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 | 09 Dec 2025 | 1.17 | 64 | 0.20 | 0.70 | 1.23 | 1.83 | 2.05 | 2.94 | 3.65 | 0.20 | 11 |
| Bighorn | 09 Dec 2025 | 2.45 | 69 | 1.79 | 2.52 | 3.04 | 3.55 | 3.95 | 5.12 | 5.76 | 2.25 | 63 |
| Cheyenne | 09 Dec 2025 | 1.10 | 52 | 0.30 | 0.94 | 1.47 | 2.10 | 2.24 | 3.27 | 4.20 | 0.30 | 14 |
| Laramie | 09 Dec 2025 | 2.74 | 67 | 1.85 | 2.71 | 3.38 | 4.10 | 4.92 | 6.50 | 12.75 | 2.90 | 71 |
| Little Snake | 09 Dec 2025 | 4.15 | 86 | 2.37 | 2.68 | 3.67 | 4.84 | 5.80 | 6.80 | 10.92 | 3.61 | 75 |
| Lower Green | 09 Dec 2025 | 2.59 | 87 | 1.49 | 2.29 | 2.66 | 2.98 | 3.94 | 4.94 | 7.29 | 2.63 | 88 |
| Lower North Platte | 09 Dec 2025 | 1.02 | 35 | 0.50 | 1.53 | 2.24 | 2.92 | 4.02 | 5.49 | 7.53 | 2.23 | 76 |
| Madison | 09 Dec 2025 | 2.64 | 49 | 2.25 | 3.23 | 4.23 | 5.36 | 6.48 | 8.99 | 11.42 | 3.70 | 69 |
| Powder | 09 Dec 2025 | 1.81 | 66 | 1.33 | 1.76 | 2.55 | 2.74 | 3.16 | 4.27 | 5.30 | 1.51 | 55 |
| Shoshone | 09 Dec 2025 | 4.18 | 73 | 2.42 | 3.38 | 4.88 | 5.73 | 6.88 | 8.65 | 11.73 | 2.68 | 47 |
| Snake | 09 Dec 2025 | 4.49 | 78 | 3.09 | 3.60 | 4.72 | 5.76 | 6.94 | 8.59 | 11.59 | 3.16 | 55 |
| South Platte | 09 Dec 2025 | 0.40 | 19 | 0.00 | 0.01 | 0.99 | 2.10 | 3.04 | 3.88 | 4.90 | 0.50 | 24 |
| Sweetwater | 09 Dec 2025 | 2.30 | 64 | 1.75 | 2.40 | 3.10 | 3.60 | 4.54 | 5.63 | 9.80 | 2.30 | 64 |
| Tongue | 09 Dec 2025 | 1.96 | 60 | 1.53 | 2.52 | 2.88 | 3.24 | 4.23 | 5.01 | 6.40 | 2.37 | 73 |
| Upper Bear | 09 Dec 2025 | 2.59 | 69 | 1.58 | 2.61 | 3.37 | 3.77 | 5.12 | 6.77 | 11.14 | 2.55 | 68 |
| Upper Green | 09 Dec 2025 | 3.46 | 85 | 2.31 | 2.74 | 3.51 | 4.09 | 5.27 | 6.54 | 10.88 | 2.31 | 56 |
| Upper North Platte | 09 Dec 2025 | 4.65 | 77 | 3.40 | 4.09 | 5.19 | 6.06 | 7.19 | 9.67 | 15.32 | 4.44 | 73 |
| Wind | 09 Dec 2025 | 2.78 | 68 | 1.66 | 2.92 | 3.64 | 4.06 | 4.91 | 6.35 | 7.89 | 2.52 | 62 |
| Yellowstone | 09 Dec 2025 | 5.58 | 89 | 2.62 | 4.40 | 5.25 | 6.29 | 7.33 | 9.39 | 12.25 | 3.34 | 53 |