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FGUS75 KBOU 092021
Water Supply Outlook
National Weather Service Denver/Boulder CO
220 PM MDT Mon Apr 9 2018
...Water Supply Outlook for north central and northeast Colorado as
of April 2018...
Streamflow volume forecasts were based upon April 1st conditions.
The north central Colorado mountain snowpack was 80 percent of
normal in the upper Colorado River basin, 83 percent of normal in
the South Platte basin, and 95 percent of normal in the North Platte
basin on April 1st. Reservoir storage remains above average.
Combined storage was 118 percent of average in the upper Colorado
River basin, and 108 percent of average in the South Platte basin on
By April 9th the snowpack had improved to 86 percent of normal in
the upper Colorado River basin, 92 percent of normal in the South
Platte basin, and 100 percent of normal in the North Platte basin.
With the recent snowfall, over 70 percent of the U.S. Geological
Survey stream gages had near to above normal flows on April 9th.
Stream and Station Period 1000 AF of Avg
__________________ ______ _______ _______
South Platte River
Antero Reservoir inflow Apr-Sep 5 34
Spinney Mtn Res inflow Apr-Sep 20 34
11-Mile Canyon Res inflow Apr-Sep 22 34
Cheesman Lake inflow Apr-Sep 41 33
South Platte Apr-Sep 79 38
Morrison Apr-Sep 8 41
Golden Apr-Sep 68 62
Saint Vrain Creek
Lyons Apr-Sep 54 56
Orodell Apr-Sep 31 57
South Boulder Creek
Eldorado Springs Apr-Sep 19 50
Cache La Poudre River
Canyon Mouth Apr-Sep 147 72
North Platte River
Northgate Apr-Sep 195 86
Granby Apr-Jul 185 84
Willow Creek Res Apr-Jul 40 85
Winter Park Apr-Jul 18 93
Williams Fork River
Williams Fork Reservoir Apr-Jul 78 81
Dillon Res Apr-Jul 140 86
Green Mtn Res Apr-Jul 225 82
Wolford Mtn Res Blw Apr-Jul 33 61
Kremmling Apr-Jul 690 80
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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The National Weather Service prepares its forecasts and other services in
collaboration with agencies like the US Geological Survey, US Bureau
of Reclamation, US Army Corps of Engineers, Natural Resource
Conservation Service, National Park Service, ALERT Users Group, Bureau
of Indian Affairs, and many state and local emergency managers across
the country. For details, please click here.