New York City public school students will have a remote day Monday, the mayor and schools chancellor announced Sunday morning.

The decision will impact students that attend schools that serve grades K-5, K-8 and 6-8. Students in high schools, and students in schools that serve grades 6-12, already had a scheduled day off for a professional learning day.

“As snowfall begins to blanket our city and conditions become hazardous, closing school buildings is a necessary step to keep New Yorkers safe,” Mayor Zohran Mamdani said in a statement.

Catholic elementary schools that are part of the Archdiocese of New York, meanwhile, will be closed Monday, and students will not have to attend remotely, the archdiocese said Sunday morning. The Archdiocese of New York covers Catholic schools in Manhattan, the Bronx and Staten Island, as well as several counties north of New York City.

A Winter Storm Warning went into effect at 3 a.m. Sunday and will remain in effect through 6 p.m. Monday. Six to eight inches of snow and ice are expected in most areas, though some areas could get as much as 10 inches.