Wyoming Snow Precipitation Update
United States Natural Resources Water and Climate Center
Department of Conservation Portland, Oregon
Agriculture Service
S N O W - P R E C I P I T A T I O N U P D A T E
Based on Mountain Data from NRCS SNOTEL Sites
As of SUNDAY: APRIL 23 , 2023
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BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Median Median Current Median Med
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WYOMING
SNAKE RIVER
Base Camp 7060 19.6 13.2 148 22.4 22.0 102
Blind Bull Sum 8650 27.3 25.0 109 19.7 19.1 103
Cottonwood Creek 7670 27.0 19.9 136 30.3 26.8 113
East Rim Divide 7930 11.7 9.3 126 12.6 11.8 107
Grand Targhee 9260 49.4 46.7 106 31.2 35.0 89
Granite Creek 6770 18.8 11.9 158 16.2 19.6 83
Grassy Lake 7265 37.4 31.2 120 42.0 37.4 112
Gros Ventre Summit 8750 12.9 13.1 98 11.7 13.6 86
Gunsight Pass 9820 15.3 13.2 116 14.2 15.0 95
Lewis Lake Divide 7850 39.9 32.4 123 42.6 35.4 120
Loomis Park 8240 17.4 13.0 134 17.8 17.4 102
Phillips Bench 8200 30.9 26.6 116 32.0 27.6 116
Salt River Summit 7640 21.6 11.0 196 21.4 17.2 124
Snake River Station 6920 19.2 14.1 136 24.4 23.5 104
Somsen Ranch 6800 -M 6.0 * -M 17.4 *
Spring Creek Divide 9000 30.2 25.6 118 -M 24.8 *
Thumb Divide 7980 21.6 16.7 129 20.5 19.8 104
Togwotee Pass 9580 23.6 24.9 95 22.7 26.1 87
Triple Peak 8500 27.0 20.6 131 27.7 27.1 102
Two Ocean Plateau 9240 34.8 32.7 106 29.3 28.6 102
Willow Creek 8080 39.6 28.2 140 39.2 35.4 111
Younts Peak 8350 16.5 15.2 109 14.2 16.4 87
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Basin Index (%) 122 104
MADISON HEADWATERS IN WYOMING
Black Bear 8170 46.1 39.4 117 46.4 39.2 118
Canyon 7870 15.1 -M * 18.4 -M *
Madison Plateau 7750 32.0 23.4 137 31.6 26.2 121
West Yellowstone 6700 15.8 5.3 298 20.2 15.5 130
Whiskey Creek 6800 22.2 15.4 144 27.4 21.8 126
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Basin Index (%) 139 122
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 20.8 23.8 87 19.7 22.2 89
Canyon 7870 15.1 -M * 18.4 -M *
Evening Star 9200 28.3 26.8 106 30.7 30.5 101
Fisher Creek 9100 35.9 35.6 101 37.3 35.6 105
Monument Peak 8850 23.6 22.4 105 26.2 24.0 109
Northeast Entrance 7350 9.0 6.0 150 13.6 14.0 97
Parker Peak 9400 28.4 24.2 117 26.3 21.3 123
Sylvan Lake 8420 21.5 20.2 106 25.9 25.0 104
Thumb Divide 7980 21.6 16.7 129 20.5 19.8 104
Two Ocean Plateau 9240 34.8 32.7 106 29.3 28.6 102
White Mill 8700 26.4 25.6 103 24.9 24.5 102
Wolverine 7650 13.3 7.0 190 13.6 13.3 102
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Basin Index (%) 109 104
WIND RIVER
Burroughs Creek 8750 11.0 -M * 11.6 -M *
Castle Creek 8400 4.9 3.4 144 7.8 9.1 86
Cold Springs 9630 7.9 6.4 123 11.0 10.4 106
Deer Park 9700 25.0 15.8 158 26.2 20.4 128
Hobbs Park 10100 17.0 15.8 108 16.6 15.0 111
Kirwin 9550 10.8 11.6 93 13.8 13.8 100
Little Warm 9370 11.4 10.2 112 14.0 12.8 109
South Pass 9040 20.0 15.1 132 20.9 17.4 120
St. Lawrence Alt 8620 6.8 -M * 11.2 -M *
Togwotee Pass 9580 23.6 24.9 95 22.7 26.1 87
Townsend Creek 8700 12.6 9.8 129 14.7 13.2 111
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Basin Index (%) 118 107
BIGHORN BASIN
Bald Mtn. 9380 20.0 20.2 99 17.0 17.4 98
Bear Trap Meadow 8200 8.3 3.4 244 10.8 10.2 106
