Supercell over Laramie
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Wyoming
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. (Wed, 22 Apr 2026)

Red indicates earlier peak date or lower SWE compared to median

Blue indicates later peak date or higher SWE compared to median

Click Column Headers to Sort

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 Fourche16 Mar 20263.93-12-2.957%28 Mar 6.87 0.0301 May
Bighorn17 Mar 20267.67-38-4.165%24 Apr 11.74 6.1821 Jun
Cheyenne02 Mar 20264.25-25-3.257%28 Mar 7.50 0.0001 May
Laramie17 Mar 20268.21-29-7.752%15 Apr 15.90 2.1713 Jun
Little Snake09 Mar 202612.35-27-8.260%06 Apr 20.50 4.7419 Jun
Lower Green16 Mar 20268.86-23-4.765%08 Apr 13.58 3.1712 Jun
Lower North Platte17 Mar 20265.15-28-7.640%14 Apr 12.75 0.3529 May
Madison17 Mar 202614.88-27-6.171%13 Apr 20.98 10.8625 Jun
Powder17 Mar 20266.30-28-4.359%14 Apr 10.61 1.5410 Jun
Shoshone17 Mar 202615.93-37-2.189%23 Apr 17.98 11.8827 Jun
Snake17 Mar 202618.05-25-2.886%11 Apr 20.89 10.5729 Jun
South Platte07 Mar 20260.70-21-5.611%29 Mar 6.30 0.1025 Apr
Sweetwater17 Mar 202610.73-32-4.371%18 Apr 15.03 4.3706 Jun
Tongue17 Mar 20266.47-45-6.849%01 May 13.30 5.1210 Jun
Upper Bear09 Mar 202612.03-30-5.868%09 Apr 17.81 4.6316 Jun
Upper Green18 Mar 202613.41-24-2.684%11 Apr 15.96 6.6416 Jun
Upper North Platte17 Mar 202613.87-30-10.557%16 Apr 24.35 7.7629 Jun
Wind17 Mar 202611.37-34-2.681%20 Apr 13.97 6.2425 Jun
Yellowstone in WY18 Mar 202620.71-37-0.1100%24 Apr 20.81 18.5201 Jul
Data from Natural Resources Conservation Service SnoTel Network