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 THURSDAY: APRIL 27 , 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 18.0 11.9 151 22.5 22.1 102
Blind Bull Sum 8650 28.5 24.8 115 20.0 19.2 104
Cottonwood Creek 7670 27.1 19.4 140 31.1 27.4 114
East Rim Divide 7930 10.8 8.2 132 13.0 12.1 107
Grand Targhee 9260 50.5 47.6 106 31.8 35.8 89
Granite Creek 6770 17.3 11.0 157 16.2 20.3 80
Grassy Lake 7265 37.7 31.0 122 42.3 37.8 112
Gros Ventre Summit 8750 12.9 12.7 102 12.0 14.1 85
Gunsight Pass 9820 14.9 13.4 111 14.9 15.7 95
Lewis Lake Divide 7850 39.6 31.2 127 42.8 36.0 119
Loomis Park 8240 16.5 11.6 142 18.0 17.6 102
Phillips Bench 8200 30.5 27.5 111 32.2 28.2 114
Salt River Summit 7640 21.3 9.7 220 21.9 17.4 126
Snake River Station 6920 17.5 13.0 135 24.7 24.0 103
Somsen Ranch 6800 -M 4.1 * -M 17.8 *
Spring Creek Divide 9000 31.0 25.2 123 23.3 25.2 92
Thumb Divide 7980 21.3 15.3 139 20.7 20.5 101
Togwotee Pass 9580 23.9 25.2 95 23.2 26.6 87
Triple Peak 8500 27.4 19.9 138 28.4 27.2 104
Two Ocean Plateau 9240 34.9 32.6 107 29.8 28.8 103
Willow Creek 8080 40.9 28.1 146 40.2 36.5 110
Younts Peak 8350 15.9 14.8 107 14.6 16.6 88
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Basin Index (%) 124 103
MADISON HEADWATERS IN WYOMING
Black Bear 8170 45.5 40.4 113 47.0 39.6 119
Canyon 7870 15.2 -M * 18.8 -M *
Madison Plateau 7750 33.1 23.1 143 32.0 27.1 118
West Yellowstone 6700 13.6 3.6 378 20.4 15.5 132
Whiskey Creek 6800 22.6 14.8 153 27.9 22.2 126
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Basin Index (%) 140 122
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 21.2 24.0 88 20.2 22.4 90
Canyon 7870 15.2 -M * 18.8 -M *
Evening Star 9200 28.0 26.9 104 31.2 30.8 101
Fisher Creek 9100 36.2 35.8 101 37.9 36.0 105
Monument Peak 8850 23.8 22.4 106 26.5 24.4 109
Northeast Entrance 7350 7.9 4.5 176 13.9 14.1 99
Parker Peak 9400 29.9 23.2 129 26.8 22.0 122
Sylvan Lake 8420 21.5 20.6 104 26.1 25.9 101
Thumb Divide 7980 21.3 15.3 139 20.7 20.5 101
Two Ocean Plateau 9240 34.9 32.6 107 29.8 28.8 103
White Mill 8700 26.7 25.9 103 25.4 25.0 102
Wolverine 7650 12.9 5.2 248 14.4 13.4 107
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Basin Index (%) 112 104
WIND RIVER
Burroughs Creek 8750 9.0 -M * 11.6 -M *
Castle Creek 8400 3.6 1.8 200 8.0 9.4 85
Cold Springs 9630 7.8 5.7 137 11.9 11.0 108
Deer Park 9700 26.2 15.6 168 27.9 20.9 133
Hobbs Park 10100 18.8 16.2 116 19.0 15.8 120
Kirwin 9550 11.6 12.1 96 14.2 14.0 101
Little Warm 9370 11.4 9.7 118 14.5 13.0 112
South Pass 9040 21.2 15.1 140 22.1 18.0 123
St. Lawrence Alt 8620 7.9 -M * 12.6 -M *
Togwotee Pass 9580 23.9 25.2 95 23.2 26.6 87
Townsend Creek 8700 13.6 9.4 145 16.3 13.2 123
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Basin Index (%) 125 111
BIGHORN BASIN
Bald Mtn. 9380 20.0 20.5 98 17.1 18.0 95
Bear Trap Meadow 8200 7.0 3.3 212 11.0 10.6 104
Bone Springs Div 9350 17.6 17.4 101 13.7 17.8 77
Grave Springs 8550 9.6 8.6 112 12.6 11.8 107
Kirwin 9550 11.6 12.1 96 14.2 14.0 101
Marquette 8760 9.6 8.0 120 11.6 11.6 100
Middle Powder 7760 12.6 12.2 103 11.3 11.9 95
Owl Creek 8975 4.6 2.2 209 10.1 8.0 126
Powder River Pass 9480 10.0 10.7 93 15.4 15.2 101
