A handful of swift thunderstorms that rattled parts of San Diego County's coastline this morning were likely to move inland throughout the day, according to the National Weather Service.

Thunder, lightning and a very small touch of hail were the result of a slow-moving, low-pressure system that is moving rapidly toward the northeast, NWS forecaster Stan Wasowski said.

"It'll happen off and on, maybe with a few more significant drops later tonight or tomorrow," Wasowski said around 9:30 a.m., moments after booming thunder set off car alarms in Ocean Beach and hail pounded the pavement for just a few seconds.

According to Wasowski, today's weather was "`very typical for June gloom" and no significant rainfall was likely to occur this week.