I hiked Momyer to Dobbs on Thursday, April 23rd. It was clear of snow (a few small spots only) to Dobbs. It was a hot day, as the Momyer trailhead is relatively low in elevation.
All north facing slopes still have a lot of snow. Across Mill Creek, snow depth looked substantial on north facing slopes. Looking up at San Gorgonio driving in, there was also a lot of snow in upper elevation areas, even on south facing slopes. Thus, I think you’re looking at ice axe and crampons conditions above 10k for a while.