Wyoming – NRCS

Report #18                                   Weekly Snow Report                             Apr 14, 2025

 

Good day to all. This is the 18^th Snow Report for Water Year 2025 (2024-2025 snow season). Currently the state’s SNOTELs are reading 90% of median with a basin high of 100% and a basin low of 0%. Last year the state was at 95%, and at 124% 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	4/14/2025	4/7/2025	3/31/2025	4/14/2024	4/14/2023
Snake	100	108	106	97	120
Madison	96	97	94	88	136
Yellowstone	98	99	99	78	109
Wind	95	108	106	98	114
Bighorn	87	103	100	91	102
Shoshone	93	102	103	86	103
Powder	64	84	77	80	111
Tongue	91	104	99	74	105
Belle Fourche	19	71	58	32	142
Cheyenne	1	53	48	36	123
Upper North Platte	90	99	97	100	122
Sweetwater	88	101	100	103	142
Lower North Platte	68	82	76	85	118
Laramie	84	96	93	103	106
South Platte	0	45	36	84	70
Little Snake	81	94	90	112	156
Upper Green	97	107	105	91	115
Lower Green	87	106	100	105	147
Upper Bear	87	104	99	114	163
Statewide SNOTEL Percent of Median	90	101	98	95	124
Weighted State Average (Area)	75	93	89	86	120
Minimum	0	45	36	32	70
Maximum	100	108	106	114	163

 

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