Pockets of strong thunderstorms produced high winds, hail and lightning Thursday night and caused power outages to thousands in Montgomery County.

Pepco reported more than 10,000 customers without electricity as of 8 p.m., according to the company website. The Aspen Hill and Olney areas were particularly affected.

By early Friday, the number of outages had declined to about 6,900.

Strong thunderstorms rolled across Frederick, Loudoun and Montgomery counties during the early evening, carrying winds that gusted to 50 mph. Ping-pong ball-sized hail was reported in some areas, according to the National Weather Service.

No severe damage was immediately reported.

This report has been udpated.