Flood Potential Outlook
Issued by NWS Denver/Boulder, CO
FGUS75 KBOU 112234
Water Supply Outlook
National Weather Service Denver/Boulder CO
333 PM MST Wed Jan 11 2017
...Water Supply Outlook for north central and northeast Colorado as
of January 2017...
The water year began with one of the lowest snowpacks in the past 40
years. The mountain snowpack was only 4 percent of normal in the
upper Colorado River Basin and 12 percent of normal in the North and
South Platte Basins by November 15th. A few days later high pressure
finally gave way to northwest flow aloft. This allowed the storm
track to move south into Colorado. Brian Domonkos with the Natural
Resources Conservation Service stated "according to the SNOTEL data,
from November 17th through January 1st, 2017 snowpack in the
mountains grew at the fastest rate dating back to 1986, with a
statewide gain of 7.4 inches of snow water equivalent".
The current water supply forecasts use data as of January 1st. At
that time the north central Colorado basin snowpack was 117 percent
of normal west of the Continental Divide and around 105 percent of
normal east of the divide. However...the snowpack has continued to
climb to 150 to 155 percent of normal in the South Platte and upper
Colorado River Basins...and 136 percent of normal in the North
Platte Basin on January 11th.
Upper Colorado River and South Platte basin reservoir storage remains
in good shape at around 105 percent of average. Soil moisture has
also shown a marked improvement over what was seen last fall.
Most Probably Forecast
Stream and Station Period 1000 AF of Avg
__________________ ______ _______ _______
South Platte River
Antero Reservoir inflow Apr-Sep 16 99
Spinney Mtn Res inflow Apr-Sep 46 77
11-Mile Canyon Res inflow Apr-Sep 49 75
Cheesman Lake inflow Apr-Sep 89 72
South Platte Apr-Sep 164 79
Morrison Apr-Sep 11 55
Golden Apr-Sep 96 87
Saint Vrain Creek
Lyons Apr-Sep 85 89
Orodell Apr-Sep 45 83
South Boulder Creek
Eldorado Springs Apr-Sep 31 83
Cache La Poudre River
Canyon Mouth Apr-Sep 208 101
North Platte River
Northgate Apr-Sep 296 130
Granby Apr-Jul 215 98
Willow Creek Res Apr-Jul 50 106
Winter Park Apr-Jul 20 103
Williams Fork River
Williams Fork Reservoir Apr-Jul 95 99
Dillon Res Apr-Jul 155 95
Green Mtn Res Apr-Jul 260 95
Wolford Mtn Res Blw Apr-Jul 52 96
Kremmling Apr-Jul 830 97
These forecasts reflect natural flow only. Actual observed flow will
likely be affected by upstream water management.
Additional supportive information
- 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/.
- The U.S. Drought Monitor is available at droughtmonitor.unl.edu.