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 | 25 May 2026 | 0.00 | 0 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.67 | 0.00 | 0 |
| Bighorn | 25 May 2026 | 0.00 | 0 | 0.64 | 1.94 | 4.06 | 4.95 | 7.95 | 11.39 | 17.85 | 4.64 | 94 |
| Cheyenne | 25 May 2026 | 0.00 | 0 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.50 | 0.00 | 0 |
| Laramie | 25 May 2026 | 0.00 | 0 | 0.00 | 1.11 | 4.02 | 5.73 | 9.96 | 13.01 | 24.60 | 3.11 | 54 |
| Little Snake | 25 May 2026 | 0.00 | 0 | 0.63 | 2.43 | 4.13 | 7.06 | 9.61 | 12.84 | 24.02 | 3.75 | 53 |
| Lower Green | 25 May 2026 | 0.00 | 0 | 0.36 | 1.08 | 2.27 | 2.90 | 5.41 | 7.60 | 14.90 | 2.05 | 71 |
| Lower North Platte | 25 May 2026 | 0.00 | 0 | 0.00 | 0.00 | 0.01 | 0.35 | 2.48 | 6.13 | 20.65 | 0.00 | 0 |
| Madison | 25 May 2026 | 0.00 | 0 | 0.00 | 2.12 | 6.68 | 9.92 | 12.19 | 19.08 | 23.88 | 5.92 | 60 |
| Powder | 25 May 2026 | 0.00 | 0 | 0.00 | 0.07 | 1.60 | 2.39 | 4.63 | 8.13 | 14.50 | 1.40 | 59 |
| Shoshone | 25 May 2026 | 0.00 | 0 | 1.57 | 3.70 | 6.96 | 10.18 | 15.65 | 23.01 | 27.26 | 7.65 | 75 |
| Snake | 25 May 2026 | 0.00 | 0 | 0.70 | 3.19 | 5.69 | 9.82 | 11.92 | 19.21 | 28.39 | 8.86 | 90 |
| South Platte | 25 May 2026 | 0.00 | 0 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.30 | 0.00 | 0 |
| Sweetwater | 25 May 2026 | 0.00 | 0 | 0.00 | 0.23 | 2.97 | 5.07 | 8.51 | 18.27 | 21.65 | 2.07 | 41 |
| Tongue | 25 May 2026 | 0.00 | 0 | 0.00 | 0.55 | 2.71 | 4.30 | 8.62 | 13.71 | 18.44 | 5.49 | 128 |
| Upper Bear | 25 May 2026 | 0.00 | 0 | 0.00 | 0.78 | 2.61 | 4.13 | 8.78 | 14.15 | 24.20 | 2.31 | 56 |
| Upper Green | 25 May 2026 | 0.00 | 0 | 0.00 | 1.50 | 3.83 | 5.34 | 7.85 | 15.22 | 21.93 | 4.81 | 90 |
| Upper North Platte | 25 May 2026 | 0.00 | 0 | 2.08 | 5.77 | 9.47 | 12.99 | 17.99 | 22.50 | 37.51 | 9.39 | 72 |
| Wind | 25 May 2026 | 0.00 | 0 | 0.77 | 1.94 | 4.12 | 6.29 | 8.97 | 18.22 | 19.01 | 3.62 | 58 |
| Yellowstone | 25 May 2026 | 0.00 | 0 | 1.36 | 7.10 | 11.12 | 14.76 | 17.43 | 22.27 | 28.91 | 13.39 | 91 |