Supercell over Laramie
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Peak Snow Water Equivalent Dates and Totals by Basin With Meltout Dates

This year's "to-date" peak snow water equivalent (SWE) compared to median.

Red indicates earlier peak date or lower SWE compared to median

Blue indicates later peak date or higher SWE compared to median

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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 Fourche25 Mar 20255.20-3-1.776%28 Mar 6.87 0.0701 May
Bighorn06 Apr 202510.68-18-1.191%24 Apr 11.74 9.2421 Jun
Cheyenne11 Mar 20254.90-17-2.665%28 Mar 7.50 0.0501 May
Laramie07 Apr 202513.46-8-2.485%15 Apr 15.90 11.1113 Jun
Little Snake07 Apr 202518.481-2.488%06 Apr 20.90 13.1820 Jun
Lower Green06 Apr 202512.80-2-1.092%08 Apr 13.84 8.5913 Jun
Lower North Platte07 Apr 20259.28-7-3.573%14 Apr 12.75 7.1529 May
Madison09 Apr 202519.62-5-2.290%14 Apr 21.80 16.8625 Jun
Powder24 Mar 20257.76-21-2.873%14 Apr 10.61 5.4310 Jun
Shoshone25 Mar 202517.17-30-0.995%24 Apr 18.08 15.2029 Jun
Snake06 Apr 202522.55-51.7108%11 Apr 20.85 20.0729 Jun
South Platte20 Mar 20253.30-12-3.350%01 Apr 6.60 0.0026 Apr
Sweetwater25 Mar 202513.47-24-1.690%18 Apr 15.03 11.0006 Jun
Tongue07 Apr 202511.10-21-2.283%28 Apr 13.30 10.6409 Jun
Upper Bear06 Apr 202516.40-3-1.492%09 Apr 17.81 11.7515 Jun
Upper Green07 Apr 202516.47-40.5103%11 Apr 15.96 14.4819 Jun
Upper North Platte07 Apr 202521.98-9-2.490%16 Apr 24.35 19.2928 Jun
Wind07 Apr 202513.24-13-0.795%20 Apr 13.97 12.0425 Jun
Yellowstone24 Apr 202520.8910.1100%23 Apr 20.79 20.8901 Jul
Data from Natural Resources Conservation Service SnoTel Network