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 11 , 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 15.2 128 21.1 20.2 104
Blind Bull Sum 8650 27.5 24.6 112 19.5 17.8 110
Cottonwood Creek 7670 25.0 21.2 118 28.6 25.5 112
East Rim Divide 7930 11.8 10.2 116 12.3 11.2 110
Grand Targhee 9260 46.1 44.9 103 23.5 32.4 73
Granite Creek 6770 19.8 14.2 139 16.0 18.6 86
Grassy Lake 7265 36.3 32.3 112 39.3 35.4 111
Gros Ventre Summit 8750 13.4 12.8 105 11.8 12.4 95
Gunsight Pass 9820 14.2 13.0 109 13.5 14.1 96
Lewis Lake Divide 7850 37.9 31.8 119 40.3 33.2 121
Loomis Park 8240 17.6 15.0 117 17.3 16.8 103
Phillips Bench 8200 30.7 26.3 117 31.1 26.6 117
Salt River Summit 7640 21.5 12.6 171 20.6 16.3 126
Snake River Station 6920 20.4 15.4 132 23.1 22.6 102
Somsen Ranch 6800 -M 9.7 * -M 16.6 *
Spring Creek Divide 9000 30.2 25.1 120 21.9 23.6 93
Thumb Divide 7980 20.7 16.0 129 19.6 18.0 109
Togwotee Pass 9580 23.1 23.8 97 21.8 24.8 88
Triple Peak 8500 27.7 23.0 120 27.1 25.4 107
Two Ocean Plateau 9240 30.9 30.4 102 27.2 27.0 101
Willow Creek 8080 41.5 29.4 141 36.9 33.5 110
Younts Peak 8350 16.9 14.6 116 14.0 15.0 93
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Basin Index (%) 118 103
MADISON HEADWATERS IN WYOMING
Black Bear 8170 41.5 38.6 108 43.7 37.6 116
Canyon 7870 14.5 -M * 17.2 -M *
Madison Plateau 7750 32.6 23.2 141 30.2 25.2 120
West Yellowstone 6700 16.4 9.0 182 19.7 14.0 141
Whiskey Creek 6800 22.2 14.8 150 26.6 20.2 132
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Basin Index (%) 132 124
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 20.5 22.0 93 18.8 20.2 93
Canyon 7870 14.5 -M * 17.2 -M *
Evening Star 9200 27.0 25.2 107 28.9 28.4 102
Fisher Creek 9100 34.2 34.0 101 35.8 33.8 106
Monument Peak 8850 23.5 21.0 112 24.7 21.8 113
Northeast Entrance 7350 9.9 8.4 118 12.6 13.1 96
Parker Peak 9400 26.0 21.8 119 24.4 20.4 120
Sylvan Lake 8420 20.0 19.8 101 23.9 23.6 101
Thumb Divide 7980 20.7 16.0 129 19.6 18.0 109
Two Ocean Plateau 9240 30.9 30.4 102 27.2 27.0 101
White Mill 8700 24.4 24.8 98 23.8 23.2 103
Wolverine 7650 13.4 8.9 151 13.0 12.8 102
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Basin Index (%) 108 104
WIND RIVER
Burroughs Creek 8750 11.5 -M * 11.2 -M *
Castle Creek 8400 6.1 5.8 105 7.5 8.8 85
Cold Springs 9630 8.5 7.0 121 10.6 9.7 109
Deer Park 9700 25.0 15.5 161 25.6 18.5 138
Hobbs Park 10100 17.2 14.8 116 16.4 13.9 118
Kirwin 9550 10.8 11.0 98 13.5 12.2 111
Little Warm 9370 11.4 10.0 114 13.5 11.9 113
South Pass 9040 20.4 15.2 134 20.6 16.2 127
St. Lawrence Alt 8620 8.7 -M * 11.2 -M *
Togwotee Pass 9580 23.1 23.8 97 21.8 24.8 88
Townsend Creek 8700 13.2 9.9 133 14.6 11.8 124
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Basin Index (%) 120 113
BIGHORN BASIN
Bald Mtn. 9380 20.6 19.8 104 15.7 16.2 97
Bear Trap Meadow 8200 9.5 5.6 170 10.1 9.4 107
Bone Springs Div 9350 16.5 17.6 94 12.6 16.2 78
Grave Springs 8550 10.5 8.4 125 11.8 9.9 119
Kirwin 9550 10.8 11.0 98 13.5 12.2 111
Marquette 8760 9.6 7.6 126 10.7 9.6 111
Middle Powder 7760 13.0 11.2 116 10.7 10.1 106
Owl Creek 8975 8.0 5.5 145 9.2 6.5 142
Powder River Pass 9480 10.6 10.8 98 14.0 13.1 107
Shell Creek 9580 14.4 16.0 90 14.4 14.0 103
