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 FRIDAY: APRIL 14 , 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 19.0 14.8 128 21.7 20.6 105
Blind Bull Sum 8650 27.1 24.5 111 19.5 17.8 110
Cottonwood Creek 7670 25.4 20.4 125 28.7 26.0 110
East Rim Divide 7930 11.9 9.8 121 12.1 11.4 106
Grand Targhee 9260 48.1 45.5 106 -M 33.2 *
Granite Creek 6770 19.2 13.4 143 16.0 18.7 86
Grassy Lake 7265 36.7 32.3 114 39.4 35.8 110
Gros Ventre Summit 8750 12.7 12.8 99 11.8 12.6 94
Gunsight Pass 9820 13.6 12.7 107 13.3 14.4 92
Lewis Lake Divide 7850 37.9 32.2 118 41.2 33.4 123
Loomis Park 8240 17.3 14.6 118 17.3 17.0 102
Phillips Bench 8200 30.3 26.0 117 31.1 26.9 116
Salt River Summit 7640 20.7 11.8 175 20.5 16.4 125
Snake River Station 6920 19.5 15.0 130 23.6 22.8 104
Somsen Ranch 6800 -M 9.4 * -M 16.8 *
Spring Creek Divide 9000 30.7 25.2 122 -M 24.0 *
Thumb Divide 7980 20.7 16.0 129 19.9 18.3 109
Togwotee Pass 9580 23.0 24.0 96 21.9 25.0 88
Triple Peak 8500 26.5 22.2 119 26.9 25.6 105
Two Ocean Plateau 9240 33.7 31.0 109 28.2 27.4 103
Willow Creek 8080 39.2 28.2 139 37.0 34.2 108
Younts Peak 8350 16.0 14.4 111 13.7 15.2 90
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Basin Index (%) 118 106
MADISON HEADWATERS IN WYOMING
Black Bear 8170 41.8 38.5 109 44.6 37.7 118
Canyon 7870 15.0 -M * 17.9 -M *
Madison Plateau 7750 32.6 23.0 142 30.8 25.3 122
West Yellowstone 6700 15.1 8.0 189 19.9 14.0 142
Whiskey Creek 6800 22.0 15.0 147 26.9 20.8 129
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Basin Index (%) 132 125
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 20.5 22.4 92 19.0 20.6 92
Canyon 7870 15.0 -M * 17.9 -M *
Evening Star 9200 27.3 25.7 106 29.6 28.8 103
Fisher Creek 9100 35.4 34.2 104 36.3 34.0 107
Monument Peak 8850 23.0 21.4 107 25.4 22.8 111
Northeast Entrance 7350 9.5 8.0 119 13.2 13.4 99
Parker Peak 9400 26.6 22.6 118 25.0 20.6 121
Sylvan Lake 8420 20.5 19.8 104 25.0 24.0 104
Thumb Divide 7980 20.7 16.0 129 19.9 18.3 109
Two Ocean Plateau 9240 33.7 31.0 109 28.2 27.4 103
White Mill 8700 25.8 25.0 103 24.4 23.4 104
Wolverine 7650 12.5 8.4 149 13.3 12.8 104
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Basin Index (%) 109 105
WIND RIVER
Burroughs Creek 8750 10.3 -M * 11.2 -M *
Castle Creek 8400 5.2 5.8 90 7.2 9.0 80
Cold Springs 9630 7.5 6.9 109 10.5 9.7 108
Deer Park 9700 24.5 15.2 161 25.5 18.9 135
Hobbs Park 10100 17.1 15.4 111 16.2 14.2 114
Kirwin 9550 9.1 11.1 82 13.2 12.5 106
Little Warm 9370 10.8 10.0 108 13.2 12.0 110
South Pass 9040 19.8 15.8 125 20.7 16.4 126
St. Lawrence Alt 8620 6.8 -M * 10.9 -M *
Togwotee Pass 9580 23.0 24.0 96 21.9 25.0 88
Townsend Creek 8700 12.4 9.8 127 14.4 12.7 113
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Basin Index (%) 114 110
BIGHORN BASIN
Bald Mtn. 9380 19.4 19.5 99 15.6 16.4 95
Bear Trap Meadow 8200 8.3 5.2 160 9.9 9.4 105
Bone Springs Div 9350 15.8 18.0 88 12.4 16.4 76
Grave Springs 8550 9.4 8.8 107 11.7 10.6 110
Kirwin 9550 9.1 11.1 82 13.2 12.5 106
Marquette 8760 9.1 7.8 117 10.7 10.0 107
Middle Powder 7760 12.0 11.4 105 10.6 10.2 104
Owl Creek 8975 7.2 5.2 138 9.1 6.6 138
Powder River Pass 9480 9.9 10.5 94 13.9 13.5 103
Shell Creek 9580 14.0 15.9 88 14.4 14.2 101
