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 12 , 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 18.8 14.7 128 21.1 20.3 104
Blind Bull Sum 8650 27.5 24.6 112 19.5 17.8 110
Cottonwood Creek 7670 24.7 21.2 117 28.6 25.6 112
East Rim Divide 7930 11.8 10.2 116 12.3 11.4 108
Grand Targhee 9260 46.7 45.3 103 -M 32.4 *
Granite Creek 6770 19.5 14.0 139 16.0 18.6 86
Grassy Lake 7265 36.5 32.2 113 39.3 35.5 111
Gros Ventre Summit 8750 12.8 12.8 100 11.7 12.4 94
Gunsight Pass 9820 13.9 13.0 107 13.6 14.2 96
Lewis Lake Divide 7850 37.3 31.9 117 40.5 33.3 122
Loomis Park 8240 17.0 14.9 114 17.3 16.8 103
Phillips Bench 8200 29.9 26.3 114 30.8 26.8 115
Salt River Summit 7640 21.1 12.3 172 20.7 16.3 127
Snake River Station 6920 19.0 15.2 125 23.1 22.8 101
Somsen Ranch 6800 -M 9.7 * -M 16.7 *
Spring Creek Divide 9000 30.9 25.1 123 -M 23.6 *
Thumb Divide 7980 20.3 15.8 128 19.6 18.2 108
Togwotee Pass 9580 22.7 23.8 95 21.8 24.8 88
Triple Peak 8500 26.5 22.7 117 27.1 25.4 107
Two Ocean Plateau 9240 32.2 30.6 105 27.2 27.3 100
Willow Creek 8080 41.1 29.0 142 36.9 33.6 110
Younts Peak 8350 16.6 14.6 114 14.0 15.1 93
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Basin Index (%) 117 106
MADISON HEADWATERS IN WYOMING
Black Bear 8170 39.2 38.8 101 43.8 37.6 116
Canyon 7870 14.3 -M * 17.2 -M *
Madison Plateau 7750 33.0 23.2 142 30.2 25.2 120
West Yellowstone 6700 15.6 8.6 181 19.6 14.0 140
Whiskey Creek 6800 22.1 15.0 147 26.6 20.4 130
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Basin Index (%) 128 124
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 20.3 22.0 92 18.7 20.4 92
Canyon 7870 14.3 -M * 17.2 -M *
Evening Star 9200 26.6 25.1 106 28.9 28.4 102
Fisher Creek 9100 34.4 34.1 101 35.8 34.0 105
Monument Peak 8850 23.0 21.2 108 24.7 22.1 112
Northeast Entrance 7350 9.4 8.4 112 12.6 13.2 95
Parker Peak 9400 26.0 21.9 119 24.4 20.4 120
Sylvan Lake 8420 20.0 20.1 100 23.9 23.6 101
Thumb Divide 7980 20.3 15.8 128 19.6 18.2 108
Two Ocean Plateau 9240 32.2 30.6 105 27.2 27.3 100
White Mill 8700 25.0 24.8 101 23.8 23.4 102
Wolverine 7650 12.8 8.7 147 13.0 12.8 102
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Basin Index (%) 107 104
WIND RIVER
Burroughs Creek 8750 10.9 -M * 11.2 -M *
Castle Creek 8400 5.6 5.8 97 7.4 8.9 83
Cold Springs 9630 8.0 7.0 114 10.6 9.7 109
Deer Park 9700 24.6 15.2 162 25.6 18.5 138
Hobbs Park 10100 17.0 15.2 112 16.5 14.2 116
Kirwin 9550 10.0 11.0 91 13.4 12.2 110
Little Warm 9370 11.2 10.0 112 13.5 12.0 112
South Pass 9040 20.0 15.4 130 20.7 16.4 126
St. Lawrence Alt 8620 7.8 -M * 11.3 -M *
Togwotee Pass 9580 22.7 23.8 95 21.8 24.8 88
Townsend Creek 8700 12.9 9.8 132 14.6 12.4 118
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Basin Index (%) 117 112
BIGHORN BASIN
Bald Mtn. 9380 20.2 19.5 104 15.7 16.3 96
Bear Trap Meadow 8200 9.2 5.6 164 10.1 9.4 107
Bone Springs Div 9350 16.7 18.0 93 12.6 16.2 78
Grave Springs 8550 10.1 8.6 117 11.8 10.0 118
Kirwin 9550 10.0 11.0 91 13.4 12.2 110
Marquette 8760 9.1 7.7 118 10.7 9.9 108
Middle Powder 7760 12.6 11.3 112 10.7 10.1 106
Owl Creek 8975 7.5 5.5 136 9.2 6.6 139
Powder River Pass 9480 10.2 10.8 94 14.0 13.2 106
