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 TUESDAY: APRIL 25 , 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 19.1 12.6 152 22.5 22.0 102
Blind Bull Sum 8650 27.8 25.0 111 19.9 19.2 104
Cottonwood Creek 7670 27.6 19.2 144 31.0 27.0 115
East Rim Divide 7930 11.5 9.0 128 12.9 11.9 108
Grand Targhee 9260 50.3 47.1 107 31.7 35.6 89
Granite Creek 6770 18.4 11.6 159 16.2 20.0 81
Grassy Lake 7265 37.8 30.4 124 42.2 37.7 112
Gros Ventre Summit 8750 12.8 13.1 98 11.9 13.7 87
Gunsight Pass 9820 14.3 13.2 108 14.4 15.4 94
Lewis Lake Divide 7850 39.9 31.6 126 42.8 35.6 120
Loomis Park 8240 17.2 12.4 139 17.9 17.4 103
Phillips Bench 8200 30.6 27.0 113 32.2 28.0 115
Salt River Summit 7640 21.5 10.6 203 21.7 17.4 125
Snake River Station 6920 19.0 13.2 144 24.8 23.8 104
Somsen Ranch 6800 -M 5.2 * -M 17.6 *
Spring Creek Divide 9000 30.5 25.8 118 -M 24.8 *
Thumb Divide 7980 21.6 16.2 133 20.7 20.0 104
Togwotee Pass 9580 24.0 25.0 96 22.8 26.4 86
Triple Peak 8500 27.2 20.0 136 28.2 27.2 104
Two Ocean Plateau 9240 34.9 32.8 106 29.7 28.7 103
Willow Creek 8080 40.3 28.2 143 40.0 36.2 110
Younts Peak 8350 16.4 15.0 109 14.6 16.4 89
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Basin Index (%) 124 104
MADISON HEADWATERS IN WYOMING
Black Bear 8170 46.1 39.7 116 46.8 39.4 119
Canyon 7870 15.3 -M * 18.8 -M *
Madison Plateau 7750 32.3 23.2 139 31.9 26.3 121
West Yellowstone 6700 14.8 4.4 336 20.4 15.5 132
Whiskey Creek 6800 22.5 15.2 148 27.9 22.2 126
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Basin Index (%) 140 123
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 21.3 24.0 89 19.9 22.2 90
Canyon 7870 15.3 -M * 18.8 -M *
Evening Star 9200 28.3 26.8 106 31.2 30.5 102
Fisher Creek 9100 36.2 35.7 101 37.9 35.8 106
Monument Peak 8850 23.6 22.4 105 26.5 24.1 110
Northeast Entrance 7350 9.0 5.4 167 13.9 14.0 99
Parker Peak 9400 29.0 24.0 121 26.7 21.6 124
Sylvan Lake 8420 21.6 20.2 107 26.1 25.2 104
Thumb Divide 7980 21.6 16.2 133 20.7 20.0 104
Two Ocean Plateau 9240 34.9 32.8 106 29.7 28.7 103
White Mill 8700 26.7 25.6 104 25.3 24.6 103
Wolverine 7650 13.3 6.0 222 14.4 13.3 108
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Basin Index (%) 111 105
WIND RIVER
Burroughs Creek 8750 10.3 -M * 11.6 -M *
Castle Creek 8400 4.4 3.0 147 8.0 9.1 88
Cold Springs 9630 7.4 5.7 130 11.2 10.4 108
Deer Park 9700 24.9 15.8 158 26.3 20.7 127
Hobbs Park 10100 17.1 16.0 107 17.0 15.7 108
Kirwin 9550 11.3 11.8 96 14.1 14.0 101
Little Warm 9370 11.3 10.2 111 14.4 13.0 111
South Pass 9040 19.3 15.0 129 21.1 17.7 119
St. Lawrence Alt 8620 6.8 -M * 11.6 -M *
Togwotee Pass 9580 24.0 25.0 96 22.8 26.4 86
Townsend Creek 8700 12.2 9.4 130 14.9 13.2 113
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Basin Index (%) 118 107
BIGHORN BASIN
Bald Mtn. 9380 19.9 20.6 97 17.0 17.9 95
Bear Trap Meadow 8200 8.0 3.2 250 11.0 10.5 105
Bone Springs Div 9350 17.6 17.8 99 13.6 17.5 78
Grave Springs 8550 9.8 8.2 120 12.5 11.2 112
Kirwin 9550 11.3 11.8 96 14.1 14.0 101
Marquette 8760 9.8 8.0 122 11.6 11.2 104
Middle Powder 7760 13.1 11.4 115 11.2 11.4 98
Owl Creek 8975 5.9 3.0 197 10.0 7.4 135
Powder River Pass 9480 10.4 10.8 96 15.4 14.9 103
