Hydrologic Outlook
Issued by NWS Denver/Boulder, CO
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922 FGUS75 KBOU 112234 ESFBOU COC001-005-013-014-019-031-035-039-047-049-057-059-069-073-075-087- 093-095-115-117-121-123-010000- 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 Volume Percent 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 Bear Creek Morrison Apr-Sep 11 55 Clear Creek Golden Apr-Sep 96 87 Saint Vrain Creek Lyons Apr-Sep 85 89 Boulder Creek 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 Colorado River Granby Apr-Jul 215 98 Willow Creek Willow Creek Res Apr-Jul 50 106 Fraser River Winter Park Apr-Jul 20 103 Williams Fork River Williams Fork Reservoir Apr-Jul 95 99 Blue River Dillon Res Apr-Jul 155 95 Green Mtn Res Apr-Jul 260 95 Muddy Creek Wolford Mtn Res Blw Apr-Jul 52 96 Colorado River 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 www.cpc.ncep.noaa.gov/products/predictions/. - 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. $$ tlh

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Page last modified: 11-Jan-2017 10:34 PM
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