Winter Water Supply -- How are we doing so far?

The Natural Resources Conservation Service (NRCS) has released new data on Idaho precipation levels and snow water projections for our current water year (Oct 1, 2015 - present).  In a first graphic, you'll see how the Henry's Fork has benefitted from a wet December -- bringing us to 97% of average as of January 7th, which puts us in line with precipitation levels this time last year

A second graph shows us projections for the rest of the water year, with the thicker red line showing our current status and the black line depicting what is normal.  We spiked above that normal line in December, but have plateaued in early January.  As of January 7th, the Henry's Fork and Teton Basins sit at 10% of average January monthly totals and at 34% of the average annual total. The next few weeks will be critical for the Henry's Fork and, as the graph shows, we will have a much better idea of where we stand for the year in March or April.

 

Basin Projection Graph from NRCS (see additional link below)

 

If you'd like more information or to see these and more graphs, follow the links embedded in the text and provided below.

 

Idaho SNOTEL Water Year (Oct 1) to Date Precipitation % of Normal:

http://www.wcc.nrcs.usda.gov/ftpref/data/water/wcs/gis/maps/id_wytdprecpctnormal_update.pdf

Henrys Fork & Teton Basins 2016 Snow Water with Non-Exceedence Projections (7 sites):

ftp://ftp.wcc.nrcs.usda.gov/states/id/webftp/basin/henrys_fork_teton_swe_proj.gif

Idaho SNOTEL Precipitation Summary Update Report (the 10% and 34% numbers): http://www.nrcs.usda.gov/wps/portal/nrcs/detail/id/snow/products/?cid=nrcs144p2_047788  then select "Idaho SNOTEL Precipitation Update Report #2"

Additional Summary Reports:

http://www.nrcs.usda.gov/wps/portal/nrcs/detail/id/snow/products/?cid=nrcs144p2_047788