Comment by ImPostingOnHN

Aside from melting at historically fast levels, the snow itself is at record low levels. Less snow -> less snowpack -> less water.

For data, check out the second visualization here:

https://www.wcc.nrcs.usda.gov/ftpref/support/states/CO/produ...

There's no snowpack left, earlier in the season, because there's way less snow, and it's being consumed faster.