Timber Creek 7950 6.6 5.2 127 8.1 8.1 100
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Basin Index (%) 110 104
SHOSHONE RIVER
Blackwater 9780 22.1 23.6 94 22.5 22.6 100
Evening Star 9200 27.0 25.2 107 28.9 28.4 102
Marquette 8760 9.6 7.6 126 10.7 9.6 111
Sylvan Lake 8420 20.0 19.8 101 23.9 23.6 101
Sylvan Road 7120 10.2 10.3 99 14.6 16.5 88
Younts Peak 8350 16.9 14.6 116 14.0 15.0 93
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Basin Index (%) 105 99
POWDER RIVER
Bear Trap Meadow 8200 9.5 5.6 170 10.1 9.4 107
Cloud Peak Reservoir 9860 16.2 14.9 109 15.4 13.8 112
Grave Springs 8550 10.5 8.4 125 11.8 9.9 119
Hansen Sawmill 8360 9.0 6.1 148 9.8 8.8 111
Middle Powder 7760 13.0 11.2 116 10.7 10.1 106
Powder River Pass 9480 10.6 10.8 98 14.0 13.1 107
Soldier Park 8720 9.6 6.6 145 9.3 9.5 98
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Basin Index (%) 123 109
TONGUE RIVER
Big Goose 7990 10.5 8.9 118 11.3 10.5 108
Bone Springs Div 9350 16.5 17.6 94 12.6 16.2 78
Burgess Junction 7880 13.0 11.4 114 14.4 12.6 114
Dome Lake 8880 11.9 11.9 100 12.6 13.4 94
Little Goose 8870 11.7 10.0 117 12.6 12.6 100
Sucker Creek 8880 14.1 12.8 110 17.2 14.6 118
Tie Creek 6870 9.9 4.6 215 13.7 11.2 122
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Basin Index (%) 113 104
BELLE FOURCHE
Blind Park 6890 9.0 6.1 148 11.8 11.7 101
Cole Canyon 5910 8.4 3.8 221 11.0 9.5 116
North Rapid Creek 6130 7.8 5.4 144 9.7 9.2 105
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Basin Index (%) 165 107
CHEYENNE RIVER BASIN
Blind Park 6890 9.0 6.1 148 11.8 11.7 101
North Rapid Creek 6130 7.8 5.4 144 9.7 9.2 105
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Basin Index (%) 146 103
UPPER N. PLATTE
Arapaho Ridge 10976 25.8 22.6 114 24.7 22.2 111
Blackhall Mtn 9839 40.8 30.3 135 38.4 30.3 127
Cinnabar Park 9707 -M 20.5 * 23.5 23.8 99
Columbine 9167 31.5 22.4 141 27.4 25.8 106
Divide Peak 8730 29.2 19.9 147 29.7 21.8 136
Joe Wright 10158 26.9 21.2 127 28.2 26.2 108
Laprele Creek 8390 12.4 9.4 132 13.9 11.9 117
Med Bow 10512 42.5 -M * -M -M *
Never Summer 10323 26.2 20.8 126 19.0 17.8 107
North French Creek 10153 31.8 30.6 104 29.9 27.6 108
Old Battle 9860 42.7 32.0 133 -M 35.2 *
Rawah 9069 14.6 10.2 143 17.2 16.0 108
Sage Creek Basin 7850 26.4 11.0 240 20.8 13.3 156
Sand Lake 10098 29.5 28.6 103 28.2 25.8 109
South Brush Creek 8495 14.9 10.4 143 14.7 13.8 107
Tower 10620 53.0 44.4 119 -M 40.1 *
Webber Springs 9260 31.9 22.4 142 33.2 25.8 129
Whiskey Park 9020 43.0 26.9 160 36.2 28.0 129
Willow Creek Pass 9523 18.3 13.4 137 17.8 13.7 130
Zirkel 9338 35.3 26.9 131 35.6 30.8 116
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Basin Index (%) 132 117
SWEETWATER
Deer Park 9700 25.0 15.5 161 25.6 18.5 138
Larsen Creek 9000 12.0 8.8 136 15.0 13.7 109
South Pass 9040 20.4 15.2 134 20.6 16.2 127
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Basin Index (%) 145 126
LOWER N. PLATTE
Casper Mtn. 7920 15.7 13.7 115 14.7 13.8 107
Laprele Creek 8390 12.4 9.4 132 13.9 11.9 117
Reno Hill 8430 16.7 14.0 119 17.6 15.8 111
Windy Peak 7915 12.0 7.6 158 13.0 10.4 125
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Basin Index (%) 127 114
