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 SATURDAY: APRIL 22 , 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 19.5 13.4 146 22.3 21.6 103
Blind Bull Sum 8650 27.2 25.4 107 19.7 18.8 105
Cottonwood Creek 7670 27.0 20.2 134 30.3 26.8 113
East Rim Divide 7930 11.8 9.4 126 12.6 11.8 107
Grand Targhee 9260 49.4 46.7 106 31.2 34.8 90
Granite Creek 6770 18.8 12.0 157 16.1 19.6 82
Grassy Lake 7265 37.4 31.8 118 41.7 37.4 111
Gros Ventre Summit 8750 12.8 13.2 97 11.8 13.6 87
Gunsight Pass 9820 14.7 13.2 111 14.2 15.0 95
Lewis Lake Divide 7850 39.6 32.8 121 42.5 35.2 121
Loomis Park 8240 17.4 13.0 134 17.8 17.4 102
Phillips Bench 8200 30.8 26.7 115 31.9 27.6 116
Salt River Summit 7640 21.5 11.0 195 21.5 17.1 126
Snake River Station 6920 19.3 14.6 132 24.4 23.4 104
Somsen Ranch 6800 -M 6.4 * -M 17.4 *
Spring Creek Divide 9000 30.3 25.6 118 -M 24.6 *
Thumb Divide 7980 21.4 17.0 126 20.5 19.6 105
Togwotee Pass 9580 23.6 24.9 95 22.5 26.1 86
Triple Peak 8500 27.1 20.8 130 27.8 27.0 103
Two Ocean Plateau 9240 34.7 32.4 107 29.3 28.6 102
Willow Creek 8080 39.5 28.4 139 39.2 35.2 111
Younts Peak 8350 16.2 15.2 107 14.2 16.4 87
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Basin Index (%) 121 104
MADISON HEADWATERS IN WYOMING
Black Bear 8170 45.8 39.5 116 46.4 39.2 118
Canyon 7870 15.1 -M * 18.4 -M *
Madison Plateau 7750 32.0 23.6 136 31.6 25.9 122
West Yellowstone 6700 15.5 6.1 254 20.2 15.4 131
Whiskey Creek 6800 22.2 15.7 141 27.6 21.8 127
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Basin Index (%) 136 123
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 20.8 23.8 87 19.7 22.0 90
Canyon 7870 15.1 -M * 18.4 -M *
Evening Star 9200 28.1 27.0 104 30.7 30.5 101
Fisher Creek 9100 36.0 35.6 101 37.2 35.6 104
Monument Peak 8850 23.5 22.2 106 26.2 23.8 110
Northeast Entrance 7350 9.1 6.2 147 13.6 14.0 97
Parker Peak 9400 28.2 24.0 118 26.2 21.3 123
Sylvan Lake 8420 21.4 20.8 103 26.0 25.0 104
Thumb Divide 7980 21.4 17.0 126 20.5 19.6 105
Two Ocean Plateau 9240 34.7 32.4 107 29.3 28.6 102
White Mill 8700 26.3 25.8 102 24.8 24.2 102
Wolverine 7650 12.9 7.2 179 13.6 13.2 103
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Basin Index (%) 108 104
WIND RIVER
Burroughs Creek 8750 10.7 -M * 11.6 -M *
Castle Creek 8400 4.5 3.6 125 7.8 9.0 87
Cold Springs 9630 7.5 6.2 121 11.0 10.1 109
Deer Park 9700 24.4 15.9 153 26.0 20.3 128
Hobbs Park 10100 16.9 15.5 109 16.7 14.8 113
Kirwin 9550 10.8 11.6 93 13.8 13.6 101
Little Warm 9370 11.3 10.2 111 14.0 12.8 109
South Pass 9040 19.7 15.3 129 20.8 17.4 120
St. Lawrence Alt 8620 6.7 -M * 11.4 -M *
Togwotee Pass 9580 23.6 24.9 95 22.5 26.1 86
Townsend Creek 8700 12.4 9.7 128 14.8 13.1 113
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Basin Index (%) 116 107
BIGHORN BASIN
Bald Mtn. 9380 19.9 19.7 101 16.8 17.2 98
Bear Trap Meadow 8200 8.3 3.6 231 10.6 10.2 104
Bone Springs Div 9350 17.0 17.6 97 13.4 17.2 78
Grave Springs 8550 9.6 8.2 117 12.4 11.0 113
Kirwin 9550 10.8 11.6 93 13.8 13.6 101
Marquette 8760 9.5 7.8 122 11.2 10.8 104
Middle Powder 7760 12.7 11.8 108 11.1 11.2 99
Owl Creek 8975 6.5 3.6 181 9.8 7.2 136
Powder River Pass 9480 10.7 10.6 101 15.1 14.5 104
