1. Thanks to the 2- to 3-inches expected this weekend, the Metropolitan Transit Authority canceled most of its planned track work—meaning the Q train will be running to and from Manhattan.
2. on Navy Street will hold an for prospective Kindergarten students and their parents. P.S. 287, 50 Navy St. Sat., 9 a.m.
3. The Metropolitan Opera’s , directed by Robert Lepage, comes to a cataclysmic climax with a screening of Wagner's Götterdämmerung. , 30 Lafayette Ave. Sat., 11 a.m.
4. Celebrate 10 years of dance, music and community at Mark Morris with a day of free classes and performances. , 3 Lafayette Ave. Sun., 10 a.m.
5. Alternate side parking rules are in effect on Saturday.