Snowpack news: Some areas of Colorado received a foot or more of snow from the recent storm


From the Associated Press via the Glenwood Springs Post Independent:

A storm dropped more than a foot of snow on parts of the Colorado mountains Monday and left some roads in Denver and Colorado Springs glazed with ice for the morning commute.

The Western Slope, meanwhile, continued its dry stretch, with Aspen Mountain and Sunlight Mountain getting only an inch of new snow.

Eldora Mountain Resort near Boulder reported 15 inches of new snow. Breckenridge and Winter Park ski areas reported 7 inches.

The National Weather Service said 13 inches fell near St. Marys Glacier in Gilpin County in the mountains west of Denver…

The statewide snowpack, which accounts for much of Colorado’s water, stood at 81 percent of the 30-year average before the storm hit.

Snow depth in the South Platte, Arkansas and Colorado river basins ranged from 91 to 102 percent of average, while the southwest corner of the state remained locked in a drought, with snowpack at 60 percent to 75 percent of average.

The northwest corner of the state had about 85 percent of average snowpack.

From the USDA via the High Plains/Midwest Ag Journal:

An unusually warm, dry January slowed snowpack accumulation in much of the West, according to data from the second 2015 forecast by the United States Department of Agriculture’s National Water and Climate Center. California, Arizona and New Mexico, as well as parts of Colorado, Utah, Oregon and Nevada, remain in prolonged drought.

“January is usually a big month for snowpack accumulation,” NWCC hydrologist Cara McCarthy said. “But most of the West didn’t see significant gains this month. With isolated exceptions, only Arizona, New Mexico, Utah and Montana received near average precipitation last month.”

“This is as low a snowpack as I’ve seen across the Sierra Nevada and Cascades for many locations at this time of year,” said NWCC Director Mike Strobel. Several Snow Telemetry sites in those ranges are snowless, which is very unusual for this time of year.

Even the precipitation in the Southwest wasn’t enough to take these regions out of drought conditions. In Western states where snowmelt accounts for the majority of seasonal water supply, information about snowpack serves as an indicator of future water availability. Streamflow in the West consists largely of accumulated mountain snow that melts and flows into streams as temperatures warm in spring and summer. NWCC scientists analyze the snowpack, air temperature, soil moisture and other measurements taken from remote sites to develop the water supply forecasts.

The Cascades of Oregon and Washington have received normal levels of precipitation this water year, but it’s mostly fallen as rain instead of snow. California’s Sierra Nevada has seen little rain or snow. The extreme drought in California may be further aggravated by reduced streamflow in other parts of the West.

“This month the inflow forecast for Lake Powell fell from 90 to 70 percent of normal,” said McCarthy. “Because southern California draws water from the Colorado River, this may impact their water supply. This is only the second forecast of the season, and there’s still time for conditions to change. We’ll keep watching conditions and updating our forecasts as the year continues.”

The NWCC, part of USDA’s Natural Resources Conservation Service, monitors conditions year-round and will continue to issue monthly forecasts until June. The water supply forecast is part of several USDA efforts to improve public awareness and mitigate the impacts of climate change, including drought and other extreme weather events. Through the creation of the National Drought Resilience Partnership, launched as part of the president’s Climate Action Plan, federal agencies are working closely with states, tribes and local governments to develop a coordinated response to drought.

Since 1939, USDA has conducted snow surveys and issued regular water supply forecasts. Other resources on drought include the U.S. Drought Monitor. For information on USDA’s drought efforts, visit USDA Disaster and Drought Information. To learn more about how NRCS is helping private landowners deal with drought, visit the NRCS’ drought resources.

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