Board Thread:Episode Discussion/@comment-4141313-20190126081959/@comment-4141313-20190204055721

Not necessarily. If we're speaking in hypotheticals afterall.

Raven can open a portal from the location herself while Qrow and the others are still in Atlas, then morph into a bird and try to fly as fast as she can away, or if need be, dive underwater and portal to Tai. She did use a portal to get Vernal and Cinder's group into Haven when she was already there, so if she was somewhere in the waters already, she could just open a portal there.

Of course that would require her knowing whats about to happen, being able to fly there fast enough, and actually giving enough of a damn to do something.