About these ads

Loss of northern hemisphere spring snow cover likely to amplifiy overall global warming signal

fgdh

More midwinter snow, but faster spring meltout seems to be the new climate norm in the northern hemisphere.

‘As shifts in the timing of meltout occur, we lose an important and relatively stable snowpack reservoir …’

FRISCO —Dwindling spring snow cover in the northern hemisphere could accelerate the pace of global warming, as darker-colored ground emerges earlier in the year, absorbing more of the sun’s heat and intensifying atmospheric warming.

The spring decline is evident despite a trend toward more snow in mid-winter — but June snowcover in the northern hemisphere has been below average 10 years in a row. The downward trend is mainly due to warmer temperatures, not to any big changes in overall precipitation totals, according to the most recent IPCC climate assessment. Continue reading

About these ads

Colorado: Statewide snowpack way above average

South Platte Basin snowpack at 315 percent of average

sdaf

Big snowpack lingers in Colorado Rockies. bberwyn photo.

Staff Report

FRISCO — Rivers in northern Colorado will continue to flow at high levels for several more weeks, water watchers said last week, releasing the results of the June 1 snowpack survey. While runoff season is well under way, the remaining snowpack in the Colorado River Basin is still 223 percent of median and 80 percent higher than last year’s snowpack on June 1.

The most snow lingers in the South Platte Basin, where the snowpack is at 311 percet of median. All basins north of the Gunnison are well above average, but the state’s southern basins have nearly melted out, continuing a run of drought conditions and heightening concerns about this summer’s fire season. The Rio Grande Basin and the San Juan, Animas, Dolores and San Miguel basins are at 59 and 39 percent of median, respectively. Continue reading

Colorado: A tale of two snowpacks

This is an unfiltered iPhone shot, showing that, if the light is good to begin with, you don't need a lot of technical tricks.

A deep snowpack in late March along Tenmile Creek, in Frisco, Colorado. bberwyn photo.

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.

Continue reading

Climate: How hot will it get in Colorado?

State releases draft climate change report, comments wanted

dg

How warm will it get in Colorado?

By Summit Voice

FRISCO — Climate experts say it’s about to get warmer —probably much warmer — in Colorado. A draft state climate report released this week for public comment shows that Colorado has warmed by 2.5 degrees Fahrenheit in the past 50 years. By the middle of this century, summer temperatures will be higher than in all but the hottest years, with another 2.5 to 5.5 degrees of warming expected. Continue reading

Colorado: March 1 survey shows healthy snowpack

zf

Big parts of the West are experiencing a moisture deficit this winter, with drought continuing in California.

Northwest flow favors Colorado’s northern mountains

By Summit Voice

FRISCO — For the third month in a row, Colorado snowpack is tracking above average. February, ended with the snowpack at 116 percent of median, with snowfall to-date for the water year (starting Oct. 1) at 133 percent of average.

A series of wet storm cycles pummeled the mountains during the month, with the bullseye over the north-central region, where some stations reported nearly double the average monthly snowfall. The no-Niño weather pattern has left a moisture deficit in the southwest part of the state, where the Upper Rio Grande and the combined San Miguel, Dolores, Animas and San Juan basins, are still experiencing below normal snow conditions for this time of year. Continue reading

Climate: Storms bolster Colorado snowpack

ij

Colorado’s snowpack is above average as of Feb. 1.

Feb. 1 snow survey results suggest decent spring runoff for most of the state

By Summit  Voice

FRISCO — Colorado’s snowpack surged to above average in late January thanks to a strong storm that brought snow statewide, federal water experts said last week. The Feb. 1 snow survey showed the average snowpack across the Colorado mountains at 107 percent of average, and 152 percent above last year’s Feb. 1 reading.

As of Feb. 1, only the Upper Rio Grande (82 percent) and San Juan (79 percent) basins in the southern part of the state were below average, according to the USDA’s Natural Resources Conservation Service. Continue reading

Climate: Colorado snowpack tracking near average

Above-average precipitation in October and November give state a headstart to the runoff season

dsfg

Colorado snowpack is tracking very near average for the winter so far.

By Summit Voice

FRISCO — The snowpack in nearly every river basin in Colorado is at or above normal, federal watchers said this week.

This year’s January 1 snowpack readings are at 103 percent of median statewide, according to Phyllis Ann Philipps, State Conservationist with the NRCS.

“This is a great start to the 2014 water year. As we saw in 2012 and 2013, early seasons deficits are difficult to make up later in the season … so being right where we should be this time of year gives us a head start compared to the past couple of years,” Philipps said. Continue reading

Follow

Get every new post delivered to your Inbox.

Join 7,757 other followers