Shell Creek 9580 14.9 16.5 90 15.5 15.2 102
Timber Creek 7950 6.1 4.9 124 8.7 9.1 96
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Basin Index (%) 109 101
SHOSHONE RIVER
Blackwater 9780 23.6 25.4 93 24.1 24.2 100
Evening Star 9200 28.1 27.0 104 30.7 30.5 101
Marquette 8760 9.5 7.8 122 11.2 10.8 104
Sylvan Lake 8420 21.4 20.8 103 26.0 25.0 104
Sylvan Road 7120 8.5 9.1 93 16.2 17.6 92
Younts Peak 8350 16.2 15.2 107 14.2 16.4 87
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Basin Index (%) 102 98
POWDER RIVER
Bear Trap Meadow 8200 8.3 3.6 231 10.6 10.2 104
Cloud Peak Reservoir 9860 15.6 15.7 99 16.0 15.1 106
Grave Springs 8550 9.6 8.2 117 12.4 11.0 113
Hansen Sawmill 8360 7.5 5.2 144 10.2 9.9 103
Middle Powder 7760 12.7 11.8 108 11.1 11.2 99
Powder River Pass 9480 10.7 10.6 101 15.1 14.5 104
Soldier Park 8720 8.0 6.5 123 9.6 10.8 89
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Basin Index (%) 118 103
TONGUE RIVER
Big Goose 7990 10.4 8.6 121 11.8 11.4 104
Bone Springs Div 9350 17.0 17.6 97 13.4 17.2 78
Burgess Junction 7880 12.5 12.0 104 14.5 13.8 105
Dome Lake 8880 11.1 11.8 94 12.9 14.8 87
Little Goose 8870 10.3 10.5 98 13.0 14.0 93
Sucker Creek 8880 13.0 12.8 102 17.6 15.8 111
Tie Creek 6870 8.2 4.4 186 13.9 12.9 108
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Basin Index (%) 106 97
BELLE FOURCHE
Blind Park 6890 5.2 3.9 133 12.3 12.5 98
Cole Canyon 5910 5.8 2.2 264 11.6 10.2 114
North Rapid Creek 6130 4.7 3.9 121 10.2 10.3 99
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Basin Index (%) 157 103
CHEYENNE RIVER BASIN
Blind Park 6890 5.2 3.9 133 12.3 12.5 98
North Rapid Creek 6130 4.7 3.9 121 10.2 10.3 99
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Basin Index (%) 127 99
UPPER N. PLATTE
Arapaho Ridge 10976 26.8 23.9 112 26.0 24.0 108
Blackhall Mtn 9839 38.7 32.9 118 39.4 31.8 124
Cinnabar Park 9707 -M 19.7 * 24.8 24.7 100
Columbine 9167 26.8 21.0 128 28.1 27.0 104
Divide Peak 8730 29.0 18.7 155 30.5 23.3 131
Joe Wright 10158 26.0 22.2 117 29.9 28.6 105
Laprele Creek 8390 11.9 7.1 168 14.5 13.2 110
Med Bow 10512 40.9 -M * 37.0 -M *
Never Summer 10323 27.4 22.0 125 20.1 18.8 107
North French Creek 10153 30.9 31.6 98 31.9 30.2 106
Old Battle 9860 43.7 33.8 129 43.5 36.0 121
Rawah 9069 13.8 9.8 141 18.4 17.4 106
Sage Creek Basin 7850 24.7 6.0 412 21.5 13.8 156
Sand Lake 10098 29.9 30.5 98 29.8 27.0 110
South Brush Creek 8495 12.7 8.8 144 15.6 15.0 104
Tower 10620 53.2 46.0 116 53.2 42.4 125
Webber Springs 9260 29.7 22.0 135 33.8 27.6 122
Whiskey Park 9020 38.8 26.7 145 37.5 30.0 125
Willow Creek Pass 9523 19.4 14.8 131 18.7 14.8 126
Zirkel 9338 31.1 25.5 122 36.9 33.2 111
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Basin Index (%) 128 116
SWEETWATER
Deer Park 9700 24.4 15.9 153 26.0 20.3 128
Larsen Creek 9000 10.5 7.6 138 15.3 15.1 101
South Pass 9040 19.7 15.3 129 20.8 17.4 120
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Basin Index (%) 141 118
LOWER N. PLATTE
Casper Mtn. 7920 14.7 13.8 107 15.4 15.6 99
Laprele Creek 8390 11.9 7.1 168 14.5 13.2 110
Reno Hill 8430 16.4 14.0 117 18.0 17.2 105
Windy Peak 7915 10.8 7.0 154 13.4 11.5 117
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Basin Index (%) 128 107
LARAMIE RIVER
Brooklyn Lake 10250 25.3 22.6 112 27.4 23.8 115
Cinnabar Park 9707 -M 19.7 * 24.8 24.7 100
Crow Creek 8335 3.0 2.7 111 9.8 11.9 82
Deadman Hill 10239 20.3 18.2 112 19.9 19.6 102
Rawah 9069 13.8 9.8 141 18.4 17.4 106
Roach 9740 17.8 16.4 109 22.2 20.7 107
Windy Peak 7915 10.8 7.0 154 13.4 11.5 117
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Basin Index (%) 119 105
S. PLATTE
Crow Creek 8335 3.0 2.7 111 9.8 11.9 82
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Basin Index (%) 111 82
LITTLE SNAKE RIVER
Battle Mountain 7498 14.8 4.8 308 23.8 16.4 145
Divide Peak 8730 29.0 18.7 155 30.5 23.3 131
Elk River 8739 26.1 14.8 176 29.3 21.0 140
Elkhead Divide 8800 31.3 -M * 32.6 -M *
Little Snake River 8928 38.1 23.5 162 44.4 34.4 129
Old Battle 9860 43.7 33.8 129 43.5 36.0 121
Sage Creek Basin 7850 24.7 6.0 412 21.5 13.8 156
Sandstone RS 8152 23.0 9.8 235 26.4 19.0 139
Whiskey Park 9020 38.8 26.7 145 37.5 30.0 125
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Basin Index (%) 172 132
UPPER GREEN RIVER
Big Sandy Opening 9080 15.4 13.0 118 16.2 14.0 116
Blind Bull Sum 8650 27.2 25.4 107 19.7 18.8 105
East Rim Divide 7930 11.8 9.4 126 12.6 11.8 107
Elkhart Park G.S. 9400 12.9 13.1 98 12.5 13.4 93
Gros Ventre Summit 8750 12.8 13.2 97 11.8 13.6 87
Gunsight Pass 9820 14.7 13.2 111 14.2 15.0 95
Indian Creek 9425 30.4 24.1 126 26.0 20.6 126
Kendall R.S. 7740 12.6 8.2 154 13.9 13.9 100
Larsen Creek 9000 10.5 7.6 138 15.3 15.1 101
Loomis Park 8240 17.4 13.0 134 17.8 17.4 102
New Fork Lake 8340 11.2 9.0 124 -M 11.2 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 15.0 10.3 146 17.1 14.5 118
Spring Creek Divide 9000 30.3 25.6 118 -M 24.6 *
Triple Peak 8500 27.1 20.8 130 27.8 27.0 103
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Basin Index (%) 121 105
LOWER GREEN RIVER
Blacks Fork Jct 8869 14.4 6.6 218 15.8 13.4 118
Buck Pasture 9632 20.6 -M * 22.8 -M *
EF Blacks Fork GS 9360 14.7 10.7 137 12.9 12.6 102
Hams Fork 7840 16.0 6.9 232 16.1 11.5 140
Henrys Fork 10182 -M -M * 16.8 -M *
Hewinta 9500 13.6 7.2 189 17.4 15.2 114
Hickerson Park 9122 9.9 5.0 198 13.3 11.4 117
Hole-in-Rock 9168 10.0 5.9 169 12.8 11.2 114
Indian Creek 9425 30.4 24.1 126 26.0 20.6 126
Kelley R.S. 8180 22.7 13.9 163 23.2 17.4 133
Spirit Lk 10235 22.2 13.1 169 22.3 19.3 116
Steel Creek Park 10158 21.7 16.2 134 20.9 17.4 120
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Basin Index (%) 160 120
UPPER BEAR RIVER
Bear River RS 8777 12.1 2.4 504 17.1 13.0 132
Bug Lake 7987 31.6 16.8 188 26.2 18.8 139
Burts Miller Ranch 8000 7.8 .0 * 15.1 8.7 174
Chalk Creek #1 9171 34.9 22.0 159 33.4 24.2 138
Giveout 6930 15.5 2.0 775 16.7 13.3 126
Hayden Fork 9130 24.7 10.9 227 29.3 21.9 134
Kelley R.S. 8180 22.7 13.9 163 23.2 17.4 133
Lily Lake 9133 16.7 11.0 152 18.5 16.2 114
Monte Cristo 8932 46.9 26.0 180 -M 27.0 *
Salt River Summit 7640 21.5 11.0 195 21.5 17.1 126
Spring Creek Divide 9000 30.3 25.6 118 -M 24.6 *
Trial Lake 9992 39.9 22.4 178 35.6 23.4 152
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Basin Index (%) 186 136
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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.
