A fierce weekend winter storm hitting New Jersey with snow, sleet, rain and strong wind gusts has knocked out power to thousands of homes and businesses. As of 9:30 p.m., more than 6,300 customers were without power statewide, according to NJ Advance Media’s power outage tracker, which shows the latest data reported by area utility companies. The quick-hitting winter storm expected to bring up 6 to 12 inches of snow several northern New Jersey counties is expected depart the state nearly as quickly as it arrived with the heaviest snow winding down after midnight, forecasters say. Some light sn…