The snow water equivalent update for this week shows the statewide snowpack at 86% of median, down 2 percentage points from a week ago.

One year ago the state median was 101-103%, up from the median at the same time in 2019.

The Powder watershed has the highest snow water equivalent (SWE) in the state, at 109% — down from 110% last week and 111% a year ago. 

The Lower North Platte is at 107% of median — down from 108% a week ago and lower than the 125% registered one year ago.

The Belle Fourche and Cheyenne basins are tied for the state low at 42% and of median, respectively. Belle Fourche was at 44% a week ago, while  the Cheyenne was at 44%. That rate is signifigantly lower than the 69% logged a year ago for the Cheyenne and 86% for the Belle Fourche. This is the fourth consecutive week that Belle Fourche has been or tied for the state low. 

The Yellowstone drainage is at 97% of median, down 3% from the prior week and also down from 112% of median from the same date one year ago.

The Shoshone River basin is at 91%, down from 92% last week and also down from 105% a year ago. The Bighorn River basin is at 96%, up from 92% last week, and down from 86% last year. The Madison, Wind, Bighorn, Tounge and South Platte basins all showed an increase from last week.

The Wind River is at 83% (up from 81% last week), the Tongue is at 101% (up from 98%); the Sweetwater is at 68% (down from 70 %); The Upper North Platte is at 85%, down from 90% last week; the Laramie is at 99%, but down from 103% a week ago; the Little Snake is at 84% (down from 89%);  the Upper Green is at 75%, down from 79% last week; the Lower Green is at 81%, down from 86% a week ago; the Upper Bear is at 68% but down from 71% a week ago; and the South Platte is at 69% (up from 66%). 

All mountain areas across north central and southern Wyoming are expected to see moderate snow amounts during the upcoming week.