Lis Pendens means: Pending lawsuit affecting title to real property. 

Washington law provides that a Lis Pendens may only be recorded where there is an “action affecting title to real property.”

RCW 4.28.320 states in part that:

At any time after an action affecting title to real property has been commenced… the plaintiff, the defendant…[others] may file with the auditor of each county in which the property is situated a notice of the pendency of the action, containing the names of the parties, the object of the action, and a description of the real property in that county affected thereby.

Read more in detail here.