Wyoming Water Supply Outlook---issued February 11, 2013

...January basin precipitation was 80 to 85 percent of average across Wyoming…

…Mountain snowpack across Wyoming continues to be 80 to 85 percent of average... 

..Well below normal streamflow volumes expected across much of southern Wyoming watersheds...

…Wyoming reservoir storages continue to be near average for early February…

January precipitation across Wyoming was 80 to 85 percent of average. Precipitation numbers varied between 142 percent of normal over the Tongue Basin to 43 percent of normal over the Laramie Drainage.

Mountain snowpack across Wyoming continued to be 80 to 85 percent of normal by early February.  Snowpack "water" numbers and/or SWEs were the highest across western Wyoming—varying between 90 to 105 percent of normal.  SWEs were the lowest across southeastern Wyoming---varying from 35 to 65 percent of normal.

Near normal snowmelt streamflow volumes are expected across major basins across northwestern Wyoming---which includes the Upper Yellowstone, the Snake, and the Shoshone Watersheds.  Near normal (90 to 99 percent) streamflow volumes are also expected across the Upper Wind River Basin.

Well below normal (50 to 75 percent) spring snowmelt volumes are expected for a majority of watersheds across southern Wyoming.

Reservoirs storages across Wyoming are near average for early February.

The latest Wyoming water supply outlook graphic:



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