Mother Nature eased off a little on the heat Thursday, but San Diego County residents still faced sizzling temperatures inland, and lightning, hard rain and hail in the mountains.

The mercury hit 102 in Ramona and 99 in El Cajon, according to National Weather Service data.

However, the mercury topped out in the 80s in Poway and La Mesa, where the high temperatures earlier in the week had been in the high-90s.

The NWS received reports of one-inch-in-diameter hail from a powerful thunderstorm that moved from Riverside County into northeastern San Diego County near Warner Springs.

"It was a violent little storm,'' said Jeff Brown, the marketing manager at the Warner Springs Resort, who was driving on State Route 79 near Sunshine Summit. "The winds were high and the power lines were whipping.''

Brown said he could hear the hail bouncing off his car.

Maureen Phelps, another Warner Springs Ranch employee, said the rain was welcome as a way to cool off.

"We love it -- it's been so hot around here,'' Phelps said.

Caltrans reported some debris and standing water from flash flooding on Highway 79 in the area.

The agency also reported rain and hail on Interstate 8 near Pine Valley.

A high-surf advisory remained in effect for the beaches today. The weather service said the advisory would expire at 11 p.m. Until then, "south swell will bring dangerous rip currents to south-facing beaches,'' according to the agency. The surf was expected to be between 2 and 5 feet high.