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 | 17 Dec 2025 | 1.57 | 74 | 0.70 | 0.97 | 1.34 | 2.13 | 2.43 | 3.31 | 5.20 | 1.40 | 66 |
| Bighorn | 17 Dec 2025 | 2.94 | 74 | 2.28 | 2.85 | 3.43 | 3.95 | 4.36 | 5.57 | 6.17 | 2.81 | 71 |
| Cheyenne | 17 Dec 2025 | 1.55 | 65 | 0.85 | 1.14 | 1.65 | 2.40 | 2.68 | 3.62 | 5.20 | 1.40 | 58 |
| Laramie | 17 Dec 2025 | 2.76 | 56 | 2.45 | 3.06 | 4.11 | 4.91 | 5.48 | 7.14 | 13.18 | 3.13 | 64 |
| Little Snake | 17 Dec 2025 | 4.22 | 73 | 2.80 | 3.98 | 4.93 | 5.75 | 6.49 | 7.53 | 11.63 | 4.11 | 71 |
| Lower Green | 17 Dec 2025 | 2.72 | 74 | 1.76 | 2.89 | 3.21 | 3.70 | 4.43 | 5.56 | 7.30 | 3.22 | 87 |
| Lower North Platte | 17 Dec 2025 | 1.10 | 31 | 0.80 | 2.04 | 2.81 | 3.55 | 4.41 | 5.96 | 8.70 | 2.42 | 68 |
| Madison | 17 Dec 2025 | 3.08 | 48 | 2.27 | 4.43 | 5.16 | 6.42 | 8.16 | 10.59 | 13.45 | 5.00 | 78 |
| Powder | 17 Dec 2025 | 2.21 | 71 | 1.86 | 2.28 | 2.70 | 3.13 | 3.61 | 4.91 | 5.43 | 2.00 | 64 |
| Shoshone | 17 Dec 2025 | 4.97 | 78 | 3.07 | 4.74 | 5.76 | 6.40 | 7.65 | 9.30 | 13.15 | 3.40 | 53 |
| Snake | 17 Dec 2025 | 5.14 | 75 | 4.39 | 4.94 | 5.75 | 6.82 | 7.93 | 10.02 | 12.03 | 4.70 | 69 |
| South Platte | 17 Dec 2025 | 0.30 | 9 | 0.00 | 0.31 | 1.33 | 3.20 | 3.20 | 4.17 | 5.20 | 0.40 | 12 |
| Sweetwater | 17 Dec 2025 | 2.10 | 50 | 2.45 | 3.10 | 3.52 | 4.23 | 5.16 | 6.63 | 10.00 | 3.27 | 77 |
| Tongue | 17 Dec 2025 | 2.23 | 62 | 1.94 | 2.82 | 3.46 | 3.61 | 4.56 | 5.56 | 7.70 | 2.73 | 76 |
| Upper Bear | 17 Dec 2025 | 2.88 | 61 | 2.72 | 3.44 | 4.11 | 4.72 | 6.34 | 7.98 | 11.45 | 3.40 | 72 |
| Upper Green | 17 Dec 2025 | 3.84 | 77 | 3.20 | 3.53 | 4.08 | 4.96 | 5.60 | 7.42 | 10.71 | 3.51 | 71 |
| Upper North Platte | 17 Dec 2025 | 4.83 | 69 | 4.47 | 5.10 | 6.00 | 7.01 | 8.05 | 10.67 | 16.06 | 4.95 | 71 |
| Wind | 17 Dec 2025 | 2.93 | 64 | 2.39 | 3.63 | 4.23 | 4.59 | 5.19 | 7.01 | 8.91 | 3.17 | 69 |
| Yellowstone | 17 Dec 2025 | 6.92 | 96 | 3.98 | 5.32 | 6.33 | 7.22 | 8.06 | 10.32 | 14.27 | 4.40 | 61 |