Public Information Statement
Issued by NWS Denver/Boulder, CO

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NOUS45 KBOU 312212

Public Information Statement
National Weather Service Denver/Boulder CO
410 PM MDT Fri Mar 31 2017

Effective May 1...the Weather Forecast Office-Boulder Water Supply
Outlooks (ESFBOU) for areas east of the Continental Divide will
reflect water supply forecasts supplied by the Missouri Basin River
Forecast Center (MBRFC) and informed exclusively by the National
Weather Service`s Ensemble Prediction Service. The outlooks should
look similar to previous versions. The median or 50% exceedance
value for the ensemble will be provided for each forecast point
along with a corresponding percent of normal.

You can also find these monthly water supply forecasts at

An example product is below:

FGUS75 KBOU 132001

Water Supply Outlook
National Weather Service Denver/Boulder CO
200 PM MDT Mon Mar 13 2017

...Water Supply Outlook for north central and northeast Colorado as
of March 2017...

There was less snowfall in February compared with the previous two
months. On February 1st the mountain snowpack was around 155% of
normal. March 1st sub-basin snowpack west of the Continental Divide
varied from 118 percent of normal in the Williams Fork basin to 167
percent of normal in the Willow Creek basin. East of the divide
snowpack ranged from 125 percent of normal in the headwaters of the
South Platte River to 200 percent of normal in the Saint Vrain Creek
drainage farther north. It was even drier in early March. By March
13th high country snowpack ranged from around 120 percent of normal
in the North and South Platte Basins to 131 percent of normal in the
upper Colorado River Basin.

Basin reservoir storage at the end of February was 107 percent of
average which is similar to the storage last year. The majority of
U.S. Geological Survey gages continued to record near normal
streamflow. Seasonal volume forecasts vary widely:

                                  Median Forecast
                                      Volume      Percent
Stream and Station         Period     1000 AF      of Avg
__________________         ______     _______     _______
South Platte River
 Antero Reservoir inflow   Apr-Sep      13          83
 Spinney Mtn Res inflow    Apr-Sep      38          64
 11-Mile Canyon Res inflow Apr-Sep      39          60
 Cheesman Lake inflow      Apr-Sep      67          55
 South Platte              Apr-Sep     126          60

Bear Creek
 Morrison                  Apr-Sep       8          40

Clear Creek
 Golden                    Apr-Sep      82          74

Saint Vrain Creek
 Lyons                     Apr-Sep      90          93

Boulder Creek
 Orodell                   Apr-Sep      52          96

South Boulder Creek
 Eldorado Springs          Apr-Sep      22          59

Cache La Poudre River
 Canyon Mouth              Apr-Sep     191          93

North Platte River
 Northgate                 Apr-Sep     381         168

Colorado River
 Granby                    Apr-Jul     260         118

Willow Creek
 Willow Creek Res          Apr-Jul      70         149

Fraser River
 Winter Park               Apr-Jul      23         119

Williams Fork River
 Williams Fork Reservoir   Apr-Jul     115         120

Blue River
 Dillon Res                Apr-Jul     195         120
 Green Mtn Res             Apr-Jul     330         120

Muddy Creek
 Wolford Mtn Res Blw       Apr-Jul      57         106

Colorado River
 Kremmling                 Apr-Jul    1060         123

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
- Visit the Colorado Basin RFC for water supply forecasts west of
the divide at
- Visit our website at for additional local
weather...climate and stream information.
- Long range precipitation and temperature outlooks are available at
- Snowpack,reservoir, and water supply data from Natural Resources
Conservation Service are available at

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