Initial Wyoming Water Supply Outlook---January 14, 2010

...Near normal to slightly above normal spring and summer runoff volumes expected over southeastern Wyoming's major watersheds....

...Below normal water supply numbers are forecasted over the major basins across western and central portions of Wyoming...

Mountain snowpack across Wyoming is generally below normal at 75 to 80 percent of normal. Snowpack "water" numbers and/or snow water equivalent (SWEs) figures at the beginning of January were the highest across southeastern Wyoming--with 85 to 90 percent of normal.  SWEs across the rest of Wyoming varied from 65 to 85 percent of normal.

Normal to just above normal (97 to 106 percent) snowmelt streamflow volumes are expected across the southeastern watersheds--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 snowmelt streamflow volumes. 

 The latest Wyoming water supply outlook graphic:





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