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Posted by Brian Allmer on June 5, 2013


To view the entire report - CLICK HERE

To view the entire report – CLICK HERE

Denver, CO – June 5, 2013 – Colorado’s latest snowpack data, compiled by the USDA- Natural Resources Conservation Service (NRCS), shows the profound impact that a cool and wet spring can have on the state’s water supplies, in terms of both timing and quantity. The state’s mountain snowpack typically reaches its seasonal maximum in early April; this year’s snowpack finally reached its peak on April 21st, about two weeks later than normal. Cool weather has helped further delay snowmelt across the higher elevations, and continued wet weather patterns in the northern part of the state have contributed to additional snow accumulation across the high country in this region. This year’s June 1 snowpack readings are at 92 percent of median statewide, according to Randy Randall, acting State Conservationist with the NRCS. “This respectable percentage is due mainly to the generous amount of snow that remains across northern Colorado. In contrast, the snowpack in the southern portion of the state is nearly depleted even at the higher elevations”, said Randall.

With snowmelt nearly completed in the Upper Rio Grande and combined San Juan, Animas, Dolores, and San Miguel basins after reaching below average totals this season, the current streamflow forecasts for these basins call for well below average flows this summer. Late season snow accumulation in April and early May considerably improved the water supply outlook in the northern basins of the state. Streamflow forecasts for the Colorado and South Platte river basins still generally call for slightly below average flows this season but have improved considerably from predictions earlier this year.

At this stage in the melt season, high elevation temperatures will play an important role in how rapidly snowmelt will occur in the northern basins. Water managers can monitor these temperatures using data from the automated SNOTEL sites located in their watersheds. The additional snow accumulation and relatively cool weather this spring has helped ease some of the strain on water supplies in the northern part of the state. On the flip side, it is unlikely that the southern part of the state will see much relief from drought conditions this year.

The table below shows Colorado’s snowpack and reservoir storage as of June 1, 2013:

Basin Snowpack
% of Median
Reservoir Storage
% of Average
Reservoir Storage
% of Last Year
Gunnison 46 86 84
Colorado 108 83 74
South Platte 153 91 97
North Platte 87
Yampa/White 75 111 123
Arkansas 86 50 63
Rio Grande 2 40 70
San Miguel, Dolores, Animas & San Juan 2 67 64
Statewide 92 78 79

For additional information about Colorado’s water supply conditions, please visit:

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