January 2009 Wyoming Water Supply Outlook

...Near normal to slightly above normal spring and summer runoff volumes expected over much of western, central, and northern Wyoming's major watersheds....

...Below normal water supply numbers forecasted over the major basins across the southern and southeastern portions of Wyoming...

Mountain snowpack across Wyoming is generally slightly below normal at 90 to 95 percent of normal. Snowpack "water" numbers and/or snow water equivalent (SWEs) figures at the beginning of January were the highest across western and northern Wyoming--with 105 -135 percent of normal.  SWEs across the central (to include the Wind River Mountains) and southern mountains varied from 75 to 100 percent of normal.

Above normal snowmelt streamflow volumes are expected across the northern and western watersheds--to include the Shoshone, Tongue, Powder, and Upper Yellowstone Basins.  The Powder and Tongue River Watersheds are expected to see the highest water supply volumes during the spring and summer runoff--at 104 to 116 percent of normal. 

The Lower Green, Upper Platte, Lower Platte, and Laramie Watersheds are expected to see below average snowmelt streamflow volumes. 

 

The latest Wyoming water supply outlook graphic:



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