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Pinedale Online > News > January 2015 > Wyoming Water Supply Synopsis – January 2015

2015 Winter Water Supply Synopsis. Photo by NOAA.
2015 Winter Water Supply Synopsis
NOAA
Wyoming Water Supply Synopsis – January 2015
Mountain snowpack 100-105% of normal
by Jim Fahey, Wyoming NOAA Hydrologist
January 8, 2015

- Wyoming December precipitation was nearly 140 percent of average.
- Current water year precipitation is averaging near 100 percent of normal across Wyoming.
- Mountain snowpack across Wyoming is 100 to 110 percent of average.
- Near normal snowmelt streamflow volumes are expected across major basins in Wyoming.
- Wyoming reservoir storages are 100 to 105 percent of average for January.

December precipitation totals across Wyoming were nearly 140 percent of average. Precipitation numbers varied between 200 percent of normal over the Big Horn River Basin to near 85 percent of normal over the Upper Bear Drainage (Southwest Wyoming). Current water year (October-December 2014) precipitation across Wyoming is nearly 100 percent of average.

Mountain snowpack across Wyoming was 100 to 105 percent of normal by early January. Snowpack "water" numbers and/or SWEs were the highest across basins west of the continental divide—varying between 115 to 140 percent of median. SWEs across basins east of the continental divide varied 85 to 110 percent of median.

Near normal (90 to 105 percent) snowmelt streamflow volumes are expected across almost all major basins across Wyoming. Above average streamflow volumes are expected across the Powder River Watershed as well as portions of the Shoshone River Drainage. The Sweetwater River Basin as well as lower portions of the Wind River Watershed are forecasted to have below normal streamflow volumes during the upcoming snowmelt season.

Reservoirs storages across Wyoming are slightly above average for January.

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Other hydrological information for Wyoming can be found at the NOAA hydrology website:
http://www.crh.noaa.gov/riw/?n=snowpack

Monthly Wyoming Hydrologic Summary and Graphics:
(updated monthly around the 15th of every month)
http://www.crh.noaa.gov/images/riw/hydro/hydro_report.pdf

Wyoming Drought Information Page:
(updated at least once a month)
http://www.crh.noaa.gov/riw/?n=drought

Wyoming Graphical Water Supply Outlook:
(updated by the 15th of every month—January-June)
http://www.crh.noaa.gov/images/riw/hydro/watersupply.png

Wyoming Average Precipitation by Basin:
(updated monthly)
http://www.crh.noaa.gov/images/riw/hydro/wyomingprecip.png

Wyoming Spring Snowmelt Runoff Flood Potential Graphic:
(updated by the 25th of the month---January-May)
http://www.crh.noaa.gov/images/riw/hydro/floodoutlook.png

Current and Forecast Wyoming Streamflows and/or River Stages:
http://water.weather.gov/ahps2/index.php?wfo=riw
http://waterdata.usgs.gov/wy/nwis/rt


Pinedale Online > News > January 2015 > Wyoming Water Supply Synopsis – January 2015

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