Snowmaggedon may reroute Boston’s biggest annual party, the St. Patrick’s day parade in Southie , unless enough snow melts to clear parade routes and sidewalks, the Boston Globe reports. The parade could even be postponed.

Seven and a half feet of snow have so narrowed sidewalks and complicated parking across the city that organizers are struggling to determine if South Boston can handle the 600,000 to 1 million revelers who typically attend the parade.

Mayor Marty Walsh and City Council President Bill Linehan will meet with the parade organizers, the Allied War Veterans Council of South Boston, the Globe reports.

The year’s parade is scheduled for March 15, and is set for a historic first: the South Boston War Council has given the go-ahead for an LGBT veterans group to march in the parade. 

The council has barred LGBT groups from marching in the parade for years, prompting many politicians including Walsh, who is the son of Irish immigrants, and the late Mayor Tom Menino, to refuse to march in the parade.