Several rounds of severe thunderstorms are ongoing and expected from the central and southern High Plains to the Southeast U.S. through Sunday. Large hail, damaging winds, and a few tornadoes will be possible. Thunderstorms may also bring areas of excessive rainfall which could bring flooding to parts of the aforementioned areas through Sunday. Read More >
…Wyoming May 2017 precipitation was 80 to 85 percent of average...
...Current water year precipitation is averaging 135 to 140 percent of normal across Wyoming…
…Early June mountain snowpack across Wyoming was 220 to 230 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 June…
May precipitation totals across Wyoming were 80 to 85 percent of average. Precipitation numbers varied between near 147 percent of normal over the Crow Creek/Lodgepole Creed Drainage (southeast Wyoming) to near 38 percent of normal over the Snake River Basin (western Wyoming). Current water year (October 2016 – May 2017) precipitation across Wyoming is averaging 135 to 140 percent of average.
Mountain snowpack across Wyoming was 220 to 230 percent of median by early June. Snowpack "water" numbers and/or SWEs were the highest across basins in central Wyoming (Wind, Upper Green, and Sweetwater)—varying between 200 to near 240 percent of median. SWEs across basins in southeastern Wyoming were 85 to near 100 percent of median.
Above to much above normal (160 to near 175 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 Wind, Sweetwater, and Upper Green Watersheds. The Little Snake, Upper North Platte, and Laramie Basins are forecasted to have slightly below to slightly above normal streamflow volumes during the rest of the snowmelt season.
Reservoirs storages across Wyoming remained above average at 125 to 135 percent for June.
The latest Wyoming water supply outlook graphic:
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