Water Resources Data System & State Climate Office
Water Resources Data System & State Climate Office
Water Resources Data System & State Climate Office



| Basin Click to View Chart | Date | Today SWE (inches) | Today SWE % of Median | Minimum SWE (in) | 10th Percentile (inches) | 30th Percentile Inches | Median (inches) | 70th Percentile (inches) | 90th Percentile (inches) | Maximum (inches) | Last Year SWE (inches) | Last Year SWE % of Median |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Belle Fourche | 03 Apr 2026 | 0.00 | 0 | 0.00 | 1.38 | 4.11 | 6.37 | 7.44 | 8.94 | 9.40 | 4.10 | 64 |
| Bighorn | 03 Apr 2026 | 6.02 | 58 | 7.57 | 8.32 | 9.29 | 10.36 | 11.45 | 12.71 | 15.97 | 10.35 | 100 |
| Cheyenne | 03 Apr 2026 | 0.00 | 0 | 0.00 | 1.71 | 4.21 | 6.75 | 7.54 | 9.03 | 9.55 | 3.60 | 53 |
| Laramie | 03 Apr 2026 | 4.56 | 33 | 8.07 | 10.55 | 13.36 | 13.97 | 15.93 | 19.61 | 25.75 | 13.06 | 93 |
| Little Snake | 03 Apr 2026 | 6.62 | 34 | 9.47 | 14.31 | 17.21 | 19.62 | 22.40 | 24.90 | 31.43 | 18.06 | 92 |
| Lower Green | 03 Apr 2026 | 4.29 | 35 | 6.51 | 9.77 | 10.79 | 12.17 | 14.56 | 16.45 | 17.67 | 12.62 | 104 |
| Lower North Platte | 03 Apr 2026 | 1.15 | 10 | 6.25 | 7.74 | 9.90 | 11.10 | 12.58 | 14.32 | 20.48 | 8.93 | 80 |
| Madison | 03 Apr 2026 | 12.00 | 61 | 10.97 | 13.80 | 17.02 | 19.66 | 23.51 | 28.72 | 36.73 | 19.02 | 97 |
| Powder | 03 Apr 2026 | 2.72 | 30 | 6.21 | 7.15 | 8.26 | 9.06 | 10.21 | 11.46 | 14.77 | 7.20 | 79 |
| Shoshone | 03 Apr 2026 | 11.78 | 72 | 11.02 | 12.34 | 15.24 | 16.38 | 19.85 | 24.50 | 28.42 | 16.98 | 104 |
| Snake | 03 Apr 2026 | 13.85 | 67 | 11.85 | 14.67 | 17.45 | 20.80 | 24.48 | 29.39 | 34.42 | 22.50 | 108 |
| South Platte | 03 Apr 2026 | 0.00 | 0 | 0.00 | 1.51 | 4.56 | 6.30 | 6.79 | 8.96 | 11.40 | 2.40 | 38 |
| Sweetwater | 03 Apr 2026 | 7.23 | 55 | 7.20 | 10.31 | 11.72 | 13.10 | 14.99 | 17.92 | 27.03 | 13.33 | 102 |
| Tongue | 03 Apr 2026 | 5.12 | 49 | 7.71 | 8.52 | 10.03 | 10.47 | 12.46 | 14.28 | 15.53 | 10.66 | 102 |
| Upper Bear | 03 Apr 2026 | 8.14 | 51 | 8.63 | 11.90 | 14.26 | 16.09 | 20.15 | 24.81 | 30.23 | 16.34 | 102 |
| Upper Green | 03 Apr 2026 | 10.32 | 67 | 10.04 | 11.50 | 13.86 | 15.39 | 17.44 | 23.91 | 28.14 | 16.45 | 107 |
| Upper North Platte | 03 Apr 2026 | 9.42 | 43 | 12.85 | 17.10 | 20.76 | 21.89 | 24.61 | 28.43 | 33.71 | 21.58 | 99 |
| Wind | 03 Apr 2026 | 8.96 | 74 | 8.34 | 10.12 | 11.67 | 12.11 | 13.96 | 16.54 | 23.82 | 13.06 | 108 |
| Yellowstone | 03 Apr 2026 | 19.00 | 96 | 12.59 | 15.13 | 16.83 | 19.87 | 22.73 | 27.61 | 33.32 | 19.80 | 100 |