Shell Creek 9580 15.2 16.5 92 15.9 15.5 103
Timber Creek 7950 5.7 3.6 158 8.9 9.6 93
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Basin Index (%) 107 98
SHOSHONE RIVER
Blackwater 9780 23.9 25.3 94 24.4 24.6 99
Evening Star 9200 28.0 26.9 104 31.2 30.8 101
Marquette 8760 9.6 8.0 120 11.6 11.6 100
Sylvan Lake 8420 21.5 20.6 104 26.1 25.9 101
Sylvan Road 7120 6.2 7.1 87 16.1 17.9 90
Younts Peak 8350 15.9 14.8 107 14.6 16.6 88
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Basin Index (%) 102 97
POWDER RIVER
Bear Trap Meadow 8200 7.0 3.3 212 11.0 10.6 104
Cloud Peak Reservoir 9860 15.0 16.0 94 16.3 16.3 100
Grave Springs 8550 9.6 8.6 112 12.6 11.8 107
Hansen Sawmill 8360 7.8 4.6 170 10.5 10.2 103
Middle Powder 7760 12.6 12.2 103 11.3 11.9 95
Powder River Pass 9480 10.0 10.7 93 15.4 15.2 101
Soldier Park 8720 7.8 6.0 130 9.9 11.1 89
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Basin Index (%) 114 100
TONGUE RIVER
Big Goose 7990 10.0 8.9 112 11.7 12.4 94
Bone Springs Div 9350 17.6 17.4 101 13.7 17.8 77
Burgess Junction 7880 12.8 12.1 106 14.7 14.3 103
Dome Lake 8880 11.6 11.1 105 13.2 15.6 85
Little Goose 8870 10.2 11.1 92 13.2 15.4 86
Sucker Creek 8880 13.2 13.2 100 17.9 16.7 107
Tie Creek 6870 7.3 2.7 270 14.0 13.5 104
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Basin Index (%) 108 93
BELLE FOURCHE
Blind Park 6890 3.5 2.6 135 12.4 13.1 95
Cole Canyon 5910 5.0 .6 833 11.9 10.8 110
North Rapid Creek 6130 3.4 2.0 170 10.1 10.7 94
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Basin Index (%) 229 99
CHEYENNE RIVER BASIN
Blind Park 6890 3.5 2.6 135 12.4 13.1 95
North Rapid Creek 6130 3.4 2.0 170 10.1 10.7 94
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Basin Index (%) 150 95
UPPER N. PLATTE
Arapaho Ridge 10976 27.8 23.8 117 26.8 25.0 107
Blackhall Mtn 9839 38.9 32.2 121 40.5 33.4 121
Cinnabar Park 9707 -M 20.1 * 25.4 25.8 98
Columbine 9167 27.3 20.1 136 29.1 28.6 102
Divide Peak 8730 30.0 17.1 175 31.2 24.3 128
Joe Wright 10158 27.3 22.8 120 30.5 29.6 103
Laprele Creek 8390 11.4 7.2 158 14.7 14.2 104
Med Bow 10512 41.5 -M * 37.8 -M *
Never Summer 10323 27.6 22.1 125 20.6 19.2 107
North French Creek 10153 32.0 31.7 101 32.7 31.8 103
Old Battle 9860 44.3 35.6 124 44.7 37.0 121
Rawah 9069 13.1 8.3 158 18.9 18.6 102
Sage Creek Basin 7850 23.0 1.5 1533 21.9 14.4 152
Sand Lake 10098 30.5 31.2 98 30.5 28.6 107
South Brush Creek 8495 12.5 8.0 156 16.2 15.6 104
Tower 10620 52.9 46.7 113 54.0 45.0 120
Webber Springs 9260 30.4 22.4 136 34.4 28.5 121
Whiskey Park 9020 39.4 27.0 146 38.2 31.5 121
Willow Creek Pass 9523 20.0 15.0 133 19.2 15.7 122
Zirkel 9338 31.7 24.4 130 37.5 34.4 109
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Basin Index (%) 131 113
SWEETWATER
Deer Park 9700 26.2 15.6 168 27.9 20.9 133
Larsen Creek 9000 12.1 5.6 216 16.9 15.6 108
South Pass 9040 21.2 15.1 140 22.1 18.0 123
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Basin Index (%) 164 123
LOWER N. PLATTE
Casper Mtn. 7920 13.5 13.6 99 15.6 17.3 90
Laprele Creek 8390 11.4 7.2 158 14.7 14.2 104
Reno Hill 8430 16.1 14.0 115 18.4 18.0 102
Windy Peak 7915 11.1 5.4 206 13.8 12.4 111
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Basin Index (%) 130 101
LARAMIE RIVER
Brooklyn Lake 10250 25.9 23.3 111 28.0 24.8 113
Cinnabar Park 9707 -M 20.1 * 25.4 25.8 98
Crow Creek 8335 2.0 .0 * 10.3 12.3 84
Deadman Hill 10239 21.2 19.4 109 20.7 20.8 100
Rawah 9069 13.1 8.3 158 18.9 18.6 102
Roach 9740 18.0 16.4 110 22.8 21.2 108
Windy Peak 7915 11.1 5.4 206 13.8 12.4 111
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Basin Index (%) 125 103
S. PLATTE
Crow Creek 8335 2.0 .0 * 10.3 12.3 84
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Basin Index (%) * 84
LITTLE SNAKE RIVER
Battle Mountain 7498 12.9 1.6 806 24.2 17.2 141
Divide Peak 8730 30.0 17.1 175 31.2 24.3 128
Elk River 8739 25.8 13.6 190 30.1 21.8 138
Elkhead Divide 8800 31.0 -M * 33.4 -M *
Little Snake River 8928 38.3 24.3 158 45.2 36.2 125
Old Battle 9860 44.3 35.6 124 44.7 37.0 121
Sage Creek Basin 7850 23.0 1.5 1533 21.9 14.4 152
Sandstone RS 8152 21.4 7.4 289 26.9 19.2 140
Whiskey Park 9020 39.4 27.0 146 38.2 31.5 121
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Basin Index (%) 184 130
UPPER GREEN RIVER
Big Sandy Opening 9080 16.6 12.4 134 17.3 14.8 117
Blind Bull Sum 8650 28.5 24.8 115 20.0 19.2 104
East Rim Divide 7930 10.8 8.2 132 13.0 12.1 107
Elkhart Park G.S. 9400 12.8 11.9 108 13.1 13.8 95
Gros Ventre Summit 8750 12.9 12.7 102 12.0 14.1 85
Gunsight Pass 9820 14.9 13.4 111 14.9 15.7 95
Indian Creek 9425 31.4 23.2 135 26.5 20.9 127
Kendall R.S. 7740 11.7 6.2 189 14.2 14.0 101
Larsen Creek 9000 12.1 5.6 216 16.9 15.6 108
Loomis Park 8240 16.5 11.6 142 18.0 17.6 102
New Fork Lake 8340 10.6 7.1 149 -M 11.6 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 14.4 8.8 164 17.3 14.8 117
Spring Creek Divide 9000 31.0 25.2 123 23.3 25.2 92
Triple Peak 8500 27.4 19.9 138 28.4 27.2 104
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Basin Index (%) 132 104
LOWER GREEN RIVER
Blacks Fork Jct 8869 15.1 5.2 290 16.3 14.0 116
Buck Pasture 9632 22.0 -M * 23.8 -M *
EF Blacks Fork GS 9360 14.9 8.4 177 13.5 13.2 102
Hams Fork 7840 14.5 5.4 269 16.3 11.8 138
Henrys Fork 10182 -M -M * 17.0 -M *
Hewinta 9500 14.7 6.6 223 18.1 15.5 117
Hickerson Park 9122 10.7 4.8 223 13.9 11.9 117
Hole-in-Rock 9168 11.2 4.2 267 13.3 11.6 115
Indian Creek 9425 31.4 23.2 135 26.5 20.9 127
Kelley R.S. 8180 22.7 12.6 180 23.7 17.8 133
Spirit Lk 10235 23.1 13.0 178 23.2 19.4 120
Steel Creek Park 10158 22.6 16.8 135 22.3 18.2 123
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Basin Index (%) 181 121
UPPER BEAR RIVER
Bear River RS 8777 12.3 1.2 1025 17.5 13.8 127
Bug Lake 7987 31.8 15.6 204 26.6 19.2 139
Burts Miller Ranch 8000 7.5 .0 * 15.6 8.7 179
Chalk Creek #1 9171 -M 21.6 * -M 25.2 *
Giveout 6930 15.0 .0 * 16.9 13.6 124
Hayden Fork 9130 25.4 10.2 249 30.1 22.4 134
Kelley R.S. 8180 22.7 12.6 180 23.7 17.8 133
Lily Lake 9133 17.2 10.2 169 18.9 17.4 109
Monte Cristo 8932 48.1 26.2 184 -M 27.8 *
Salt River Summit 7640 21.3 9.7 220 21.9 17.4 126
Spring Creek Divide 9000 31.0 25.2 123 23.3 25.2 92
Trial Lake 9992 40.4 22.9 176 36.7 24.4 150
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Basin Index (%) 204 129
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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.