Bone Springs Div 9350 17.2 17.8 97 13.6 17.4 78
Grave Springs 8550 9.6 8.2 117 12.4 11.1 112
Kirwin 9550 10.8 11.6 93 13.8 13.8 100
Marquette 8760 9.7 8.0 121 11.2 10.9 103
Middle Powder 7760 12.9 11.4 113 11.1 11.2 99
Owl Creek 8975 6.5 3.4 191 9.8 7.3 134
Powder River Pass 9480 10.7 10.5 102 15.2 14.6 104
Shell Creek 9580 15.0 16.6 90 15.6 15.2 103
Timber Creek 7950 6.1 4.8 127 8.7 9.2 95
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Basin Index (%) 109 101
SHOSHONE RIVER
Blackwater 9780 23.6 25.5 93 24.0 24.4 98
Evening Star 9200 28.3 26.8 106 30.7 30.5 101
Marquette 8760 9.7 8.0 121 11.2 10.9 103
Sylvan Lake 8420 21.5 20.2 106 25.9 25.0 104
Sylvan Road 7120 8.9 8.4 106 16.2 17.7 92
Younts Peak 8350 16.5 15.2 109 14.2 16.4 87
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Basin Index (%) 104 98
POWDER RIVER
Bear Trap Meadow 8200 8.3 3.4 244 10.8 10.2 106
Cloud Peak Reservoir 9860 15.7 15.8 99 16.2 15.2 107
Grave Springs 8550 9.6 8.2 117 12.4 11.1 112
Hansen Sawmill 8360 7.6 5.0 152 10.4 9.9 105
Middle Powder 7760 12.9 11.4 113 11.1 11.2 99
Powder River Pass 9480 10.7 10.5 102 15.2 14.6 104
Soldier Park 8720 8.0 6.2 129 9.7 10.8 90
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Basin Index (%) 120 103
TONGUE RIVER
Big Goose 7990 10.3 8.4 123 11.8 11.4 104
Bone Springs Div 9350 17.2 17.8 97 13.6 17.4 78
Burgess Junction 7880 12.7 11.8 108 14.6 13.9 105
Dome Lake 8880 11.4 12.1 94 13.2 14.8 89
Little Goose 8870 10.5 10.4 101 13.2 14.0 94
Sucker Creek 8880 13.1 12.6 104 17.8 15.8 113
Tie Creek 6870 8.2 4.0 205 13.9 13.2 105
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Basin Index (%) 108 98
BELLE FOURCHE
Blind Park 6890 5.4 3.6 150 12.3 12.7 97
Cole Canyon 5910 5.9 2.0 295 11.6 10.2 114
North Rapid Creek 6130 4.9 3.8 129 10.2 10.5 97
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Basin Index (%) 172 102
CHEYENNE RIVER BASIN
Blind Park 6890 5.4 3.6 150 12.3 12.7 97
North Rapid Creek 6130 4.9 3.8 129 10.2 10.5 97
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Basin Index (%) 139 97
UPPER N. PLATTE
Arapaho Ridge 10976 26.9 23.9 113 26.1 24.0 109
Blackhall Mtn 9839 39.0 32.9 119 40.2 32.0 126
Cinnabar Park 9707 -M 19.4 * 24.9 24.7 101
Columbine 9167 27.1 20.8 130 28.2 27.2 104
Divide Peak 8730 29.4 18.0 163 30.7 23.3 132
Joe Wright 10158 26.2 22.4 117 30.0 28.8 104
Laprele Creek 8390 12.0 6.8 176 14.5 13.2 110
Med Bow 10512 41.1 -M * 37.1 -M *
Never Summer 10323 27.6 21.9 126 20.2 18.8 107
North French Creek 10153 31.2 31.6 99 32.1 30.2 106
Old Battle 9860 44.2 34.2 129 44.0 36.0 122
Rawah 9069 14.1 9.4 150 18.5 17.6 105
Sage Creek Basin 7850 25.5 5.4 472 21.5 13.8 156
Sand Lake 10098 29.9 30.6 98 29.8 27.1 110
South Brush Creek 8495 13.1 8.4 156 15.6 15.1 103
Tower 10620 53.4 45.3 118 53.4 43.2 124
Webber Springs 9260 30.1 21.6 139 34.1 27.6 124
Whiskey Park 9020 39.2 26.6 147 37.8 30.1 126
Willow Creek Pass 9523 19.7 14.9 132 18.9 15.2 124
Zirkel 9338 31.4 24.7 127 37.2 33.2 112
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Basin Index (%) 130 116
SWEETWATER
Deer Park 9700 25.0 15.8 158 26.2 20.4 128
Larsen Creek 9000 10.5 7.2 146 15.4 15.1 102
South Pass 9040 20.0 15.1 132 20.9 17.4 120
