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 | 02 Dec 2025 | 0.60 | 37 | 0.27 | 0.65 | 0.96 | 1.60 | 1.87 | 3.07 | 3.55 | 0.27 | 17 |
| Bighorn | 02 Dec 2025 | 1.51 | 48 | 1.65 | 2.34 | 2.74 | 3.12 | 3.57 | 4.70 | 5.32 | 2.25 | 72 |
| Cheyenne | 02 Dec 2025 | 0.65 | 36 | 0.40 | 0.80 | 1.15 | 1.80 | 1.90 | 3.34 | 3.80 | 0.40 | 22 |
| Laramie | 02 Dec 2025 | 0.72 | 20 | 1.27 | 2.16 | 2.94 | 3.61 | 4.16 | 5.80 | 11.35 | 2.90 | 80 |
| Little Snake | 02 Dec 2025 | 1.52 | 38 | 1.82 | 2.21 | 2.93 | 4.04 | 4.73 | 5.75 | 9.10 | 3.56 | 88 |
| Lower Green | 02 Dec 2025 | 1.51 | 58 | 1.11 | 1.74 | 2.27 | 2.61 | 3.32 | 3.93 | 6.07 | 2.62 | 100 |
| Lower North Platte | 02 Dec 2025 | 0.47 | 19 | 0.50 | 1.20 | 2.00 | 2.52 | 3.66 | 4.76 | 6.42 | 2.15 | 85 |
| Madison | 02 Dec 2025 | 1.42 | 32 | 1.45 | 2.70 | 3.60 | 4.42 | 5.83 | 7.68 | 9.85 | 3.60 | 81 |
| Powder | 02 Dec 2025 | 1.09 | 46 | 1.07 | 1.57 | 2.30 | 2.37 | 2.77 | 4.11 | 5.28 | 1.50 | 63 |
| Shoshone | 02 Dec 2025 | 2.48 | 51 | 1.48 | 2.86 | 4.38 | 4.90 | 6.05 | 7.25 | 10.67 | 2.47 | 50 |
| Snake | 02 Dec 2025 | 2.42 | 50 | 2.29 | 2.89 | 3.89 | 4.86 | 6.00 | 7.31 | 9.93 | 2.95 | 61 |
| South Platte | 02 Dec 2025 | 0.20 | 14 | 0.00 | 0.01 | 1.00 | 1.40 | 2.24 | 3.48 | 4.50 | 0.70 | 50 |
| Sweetwater | 02 Dec 2025 | 1.57 | 50 | 0.87 | 2.04 | 2.87 | 3.13 | 3.84 | 4.60 | 7.05 | 2.40 | 77 |
| Tongue | 02 Dec 2025 | 0.81 | 28 | 1.34 | 2.07 | 2.68 | 2.89 | 3.76 | 4.82 | 5.45 | 2.37 | 82 |
| Upper Bear | 02 Dec 2025 | 1.32 | 42 | 1.29 | 1.92 | 2.79 | 3.17 | 4.33 | 5.64 | 9.31 | 2.52 | 79 |
| Upper Green | 02 Dec 2025 | 1.86 | 53 | 1.62 | 2.16 | 3.02 | 3.48 | 4.55 | 5.98 | 9.46 | 2.28 | 66 |
| Upper North Platte | 02 Dec 2025 | 1.91 | 36 | 2.63 | 3.25 | 4.49 | 5.27 | 6.13 | 8.36 | 13.33 | 4.41 | 84 |
| Wind | 02 Dec 2025 | 1.79 | 51 | 1.44 | 2.49 | 3.19 | 3.54 | 4.36 | 5.52 | 7.27 | 2.44 | 69 |
| Yellowstone | 02 Dec 2025 | 3.45 | 63 | 1.69 | 3.41 | 4.50 | 5.45 | 6.41 | 7.46 | 11.15 | 3.12 | 57 |