Two weeks after a night of rule-breaking 777X engine testing led to noise complaints, Boeing Field (King County International Airport) has published a notice of more testing at midday tomorrow:

The Boeing Company will conduct high-powered engine testing of their 777X aircraft on Tuesday, March 10. This testing is expected to take place between 10 a.m. and 1 p.m., though the exact timing may vary slightly. Under no circumstances will engine testing be conducted after 10 p.m.

If you need to file a noise complaint, the notice on the Boeing Field website offers three options.