UPDATE @ 10:14 p.m.: The showers have ended for the night, but as the clouds break there will be spotty fog by morning.
UPDATE @ 7:50 p.m.: There are some showers and pockets of gusty winds up to 35 mph still hanging around across areas south and east of Dayton this evening, Simpson said. After that, the showers will dissipate by midnight.
A brief period of driving rain did pass through Beavercreek just after 7:30 p.m.
The rain-cooled air that pushed out ahead of the thunderstorms between 5 and 7 p.m. effectively ended any threat of severe storms beyond those that hit Mercer County earlier. National Weather Service spotters did report a tree down in Rockford, in northern Mercer, as a result of those earlier thunderstorms.
Officially, the daytime temperature hit 91 at Dayton International Airport, marking the first time temps reached 91 was June 17 and 18.
UPDATE @ 4:42 p.m.: Mercer County is under a severe thunderstorm warning until 5:15 p.m., Storm Center 7 Chief Meteorologist Jamie Simpson said.
EARLIER: It will be another hot and humid day, with the chance for a few thunderstorms this afternoon or early evening, said Storm Center 7 Meteorologist Rich Wirdzek.
The heat index will reach the low- to mid-90s today, and temperatures will be in the upper-80s, he said.
Overnight, temperatures will fall to the low-70s.
Wednesday: A few showers and thunderstorms will be again possible, but mainly south of Dayton as a cold front works across the area. Highs in the mid-80s.
Thursday: Becoming less humid. Clouds and sun with highs in the low to mid-80s.