Matt at SJ says open to the Pass coming from the east, so Dana and all the nearby goodies are in play... As for how much snow is up there: I was at Mammoth yesterday. It looks like early April in a Huge year. Or maybe that's an understatement—you walk out of the upper deck at the Main Lodge onto snow right now. Be aware that as of this week, summer looks like it's rearing its ugly head up in the Sierra (there was no Spring, apparently, or at least so says Howard Schecter), so watch out for flooding rivers, wet slides, collapsing (huge) snowbridges, and all other known and unknown dangers of 20 or more feet of snow suddenly exposed to temperatures in the 70's.
Andy Lewicky is the author and creator of SierraDescents