Shell Creek 9580 14.2 16.0 89 14.4 14.2 101
Timber Creek 7950 6.2 5.2 119 8.1 8.1 100
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Basin Index (%) 106 104
SHOSHONE RIVER
Blackwater 9780 21.9 24.0 91 22.4 22.6 99
Evening Star 9200 26.6 25.1 106 28.9 28.4 102
Marquette 8760 9.1 7.7 118 10.7 9.9 108
Sylvan Lake 8420 20.0 20.1 100 23.9 23.6 101
Sylvan Road 7120 9.5 10.2 93 14.6 16.5 88
Younts Peak 8350 16.6 14.6 114 14.0 15.1 93
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Basin Index (%) 102 99
POWDER RIVER
Bear Trap Meadow 8200 9.2 5.6 164 10.1 9.4 107
Cloud Peak Reservoir 9860 16.8 15.1 111 15.4 14.1 109
Grave Springs 8550 10.1 8.6 117 11.8 10.0 118
Hansen Sawmill 8360 8.3 6.2 134 9.7 8.8 110
Middle Powder 7760 12.6 11.3 112 10.7 10.1 106
Powder River Pass 9480 10.2 10.8 94 14.0 13.2 106
Soldier Park 8720 8.7 6.0 145 9.3 9.7 96
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Basin Index (%) 119 108
TONGUE RIVER
Big Goose 7990 10.4 9.0 116 11.3 10.6 107
Bone Springs Div 9350 16.7 18.0 93 12.6 16.2 78
Burgess Junction 7880 12.6 11.4 111 14.3 12.6 113
Dome Lake 8880 11.0 11.8 93 12.7 13.6 93
Little Goose 8870 11.0 10.3 107 12.6 12.6 100
Sucker Creek 8880 13.4 12.6 106 17.2 14.7 117
Tie Creek 6870 8.9 4.5 198 13.7 11.3 121
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Basin Index (%) 108 103
BELLE FOURCHE
Blind Park 6890 8.0 5.9 136 11.8 11.8 100
Cole Canyon 5910 7.6 3.8 200 11.0 9.6 115
North Rapid Creek 6130 7.1 5.8 122 9.7 9.5 102
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Basin Index (%) 146 105
CHEYENNE RIVER BASIN
Blind Park 6890 8.0 5.9 136 11.8 11.8 100
North Rapid Creek 6130 7.1 5.8 122 9.7 9.5 102
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Basin Index (%) 129 101
UPPER N. PLATTE
Arapaho Ridge 10976 23.7 22.7 104 24.7 22.4 110
Blackhall Mtn 9839 38.6 30.4 127 38.4 30.3 127
Cinnabar Park 9707 -M 20.7 * 23.4 23.9 98
Columbine 9167 30.6 22.0 139 27.4 25.8 106
Divide Peak 8730 28.1 20.1 140 29.7 21.8 136
Joe Wright 10158 26.9 21.4 126 28.2 26.2 108
Laprele Creek 8390 11.8 9.2 128 13.9 12.0 116
Med Bow 10512 41.0 -M * -M -M *
Never Summer 10323 26.2 20.7 127 19.0 17.8 107
North French Creek 10153 30.4 30.9 98 29.9 27.8 108
Old Battle 9860 42.6 32.2 132 -M 35.2 *
Rawah 9069 13.9 10.0 139 17.2 16.0 108
Sage Creek Basin 7850 26.2 11.3 232 20.8 13.3 156
Sand Lake 10098 29.2 29.2 100 28.3 25.8 110
South Brush Creek 8495 14.3 10.1 142 14.7 14.0 105
Tower 10620 52.8 44.5 119 49.1 40.5 121
Webber Springs 9260 31.1 21.8 143 33.2 25.9 128
Whiskey Park 9020 42.0 26.8 157 36.2 28.0 129
Willow Creek Pass 9523 18.4 13.6 135 17.8 13.9 128
Zirkel 9338 34.4 26.1 132 35.6 31.0 115
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Basin Index (%) 129 117
SWEETWATER
Deer Park 9700 24.6 15.2 162 25.6 18.5 138
Larsen Creek 9000 11.7 8.6 136 15.0 13.8 109
South Pass 9040 20.0 15.4 130 20.7 16.4 126
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Basin Index (%) 144 126
LOWER N. PLATTE
Casper Mtn. 7920 15.3 13.8 111 14.8 14.2 104
Laprele Creek 8390 11.8 9.2 128 13.9 12.0 116
Reno Hill 8430 16.5 14.2 116 17.5 15.8 111
Windy Peak 7915 11.6 7.6 153 13.0 10.5 124
