I assume this is water-equivalent snowpack, essentially if the square foot of snow melted into water and stayed within that square foot, that would be the number represented in this graph?

The Sierras have an absolute shitload of snow this year, and it's pretty incredible. Looking forward to all that snow melting and being used to recharge our aquifers and reservoirs and growing insane amounts of food.

It's also incredible that over 70 million acre-feet of runoff from rain and snow is expected this water year in California alone. That's almost 6 times the entire Colorado River Basin's flow over the past 20 years (~12 million acre-feet). Of course we can only capture a fraction of it, but it's still enough to bring the state back into a good spot (though aquifers take many years to recharge).