Wyoming Water Supply Outlook---updated February 11, 2010

…Below normal mountain snowpack across Wyoming…

...Below normal spring and summer runoff volumes expected over a majority or Wyoming's major watersheds...

…Reservoir storages statewide remain at 100 to 105 percent of average…

Mountain snowpack across Wyoming is generally below normal at 62 to 81 percent of normal. Snowpack "water" numbers and/or snow water equivalent (SWEs) figures at the beginning of February continue to be the highest across southeastern Wyoming--with 80 to 85 percent of normal.  SWEs across the rest of Wyoming varied from 62 to 75 percent of normal.

Below normal (75 to 98 percent) snowmelt streamflow volumes are expected across the major watersheds in southeastern Wyoming--to include the Laramie, the Little Laramie, and the Deer Creek Basins.  

Major watersheds across western and central Wyoming, to include the Snake, the Upper Yellowstone, the Wind, and the Big Horn Basins, are expected to see below average spring snowmelt streamflow volumes. 

 Reservoir storages across Wyoming remain at 100 to 105 percent of average.  Boysen Reservoir is 95 percent full; Pathfinder Reservoir is at 72 percent of capacity; and Jackson Lake is at 75 percent of capacity.

The latest Wyoming water supply outlook graphic:



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