This was mentioned briefly in today's bulletin which can be found here:http://www.mountwashingtonavalanchecenter.org/2013/12/29/
"Today we continue to have a combined avalanche problem of left over Storm Slabs and Wind Slabs. Although many bed surfaces in our terrain are still broken up by rock cliffs, turf, and ice bulges limiting their size they are large enough to harbor unstable slabs sensitive to a human trigger. This was tested last night when 2 hikers came down from summiting Washington and traveled into “the Lip” at dark and triggered an avalanche carrying them down to the floor of the Tuckerman Ravine. They miraculously survived but sustained injuries requiring rescue during the overnight. Through history there have been a number of very lucky people in the world, they are now 2 more of them. More information will be posted in our accidents page later today."
As of right now an additional accident report is not up but I'll share it here when I see it. I have gathered this info, which has not been verified and is speculative:
They climbed up via Lions Head and intended to descend that route. Sometime after leaving the summit they got lost and ended up heading down into the Lip area of Tuckerman's.
The slab avalanche they triggered had a 2 meter crown line at it's highest and ran almost 120 meters horizontal. While those numbers are estimates (and not confirmed yet), they would indicate a F'ing big avalance that would be very unlikely to survive.
Some volunteer rescuers did not get home until 2am.
I'm hoping more details come soon, but preliminary info suggests the party probably started very late or moved very slow to be descending at 7pm. Navigational skills must have been minimal if their intended descent was Lion's Head. If they were planning on descending Lion's Head I find it very plausible they did not consult the avalanche bulletin or were un-aware of the risk they were taking descending the route they did...
Based on what I've heard of the slide it is pretty much a miracle they survived...
Everything other than what I quoted is speculative, and I hope we all get a better sense of what happened here over the next couple days...