Shell Creek 9580 15.0 16.6 90 15.7 15.4 102
Timber Creek 7950 6.0 4.0 150 8.9 9.4 95
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Basin Index (%) 110 100
SHOSHONE RIVER
Blackwater 9780 23.8 25.8 92 24.4 24.5 100
Evening Star 9200 28.3 26.8 106 31.2 30.5 102
Marquette 8760 9.8 8.0 122 11.6 11.2 104
Sylvan Lake 8420 21.6 20.2 107 26.1 25.2 104
Sylvan Road 7120 7.8 7.8 100 16.2 17.8 91
Younts Peak 8350 16.4 15.0 109 14.6 16.4 89
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Basin Index (%) 104 99
POWDER RIVER
Bear Trap Meadow 8200 8.0 3.2 250 11.0 10.5 105
Cloud Peak Reservoir 9860 15.8 16.0 99 16.2 16.2 100
Grave Springs 8550 9.8 8.2 120 12.5 11.2 112
Hansen Sawmill 8360 7.9 4.9 161 10.5 10.0 105
Middle Powder 7760 13.1 11.4 115 11.2 11.4 98
Powder River Pass 9480 10.4 10.8 96 15.4 14.9 103
Soldier Park 8720 8.0 6.5 123 9.9 10.9 91
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Basin Index (%) 120 102
TONGUE RIVER
Big Goose 7990 10.4 9.2 113 11.8 12.3 96
Bone Springs Div 9350 17.6 17.8 99 13.6 17.5 78
Burgess Junction 7880 13.0 12.1 107 14.6 14.1 104
Dome Lake 8880 11.9 11.9 100 13.2 15.2 87
Little Goose 8870 10.4 11.0 95 13.2 15.0 88
Sucker Creek 8880 13.3 13.0 102 17.8 16.1 111
Tie Creek 6870 7.9 3.5 226 13.9 13.2 105
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Basin Index (%) 108 95
BELLE FOURCHE
Blind Park 6890 4.5 3.5 129 12.4 12.8 97
Cole Canyon 5910 5.7 .8 712 11.8 10.3 115
North Rapid Creek 6130 4.3 3.2 134 10.2 10.7 95
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Basin Index (%) 193 102
CHEYENNE RIVER BASIN
Blind Park 6890 4.5 3.5 129 12.4 12.8 97
North Rapid Creek 6130 4.3 3.2 134 10.2 10.7 95
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Basin Index (%) 131 96
UPPER N. PLATTE
Arapaho Ridge 10976 27.5 23.8 116 26.5 24.7 107
Blackhall Mtn 9839 39.0 32.8 119 40.3 33.4 121
Cinnabar Park 9707 -M 20.1 * 25.0 25.5 98
Columbine 9167 27.8 21.0 132 28.8 28.1 102
Divide Peak 8730 29.8 17.2 173 30.9 24.1 128
Joe Wright 10158 26.3 22.6 116 30.1 29.4 102
Laprele Creek 8390 11.6 7.3 159 14.5 13.4 108
Med Bow 10512 41.3 -M * 37.4 -M *
Never Summer 10323 27.4 22.0 125 20.4 19.1 107
North French Creek 10153 31.3 31.6 99 32.3 30.8 105
Old Battle 9860 44.2 35.0 126 44.5 37.0 120
Rawah 9069 13.7 9.0 152 18.5 18.2 102
Sage Creek Basin 7850 24.5 3.6 681 21.8 14.4 151
Sand Lake 10098 30.1 31.2 96 30.1 28.0 108
South Brush Creek 8495 12.6 8.4 150 15.7 15.2 103
Tower 10620 53.2 46.7 114 53.7 44.8 120
Webber Springs 9260 30.2 21.8 139 34.3 28.2 122
Whiskey Park 9020 39.5 27.4 144 38.0 31.3 121
Willow Creek Pass 9523 19.9 14.8 134 19.2 15.5 124
Zirkel 9338 32.0 24.2 132 37.4 33.8 111
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Basin Index (%) 130 114
SWEETWATER
Deer Park 9700 24.9 15.8 158 26.3 20.7 127
Larsen Creek 9000 10.8 6.0 180 15.7 15.2 103
South Pass 9040 19.3 15.0 129 21.1 17.7 119
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Basin Index (%) 149 118
LOWER N. PLATTE
Casper Mtn. 7920 14.4 13.4 107 15.5 16.2 96
Laprele Creek 8390 11.6 7.3 159 14.5 13.4 108
Reno Hill 8430 16.3 13.9 117 18.1 17.8 102
Windy Peak 7915 11.1 6.4 173 13.6 12.2 111
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Basin Index (%) 130 104
