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FGUS75 KBOU 112053
Water Supply Outlook
National Weather Service Denver/Boulder CO
153 PM MST Thu Jan 11 2018
...Water Supply Outlook for north central and northeast Colorado as
of January 2018...
Below normal mountain snowpack continues. The northern mountains of
Colorado hold substantially more snow than those in the southern
half of Colorado. On January 1st the South Platte sub-basin snowpack
ranged from 67 percent of normal in the Saint Vrain basin to 100
percent of normal in the Cache la Poudre basin. The upper Colorado
River sub-basin snowpack ranged from 64 percent of normal for
Williams Fork to 89 percent of normal in the Muddy Creek basin. The
January 1st snowpack was 81 percent of normal in the North Platte
basin and 118 percent of normal in the Laramie basin flowing north
into Wyoming. As of January 11th, the snowpack ranged from 83
percent of normal for the South Platte basin to 72 percent of normal
in the upper Colorado River basin.
Water supply remained in good shape. Reservoir storage volumes
continued holding above average. Combined reservoir storage on
January 1st was 113 and 114 percent of average in the upper Colorado
and South Platte basins, respectively. However, temperatures for the
water year have generally been above normal, contributing to the
impacts of below normal precipitation. This left volume forecasts
this spring and summer generally below to slightly below average.
Stream and Station Period 1000 AF of Avg
__________________ ______ _______ _______
South Platte River
Antero Reservoir inflow Apr-Sep 15 91
Spinney Mtn Res inflow Apr-Sep 40 68
11-Mile Canyon Res inflow Apr-Sep 42 65
Cheesman Lake inflow Apr-Sep 80 65
South Platte Apr-Sep 145 69
Morrison Apr-Sep 11 56
Golden Apr-Sep 79 71
Saint Vrain Creek
Lyons Apr-Sep 80 83
Orodell Apr-Sep 45 83
South Boulder Creek
Eldorado Springs Apr-Sep 30 79
Cache La Poudre River
Canyon Mouth Apr-Sep 168 82
North Platte River
Northgate Apr-Sep 212 93
Granby Apr-Jul 180 82
Willow Creek Res Apr-Jul 43 91
Winter Park Apr-Jul 18 93
Williams Fork River
Williams Fork Reservoir Apr-Jul 83 86
Dillon Res Apr-Jul 141 87
Green Mtn Res Apr-Jul 230 84
Wolford Mtn Res Blw Apr-Jul 36 67
Kremmling Apr-Jul 705 82
These forecasts reflect natural flow only. Actual observed flow will
likely be affected by upstream water management.
Additional supportive information
- Visit the Missouri Basin RFC information webpage for water supply
forecasts east of the divide at weather.gov/mbrfc/water.
- Visit the Colorado Basin RFC for water supply forecasts west of
the divide at cbrfc.noaa.gov/lmap/lmap.php?interface=wsup.
- Visit our website at weather.gov/bou for additional local
weather...climate and stream information.
- Long range precipitation and temperature outlooks are available at
- Snowpack and reservoir data are available from the Natural
Resources Conservation Service at www.wcc.nrcs.usda.gov/snow/.
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