Greenville is starting Friday, August 14, with VFR cloud cover and possible valley fog, but the easygoing morning will give way to punishing afternoon heat. Temperatures are expected to be anomalously high, with humidity pushing the heat index to at least 105. A few showers or thunderstorms could develop after 2 p.m.
Heat Advisory Covers Friday Afternoon
The National Weather Service has issued a Heat Advisory for the Upstate from noon through 8 p.m. Friday, with heat index values potentially reaching 108 degrees, according to FOX Carolina. The agency advises residents to drink plenty of fluids, stay in air conditioning or shade, and check on relatives and neighbors, especially anyone who works or exercises outdoors.
Winds will remain WNW, offering little relief during the hottest part of the day. The National Weather Service also mentions strong to severe storms and isolated nuisance flooding across the region, according to its latest forecast discussion.
Saturday Looks Hotter And Stormier
Friday night will be muggy, with lows in the mid-70s. Showers and thunderstorms are possible in the afternoon and evening. Saturday is expected to have increased convection and potentially better severe-weather conditions, with scattered to widespread afternoon and evening showers and thunderstorms.
Sunday will see scattered afternoon and evening showers and thunderstorms. Heat will continue through early the following week, and the forecast extends through Tuesday.
Outdoor Plans May Need A Cooler Strategy
For anyone heading outside, the safest window will be the morning, before temperatures and humidity climb sharply. Avoid leaving children or pets in parked vehicles, and move indoors immediately if thunder is heard; the heat is the main threat, but any storm can turn a calm afternoon into a fast-moving mess.
According to the South Carolina Department of Public Health, its Heat Related Illness Dashboard provides county-specific data on heat-related illness.
