Wyoming – NRCS

Report #19                                   Weekly Snow Report                             Apr 20, 2026

 

Good day to all. This is the 19th Snow Report for Water Year 2026 (2025-2026 snow season). Currently the state’s SNOTELs are reading 48% of median with a basin high of 88% and a basin low of 1%. Last year the state was at 89%, and at 91% 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	4/20/2026	4/13/2026	4/6/2026	4/20/2025	4/20/2024
Snake	58	60	68	101	98
Madison	57	52	59	97	87
Yellowstone	88	88	95	99	80
Wind	55	56	72	94	101
Bighorn	65	62	66	87	93
Shoshone	68	67	71	94	89
Powder	29	27	39	66	85
Tongue	52	56	54	91	77
Belle Fourche	1	0	0	23	40
Cheyenne	1	0	0	6	39
Upper North Platte	38	37	44	91	101
Sweetwater	41	44	52	89	105
Lower North Platte	6	8	15	69	87
Laramie	22	23	34	84	105
South Platte	3	2	2	2	94
Little Snake	31	28	34	81	113
Upper Green	49	54	62	98	93
Lower Green	32	31	33	88	108
Upper Bear	38	37	43	88	118
Statewide SNOTEL Percent of Median	48	46	54	89	91
Weighted State Average (Area)	37	36	43	76	89
Minimum	1	0	0	2	39
Maximum	88	88	95	101	118

 

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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