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Basin Index (%) 146 118
LOWER N. PLATTE
Casper Mtn. 7920 15.0 13.7 109 15.4 15.8 97
Laprele Creek 8390 12.0 6.8 176 14.5 13.2 110
Reno Hill 8430 16.4 13.6 121 18.0 17.2 105
Windy Peak 7915 11.2 7.3 153 13.4 11.8 114
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Basin Index (%) 132 106
LARAMIE RIVER
Brooklyn Lake 10250 25.4 23.2 109 27.4 24.0 114
Cinnabar Park 9707 -M 19.4 * 24.9 24.7 101
Crow Creek 8335 3.0 2.2 136 9.9 11.9 83
Deadman Hill 10239 20.6 18.6 111 20.2 20.0 101
Rawah 9069 14.1 9.4 150 18.5 17.6 105
Roach 9740 17.9 16.8 107 22.2 20.8 107
Windy Peak 7915 11.2 7.3 153 13.4 11.8 114
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Basin Index (%) 119 104
S. PLATTE
Crow Creek 8335 3.0 2.2 136 9.9 11.9 83
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Basin Index (%) 136 83
LITTLE SNAKE RIVER
Battle Mountain 7498 15.8 4.2 376 23.7 16.4 145
Divide Peak 8730 29.4 18.0 163 30.7 23.3 132
Elk River 8739 26.5 14.6 182 29.6 21.0 141
Elkhead Divide 8800 31.6 -M * 33.1 -M *
Little Snake River 8928 38.2 23.7 161 44.9 34.4 131
Old Battle 9860 44.2 34.2 129 44.0 36.0 122
Sage Creek Basin 7850 25.5 5.4 472 21.5 13.8 156
Sandstone RS 8152 23.4 9.6 244 26.4 19.0 139
Whiskey Park 9020 39.2 26.6 147 37.8 30.1 126
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Basin Index (%) 178 133
UPPER GREEN RIVER
Big Sandy Opening 9080 15.4 12.8 120 16.2 14.0 116
Blind Bull Sum 8650 27.3 25.0 109 19.7 19.1 103
East Rim Divide 7930 11.7 9.3 126 12.6 11.8 107
Elkhart Park G.S. 9400 13.0 12.9 101 12.5 13.5 93
Gros Ventre Summit 8750 12.9 13.1 98 11.7 13.6 86
Gunsight Pass 9820 15.3 13.2 116 14.2 15.0 95
Indian Creek 9425 30.5 24.2 126 26.0 20.8 125
Kendall R.S. 7740 12.7 7.7 165 13.9 14.0 99
Larsen Creek 9000 10.5 7.2 146 15.4 15.1 102
Loomis Park 8240 17.4 13.0 134 17.8 17.4 102
New Fork Lake 8340 11.2 8.4 133 -M 11.4 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 14.9 10.2 146 17.0 14.6 116
Spring Creek Divide 9000 30.2 25.6 118 -M 24.8 *
Triple Peak 8500 27.0 20.6 131 27.7 27.1 102
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Basin Index (%) 123 104
LOWER GREEN RIVER
Blacks Fork Jct 8869 14.4 6.4 225 15.8 13.4 118
Buck Pasture 9632 20.8 -M * 23.3 -M *
EF Blacks Fork GS 9360 14.5 10.0 145 12.8 12.6 102
Hams Fork 7840 16.5 6.8 243 16.1 11.6 139
Henrys Fork 10182 -M -M * 16.8 -M *
Hewinta 9500 14.5 7.3 199 17.2 15.2 113
Hickerson Park 9122 10.2 4.8 212 13.3 11.6 115
Hole-in-Rock 9168 10.3 5.6 184 12.8 11.3 113
Indian Creek 9425 30.5 24.2 126 26.0 20.8 125
Kelley R.S. 8180 22.8 13.8 165 23.4 17.6 133
Spirit Lk 10235 22.2 13.2 168 22.4 19.3 116
Steel Creek Park 10158 21.8 16.2 135 21.4 17.8 120
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Basin Index (%) 164 120
UPPER BEAR RIVER
Bear River RS 8777 12.4 1.5 827 17.1 13.0 132
Bug Lake 7987 31.6 16.7 189 26.2 18.9 139
Burts Miller Ranch 8000 7.7 .0 * 15.1 8.7 174
Chalk Creek #1 9171 35.0 22.2 158 33.5 24.4 137
Giveout 6930 15.4 1.9 811 16.6 13.4 124
Hayden Fork 9130 25.0 11.2 223 29.5 21.9 135
Kelley R.S. 8180 22.8 13.8 165 23.4 17.6 133
Lily Lake 9133 17.4 10.8 161 18.5 16.4 113
Monte Cristo 8932 47.1 25.8 183 41.0 27.0 152
Salt River Summit 7640 21.6 11.0 196 21.4 17.2 124
