Wyoming Water Supply Outlook April 7 2017
…Wyoming March 2017 precipitation was 135 to 145 percent of average…
…Current water year precipitation continues to average 135 to 145 percent of
normal across Wyoming…
…Mountain snowpack across Wyoming is 110 to 120 percent of median…
…Above to much above normal snowmelt streamflow volumes are still expected
across most major basins in Wyoming…
…Wyoming reservoir storages are 125 to 135 percent of average for April…
March precipitation totals across Wyoming were 135 to 145 percent of average.
Precipitation numbers varied between near 255 percent of normal over the Wind
River Drainage (central Wyoming) to near 65 percent of normal over the Little
Snake River Basin (south central Wyoming). Current water year
(October 2016 – March 2017) precipitation across Wyoming continues to be
135 to 145 percent of average.
Mountain snowpack across Wyoming was 110 to 120 percent of median by early April.
Snowpack “water” numbers and/or SWEs were the highest across basins in central
Wyoming (Wind, Upper Green, and Sweetwater)—varying between 165 to near 200
percent of median. SWEs across basins in eastern-southeastern Wyoming were 85
to near 100 percent of median.
Above to much above normal (160 to near 170 percent) snowmelt streamflow
volumes continue to be expected across almost all major basins across Wyoming.
Well above average snowmelt streamflow volumes are still expected across the
Snake, Wind, Sweetwater, Shoshone, and Upper Green Watersheds. The Little
Snake, Upper North Platte, and Tongue Drainages are forecasted to have
slightly below to slight above normal streamflow volumes during the upcoming
Reservoirs storages across Wyoming remained above average at 125 to 135
percent for April.