Timber Creek 7950 6.1 5.2 117 8.1 8.3 98
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Basin Index (%) 101 101
SHOSHONE RIVER
Blackwater 9780 22.5 24.2 93 22.9 23.2 99
Evening Star 9200 27.3 25.7 106 29.6 28.8 103
Marquette 8760 9.1 7.8 117 10.7 10.0 107
Sylvan Lake 8420 20.5 19.8 104 25.0 24.0 104
Sylvan Road 7120 9.4 10.2 92 15.6 16.6 94
Younts Peak 8350 16.0 14.4 111 13.7 15.2 90
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Basin Index (%) 103 100
POWDER RIVER
Bear Trap Meadow 8200 8.3 5.2 160 9.9 9.4 105
Cloud Peak Reservoir 9860 15.2 15.4 99 15.2 14.4 106
Grave Springs 8550 9.4 8.8 107 11.7 10.6 110
Hansen Sawmill 8360 7.4 6.1 121 9.6 9.0 107
Middle Powder 7760 12.0 11.4 105 10.6 10.2 104
Powder River Pass 9480 9.9 10.5 94 13.9 13.5 103
Soldier Park 8720 7.7 6.2 124 9.2 10.1 91
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Basin Index (%) 110 104
TONGUE RIVER
Big Goose 7990 10.2 8.9 115 11.5 10.7 107
Bone Springs Div 9350 15.8 18.0 88 12.4 16.4 76
Burgess Junction 7880 12.4 11.4 109 14.2 12.8 111
Dome Lake 8880 10.8 11.8 92 12.3 13.6 90
Little Goose 8870 10.5 10.4 101 12.6 12.9 98
Sucker Creek 8880 12.7 12.7 100 17.0 14.9 114
Tie Creek 6870 8.6 4.2 205 13.6 11.5 118
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Basin Index (%) 105 101
BELLE FOURCHE
Blind Park 6890 6.6 4.8 138 11.8 11.9 99
Cole Canyon 5910 6.8 3.4 200 10.9 9.6 114
North Rapid Creek 6130 6.2 5.6 111 9.8 9.6 102
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Basin Index (%) 142 105
CHEYENNE RIVER BASIN
Blind Park 6890 6.6 4.8 138 11.8 11.9 99
North Rapid Creek 6130 6.2 5.6 111 9.8 9.6 102
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Basin Index (%) 123 100
UPPER N. PLATTE
Arapaho Ridge 10976 24.3 23.0 106 24.7 22.6 109
Blackhall Mtn 9839 37.0 30.8 120 38.3 30.4 126
Cinnabar Park 9707 -M 20.9 * 23.4 24.1 97
Columbine 9167 28.2 21.3 132 27.3 26.0 105
Divide Peak 8730 27.6 20.1 137 29.7 22.0 135
Joe Wright 10158 25.9 21.6 120 28.2 26.4 107
Laprele Creek 8390 11.4 8.8 130 13.8 12.2 113
Med Bow 10512 38.2 -M * 34.8 -M *
Never Summer 10323 25.8 20.9 123 19.0 17.8 107
North French Creek 10153 29.0 31.4 92 29.9 28.2 106
Old Battle 9860 42.5 32.2 132 -M 35.4 *
Rawah 9069 12.7 10.4 122 17.1 16.3 105
Sage Creek Basin 7850 25.2 10.4 242 20.9 13.3 157
Sand Lake 10098 28.3 29.6 96 28.2 26.0 108
South Brush Creek 8495 12.7 10.3 123 14.7 14.1 104
Tower 10620 52.2 44.7 117 48.7 40.8 119
Webber Springs 9260 29.4 21.4 137 33.2 26.0 128
Whiskey Park 9020 38.6 26.6 145 36.2 28.0 129
Willow Creek Pass 9523 18.2 14.2 128 17.8 14.4 124
Zirkel 9338 32.1 25.4 126 35.6 31.2 114
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Basin Index (%) 124 116
SWEETWATER
Deer Park 9700 24.5 15.2 161 25.5 18.9 135
Larsen Creek 9000 10.9 8.3 131 14.8 14.0 106
South Pass 9040 19.8 15.8 125 20.7 16.4 126
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Basin Index (%) 140 124
LOWER N. PLATTE
Casper Mtn. 7920 14.2 13.8 103 14.8 14.5 102
Laprele Creek 8390 11.4 8.8 130 13.8 12.2 113
Reno Hill 8430 16.0 14.4 111 17.4 16.4 106
Windy Peak 7915 10.6 7.2 147 12.9 10.8 119
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Basin Index (%) 118 109
