Initial Wyoming Water Supply Outlook---issued January 11, 2012

...Normal to above normal spring and summer runoff volumes expected over watersheds in northern Wyoming…

...Below normal water supply numbers are forecasted over central and southern Wyoming basins…

…Reservoir storages are over 90 percent with carryover storages from the record streamflow volumes of last year…

Mountain snowpack across Wyoming is generally below normal at near 90 percent of normal.  Snowpack "water" numbers and/or snow water equivalent (SWEs) figures at the beginning of January were the highest across northern Wyoming—varying between 90 to 135 percent of normal.  SWEs across the rest of Wyoming varied from 65 to 85 percent of normal.

Normal to above normal (90 to 120 percent) snowmelt streamflow volumes are expected across major basins across northern Wyoming---which includes the Shoshone, Big Horn, Powder, and Tongue Watersheds.

Major watersheds across central and southern Wyoming, to include the Snake, the Wind, the Upper North Platte, and the Green River Basins, are expected to see below average streamflow volumes (70 to 90 percent of normal) during the upcoming spring and summer runoff.

Reservoirs storages across Wyoming are over 90 percent in January and are the result of carryover storages from the record streamflow volumes from last year.

 The latest Wyoming water supply outlook graphic:



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