February 2008 Wyoming Water Supply Update

...Significant increases in spring and summer runoff volumes expected over the North Platte, Wind, Big Horn, Powder, and Tongue Basins...

...Above normal water supply numbers continue to be forecasted over the Snake, Yellowstone, Little Snake, and Laramie Watersheds...

There have been significant increases in snowpack "water" numbers and/or snow water equivalent (SWEs) figures during January and into early February across most of Wyoming.  This dramatic increase in mountain snowpack and corresponding SWEs is reflected in significant increases in the February snowmelt runoff volume forecast across a majority of watersheds across Wyoming.  

The biggest increase in forecasted spring and summer runoff volumes can be seen over the Wind River Basin--the January numbers indicated only 50 to 75 percent of average volumes; now the February forecast indicates that many drainages in the Wind River Basin will see 90 to 95 percent of average.

The Upper Green and Lower Green watershed water supply forecasts continue to point to well below average snowmelt streamflow volumes. 

All other major watersheds across Wyoming have seen increases in forecasted snowmelt volumes--with normal to above normal values still expected.  

The latest Wyoming water supply outlook graphic:



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