Flood Potential Outlook
Issued by NWS Denver/Boulder, CO

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FGUS75 KBOU 080007

Water Supply Outlook
National Weather Service Denver/Boulder CO
507 PM MST Wed Mar 7 2018

...Water Supply Outlook for north central and northeast Colorado as
of March 2018...

The north central Colorado mountain snowpack ranged from 80 percent
of normal across the upper Colorado River basin to 88 percent of
normal in the North Platte basin on March 7th. Future snow would
need to be 144, 158 and 192 percent of normal respectively, for the
South Platte, North Platte and upper Colorado River basins to reach
their normal peak snowpack this spring.

March 1st sub-basin snowpack in Summit and Grand Counties west of
the Continental Divide varied from 80 percent of normal in the
Williams Fork basin to 100 percent of normal in the Muddy Creek
drainage. East of the divide the snowpack ranged from 71 percent of
normal in the Saint Vrain Creek watershed to 103 percent of normal
in the Laramie River basin flowing into Wyoming. The majority of
NRCS SNOTEL gages are above 9000 feet. It has been drier and the
snowpack farther below normal in the foothills.

Reservoir storage volumes remained above average at the beginning of
March. Combined reservoir storage was 117 and 110 percent of average
in the upper Colorado and South Platte River basins, respectively.
Less than a third of the U.S. Geological Survey stream gages had
below normal flows on March 1st. By March 7th, half of the stream
gages had below normal flows.
                                       Median Forecast
                                      Volume      Percent
Stream and Station         Period     1000 AF      of Avg
__________________         ______     _______     _______
South Platte River
 Antero Reservoir inflow   Apr-Sep       7          43
 Spinney Mtn Res inflow    Apr-Sep      24          41
 11-Mile Canyon Res inflow Apr-Sep      25          39
 Cheesman Lake inflow      Apr-Sep      50          40
 South Platte              Apr-Sep      95          46

Bear Creek
 Morrison                  Apr-Sep       9          49

Clear Creek
 Golden                    Apr-Sep      74          67

Saint Vrain Creek
 Lyons                     Apr-Sep      62          65

Boulder Creek
 Orodell                   Apr-Sep      36          66

South Boulder Creek
 Eldorado Springs          Apr-Sep      23          61

Cache La Poudre River
 Canyon Mouth              Apr-Sep     151          74

North Platte River
 Northgate                 Apr-Sep     219          96

Colorado River
 Granby                    Apr-Jul     190          86

Willow Creek
 Willow Creek Res          Apr-Jul      40          85

Fraser River
 Winter Park               Apr-Jul      18          93

Williams Fork River
 Williams Fork Reservoir   Apr-Jul      80          83

Blue River
 Dillon Res                Apr-Jul     145          89
 Green Mtn Res             Apr-Jul     235          85

Muddy Creek
 Wolford Mtn Res Blw       Apr-Jul      36          67

Colorado River
 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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