Warmer oceans lead to more extreme coastal rainstorms

Study tracks eastern Mediterranean climate trends

This image shows simulated precipitation (over 24 hours from 6 to 7 July 2012) of a model run using observed sea surface temperature (a) and (b) using a colder SST representative of the early 1980s). The black cross marks the town of Krymsk, the thin black lines are height contours with a distance of 150 metres.

This image shows simulated precipitation (over 24 hours from 6 to 7 July 2012) of a model run using observed sea surface temperature (a) and (b) using a colder SST representative of the early 1980s). The black cross marks the town of Krymsk, the thin black lines are height contours with a distance of 150 metres. Graphic courtesy GEOMAR Helmholtz Centre.

Staff Report

FRISCO — Rapidly warming sea surface temperatures are resulting in more extreme coastal rainstorms, Russian and German researchers said after analyzing climate data from the eastern Mediterranean and the Black Sea.

The impetus for the study was a deadly 2012 flash flood in the Russian city of Krymsk, near the Black Sea coast that killed 172 people. The Black Sea and eastern Mediterranean have warmed by about 2 degrees Celsius since the early 1980s.

The study was led led by scientists at the GEOMAR Helmholtz Centre for Ocean Research in Kiel, Germany, and published in the international journal Nature Geoscience. Continue reading

Summit County: Dillon Reservoir expected to fill within a week

Denver Water juggling inflow, outflow

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After peaking later than average, the sremaining nowpack in the Blue River Basin is melting fast. Graph courtesy Denver Water.

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Flows in Blue River tributaries like Straight Creek are near their seasonal peak.

*Story corrected at 2 p.m. Dillon Reservoir outflow to the Blue River increased to 1,600 cfs Monday, July 15.

Staff Report

FRISCO — Dillon Reservoir should be full within a week, according to the latest update from Denver Water, which just bumped up the outflow to the Lower Blue to make room for more runoff the next few days.

As of June 15, Denver Water was releasing about 1.600 cubic feet per second from Dillon Reservoir, with about 2,200 cfs flowing in from the Blue River and its tributaries. And Denver Water is expecting more high inflows for the foreseeable future, according to a recent email update:

“A fresh look at the estimated level of snowpack above Dillon Reservoir … tells us there is still eight inches of snow in some places, meaning high flows can be expected for the foreseeable future. The good news is that inflows to Dillon Reservoir – which have ranged from 2,206 to 2,623 over the past several days – appear to be trending downward.” Continue reading

Widespread flood warnings in Colorado

Hikers, motorists warned about overflowing streams and rivers

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Subtropical moisture streaming into Colorado is triggering more flood concerns.

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Flooding is possible in southwest Colorado, parts of the high country, as well as many Front Range streams.

Staff Report

FRISCO — With more subtropical moisture streaming into Colorado from the Southwest, parts of the state are under flood watches and flood warnings at the start of the weekend, including:

  • South Boulder Creek near Eldorado Springs,
  • Cache La Poudre River near Greeley affecting Weld County.
  • South Platte River at Henderson affecting Adams County.
  • South Platte River near Kersey affecting Weld County.
  • South Platte River near Weldona affecting Morgan County.
  • South Platte River near Balzac affecting Logan, Morgan and
    Washington Counties.

In the high country, the Eagle River is expected to come close to overflowing this weekend, with a flood advisory for the weekend. Other rivers running high include the Roaring Fork between Aspen and Glenwood Springs and the Colorado River from the Eagle/Grand County line to the Utah border. Continue reading

Colorado: Big flows expected in Blue River

Good news for boaters

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Healthy streamflows and good boating in the Blue River Basin. @bberwyn photo.

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Blue River snowpack still growing.

Staff Report

FRISCO — Late-season storms have helped boost snowpack in the Blue River to near last year’s level, promising healthy runoff and flows in Summit County, according to Denver Water.

The effects of the steady barrage of spring storms is already showing up the Lower Blue River, where flows are increasing due to increased releases from Dillon Reservoir, according to Denver Water, which won’t be diverting water through the Roberts Tunnel until mid-July at the earliest. Continue reading

Study: No such thing as ‘normal’ weather in Colorado

Extreme storms can happen outside expected times

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A monsoon season lighting strike in Summit County. @bberwyn photo.

Staff Report

FRISCO — A new study led by Colorado-based scientists seems to reinforce the old saying that, when it comes to the state’s weather, there’s no such thing as normal.

The research aimed to track seasonal and geographical patterns of extreme weather events, especially the monster storms that create headaches for emergency responders and resources managers. But pinpointing those trends is not easy the weather experts found. Continue reading

Morning photo: Sunday set

Summit spring


FRISCO —Sweet springtime in the Colorado Rockies. Snow on the high peaks, rivers swelling with runoff, fields and aspen groves greening up in the lengthening days and happy bluebirds! What could be better?

Climate: Drought ‘donut’ circles Colorado

Forecast for wet spring helps ease concerns

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A drought donut around Colorado?

By Bob Berwyn

FRISCO — Above-average reservoir storage and forecasts for a wet spring season could help keep Colorado out of drought trouble — even though statewide precipitation has been below average for the entire water year to-date, starting last October. As of mid-March, 40 percent of Colorado was classified as being in severe drought conditions, with only 25 percent of the state drought-free. Continue reading

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