Lightning strikes the United States about 25 million times a year. Most of the strikes occur in the summer, killing 20 people each year, according to the NWS. Chance of lightning increases as a thunderstorm approaches and peaks when the storm is overhead. It diminishes as the storm moves away.

The NWS Greenville-Spartanburg SC issued a severe thunderstorm warning at 3:57 p.m. on Friday in effect until 5 p.m. for Davie County.

The National Weather Service released an updated severe thunderstorm watch at 4:43 p.m. on Thursday in effect until 8 p.m. for Adams, Lancaster and York counties.