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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

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 Fourche 1.57 261 -5.3 23% 28 Mar 6.87 01 May

Bighorn 2.93 233 -8.8 25% 24 Apr 11.74 21 Jun

Cheyenne 1.60 261 -5.9 21% 28 Mar 7.50 01 May

Laramie 3.01 243 -12.9 19% 15 Apr 15.90 13 Jun

Little Snake 4.31 251 -16.2 21% 06 Apr 20.50 19 Jun

Lower Green 2.74 247 -10.8 20% 08 Apr 13.58 12 Jun

Lower North Platte 1.15 241 -11.6 9% 14 Apr 12.75 29 May

Madison 3.02 244 -18.0 14% 13 Apr 20.98 25 Jun

Powder 2.20 243 -8.4 21% 14 Apr 10.61 10 Jun

Shoshone 5.00 234 -13.0 28% 23 Apr 17.98 27 Jun

Snake 5.20 244 -15.7 25% 11 Apr 20.89 29 Jun

South Platte 0.60 254 -5.7 10% 29 Mar 6.30 25 Apr

Sweetwater 2.33 233 -12.7 16% 18 Apr 15.03 06 Jun

Tongue 2.33 226 -11.0 18% 01 May 13.30 10 Jun

Upper Bear 2.84 248 -15.0 16% 09 Apr 17.81 16 Jun

Upper Green 3.91 244 -12.1 24% 11 Apr 15.96 16 Jun

Upper North Platte 4.92 241 -19.4 20% 16 Apr 24.35 29 Jun

Wind 2.98 235 -11.0 21% 20 Apr 13.97 25 Jun

Yellowstone 6.94 233 -13.9 33% 24 Apr 20.81 01 Jul

Data from Natural Resources Conservation Service SnoTel Network

Water Resources Data System & State Climate Office

Water Resources Data System & State Climate Office

Water Resources Data System & State Climate Office

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

Click Column Headers to Sort

Basin Click to View Chart	This Year Peak SWE (inches)	Days Early/Late	Peak SWE Dif (inches)	Percent of Median Peak SWE	Median Peak Date	Median Peak SWE (inches)	Median Meltout Date
Belle Fourche	1.57	261	-5.3	23%	28 Mar	6.87	01 May
Bighorn	2.93	233	-8.8	25%	24 Apr	11.74	21 Jun
Cheyenne	1.60	261	-5.9	21%	28 Mar	7.50	01 May
Laramie	3.01	243	-12.9	19%	15 Apr	15.90	13 Jun
Little Snake	4.31	251	-16.2	21%	06 Apr	20.50	19 Jun
Lower Green	2.74	247	-10.8	20%	08 Apr	13.58	12 Jun
Lower North Platte	1.15	241	-11.6	9%	14 Apr	12.75	29 May
Madison	3.02	244	-18.0	14%	13 Apr	20.98	25 Jun
Powder	2.20	243	-8.4	21%	14 Apr	10.61	10 Jun
Shoshone	5.00	234	-13.0	28%	23 Apr	17.98	27 Jun
Snake	5.20	244	-15.7	25%	11 Apr	20.89	29 Jun
South Platte	0.60	254	-5.7	10%	29 Mar	6.30	25 Apr
Sweetwater	2.33	233	-12.7	16%	18 Apr	15.03	06 Jun
Tongue	2.33	226	-11.0	18%	01 May	13.30	10 Jun
Upper Bear	2.84	248	-15.0	16%	09 Apr	17.81	16 Jun
Upper Green	3.91	244	-12.1	24%	11 Apr	15.96	16 Jun
Upper North Platte	4.92	241	-19.4	20%	16 Apr	24.35	29 Jun
Wind	2.98	235	-11.0	21%	20 Apr	13.97	25 Jun
Yellowstone	6.94	233	-13.9	33%	24 Apr	20.81	01 Jul