LARAMIE RIVER
Brooklyn Lake 10250 26.0 22.4 116 26.2 22.4 117
Cinnabar Park 9707 -M 20.5 * 23.5 23.8 99
Crow Creek 8335 5.6 4.8 117 9.3 10.7 87
Deadman Hill 10239 20.8 16.7 125 18.6 18.1 103
Rawah 9069 14.6 10.2 143 17.2 16.0 108
Roach 9740 18.2 15.4 118 21.2 19.4 109
Windy Peak 7915 12.0 7.6 158 13.0 10.4 125
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Basin Index (%) 126 107
S. PLATTE
Crow Creek 8335 5.6 4.8 117 9.3 10.7 87
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Basin Index (%) 117 87
LITTLE SNAKE RIVER
Battle Mountain 7498 18.0 8.6 209 23.0 15.4 149
Divide Peak 8730 29.2 19.9 147 29.7 21.8 136
Elk River 8739 29.5 17.3 171 28.0 19.8 141
Elkhead Divide 8800 33.4 -M * 31.8 -M *
Little Snake River 8928 39.3 26.3 149 -M 32.8 *
Old Battle 9860 42.7 32.0 133 -M 35.2 *
Sage Creek Basin 7850 26.4 11.0 240 20.8 13.3 156
Sandstone RS 8152 -M 12.8 * 25.8 18.2 142
Whiskey Park 9020 43.0 26.9 160 36.2 28.0 129
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Basin Index (%) 161 140
UPPER GREEN RIVER
Big Sandy Opening 9080 15.0 13.3 113 15.8 13.5 117
Blind Bull Sum 8650 27.5 24.6 112 19.5 17.8 110
East Rim Divide 7930 11.8 10.2 116 12.3 11.2 110
Elkhart Park G.S. 9400 12.9 13.0 99 12.3 12.9 95
Gros Ventre Summit 8750 13.4 12.8 105 11.8 12.4 95
Gunsight Pass 9820 14.2 13.0 109 13.5 14.1 96
Indian Creek 9425 30.3 23.6 128 25.2 19.7 128
Kendall R.S. 7740 13.2 10.2 129 13.5 13.3 102
Larsen Creek 9000 12.0 8.8 136 15.0 13.7 109
Loomis Park 8240 17.6 15.0 117 17.3 16.8 103
New Fork Lake 8340 11.4 10.4 110 -M 10.8 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 14.6 12.4 118 16.6 13.9 119
Spring Creek Divide 9000 30.2 25.1 120 21.9 23.6 93
Triple Peak 8500 27.7 23.0 120 27.1 25.4 107
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Basin Index (%) 117 106
LOWER GREEN RIVER
Blacks Fork Jct 8869 14.9 7.9 189 15.1 12.2 124
Buck Pasture 9632 22.0 -M * 22.4 -M *
EF Blacks Fork GS 9360 15.3 11.8 130 12.3 11.4 108
Hams Fork 7840 16.9 10.1 167 15.4 11.1 139
Henrys Fork 10182 -M -M * 16.0 -M *
Hewinta 9500 14.3 10.0 143 17.0 13.6 125
Hickerson Park 9122 12.8 7.2 178 13.2 10.6 125
Hole-in-Rock 9168 11.2 7.4 151 12.7 10.4 122
Indian Creek 9425 30.3 23.6 128 25.2 19.7 128
Kelley R.S. 8180 22.1 14.6 151 22.6 16.4 138
Spirit Lk 10235 22.6 13.8 164 21.6 17.9 121
Steel Creek Park 10158 20.9 15.3 137 20.7 16.8 123
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Basin Index (%) 149 125
UPPER BEAR RIVER
Bear River RS 8777 15.0 7.8 192 16.6 12.1 137
Bug Lake 7987 31.6 18.4 172 25.6 18.4 139
Burts Miller Ranch 8000 11.2 3.0 373 14.8 8.0 185
Chalk Creek #1 9171 -M 23.4 * -M 23.2 *
Giveout 6930 16.2 6.2 261 15.9 12.4 128
Hayden Fork 9130 25.1 14.4 174 28.6 20.9 137
Kelley R.S. 8180 22.1 14.6 151 22.6 16.4 138
Lily Lake 9133 16.7 12.8 130 18.0 15.4 117
Monte Cristo 8932 45.7 27.2 168 41.5 26.4 157
Salt River Summit 7640 21.5 12.6 171 20.6 16.3 126
Spring Creek Divide 9000 30.2 25.1 120 21.9 23.6 93
Trial Lake 9992 38.0 22.2 171 35.3 22.4 158
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Basin Index (%) 166 136
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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.