Spring Creek Divide 9000 30.2 25.6 118 -M 24.8 *
Trial Lake 9992 40.0 22.0 182 35.9 23.4 153
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Basin Index (%) 188 138
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-M = Missing data
* = Data may not provide a valid measure of conditions.
Units = inches for the Current and Median (or Average) Snow Water Equivalent and
Total Precipitation values
If the Basin Index (%) value is flagged as potentially
invalid, care should be taken to evaluate if the value is representative
of conditions in the basin.
The SNOW WATER EQUIVALENT Percent of Median (or Average) represents the snow water
equivalent found at selected SNOTEL sites in or near the basin compared to
the Median (or Average) value for those sites on this day.
The TOTAL PRECIPITATION Percent of Median (or Average) represents the total precipitation
(beginning October 1st) found at selected SNOTEL sites in or near the basin
compared to the Median (or Average) value for those sites on this day.
Contact your state water supply staff for assistance.
Medians and averages are calculated for the period 1991-2020.
Provisional data, subject to revision.
* Site -- Either: (a) the current value is missing; (b) the median or
average for the day is not available or is zero; or (c) for snow water
equivalent, the median or average for the day is less than 10% of the maximum
median or average value for the year.
* Basin - More than half of the stations for a basin with medians (or averages) report missing or invalid data
The basin index is calculated as the sum of the valid current values
divided by the sum of the corresponding medians or averages and the resulting fraction
multiplied by 100.
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-M = Missing data
* = Data may not provide a valid measure of conditions.
Units = inches for the Current and Normal Snow Water Equivalent and
Total Precipitation values
If the Basin Index (%) value is flagged as potentially
invalid, care should be taken to evaluate if the value is representative
of conditions in the basin.
The SNOW WATER EQUIVALENT Percent of Median represents the snow water
equivalent found at selected SNOTEL sites in or near the basin compared to
the Median value for those sites on this day.
The TOTAL PRECIPITATION Percent of Average represents the total precipitation
(beginning October 1st) found at selected SNOTEL sites in or near the basin
compared to the Average value for those sites on this day.
Contact your state water supply staff for assistance.
Medians and averages are calculated for the period 1981-2010.
Provisional data, subject to revision.
* Site -- Either: (a) the current value is missing; (b) the median or
average for the day is not available or is zero; or (c) for snow water
equivalent, the median for the day is less than 10% of the maximum
median value for the year.
* Basin - More than half of the sites within the basin are flagged with *,
preventing the calculation of a meaningful basin index.
The basin index is calculated as the sum of the valid current values
divided by the sum of the corresponding medians (for snow water equivalent)
or averages (for precipitation) and the resulting fraction multiplied by 100.