LARAMIE RIVER
Brooklyn Lake 10250 24.2 22.4 108 26.2 22.7 115
Cinnabar Park 9707 -M 20.9 * 23.4 24.1 97
Crow Creek 8335 3.5 5.0 70 9.3 11.0 85
Deadman Hill 10239 18.8 16.5 114 18.7 18.6 101
Rawah 9069 12.7 10.4 122 17.1 16.3 105
Roach 9740 17.2 15.9 108 21.3 19.9 107
Windy Peak 7915 10.6 7.2 147 12.9 10.8 119
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Basin Index (%) 112 104
S. PLATTE
Crow Creek 8335 3.5 5.0 70 9.3 11.0 85
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Basin Index (%) 70 85
LITTLE SNAKE RIVER
Battle Mountain 7498 15.3 7.8 196 23.0 15.8 146
Divide Peak 8730 27.6 20.1 137 29.7 22.0 135
Elk River 8739 25.8 16.2 159 28.0 20.0 140
Elkhead Divide 8800 30.6 -M * 31.8 -M *
Little Snake River 8928 36.9 25.7 144 43.4 32.9 132
Old Battle 9860 42.5 32.2 132 -M 35.4 *
Sage Creek Basin 7850 25.2 10.4 242 20.9 13.3 157
Sandstone RS 8152 24.2 12.1 200 25.6 18.4 139
Whiskey Park 9020 38.6 26.6 145 36.2 28.0 129
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Basin Index (%) 156 138
UPPER GREEN RIVER
Big Sandy Opening 9080 15.1 13.5 112 15.7 13.5 116
Blind Bull Sum 8650 27.1 24.5 111 19.5 17.8 110
East Rim Divide 7930 11.9 9.8 121 12.1 11.4 106
Elkhart Park G.S. 9400 12.6 13.0 97 12.1 13.0 93
Gros Ventre Summit 8750 12.7 12.8 99 11.8 12.6 94
Gunsight Pass 9820 13.6 12.7 107 13.3 14.4 92
Indian Creek 9425 29.2 23.6 124 25.1 19.8 127
Kendall R.S. 7740 12.2 10.0 122 13.5 13.3 102
Larsen Creek 9000 10.9 8.3 131 14.8 14.0 106
Loomis Park 8240 17.3 14.6 118 17.3 17.0 102
New Fork Lake 8340 11.0 9.9 111 -M 10.8 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 13.8 11.8 117 16.4 14.0 117
Spring Creek Divide 9000 30.7 25.2 122 -M 24.0 *
Triple Peak 8500 26.5 22.2 119 26.9 25.6 105
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Basin Index (%) 115 106
LOWER GREEN RIVER
Blacks Fork Jct 8869 13.8 7.5 184 15.1 12.4 122
Buck Pasture 9632 21.1 -M * 22.4 -M *
EF Blacks Fork GS 9360 13.8 12.0 115 12.1 11.4 106
Hams Fork 7840 16.2 9.2 176 15.5 11.2 138
Henrys Fork 10182 -M -M * 16.1 -M *
Hewinta 9500 12.3 9.7 127 16.8 13.8 122
Hickerson Park 9122 11.4 6.7 170 13.1 10.8 121
Hole-in-Rock 9168 9.2 6.8 135 12.7 10.4 122
Indian Creek 9425 29.2 23.6 124 25.1 19.8 127
Kelley R.S. 8180 21.7 14.4 151 22.5 16.4 137
Spirit Lk 10235 22.6 13.8 164 21.8 18.3 119
Steel Creek Park 10158 21.4 15.6 137 20.7 16.9 122
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Basin Index (%) 144 124
UPPER BEAR RIVER
Bear River RS 8777 13.4 6.9 194 16.6 12.3 135
Bug Lake 7987 30.9 18.4 168 25.6 18.5 138
Burts Miller Ranch 8000 9.3 2.5 372 14.8 8.2 180
Chalk Creek #1 9171 34.3 23.7 145 32.8 23.8 138
Giveout 6930 14.9 5.0 298 16.0 12.8 125
Hayden Fork 9130 23.4 14.2 165 28.5 21.2 134
Kelley R.S. 8180 21.7 14.4 151 22.5 16.4 137
Lily Lake 9133 15.1 12.6 120 18.0 16.0 112
Monte Cristo 8932 44.8 27.3 164 41.6 26.4 158
Salt River Summit 7640 20.7 11.8 175 20.5 16.4 125
Spring Creek Divide 9000 30.7 25.2 122 -M 24.0 *
Trial Lake 9992 38.7 22.2 174 35.2 22.6 156
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Basin Index (%) 162 140
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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.
