Graph of Percent Average Snow Water Equivalent
Wyoming Basins

For percentages for individual SnoTels, see either the Map or the Station Listing with Charts

Updated Thursday, 21 May 2026

Percent of Average Key
< 25 25 to 50 50 to 75 75 to 90 90 to 110
110 < 125 125 to 150 150 to 175 175 to 200 > 200

BasinSWE (% of Average)
Snake River42
Upper Yellowstone-Madison45
Wind River81
Bighorn35
Shoshone54
Powder-Tongue68
Belle Fourche6
Upper North Platte River23
Lower North Platte - Sweetwater - Laramie0
Little Snake River0
Upper Green River33
Lower Green River12
Upper Bear River85
South Platte River17

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