Wyoming Water Supply Outlook---May 7th

…Wyoming April precipitation was 80 to 85 percent of average...

...Current water year precipitation to be near 110 to 120 percent of normal across Wyoming…

…Early May mountain snowpack across Wyoming is 130 to 140 percent of average... 

Above normal snowmelt streamflow volumes are expected this runoff season across a majority of basins in Wyoming...

…Wyoming reservoir storages remain around 90 – 95 percent of average for early May…

April precipitation totals across Wyoming were nearly 80 to 85 percent of average. Precipitation numbers varied at near 150 percent of normal over the Shoshone/Clarks Fork Watershed to near 45 percent of normal over the Wind River Basin.  Current water year (October 2013 - April 2014) precipitation totals across Wyoming were 110 to 120 percent of average.

Mountain snowpack across Wyoming was 130 to 140 percent of normal by early May.  Snowpack "water" numbers and/or SWEs continued to be the highest across north central Wyoming—varying between 130 to near 160 percent of average.  SWEs were the lowest over extreme southern Wyoming and over the Sweetwater Basin---varying from 105 to 125 percent of normal.

Above normal (110 to 135 percent) snowmelt streamflow volumes are expected across almost all major basins across Wyoming.  Well above average streamflow volumes (140 to 155 percent) are expected across the Powder…Tongue…and Shoshone Watersheds.  Below average streamflow volumes during the upcoming snowmelt season are still forecasted for the Little Wind and Sweetwater River Basins.

Reservoirs storages across Wyoming continue to be slightly below average for early May. 

The latest Wyoming water supply outlook graphic:



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