Wyoming Water Supply Outlook--May 6, 2013

...April basin precipitation was 115 - 120 percent of average across Wyoming…

…Mountain snowpack across Wyoming increased to near normal at 95 to 98 percent of average by early May… 

Below normal streamflow volumes are expected across central and southern Wyoming watersheds…

Above normal snowmelt runoff volumes are forecasted across a majority of headwater streams along the Powder River Basin…

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

April basin precipitation across Wyoming was 115 to 120 percent of average. Precipitation numbers varied between 155 percent of normal over the Little Snake River Basin to 90 percent of normal over the Wind River Drainage.

Mountain snowpack across Wyoming increased to near normal at around 95 to 98 percent of average by early May.  The greatest gains in snowpack "water" numbers and/or SWEs were in southern Wyoming—where SWEs in early May increased to 88 to 92 percent of normal. SWEs across northern Wyoming increased to 100 to 120 percent of normal by early May.

Streamflow snowmelt volumes are expected to be below normal across a majority of basins across central and southern Wyoming.  Above normal    (105 to 120 percent) snowmelt runoff volumes are expected across a majority of headwater streams along the Powder River Basin.  The rest of the major basins in northern Wyoming are forecasted to see near normal streamflow volumes this spring and summer.

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

The latest Wyoming water supply outlook graphic:



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