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 | 05 Dec 2025 | 0.00 | 0 | 0.27 | 0.53 | 1.14 | 1.73 | 1.85 | 3.02 | 3.65 | 0.27 | 16 |
| Bighorn | 05 Dec 2025 | 0.00 | 0 | 1.69 | 2.42 | 2.88 | 3.35 | 3.67 | 4.92 | 5.52 | 2.25 | 67 |
| Cheyenne | 05 Dec 2025 | 0.00 | 0 | 0.40 | 0.79 | 1.29 | 2.00 | 2.06 | 3.34 | 3.85 | 0.40 | 20 |
| Laramie | 05 Dec 2025 | 0.00 | 0 | 1.57 | 2.30 | 3.20 | 3.83 | 4.63 | 6.09 | 12.28 | 2.90 | 76 |
| Little Snake | 05 Dec 2025 | 0.00 | 0 | 1.95 | 2.67 | 3.43 | 4.31 | 5.23 | 6.08 | 10.38 | 3.58 | 83 |
| Lower Green | 05 Dec 2025 | 0.00 | 0 | 1.27 | 2.08 | 2.54 | 2.81 | 3.57 | 4.13 | 6.64 | 2.62 | 93 |
| Lower North Platte | 05 Dec 2025 | 0.00 | 0 | 0.50 | 1.34 | 2.15 | 2.70 | 3.93 | 5.12 | 7.22 | 2.23 | 83 |
| Madison | 05 Dec 2025 | 0.00 | 0 | 1.45 | 3.19 | 3.85 | 4.80 | 6.29 | 8.40 | 10.44 | 3.60 | 75 |
| Powder | 05 Dec 2025 | 0.00 | 0 | 1.26 | 1.76 | 2.45 | 2.53 | 3.01 | 4.25 | 5.30 | 1.50 | 59 |
| Shoshone | 05 Dec 2025 | 0.00 | 0 | 2.07 | 3.21 | 4.53 | 5.32 | 6.42 | 7.79 | 11.35 | 2.48 | 47 |
| Snake | 05 Dec 2025 | 0.00 | 0 | 2.73 | 3.21 | 4.26 | 5.26 | 6.63 | 7.77 | 11.28 | 2.97 | 56 |
| South Platte | 05 Dec 2025 | 0.00 | 0 | 0.00 | 0.01 | 0.96 | 1.90 | 2.18 | 3.69 | 4.70 | 0.60 | 32 |
| Sweetwater | 05 Dec 2025 | 0.00 | 0 | 1.40 | 2.28 | 3.08 | 3.33 | 4.18 | 4.94 | 7.15 | 2.40 | 72 |
| Tongue | 05 Dec 2025 | 0.00 | 0 | 1.41 | 2.35 | 2.79 | 3.09 | 4.03 | 4.85 | 5.90 | 2.37 | 77 |
| Upper Bear | 05 Dec 2025 | 0.00 | 0 | 1.38 | 2.21 | 3.25 | 3.47 | 4.74 | 6.04 | 10.48 | 2.55 | 73 |
| Upper Green | 05 Dec 2025 | 0.00 | 0 | 2.14 | 2.44 | 3.47 | 3.71 | 4.99 | 6.14 | 10.57 | 2.31 | 62 |
| Upper North Platte | 05 Dec 2025 | 0.00 | 0 | 3.06 | 3.67 | 4.77 | 5.52 | 6.48 | 8.72 | 14.96 | 4.42 | 80 |
| Wind | 05 Dec 2025 | 0.00 | 0 | 1.51 | 2.76 | 3.45 | 3.78 | 4.50 | 6.02 | 7.37 | 2.44 | 65 |
| Yellowstone | 05 Dec 2025 | 0.00 | 0 | 2.18 | 3.82 | 4.87 | 5.83 | 7.02 | 8.53 | 11.88 | 3.15 | 54 |