The Seattle Public Schools have announced that due to concern about weather conditions they are dismissing all middle and high schools in the district at 12:35 pm. today.

As posted on their website:

Monday, Nov. 22 - Middle and High Schools will Dismiss Early at 12:35 p.m.
Today middle and high schools will start at the regular time, but will dismiss early at 12:35 p.m. This is because snow is expected later in the afternoon. Seattle School District has canceled all activities after 12:35 p.m., including parent-teacher conferences at elementary and K-8 schools.

West Seattle Montessori is also closing early today.
As posted on their website:

West Seattle Montessori and West Seattle Academy will dismiss early today due to the snow.

Middle School Dismissals: 11:30am

Preschool-Fourth Grade Dismissals: 12pm

There will be no after-school care today.