residents can expect challenging conditions starting after 2 p.m. with a high of 94°F and heat index values reaching as high as 112°F. Winds will be light but could gust up to 20 mph.
Thunderstorms and Flash Flooding Risk
The National Weather Service warns that thunderstorms are likely, with heavy rainfall that could exceed a quarter-inch during the storms. Flash flooding is a concern, especially in low-lying areas. Areas like West Ashley and Mount Pleasant, which are more prone to flooding, should be especially cautious. Localized downpours and lightning might cause delays along major routes such as U.S. 17 and I-526, particularly during the evening commute.
Plan for Stormy Monday Evening
The storms may continue into Monday night, with a 40% chance of further thunderstorm activity. If you’re planning to be out and about during this time, keep an eye on weather updates. It’s advised to limit outdoor activity during peak heat hours, especially in the afternoon. Also, make sure your devices are charged as power outages are possible in stormy weather.
A Stormy Week Ahead
Looking ahead, the weather will remain unsettled throughout the week. Tuesday will see an 80% chance of thunderstorms between 2 p.m. and 5 p.m., followed by more storms overnight. Expect additional rain showers and thunderstorms through Wednesday, with a slight decrease in activity by Friday.
Charleston 5-Day Summer Forecast
Monday, July 21: High of 94°F, afternoon storms with a heat index up to 112°F
Tuesday, July 22: High of 89°F, 80% chance of thunderstorms, flash flooding risk
Wednesday, July 23: High of 86°F, showers and storms before 2 p.m.
Thursday, July 24: High of 86°F, isolated afternoon storms
Friday, July 25: High of 89°F, mostly dry with a chance of stray storms
Saturday, July 26: High of 92°F, afternoon showers likely, humid weekend
Residents of Charleston should be prepared for the possibility of continued storms and take necessary precautions to stay safe.
