The graphic below shows snowpack conditions across the west as of March 20. Overall most basins in the Central and Northern Rockies have snowpack that are near or above average, however, there are some exceptions.
There a few basins in the northern and eastern areas of Wyoming as well as north-central areas of Montana that are below average. Farther to the southwest and somewhat surprising in a strong El Nino year, some basins in Arizona and New Mexico have below normal snowpack conditions. In previous strong El Nino years, snowpack has been above normal in portions of the Desert Southwest. Also, in southern areas of Colorado and Utah, snowpack has been a bit behind this year.
Since heavy mountain snows are possible through the rest of March, April and early May, there is still an opportunity for snowpack to grow and in some areas, end up above normal.
So far, the 2015/2016 snowpack season has been very productive for drought stricken California. Snowpack levels in California and Nevada are all near or above average as of this week with more likely to come in the following weeks.
In a nice reversal of fortune, the Pacific Northwest has received above normal precipitation and snowpack in many areas after a hot and dry summer last year.
With an active weather pattern expected in the coming weeks, many basins in the far west and Rockies can expect snowpack to grow some more.