Wyoming – NRCS

Report #18                                   Weekly Snow Report                             Apr 15, 2024

 

Good day to all. This is the 18th Snow Report for Water Year 2024 (2023-2024 snow season). Currently the state’s SNOTELs are reading 92% of median with a basin high of 111% and a basin low of 21%. Last year the state was at 124%, and at 85% in 2022. 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	4/15/2024	4/8/2024	4/1/2024	4/15/2023	4/15/2022
Snake	95	100	100	120	82
Madison	85	89	91	136	74
Yellowstone	76	82	83	109	82
Wind	96	109	112	115	91
Bighorn	88	95	90	103	89
Shoshone	82	91	96	103	80
Powder	75	83	70	111	91
Tongue	74	77	75	104	94
Belle Fourche	21	37	39	140	71
Cheyenne	27	40	37	122	61
Upper North Platte	98	103	105	123	89
Sweetwater	99	112	116	140	79
Lower North Platte	81	87	79	119	92
Laramie	102	106	110	111	100
South Platte	84	93	92	86	95
Little Snake	108	115	118	155	89
Upper Green	87	95	96	114	82
Lower Green	102	115	119	148	83
Upper Bear	111	125	121	163	84
Statewide SNOTEL Percent of Median	92	99	100	124	85
Weighted State Average (Area)	83	91	90	120	85
Minimum	21	37	37	86	61
Maximum	111	125	121	163	100

 

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