Wyoming –
NRCS
Report #24 Weekly Snow Report
May 22, 2023
Good day to all. This is the 24th & last Snow
Report for Water Year 2023 (2022-2023 snow season). Currently the state’s
SNOTELs are reading 90% of median with a basin high of 180% and a basin low of 33%.
Last year the state was at 101%, and at 69% in 2021. 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: https://www.nrcs.usda.gov/wps/portal/wcc/home/snowClimateMonitoring/30YearNormals
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 a percent of median using all SNOTEL sites in Wyoming with
calculated medians. 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
|
5/22/2023
|
5/15/2023
|
5/8/2023
|
5/22/2022
|
5/22/2021
|
Snake
|
93
|
113
|
117
|
100
|
50
|
Madison
|
136
|
133
|
131
|
96
|
40
|
Yellowstone
|
80
|
92
|
100
|
113
|
69
|
Wind
|
89
|
110
|
110
|
125
|
87
|
Bighorn
|
46
|
67
|
76
|
123
|
99
|
Shoshone
|
61
|
79
|
84
|
113
|
63
|
Powder
|
55*
|
59
|
81
|
144*
|
130*
|
Tongue
|
33
|
72
|
82
|
152
|
169
|
Belle Fourche
|
*
|
*
|
*
|
*
|
*
|
Cheyenne
|
*
|
*
|
*
|
*
|
*
|
Upper North Platte
|
104
|
114
|
119
|
80
|
74
|
Sweetwater
|
155
|
152
|
185
|
100
|
82
|
Lower North Platte
|
44
|
79
|
109
|
166
|
114
|
Laramie
|
78*
|
98*
|
106
|
56
|
101
|
South Platte
|
*
|
*
|
*
|
*
|
*
|
Little Snake
|
120
|
141
|
158
|
74
|
59
|
Upper Green
|
94
|
106
|
124
|
109
|
53
|
Lower Green
|
141*
|
153*
|
174
|
79*
|
47*
|
Upper Bear
|
180*
|
178
|
196
|
66*
|
27*
|
Statewide SNOTEL Percent
of Median
|
90
|
107
|
117
|
101
|
69
|
Weighted State Average
(Area)
|
85
|
102
|
116
|
112
|
84
|
|
|
|
|
|
|
Minimum
|
33
|
59
|
76
|
56
|
40
|
Maximum
|
180
|
178
|
196
|
166
|
169
|
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: