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 WEDNESDAY: APRIL 26 , 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 18.6 12.2 152 22.5 22.0 102
Blind Bull Sum 8650 27.8 25.0 111 20.0 19.2 104
Cottonwood Creek 7670 27.6 19.2 144 31.2 27.2 115
East Rim Divide 7930 11.4 8.6 133 13.0 12.0 108
Grand Targhee 9260 50.4 47.4 106 31.8 35.6 89
Granite Creek 6770 17.9 11.4 157 16.2 20.2 80
Grassy Lake 7265 38.1 31.0 123 42.3 37.8 112
Gros Ventre Summit 8750 13.0 12.9 101 12.0 13.9 86
Gunsight Pass 9820 14.9 13.4 111 14.9 15.6 96
Lewis Lake Divide 7850 39.7 31.3 127 42.8 35.8 120
Loomis Park 8240 17.1 12.0 142 18.0 17.5 103
Phillips Bench 8200 30.7 27.3 112 32.2 28.2 114
Salt River Summit 7640 21.4 10.2 210 21.8 17.4 125
Snake River Station 6920 18.1 13.2 137 24.7 23.9 103
Somsen Ranch 6800 -M 4.7 * -M 17.8 *
Spring Creek Divide 9000 30.8 25.4 121 23.3 25.1 93
Thumb Divide 7980 21.5 16.0 134 20.7 20.2 102
Togwotee Pass 9580 24.0 25.1 96 23.2 26.6 87
Triple Peak 8500 27.3 19.9 137 28.4 27.2 104
Two Ocean Plateau 9240 34.9 32.6 107 29.7 28.7 103
Willow Creek 8080 39.9 28.1 142 40.2 36.2 111
Younts Peak 8350 16.3 15.0 109 14.6 16.6 88
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Basin Index (%) 124 103
MADISON HEADWATERS IN WYOMING
Black Bear 8170 45.7 40.0 114 46.9 39.4 119
Canyon 7870 15.4 -M * 18.8 -M *
Madison Plateau 7750 32.7 23.2 141 32.0 26.6 120
West Yellowstone 6700 14.4 4.2 343 20.4 15.5 132
Whiskey Creek 6800 22.7 15.0 151 27.7 22.2 125
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Basin Index (%) 140 122
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 21.2 24.1 88 20.1 22.3 90
Canyon 7870 15.4 -M * 18.8 -M *
Evening Star 9200 28.3 26.8 106 31.2 30.6 102
Fisher Creek 9100 36.2 35.6 102 37.9 35.9 106
Monument Peak 8850 23.7 22.4 106 26.5 24.3 109
Northeast Entrance 7350 8.5 4.8 177 13.9 14.0 99
Parker Peak 9400 29.3 23.5 125 26.8 21.8 123
Sylvan Lake 8420 21.6 20.2 107 26.1 25.5 102
Thumb Divide 7980 21.5 16.0 134 20.7 20.2 102
Two Ocean Plateau 9240 34.9 32.6 107 29.7 28.7 103
White Mill 8700 26.7 25.8 103 25.3 24.8 102
Wolverine 7650 13.2 5.3 249 14.4 13.3 108
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Basin Index (%) 112 104
WIND RIVER
Burroughs Creek 8750 9.6 -M * 11.6 -M *
Castle Creek 8400 4.2 2.4 175 8.0 9.2 87
Cold Springs 9630 8.0 5.9 136 11.9 11.0 108
Deer Park 9700 26.5 15.6 170 27.9 20.7 135
Hobbs Park 10100 19.1 16.1 119 18.9 15.7 120
Kirwin 9550 11.4 12.1 94 14.2 14.0 101
Little Warm 9370 11.6 10.1 115 14.5 13.0 112
South Pass 9040 21.2 14.7 144 21.6 17.8 121
St. Lawrence Alt 8620 8.1 -M * 12.5 -M *
Togwotee Pass 9580 24.0 25.1 96 23.2 26.6 87
Townsend Creek 8700 13.8 9.5 145 16.3 13.2 123
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Basin Index (%) 125 111
BIGHORN BASIN
Bald Mtn. 9380 19.9 20.6 97 17.1 18.0 95
Bear Trap Meadow 8200 7.7 3.0 257 10.9 10.6 103
Bone Springs Div 9350 17.5 17.4 101 13.7 17.7 77
Grave Springs 8550 9.7 8.2 118 12.5 11.4 110
Kirwin 9550 11.4 12.1 94 14.2 14.0 101
Marquette 8760 10.0 8.0 125 11.6 11.3 103
Middle Powder 7760 13.0 11.8 110 11.2 11.8 95
Owl Creek 8975 5.7 2.7 211 10.1 7.7 131
Powder River Pass 9480 10.2 11.0 93 15.4 15.2 101
Shell Creek 9580 15.1 16.6 91 15.9 15.4 103
Timber Creek 7950 6.1 3.8 161 8.9 9.6 93
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Basin Index (%) 110 99
SHOSHONE RIVER
Blackwater 9780 24.0 25.5 94 24.4 24.6 99
Evening Star 9200 28.3 26.8 106 31.2 30.6 102
Marquette 8760 10.0 8.0 125 11.6 11.3 103
Sylvan Lake 8420 21.6 20.2 107 26.1 25.5 102
Sylvan Road 7120 7.3 7.6 96 16.2 17.8 91
Younts Peak 8350 16.3 15.0 109 14.6 16.6 88
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Basin Index (%) 104 98
POWDER RIVER
Bear Trap Meadow 8200 7.7 3.0 257 10.9 10.6 103
Cloud Peak Reservoir 9860 15.8 15.8 100 16.2 16.3 99
Grave Springs 8550 9.7 8.2 118 12.5 11.4 110
Hansen Sawmill 8360 7.9 4.8 165 10.5 10.1 104
Middle Powder 7760 13.0 11.8 110 11.2 11.8 95
Powder River Pass 9480 10.2 11.0 93 15.4 15.2 101
Soldier Park 8720 8.1 6.2 131 9.9 11.0 90
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Basin Index (%) 119 100
TONGUE RIVER
Big Goose 7990 10.3 9.0 114 11.8 12.4 95
Bone Springs Div 9350 17.5 17.4 101 13.7 17.7 77
Burgess Junction 7880 12.8 12.0 107 14.6 14.2 103
Dome Lake 8880 11.8 11.4 104 13.2 15.4 86
Little Goose 8870 10.3 11.0 94 13.2 15.2 87
Sucker Creek 8880 13.2 13.3 99 17.9 16.6 108
Tie Creek 6870 7.6 3.0 253 14.0 13.3 105
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Basin Index (%) 108 94
BELLE FOURCHE
Blind Park 6890 4.1 3.2 128 12.4 13.0 95
Cole Canyon 5910 5.5 1.2 458 11.9 10.6 112
North Rapid Creek 6130 3.9 2.6 150 10.2 10.7 95
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Basin Index (%) 193 101
CHEYENNE RIVER BASIN
Blind Park 6890 4.1 3.2 128 12.4 13.0 95
North Rapid Creek 6130 3.9 2.6 150 10.2 10.7 95
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Basin Index (%) 138 95
UPPER N. PLATTE
Arapaho Ridge 10976 27.8 23.9 116 26.8 24.8 108
Blackhall Mtn 9839 39.1 32.3 121 40.6 33.4 122
Cinnabar Park 9707 -M 20.1 * 25.4 25.5 100
Columbine 9167 26.7 20.6 130 29.1 28.4 102
Divide Peak 8730 29.7 17.3 172 31.2 24.2 129
Joe Wright 10158 26.6 22.8 117 30.5 29.6 103
Laprele Creek 8390 11.6 7.2 161 14.8 13.7 108
Med Bow 10512 41.6 -M * 37.8 -M *
Never Summer 10323 27.4 22.1 124 20.6 19.1 108
North French Creek 10153 31.6 31.4 101 32.7 31.2 105
Old Battle 9860 44.4 35.2 126 44.7 37.0 121
Rawah 9069 13.4 8.6 156 18.9 18.4 103
Sage Creek Basin 7850 23.8 2.6 915 21.9 14.4 152
Sand Lake 10098 30.4 31.1 98 30.5 28.3 108
South Brush Creek 8495 13.1 8.4 156 16.2 15.5 105
Tower 10620 53.2 46.8 114 54.1 44.9 120
Webber Springs 9260 30.1 22.1 136 34.4 28.5 121
Whiskey Park 9020 39.0 27.4 142 38.2 31.5 121
Willow Creek Pass 9523 19.9 14.9 134 19.2 15.6 123
Zirkel 9338 31.3 24.3 129 37.5 34.0 110
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Basin Index (%) 130 114
SWEETWATER
Deer Park 9700 26.5 15.6 170 27.9 20.7 135
Larsen Creek 9000 12.1 5.8 209 16.8 15.4 109
South Pass 9040 21.2 14.7 144 21.6 17.8 121
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Basin Index (%) 166 123
LOWER N. PLATTE
Casper Mtn. 7920 14.3 13.6 105 15.6 16.8 93
Laprele Creek 8390 11.6 7.2 161 14.8 13.7 108
Reno Hill 8430 16.4 14.0 117 18.3 17.8 103
Windy Peak 7915 11.2 6.0 187 13.8 12.3 112
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Basin Index (%) 131 103
LARAMIE RIVER
Brooklyn Lake 10250 25.9 23.1 112 28.0 24.6 114
Cinnabar Park 9707 -M 20.1 * 25.4 25.5 100
Crow Creek 8335 2.6 .8 325 10.3 12.2 84
Deadman Hill 10239 20.8 19.4 107 20.7 20.7 100
Rawah 9069 13.4 8.6 156 18.9 18.4 103
Roach 9740 17.9 16.3 110 22.8 21.2 108
Windy Peak 7915 11.2 6.0 187 13.8 12.3 112
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Basin Index (%) 124 104
S. PLATTE
Crow Creek 8335 2.6 .8 325 10.3 12.2 84
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Basin Index (%) 325 84
LITTLE SNAKE RIVER
Battle Mountain 7498 14.0 2.7 519 24.2 17.0 142
Divide Peak 8730 29.7 17.3 172 31.2 24.2 129
Elk River 8739 25.9 14.2 182 30.1 21.8 138
Elkhead Divide 8800 31.3 -M * 33.4 -M *
Little Snake River 8928 38.3 24.2 158 45.3 36.1 125
Old Battle 9860 44.4 35.2 126 44.7 37.0 121
Sage Creek Basin 7850 23.8 2.6 915 21.9 14.4 152
Sandstone RS 8152 22.3 8.0 279 26.9 19.2 140
Whiskey Park 9020 39.0 27.4 142 38.2 31.5 121
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Basin Index (%) 180 130
UPPER GREEN RIVER
Big Sandy Opening 9080 16.6 12.6 132 17.3 14.6 118
Blind Bull Sum 8650 27.8 25.0 111 20.0 19.2 104
East Rim Divide 7930 11.4 8.6 133 13.0 12.0 108
Elkhart Park G.S. 9400 12.8 12.1 106 13.0 13.8 94
Gros Ventre Summit 8750 13.0 12.9 101 12.0 13.9 86
Gunsight Pass 9820 14.9 13.4 111 14.9 15.6 96
Indian Creek 9425 30.5 23.4 130 26.4 20.9 126
Kendall R.S. 7740 12.4 6.6 188 14.2 14.0 101
Larsen Creek 9000 12.1 5.8 209 16.8 15.4 109
Loomis Park 8240 17.1 12.0 142 18.0 17.5 103
New Fork Lake 8340 11.0 7.4 149 -M 11.6 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 15.0 9.4 160 17.3 14.8 117
Spring Creek Divide 9000 30.8 25.4 121 23.3 25.1 93
Triple Peak 8500 27.3 19.9 137 28.4 27.2 104
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Basin Index (%) 130 105
LOWER GREEN RIVER
Blacks Fork Jct 8869 14.7 5.6 262 16.3 13.8 118
Buck Pasture 9632 21.7 -M * 23.8 -M *
EF Blacks Fork GS 9360 15.0 8.4 179 13.5 13.0 104
Hams Fork 7840 15.4 5.6 275 16.3 11.8 138
Henrys Fork 10182 -M -M * 17.0 -M *
Hewinta 9500 15.1 6.7 225 18.1 15.4 118
Hickerson Park 9122 10.9 4.8 227 13.9 11.9 117
Hole-in-Rock 9168 11.4 4.6 248 13.3 11.6 115
Indian Creek 9425 30.5 23.4 130 26.4 20.9 126
Kelley R.S. 8180 22.8 13.0 175 23.7 17.8 133
Spirit Lk 10235 23.0 13.2 174 23.2 19.4 120
Steel Creek Park 10158 22.7 16.8 135 22.2 17.9 124
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Basin Index (%) 178 122
UPPER BEAR RIVER
Bear River RS 8777 12.6 .9 1400* 17.5 13.4 131
Bug Lake 7987 31.7 16.0 198 26.5 19.2 138
Burts Miller Ranch 8000 7.8 .0 * 15.6 8.7 179
Chalk Creek #1 9171 35.8 21.9 163 34.2 24.6 139
Giveout 6930 15.5 .2 7750* 16.9 13.6 124
Hayden Fork 9130 25.4 10.2 249 30.1 22.1 136
Kelley R.S. 8180 22.8 13.0 175 23.7 17.8 133
Lily Lake 9133 17.6 10.2 173 18.9 16.9 112
Monte Cristo 8932 47.4 26.0 182 42.7 27.6 155
Salt River Summit 7640 21.4 10.2 210 21.8 17.4 125
Spring Creek Divide 9000 30.8 25.4 121 23.3 25.1 93
Trial Lake 9992 40.4 22.7 178 36.6 24.2 151
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Basin Index (%) 197 133
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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.
