Vote-by-mail ballots in Washington must be postmarked by (instead of received by) election day, which means that ballots will continue to be counted for the next few days and possibly through the end of the week.
According to the Secretary of State's office, about 60% of all statewide ballots will be included in the first count, which will be released around 8:15pm on Election Day, November 6. Some counties are planning a second count release later that night.