Wyoming – NRCS

Report #20                                   Weekly Snow Report                             Apr 28, 2025

 

Good day to all. This is the 20^th Snow Report for Water Year 2025 (2024-2025 snow season). Currently the state’s SNOTELs are reading 86% of median with a basin high of 103% and a basin low of 0%. Last year the state was at 85%, and at 136% in 2023. 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	4/28/2025	4/21/2025	4/14/2025	4/28/2024	4/28/2023
Snake	97	98	100	84	128
Madison	82	88	96	77	137
Yellowstone	97	95	98	72	113
Wind	100	95	95	97	128
Bighorn	88	88	87	91	109
Shoshone	89	85	93	79	103
Powder	56	62	64	65	118
Tongue	97	95	91	75	113
Belle Fourche	0	13	19	0	300
Cheyenne	0	1	1	0	203
Upper North Platte	81	89	90	94	130
Sweetwater	90	86	88	96	172
Lower North Platte	59	73	68	63	138
Laramie	72	84	84	101	117
South Platte	0	3	0	89	189
Little Snake	73	80	81	93	185
Upper Green	103	98	97	77	132
Lower Green	75	87	87	84	178
Upper Bear	82	90	87	96	195
Statewide SNOTEL Percent of Median	86	89	90	85	136
Weighted State Average (Area)	70	74	75	73	147
Minimum	0	1	0	0	103
Maximum	103	98	100	101	300

 

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