LARAMIE RIVER
Brooklyn Lake 10250 25.7 23.0 112 27.7 24.4 114
Cinnabar Park 9707 -M 20.1 * 25.0 25.5 98
Crow Creek 8335 2.2 1.2 183 10.0 12.2 82
Deadman Hill 10239 20.8 19.2 108 20.3 20.7 98
Rawah 9069 13.7 9.0 152 18.5 18.2 102
Roach 9740 17.9 16.4 109 22.5 21.0 107
Windy Peak 7915 11.1 6.4 173 13.6 12.2 111
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Basin Index (%) 122 103
S. PLATTE
Crow Creek 8335 2.2 1.2 183 10.0 12.2 82
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Basin Index (%) 183 82
LITTLE SNAKE RIVER
Battle Mountain 7498 14.5 3.6 403 24.1 16.8 143
Divide Peak 8730 29.8 17.2 173 30.9 24.1 128
Elk River 8739 26.5 14.4 184 29.7 21.8 136
Elkhead Divide 8800 31.8 -M * 33.4 -M *
Little Snake River 8928 38.1 24.2 157 45.0 35.8 126
Old Battle 9860 44.2 35.0 126 44.5 37.0 120
Sage Creek Basin 7850 24.5 3.6 681 21.8 14.4 151
Sandstone RS 8152 22.6 8.9 254 26.7 19.2 139
Whiskey Park 9020 39.5 27.4 144 38.0 31.3 121
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Basin Index (%) 178 130
UPPER GREEN RIVER
Big Sandy Opening 9080 15.8 12.6 125 16.5 14.2 116
Blind Bull Sum 8650 27.8 25.0 111 19.9 19.2 104
East Rim Divide 7930 11.5 9.0 128 12.9 11.9 108
Elkhart Park G.S. 9400 12.7 12.2 104 12.7 13.7 93
Gros Ventre Summit 8750 12.8 13.1 98 11.9 13.7 87
Gunsight Pass 9820 14.3 13.2 108 14.4 15.4 94
Indian Creek 9425 30.7 24.0 128 26.3 20.9 126
Kendall R.S. 7740 12.6 6.8 185 14.1 14.0 101
Larsen Creek 9000 10.8 6.0 180 15.7 15.2 103
Loomis Park 8240 17.2 12.4 139 17.9 17.4 103
New Fork Lake 8340 11.0 7.7 143 -M 11.4 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 15.2 9.7 157 17.3 14.7 118
Spring Creek Divide 9000 30.5 25.8 118 -M 24.8 *
Triple Peak 8500 27.2 20.0 136 28.2 27.2 104
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Basin Index (%) 127 105
LOWER GREEN RIVER
Blacks Fork Jct 8869 14.6 5.8 252 16.0 13.6 118
Buck Pasture 9632 21.0 -M * 23.4 -M *
EF Blacks Fork GS 9360 14.6 9.0 162 13.1 12.8 102
Hams Fork 7840 15.7 5.9 266 16.3 11.6 141
Henrys Fork 10182 -M -M * 16.9 -M *
Hewinta 9500 14.6 7.0 209 17.6 15.3 115
Hickerson Park 9122 10.4 4.8 217 13.5 11.9 113
Hole-in-Rock 9168 10.7 4.6 233 13.0 11.4 114
Indian Creek 9425 30.7 24.0 128 26.3 20.9 126
Kelley R.S. 8180 22.7 13.4 169 23.7 17.7 134
Spirit Lk 10235 22.2 13.2 168 22.6 19.4 116
Steel Creek Park 10158 22.2 16.6 134 21.8 17.8 122
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Basin Index (%) 171 121
UPPER BEAR RIVER
Bear River RS 8777 12.2 1.0 1220 17.2 13.1 131
Bug Lake 7987 31.8 16.3 195 26.4 19.2 138
Burts Miller Ranch 8000 7.5 .0 * 15.3 8.7 176
Chalk Creek #1 9171 -M 22.2 * -M 24.5 *
Giveout 6930 15.8 .7 2257* 16.9 13.5 125
Hayden Fork 9130 25.0 10.6 236 29.7 22.1 134
Kelley R.S. 8180 22.7 13.4 169 23.7 17.7 134
Lily Lake 9133 17.4 10.2 171 18.6 16.5 113
Monte Cristo 8932 47.4 25.6 185 42.7 27.4 156
Salt River Summit 7640 21.5 10.6 203 21.7 17.4 125
Spring Creek Divide 9000 30.5 25.8 118 -M 24.8 *
Trial Lake 9992 40.6 22.4 181 36.0 23.8 151
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Basin Index (%) 199 138
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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.