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Basin Index (%) 123 113
LARAMIE RIVER
Brooklyn Lake 10250 25.4 22.6 112 26.2 22.4 117
Cinnabar Park 9707 -M 20.7 * 23.4 23.9 98
Crow Creek 8335 5.0 4.9 102 9.3 10.9 85
Deadman Hill 10239 20.4 16.9 121 18.7 18.2 103
Rawah 9069 13.9 10.0 139 17.2 16.0 108
Roach 9740 18.1 15.2 119 21.2 19.5 109
Windy Peak 7915 11.6 7.6 153 13.0 10.5 124
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Basin Index (%) 122 106
S. PLATTE
Crow Creek 8335 5.0 4.9 102 9.3 10.9 85
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Basin Index (%) 102 85
LITTLE SNAKE RIVER
Battle Mountain 7498 17.2 8.4 205 23.0 15.4 149
Divide Peak 8730 28.1 20.1 140 29.7 21.8 136
Elk River 8739 28.3 16.6 170 28.0 19.9 141
Elkhead Divide 8800 32.6 -M * 31.8 -M *
Little Snake River 8928 38.5 26.2 147 -M 32.8 *
Old Battle 9860 42.6 32.2 132 -M 35.2 *
Sage Creek Basin 7850 26.2 11.3 232 20.8 13.3 156
Sandstone RS 8152 27.6 12.4 223 25.6 18.2 141
Whiskey Park 9020 42.0 26.8 157 36.2 28.0 129
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Basin Index (%) 163 140
UPPER GREEN RIVER
Big Sandy Opening 9080 15.5 13.4 116 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 11.4 108
Elkhart Park G.S. 9400 12.9 12.9 100 12.4 12.9 96
Gros Ventre Summit 8750 12.8 12.8 100 11.7 12.4 94
Gunsight Pass 9820 13.9 13.0 107 13.6 14.2 96
Indian Creek 9425 29.8 23.6 126 25.2 19.8 127
Kendall R.S. 7740 12.5 10.2 123 13.5 13.3 102
Larsen Creek 9000 11.7 8.6 136 15.0 13.8 109
Loomis Park 8240 17.0 14.9 114 17.3 16.8 103
New Fork Lake 8340 11.1 10.2 109 -M 10.8 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 14.0 12.2 115 16.6 14.0 119
Spring Creek Divide 9000 30.9 25.1 123 -M 23.6 *
Triple Peak 8500 26.5 22.7 117 27.1 25.4 107
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Basin Index (%) 116 108
LOWER GREEN RIVER
Blacks Fork Jct 8869 14.6 7.6 192 15.1 12.3 123
Buck Pasture 9632 22.0 -M * 22.4 -M *
EF Blacks Fork GS 9360 14.4 11.6 124 12.3 11.4 108
Hams Fork 7840 17.0 9.5 179 15.5 11.1 140
Henrys Fork 10182 -M -M * 16.0 -M *
Hewinta 9500 12.9 9.9 130 17.0 13.6 125
Hickerson Park 9122 11.9 7.0 170 13.2 10.7 123
Hole-in-Rock 9168 9.8 7.4 132 12.7 10.4 122
Indian Creek 9425 29.8 23.6 126 25.2 19.8 127
Kelley R.S. 8180 21.9 14.6 150 22.6 16.4 138
Spirit Lk 10235 22.1 13.6 162 21.6 18.1 119
Steel Creek Park 10158 20.8 15.4 135 20.7 16.8 123
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Basin Index (%) 146 125
UPPER BEAR RIVER
Bear River RS 8777 13.6 7.4 184 16.6 12.2 136
Bug Lake 7987 31.3 18.5 169 25.6 18.4 139
Burts Miller Ranch 8000 9.7 2.5 388 14.8 8.1 183
Chalk Creek #1 9171 -M 23.1 * -M 23.3 *
Giveout 6930 15.6 5.7 274 16.0 12.5 128
Hayden Fork 9130 23.8 14.2 168 28.6 21.0 136
Kelley R.S. 8180 21.9 14.6 150 22.6 16.4 138
Lily Lake 9133 15.7 12.7 124 18.0 15.4 117
Monte Cristo 8932 45.3 27.3 166 41.5 26.4 157
Salt River Summit 7640 21.1 12.3 172 20.7 16.3 127
Spring Creek Divide 9000 30.9 25.1 123 -M 23.6 *
Trial Lake 9992 38.0 22.2 171 35.3 22.5 157
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Basin Index (%) 164 142
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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.
