I wonder how much of each of these reservoirs are impacted by snow runoff.
All of the large ones could be almost full at this point from the precipitation so far in their watersheds, but they are deliberately kept well short of full to leave room for snowmelt runoff. The system as a whole has both storage and flood control functions. The US Bureau of Reclamation, the Army Corps of Engineers, and the State seem to have a very good handle on managing this whole network of rivers and reservoirs, at least in wet years.
All of them,,,,,unfortunately Ca. has not built a new reservoir in almost 50 years but has expanded their population and land use almost 10 fold. Keep voting in those Dems California! Seems Ca. wants the illegals to support their liberalism and eventually the Latinos will want to secede and become Venezuela. Every country in Central and South America is Liberal Latino dictatorships, they never get it right.
Snow levels in the Sierra are 200% or more above normal for this time of year. It will be a huge water year.