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Water Resources Data System
Dept 3943
1000 E. University Ave.
Laramie, WY 82071

wrds@uwyo.edu
Ph (307) 766-6651
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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:

 


Jeff Goats jeff.goats@usda.gov (307) 233-6768


  NRCS Snow Survey

100 East B St., Room 3001

Casper, WY 82601