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 | 18 Feb 2026 | 3.20 | 62 | 2.60 | 3.60 | 4.57 | 5.20 | 5.55 | 6.78 | 9.60 | 4.53 | 87 |
| Bighorn | 18 Feb 2026 | 5.55 | 76 | 5.13 | 5.74 | 6.68 | 7.29 | 8.00 | 9.28 | 10.95 | 7.31 | 100 |
| Cheyenne | 18 Feb 2026 | 3.85 | 69 | 2.70 | 4.03 | 4.75 | 5.60 | 6.03 | 7.51 | 9.60 | 4.50 | 80 |
| Laramie | 18 Feb 2026 | 5.94 | 56 | 5.67 | 8.45 | 9.37 | 10.63 | 11.37 | 13.78 | 18.10 | 10.40 | 98 |
| Little Snake | 18 Feb 2026 | 10.20 | 69 | 9.00 | 11.24 | 12.94 | 14.88 | 16.49 | 18.83 | 24.78 | 14.72 | 99 |
| Lower Green | 18 Feb 2026 | 6.63 | 78 | 6.79 | 7.30 | 7.88 | 8.52 | 9.77 | 11.84 | 15.57 | 9.74 | 114 |
| Lower North Platte | 18 Feb 2026 | 2.52 | 33 | 4.05 | 5.38 | 6.78 | 7.53 | 8.84 | 9.85 | 14.05 | 6.30 | 84 |
| Madison | 18 Feb 2026 | 12.72 | 88 | 5.80 | 10.94 | 12.93 | 14.50 | 17.19 | 22.67 | 30.76 | 13.84 | 95 |
| Powder | 18 Feb 2026 | 4.41 | 69 | 3.89 | 5.17 | 5.70 | 6.37 | 7.18 | 8.05 | 9.68 | 5.21 | 82 |
| Shoshone | 18 Feb 2026 | 12.60 | 100 | 7.23 | 10.00 | 11.36 | 12.58 | 13.94 | 18.86 | 23.75 | 12.37 | 98 |
| Snake | 18 Feb 2026 | 13.88 | 89 | 9.96 | 11.18 | 13.80 | 15.59 | 16.93 | 21.70 | 28.52 | 16.94 | 109 |
| South Platte | 18 Feb 2026 | 0.20 | 3 | 1.40 | 2.44 | 3.39 | 5.80 | 6.38 | 7.00 | 8.70 | 2.80 | 48 |
| Sweetwater | 18 Feb 2026 | 8.27 | 91 | 6.17 | 7.16 | 8.05 | 9.10 | 10.63 | 13.97 | 20.47 | 10.30 | 113 |
| Tongue | 18 Feb 2026 | 4.01 | 54 | 4.56 | 6.16 | 7.23 | 7.43 | 8.45 | 9.57 | 12.32 | 7.20 | 97 |
| Upper Bear | 18 Feb 2026 | 8.92 | 76 | 7.58 | 9.05 | 10.16 | 11.76 | 14.38 | 18.67 | 24.38 | 12.70 | 108 |
| Upper Green | 18 Feb 2026 | 10.49 | 93 | 7.46 | 9.08 | 10.25 | 11.24 | 12.72 | 17.86 | 23.38 | 12.79 | 114 |
| Upper North Platte | 18 Feb 2026 | 10.99 | 69 | 10.51 | 13.09 | 14.64 | 16.01 | 18.01 | 20.26 | 26.33 | 16.61 | 104 |
| Wind | 18 Feb 2026 | 8.57 | 100 | 6.21 | 7.32 | 8.35 | 8.59 | 9.98 | 12.76 | 15.90 | 9.36 | 109 |
| Yellowstone | 18 Feb 2026 | 16.73 | 109 | 9.18 | 11.34 | 13.24 | 15.28 | 16.60 | 20.18 | 28.48 | 14.53 | 95 |