Wyoming – NRCS

Report #20                                   Weekly Snow Report                             Apr 29, 2024

 

Good day to all. This is the 20th Snow Report for Water Year 2024 (2023-2024 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 136%, and at 93% 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	4/29/2024	4/22/2024	4/15/2024	4/29/2023	4/29/2022
Snake	86	90	95	128	92
Madison	81	84	85	140	83
Yellowstone	73	75	76	112	94
Wind	98	94	96	128	103
Bighorn	91	97	88	108	102
Shoshone	85	81	82	102	90
Powder	66	81	75	118	105
Tongue	77	78	74	113	115
Belle Fourche	0	18	21	379	214
Cheyenne	0	26	27	342	158
Upper North Platte	95	99	98	130	93
Sweetwater	96	92	99	174	84
Lower North Platte	63	82	81	140	105
Laramie	103	103	102	118	98
South Platte	88	93	84	188	0
Little Snake	92	103	108	182	91
Upper Green	79	80	87	133	95
Lower Green	86	94	102	178	74
Upper Bear	96	109	111	193	87
Statewide SNOTEL Percent of Median	86	90	92	136	93
Weighted State Average (Area)	74	82	83	161	103
Minimum	0	18	21	102	0
Maximum	103	109	111	379	214

 

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