Wyoming – NRCS

Report #20                                   Weekly Snow Report                             Apr 27, 2026

 

Good day to all. This is the 20th Snow Report for Water Year 2026 (2025-2026 snow season). Currently the state’s SNOTELs are reading 47% of median with a basin high of 92% and a basin low of 6%. Last year the state was at 87%, and at 83% in 2024. The map may differ slightly from the table depending upon how many stations were reporting at the time. This report and a map displaying basin SWE percentages of median for the state may be found at: http://www.wrds.uwyo.edu/wrds/nrcs/nrcs.html.

 

For information on the use of median vs. average go to http://www.wcc.nrcs.usda.gov/normals/median_average.htm

 

SNOW WATER EQUIVALENT AS PERCENT OF MEDIAN. The following table shows the percent of median for today, the 2 previous weeks, one year ago, and two years ago for Wyoming basins. Normal (median) is based on all reporting SNOTEL sites in the basin with calculated medians (newer SNOTEL sites do not have medians figured), but does not include manually measured snow courses. The statewide SNOTEL percent of median is calculated by averaging medians for all stations associated with Wyoming basins. The weighted state average is figured using the area of basins (square miles). The reference period for computing medians is the 30-year period 1991 through 2020.

Basin	4/27/2026	4/20/2026	4/13/2026	4/27/2025	4/27/2024
Snake	59	58	60	96	83
Madison	62	57	52	84	77
Yellowstone	92	88	88	96	73
Wind	55	55	56	99	93
Bighorn	67	65	62	89	91
Shoshone	66	68	67	88	79
Powder	29	29	27	59	66
Tongue	44	52	56	98	74
Belle Fourche	6	1	0	0	0
Cheyenne	7	1	0	0	0
Upper North Platte	34	38	37	82	93
Sweetwater	40	41	44	88	89
Lower North Platte	6	6	8	63	63
Laramie	10	22	23	75	97
South Platte	*	3	2	*	*
Little Snake	30	31	28	74	92
Upper Green	51	49	54	103	75
Lower Green	32	32	31	76	82
Upper Bear	37	38	37	83	95
Statewide SNOTEL Percent of Median	47	48	46	87	83
Weighted State Average (Area)	37	37	36	71	70
Minimum	6	1	0	0	0
Maximum	92	88	88	103	97

 

red = down       blue = up      green = same       * Basin SWE values, close to dates of first measurable                                                                                                                      snowfall and melt-out, can be irregular or erratic

 

For more info contact:

 

Jeff Coyle Jeffrey.Coyle@usda.gov

(307) 233-6787

NRCS Snow Survey

100 East B St., Room 3124

Casper, WY 82601

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