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 | This Year Peak Date | This Year Peak SWE (inches) | Days Early/Late | Peak SWE Dif (inches) | Percent of Median Peak SWE | Median Peak Date | Median Peak SWE (inches) | Current SWE | Median Meltout Date |
|---|---|---|---|---|---|---|---|---|---|
| Belle Fourche | 0.03 | -171 | -6.8 | 0% | 28 Mar  | 6.80 | 28 Apr | ||
| Bighorn | 0.10 | -198 | -11.6 | 1% | 24 Apr | 11.69 | 20 Jun | ||
| Cheyenne | 0.05 | -171 | -7.4 | 1% | 28 Mar | 7.40 | 26 Apr | ||
| Laramie | 0.19 | -188 | -15.5 | 1% | 14 Apr | 15.73 | 13 Jun | ||
| Little Snake | 0.10 | -180 | -20.4 | 0% | 06 Apr | 20.50 | 19 Jun | ||
| Lower Green | 0.01 | -184 | -13.6 | 0% | 08 Apr | 13.58 | 12 Jun | ||
| Lower North Platte | 0.17 | -186 | -12.2 | 1% | 12 Apr | 12.40 | 29 May | ||
| Madison | 0.12 | -187 | -20.9 | 1% | 13 Apr | 20.98 | 25 Jun | ||
| Powder | 0.09 | -188 | -10.3 | 1% | 14 Apr | 10.44 | 10 Jun | ||
| Shoshone | 0.05 | -197 | -17.9 | 0% | 23 Apr | 17.98 | 27 Jun | ||
| Snake | 0.00 | 105 | -20.9 | 0% | 11 Apr | 20.85 | 28 Jun | ||
| South Platte | 1.20 | -175 | -5.1 | 19% | 01 Apr | 6.30 | 25 Apr | ||
| Sweetwater | 0.07 | -191 | -14.9 | 0% | 17 Apr | 14.93 | 05 Jun | ||
| Tongue | 0.04 | -202 | -13.2 | 0% | 28 Apr | 13.27 | 09 Jun | ||
| Upper Bear | 0.07 | -184 | -16.6 | 0% | 08 Apr | 16.63 | 15 Jun | ||
| Upper Green | 0.27 | -185 | -15.7 | 2% | 11 Apr | 15.96 | 16 Jun | ||
| Upper North Platte | 0.36 | -188 | -23.8 | 1% | 14 Apr | 24.20 | 28 Jun | ||
| Wind | 0.16 | -194 | -13.7 | 1% | 20 Apr | 13.89 | 25 Jun | ||
| Yellowstone in WY | 0.03 | -197 | -20.8 | 0% | 23 Apr | 20.79 | 30 Jun |