El Niño didn’t exactly go gangbusters in southwest Colorado last month, where the key river basins received only about 35 percent of average February precipitation. Statewide mountain precipitation was only slightly better, at 56 percent of normal.
“February in the mountains of Colorado is typically a slightly drier month than compared to say, April. But a dry February like this could have big ramifications should April and May not pan out” said Brian Domonkos, Snow Survey Supervisor with the Natural Resources Conservation Service. Continue reading “Climate: U.S. West very dry in February”→
Entire state blanketed with snow in early Feburary
A pair of storms that bookended January helped raise the statewide snowpack level to 111 percent of average as of Feb. 1, according to the Natural Resources Conservation Survey.
Satellite images and other remote sensors operation by NOAA’s National Operational Hydrologic Remote Sensing Center storms left nearly the entire state blanketed in snow. Without those two storms, January snowfall would only have been about 70 percent of average for the month, said Brian Domonkos, Colorado Snow Survey supervisor with the NRCS.
Snowfall continued through February 3, which increased snowpack totals to as high as 117 percent of normal as of Feb 4. The mountains of Southern Colorado saw the greatest increase in snow-water equivalent. From January 28 to February 3. total snowpack depth increased as much as 30 inches at the Cumbres Trestle SNOTEL in the San Juan Mountain range.
As of February 1, the snowpack was below average in only a handful of minor watersheds. All other drainages were above to well above normal. While the late January storms benefitted the entire state, January precipitation as a whole was particularly slim in the Arkansas and Upper Rio Grande basins and storms only amounted to about 75 percent of normal monthly snowpack accumulation.
El Niño has been generous to Colorado this winter, favoring all of the state with near- to above-normal precipitation since the beginning of winter. As of Jan.1, nearly all the state’s river basins were above average, with only the North Platte and the Yampa drainages lagging slightly below normal.
Some past El Nino events have been known to leave the northern half of the state high and dry.
April 1 snowpack the 3d-lowest in 30 years; state preps for low runoff and summer streamflows
By Bob Berwyn
FRISCO — Colorado water users need to prepare for below-average spring and summer runoff and streamflow based on the all-important April 1 snow survey, which showed a startling drop in the state’s snowpack since early March.
After tallying readings from automated SNOTEL sites and manual snow surveys, the federal Natural Resources Conservation Service said the water content of the snowpack is just 64 percent of average, down from 89 percent at the beginning of March.
FRISCO — Colorado’s statewide snowpack continues to track near average for the winter, as two weeks of wet weather helped especially to bolster water supplies in the southern mountains.
But despite substantial accumulations statewide, the snowpack is still below average, at 87 percent of normal as of March 1. SNOTEL data shows that, during the nine-day period of February 20 through March 1, the state received 2.0 inches of snow water equivalent, 181 percent of the normal for that period.
Snowpack bountiful north, a little sparse in the San Juans
By Summit Voice
FRISCO — A persistent weather pattern across the U.S. in March once again benefited Colorado’s northern and central mountains, as a steady stream of storms brushed down the northern Rockies before roaring into the Midwest.
In the northwestern part of the state, the snowpack increased in the Colorado and Yampa river basins. The South Platte River Basin is at a near-record level. similar to 2011, according to the USDA Natural Resources Conservation Service, which released results of the all-important April 1 snowpack survey.
By contrast, southwestern Colorado is on the eastern edge of a large area that’s very dry, including near-record drought in California. The snow survey showed snowpack conditions across the southern mountains tracking below normal for the third consecutive month.