http://fcps.edu/index.shtml
All Fairfax County public schools and offices will be closed on Thursday, Feb. 13

http://fcps.edu/news/emerg.shtml
All Fairfax County public schools and offices will be closed on Thursday, Feb. 13. The following activities in schools and on school grounds are canceled:

extracurricular activities
interscholastic contests
team practices
field trips
middle school after-school programs
professional learning and training courses
all adult and community education classes
recreation programs and community use by outside groups not affiliated with FCPS
School Age Child Care (SACC) centers are closed.

--end of announcemant