UPDATE: School systems delay opening on Friday

Several school systems have decided to close early Thursday, and open late Friday, due to the threat of winter weather:

The Altamont School will delay opening until 9:30 a.m. Friday.

Birmingham City Schools are canceling all after-school activities for Thursday, including all sporting events.

Blount County Schools will begin classes later than normal Friday, by 2 hours.

Cornerstone Christian in Columbiana delaying opening Friday until 9 a.m.

Cullman County Schools will open late Friday at 10 a.m.

Cullman City Schools will open late Friday, delaying opening until 10 a.m.

Franklin County Schools will delay opening until 10 a.m. Friday.

Hale County Schools will open schools Friday at 9 a.m.

Haleyville City Schools will delay opening until 10 a.m. Friday.

Hoover City Schools will delay opening for 2 hours on Friday.

Jefferson County Schools will delay opening until 9:30 a.m. Friday.

Jefferson Christian Academy will delay opening until 9:30 a.m. Friday.

Kingwood Christian in Alabaster will delay opening until 9 a.m. Friday.

Leeds City Schools will delay opening until 9 a.m. Friday.

Marion County Schools will delay opening until 10 a.m. Friday.

New Covenant will delay opening until 9:30 a.m. Friday.

Pell City Schools will delay starting classes Friday by 2 hours.

Russell City Schools will delay opening until 10 a.m. Friday.

Shelby County Schools will delay opening until 9:30 a.m. Friday.

St. Clair County Schools will delay starting classes Friday by 2 hours.

Tarrant City Schools will delay opening until 9:30 a.m. Friday.

Winston County Schools will delay opening until 10 a.m. Friday.