Some storms could be strong or severe, with the biggest threat being damaging wind gusts.
COLUMBIA, S.C. — Temperatures are expected to continue rising this week, with heat index values climbing each afternoon. Scattered storms are expected almost every afternoon.
As the week progresses, temperatures will rise into the mid-90s. These warm spells will bring scattered afternoon storms that may include isolated severe weather and flash flooding risks.
Regional radar shows a mesoscale convective system moving southeastward across central Kentucky. That system will be the focus today, with its remnants expected to move across the central Appalachian Mountains with the help of shortwave energy.
Temperatures will reach around 90 degrees, with damaging wind gusts possible in stronger storms. The area is at marginal risk from severe storms and there is an ongoing threat of flash flooding due to saturated soil conditions.
Scattered storms are expected, but exact times and locations are uncertain. High-resolution models show mixed forecasts, although there is consensus that late afternoon to early evening storms will favor the CSRA and south-east Midlands. These storms should weaken by midnight, with overnight lows in the mid-70s.
The hot weather will intensify, with the heat index reaching around 102 on Tuesday and 109 on Wednesday. Scattered showers and storms will develop each afternoon, with damaging wind gusts possible in the strongest storms.
Upper-level high pressure will strengthen on Wednesday and temperatures will rise to around 90 degrees. Southwest surface winds will keep dew points in the mid-70s, resulting in heat index values around 109 degrees. A thermal warning may be required. Although the air is somewhat moderately dry, the chance of showers and storms will be lower on Wednesday compared to Tuesday.
Similar conditions will occur on Thursday, with slightly warmer temperatures and a heat index of 110 degrees. Severe storms are likely due to high instability and dry air aloft, which could lead to severe downbursts.
Looking ahead to this weekend, dangerously high temperatures are expected, with the heat index exceeding 110.
