So as of right now, Biden leads the Bern 566-501. But there's still a lot of delegates to be apportioned in California and Texas, and a few remaining delegates to apportioned in several other states. I think by the time the counting is done, Biden's lead will have shrunk to between 20 and 40 delegates.
All things being equal, the March 10 states, which include Washington and Michigan, should favor Bern overall. So he could be back in the lead in a week. But this doesn't account for Biden's new momentum and Bloomberg and (soon) Warren dropping out. So my guess is that Biden will continue to slowly expand his delegate lead to a somewhat healthy plurality by convention time.