One of New Jersey’s most celebrated St. Patrick’s Day parades kicked off the celebration of the holiday a few weeks early this weekend in Monmouth County. Organizers said 6,500 signed up to march in the Belmar-Lake Como St. Patrick’s Day parade, which got underway around 12:30 p.m. on Sunday. It was one of five St. Patrick’s Day parades held this weekend, the first of four weekends of parades in New Jersey. At least 30 parades are planned, culminating with parades in Highlands, Keyport and Ringwood on March 23. In addition to the Belmar parade, the 9th annual Gloucester City St. Patrick’s para…