According to the rangers, the Whitney region received ~18" of new snow early last week. I did the MR with Jim (aka Icejock) and several other parties over the weekend. Jim and I hiked from ~7200' to LBSL on Friday, up to the moraine below the east face on Saturday, to the summit and back down to LBSL on Sunday, and then back down to the truck on Monday.
A group of three guys from Ohio broke trail up to the Portal on Thursday night, up to LBSL on Friday, and with an alpine start (0330) to just below Iceburg Lake on Saturday. They claimed that this was their first visit to the Sierra Nevada, and that they didn't have much mountaineering experience but I don't beleive them because they did a perfect job of routefinding and breaking trail!
The snow was perfect all the way up but the prolonged period of warm weather is changing that pretty quickly.
As of Monday afternoon, the road was mostly melted out up to the big rockfall. There was a few hundred yards of 8-12" deep snow on the switchbacks. Beyond the rockfall it was all snow. There are a couple of small sections of trail between the portal and the NF that have melted out.
There was enough snow on the NF to stay on the creek without having to climb the Ebersbacker Ledges. But it is rotting fast and I would expect that a few more days of warm weather will make it necessary to climb the ledges. At the very least, people going up the North Fork will want to travel the sections below and above LBSL at night.
The slope leading from LBSL to Clyde Meadow had 6-8" of unconsolidated snow sitting on top of a very hard layer. There was evidence (debris) of small slide activity below the N slope of Thor at Clyde Meadow. The headwall of the UBSL basin released 4 times during the half hour while we were watching it around mid-day Saturday. The base of the Pinnacle ridge is a very large, 6" thick hard slab.
All of the SE facing slopes have been getting isothermic in the afternoons, and were very active dropping snowballs while we were there. I would recommend being very alert for point release activity on those slopes, and avoid traversing SE slopes or being in the runout zones in the afternoon.
Snow in the east face couloir was sun-crusted but stable. A decent glissade was possible all the way down that couloir, but it was a bit slow and bumpy.
Where the sun hits the base of the NW chute (right above the notch), there's maybe 15 feet of exposed, iced-up rock that can be pretty tricky and gave some parties some difficulty. This can be avoided by sticking to the dry rock on the N side (3rd class). Above that, the snow was absolutely perfect all the way to the summit. The first person up on Sunday kicked steps that held solid all day for 6 people going up and down (I was the last up and the last down on Sunday). I measured the steepest part of this chute with a clinometer, it is roughly 55 degrees (but seems a lot steeper). If the snow softens up, it will be pretty treacherous.
With the warm weather, conditions are changing fast.