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 | 06 Dec 2025 | 1.07 | 59 | 0.27 | 0.58 | 1.15 | 1.80 | 1.85 | 2.99 | 3.70 | 0.27 | 15 |
| Bighorn | 06 Dec 2025 | 1.85 | 54 | 1.69 | 2.43 | 2.88 | 3.41 | 3.71 | 4.96 | 5.56 | 2.25 | 66 |
| Cheyenne | 06 Dec 2025 | 1.05 | 52 | 0.40 | 0.79 | 1.32 | 2.00 | 2.04 | 3.30 | 3.90 | 0.40 | 20 |
| Laramie | 06 Dec 2025 | 1.51 | 39 | 1.70 | 2.36 | 3.26 | 3.91 | 4.72 | 6.25 | 12.30 | 2.87 | 73 |
| Little Snake | 06 Dec 2025 | 3.12 | 70 | 1.98 | 2.67 | 3.48 | 4.44 | 5.50 | 6.25 | 10.50 | 3.58 | 81 |
| Lower Green | 06 Dec 2025 | 2.16 | 76 | 1.30 | 2.08 | 2.58 | 2.84 | 3.63 | 4.18 | 6.66 | 2.61 | 92 |
| Lower North Platte | 06 Dec 2025 | 0.90 | 32 | 0.50 | 1.35 | 2.15 | 2.80 | 3.96 | 5.14 | 7.38 | 2.25 | 80 |
| Madison | 06 Dec 2025 | 2.14 | 44 | 1.57 | 3.20 | 3.85 | 4.84 | 6.48 | 8.45 | 10.74 | 3.60 | 74 |
| Powder | 06 Dec 2025 | 1.34 | 52 | 1.26 | 1.76 | 2.48 | 2.56 | 3.02 | 4.22 | 5.30 | 1.50 | 59 |
| Shoshone | 06 Dec 2025 | 3.55 | 65 | 2.07 | 3.21 | 4.67 | 5.47 | 6.70 | 7.92 | 11.53 | 2.48 | 45 |
| Snake | 06 Dec 2025 | 3.50 | 66 | 2.75 | 3.27 | 4.27 | 5.34 | 6.85 | 7.97 | 11.32 | 2.97 | 56 |
| South Platte | 06 Dec 2025 | 0.40 | 19 | 0.00 | 0.01 | 0.99 | 2.10 | 2.65 | 3.87 | 4.80 | 0.60 | 29 |
| Sweetwater | 06 Dec 2025 | 2.03 | 61 | 1.45 | 2.33 | 3.08 | 3.33 | 4.20 | 5.03 | 7.05 | 2.40 | 72 |
| Tongue | 06 Dec 2025 | 1.29 | 41 | 1.41 | 2.39 | 2.85 | 3.14 | 4.04 | 4.86 | 5.95 | 2.37 | 75 |
| Upper Bear | 06 Dec 2025 | 2.01 | 58 | 1.37 | 2.27 | 3.28 | 3.49 | 4.89 | 6.31 | 10.49 | 2.54 | 73 |
| Upper Green | 06 Dec 2025 | 2.64 | 70 | 2.15 | 2.53 | 3.47 | 3.77 | 4.99 | 6.28 | 10.58 | 2.29 | 61 |
| Upper North Platte | 06 Dec 2025 | 3.21 | 56 | 3.12 | 3.65 | 4.87 | 5.72 | 6.73 | 9.13 | 14.98 | 4.41 | 77 |
| Wind | 06 Dec 2025 | 2.33 | 61 | 1.55 | 2.79 | 3.48 | 3.82 | 4.59 | 6.05 | 7.60 | 2.44 | 64 |
| Yellowstone | 06 Dec 2025 | 4.60 | 77 | 2.20 | 3.84 | 4.90 | 5.95 | 7.06 | 8.57 | 12.05 | 3.16 | 53 |