National Weather Service United States Department of Commerce

Marginally Severe Thunderstorms Possible Across the North and East, Elevated Fire Danger South Again Today

Strong to marginally severe thunderstorms are possible as a cold front pushes across northern and eastern Wyoming this afternoon and evening. Elevated fire danger will remain over most of southern Wyoming this afternoon where very dry, windy and warm conditions; isolated high-based thunderstorms are expected. Read More >

 

…Wyoming December 2016 precipitation was 170 to 180 percent of average...

...Current water year precipitation is averaging 110 to 115 percent of normal across Wyoming…

…Mountain snowpack across Wyoming is 105 to 110 percent of median... 

Above normal snowmelt streamflow volumes are expected across most major basins in Wyoming…

…Wyoming reservoir storages are 115 to 125 percent of average for January…

December 2016 precipitation totals across Wyoming were 170 to 180 percent of average. Precipitation numbers varied between 255 percent of normal over the Wind River Drainage to near 120 percent of normal over the Little Snake Watershed (south central Wyoming).  Current water year (October-December 2016) precipitation across Wyoming is 110 to 115 percent of average.

Mountain snowpack across Wyoming was 105 to 110 percent of median by early January.  Snowpack "water" numbers and/or SWEs were the highest across basins in central through western Wyoming—varying between 115 to 145 percent of median.  SWEs across basins in southeastern Wyoming were near to 100 percent of median.  SWEs across the Powder River Basin were 80 percent of median

Above normal (110 to 115 percent) snowmelt streamflow volumes are expected across almost all major basins across Wyoming.  Above average streamflow volumes are expected across the Wind, Shoshone, Upper Yellowstone, Upper Green, and Sweetwater Watersheds.  The Powder, Tongue, Upper Yellowstone, and Little Snake Basins are forecasted to have below to near normal streamflow volumes during the upcoming snowmelt season.

Reservoirs storages across Wyoming are above average at 115 to 125 percent for January. 

The latest Wyoming water supply outlook graphic: