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 SUNDAY: APRIL 2 , 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 19.3 16.7 116 20.3 19.6 104
Blind Bull Sum 8650 25.6 23.8 108 17.2 17.5 98
Cottonwood Creek 7670 25.5 21.7 118 23.3 24.4 95
East Rim Divide 7930 12.6 10.4 121 12.0 10.9 110
Grand Targhee 9260 44.9 41.1 109 -M 29.9 *
Granite Creek 6770 19.4 15.6 124 15.8 17.8 89
Grassy Lake 7265 35.6 32.0 111 38.1 33.6 113
Gros Ventre Summit 8750 12.7 12.8 99 11.1 12.0 92
Gunsight Pass 9820 14.1 12.6 112 13.2 13.4 99
Lewis Lake Divide 7850 37.3 30.0 124 30.7 31.9 96
Loomis Park 8240 17.0 15.3 111 17.0 16.4 104
Phillips Bench 8200 30.1 25.9 116 26.1 26.1 100
Salt River Summit 7640 19.9 13.4 149 18.8 15.6 121
Snake River Station 6920 20.6 16.8 123 22.7 21.6 105
Somsen Ranch 6800 20.0 11.2 179 21.5 16.3 132
Spring Creek Divide 9000 27.4 24.5 112 20.1 23.1 87
Thumb Divide 7980 21.4 16.0 134 19.4 17.0 114
Togwotee Pass 9580 22.8 23.0 99 20.9 24.1 87
Triple Peak 8500 24.8 22.6 110 25.3 24.4 104
Two Ocean Plateau 9240 31.6 28.2 112 21.2 25.4 83
Willow Creek 8080 37.1 29.2 127 35.0 32.0 109
Younts Peak 8350 16.8 14.2 118 13.6 14.4 94
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Basin Index (%) 117 101
MADISON HEADWATERS IN WYOMING
Black Bear 8170 46.3 37.0 125 42.4 35.7 119
Canyon 7870 14.8 -M * 17.1 -M *
Madison Plateau 7750 31.0 22.2 140 29.0 23.9 121
West Yellowstone 6700 17.4 10.3 169 19.8 13.7 145
Whiskey Creek 6800 22.0 15.4 143 26.0 19.2 135
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Basin Index (%) 137 127
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 19.3 21.2 91 17.7 19.4 91
Canyon 7870 14.8 -M * 17.1 -M *
Evening Star 9200 26.6 24.4 109 28.1 27.0 104
Fisher Creek 9100 34.8 32.2 108 35.2 31.6 111
Monument Peak 8850 22.3 20.0 112 24.5 20.8 118
Northeast Entrance 7350 10.4 9.4 111 12.5 12.6 99
Parker Peak 9400 24.6 20.1 122 23.1 19.3 120
Sylvan Lake 8420 20.8 19.1 109 23.5 22.6 104
Thumb Divide 7980 21.4 16.0 134 19.4 17.0 114
Two Ocean Plateau 9240 31.6 28.2 112 21.2 25.4 83
White Mill 8700 24.8 23.2 107 23.2 22.1 105
Wolverine 7650 13.8 10.9 127 12.9 12.2 106
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Basin Index (%) 111 105
WIND RIVER
Burroughs Creek 8750 11.4 -M * 10.9 -M *
Castle Creek 8400 6.7 6.4 105 7.4 8.2 90
Cold Springs 9630 8.0 7.2 111 9.3 9.0 103
Deer Park 9700 22.9 14.4 159 23.1 17.1 135
Hobbs Park 10100 15.1 13.8 109 14.1 12.9 109
Kirwin 9550 10.7 10.4 103 12.8 11.6 110
Little Warm 9370 10.8 10.0 108 12.3 11.6 106
South Pass 9040 18.2 14.5 126 18.1 15.0 121
St. Lawrence Alt 8620 7.3 -M * 9.6 -M *
Togwotee Pass 9580 22.8 23.0 99 20.9 24.1 87
Townsend Creek 8700 11.0 8.9 124 12.0 10.8 111
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Basin Index (%) 116 108
BIGHORN BASIN
Bald Mtn. 9380 18.6 18.8 99 15.1 15.5 97
Bear Trap Meadow 8200 9.3 6.0 155 9.4 7.8 121
Bone Springs Div 9350 15.5 16.4 95 12.3 14.9 83
Grave Springs 8550 10.0 8.2 122 10.4 8.9 117
Kirwin 9550 10.7 10.4 103 12.8 11.6 110
Marquette 8760 8.7 7.2 121 9.6 8.6 112
Middle Powder 7760 11.7 10.6 110 9.8 9.6 102
Owl Creek 8975 7.7 5.6 138 8.3 5.8 143
Powder River Pass 9480 11.0 10.6 104 13.5 12.0 112
Shell Creek 9580 14.1 14.8 95 14.2 13.4 106
Timber Creek 7950 6.2 4.6 135 7.0 7.6 92
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Basin Index (%) 109 106
SHOSHONE RIVER
Blackwater 9780 21.4 22.2 96 21.4 21.3 100
Evening Star 9200 26.6 24.4 109 28.1 27.0 104
Marquette 8760 8.7 7.2 121 9.6 8.6 112
Sylvan Lake 8420 20.8 19.1 109 23.5 22.6 104
Sylvan Road 7120 10.9 10.7 102 14.7 15.6 94
Younts Peak 8350 16.8 14.2 118 13.6 14.4 94
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Basin Index (%) 108 101
POWDER RIVER
Bear Trap Meadow 8200 9.3 6.0 155 9.4 7.8 121
Cloud Peak Reservoir 9860 14.9 14.2 105 14.4 12.8 112
Grave Springs 8550 10.0 8.2 122 10.4 8.9 117
Hansen Sawmill 8360 8.6 6.5 132 8.8 8.2 107
Middle Powder 7760 11.7 10.6 110 9.8 9.6 102
Powder River Pass 9480 11.0 10.6 104 13.5 12.0 112
Soldier Park 8720 9.2 7.3 126 8.4 8.8 95
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Basin Index (%) 118 110
TONGUE RIVER
Big Goose 7990 10.4 8.4 124 10.8 9.4 115
Bone Springs Div 9350 15.5 16.4 95 12.3 14.9 83
Burgess Junction 7880 12.7 10.4 122 14.0 11.3 124
Dome Lake 8880 11.8 11.4 104 11.8 12.2 97
Little Goose 8870 11.4 9.4 121 12.0 11.4 105
Sucker Creek 8880 14.0 11.7 120 16.6 13.2 126
Tie Creek 6870 9.6 4.8 200 12.8 10.3 124
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Basin Index (%) 118 109
BELLE FOURCHE
Blind Park 6890 9.4 6.9 136 11.3 10.6 107
Cole Canyon 5910 8.6 5.4 159 10.1 9.0 112
North Rapid Creek 6130 8.0 6.5 123 8.8 8.5 104
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Basin Index (%) 138 107
CHEYENNE RIVER BASIN
Blind Park 6890 9.4 6.9 136 11.3 10.6 107
North Rapid Creek 6130 8.0 6.5 123 8.8 8.5 104
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Basin Index (%) 130 105
UPPER N. PLATTE
Arapaho Ridge 10976 25.5 21.2 120 24.3 21.2 115
Blackhall Mtn 9839 38.5 30.3 127 37.2 29.1 128
Cinnabar Park 9707 -M 20.2 * 22.7 23.1 98
Columbine 9167 30.9 22.2 139 27.0 23.4 115
Divide Peak 8730 29.0 19.6 148 28.7 21.1 136
Joe Wright 10158 25.1 19.8 127 26.7 25.2 106
Laprele Creek 8390 11.8 9.4 126 12.1 11.4 106
Med Bow 10512 39.7 -M * 31.1 -M *
Never Summer 10323 25.2 19.8 127 18.1 16.6 109
North French Creek 10153 30.4 28.2 108 29.0 26.0 112
Old Battle 9860 41.3 30.4 136 31.5 33.2 95
Rawah 9069 15.4 10.8 143 16.7 15.0 111
Sage Creek Basin 7850 26.0 13.1 198 20.6 12.7 162
Sand Lake 10098 -M 26.6 * -M 24.2 *
South Brush Creek 8495 15.8 11.8 134 14.3 13.6 105
Tower 10620 52.1 42.2 123 39.8 38.2 104
Webber Springs 9260 30.4 22.0 138 31.8 24.9 128
Whiskey Park 9020 40.3 26.4 153 35.4 26.8 132
Willow Creek Pass 9523 17.6 12.7 139 17.1 13.2 130
Zirkel 9338 33.9 27.6 123 35.0 30.3 116
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Basin Index (%) 133 116
SWEETWATER
Deer Park 9700 22.9 14.4 159 23.1 17.1 135
Larsen Creek 9000 11.9 10.2 117 14.1 13.3 106
South Pass 9040 18.2 14.5 126 18.1 15.0 121
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Basin Index (%) 136 122
LOWER N. PLATTE
Casper Mtn. 7920 13.0 13.0 100 12.7 13.4 95
Laprele Creek 8390 11.8 9.4 126 12.1 11.4 106
Reno Hill 8430 14.8 13.6 109 15.8 14.5 109
Windy Peak 7915 10.7 7.8 137 11.4 10.0 114
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Basin Index (%) 115 105
LARAMIE RIVER
Brooklyn Lake 10250 25.0 21.0 119 24.9 21.2 117
Cinnabar Park 9707 -M 20.2 * 22.7 23.1 98
Crow Creek 8335 5.4 6.0 90 8.6 10.2 84
Deadman Hill 10239 19.1 15.8 121 17.6 17.1 103
Rawah 9069 15.4 10.8 143 16.7 15.0 111
Roach 9740 18.4 15.0 123 20.5 18.2 113
Windy Peak 7915 10.7 7.8 137 11.4 10.0 114
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Basin Index (%) 123 107
S. PLATTE
Crow Creek 8335 5.4 6.0 90 8.6 10.2 84
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Basin Index (%) 90 84
LITTLE SNAKE RIVER
Battle Mountain 7498 18.8 10.8 174 22.5 14.5 155
Divide Peak 8730 29.0 19.6 148 28.7 21.1 136
Elk River 8739 29.6 17.8 166 27.2 18.6 146
Elkhead Divide 8800 33.0 -M * 27.1 -M *
Little Snake River 8928 39.8 25.7 155 37.8 31.2 121
Old Battle 9860 41.3 30.4 136 31.5 33.2 95
Sage Creek Basin 7850 26.0 13.1 198 20.6 12.7 162
Sandstone RS 8152 -M 12.8 * 25.2 17.2 147
Whiskey Park 9020 40.3 26.4 153 35.4 26.8 132
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Basin Index (%) 156 131
UPPER GREEN RIVER
Big Sandy Opening 9080 15.0 13.0 115 15.0 12.3 122
Blind Bull Sum 8650 25.6 23.8 108 17.2 17.5 98
East Rim Divide 7930 12.6 10.4 121 12.0 10.9 110
Elkhart Park G.S. 9400 12.3 12.4 99 11.4 12.5 91
Gros Ventre Summit 8750 12.7 12.8 99 11.1 12.0 92
Gunsight Pass 9820 14.1 12.6 112 13.2 13.4 99
Indian Creek 9425 27.8 23.4 119 23.4 19.4 121
Kendall R.S. 7740 13.3 11.4 117 13.2 13.0 102
Larsen Creek 9000 11.9 10.2 117 14.1 13.3 106
Loomis Park 8240 17.0 15.3 111 17.0 16.4 104
New Fork Lake 8340 11.5 10.4 111 -M 10.5 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 14.9 12.5 119 15.5 13.8 112
Spring Creek Divide 9000 27.4 24.5 112 20.1 23.1 87
Triple Peak 8500 24.8 22.6 110 25.3 24.4 104
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Basin Index (%) 112 103
LOWER GREEN RIVER
Blacks Fork Jct 8869 13.3 9.0 148 13.9 12.2 114
Buck Pasture 9632 20.3 -M * 20.4 -M *
EF Blacks Fork GS 9360 14.0 11.4 123 10.9 10.8 101
Hams Fork 7840 15.8 11.0 144 14.1 10.8 131
Henrys Fork 10182 -M -M * 14.3 -M *
Hewinta 9500 13.0 10.0 130 15.6 13.2 118
Hickerson Park 9122 10.9 7.4 147 10.8 9.9 109
Hole-in-Rock 9168 9.9 6.9 143 10.6 9.6 110
Indian Creek 9425 27.8 23.4 119 23.4 19.4 121
Kelley R.S. 8180 20.6 14.6 141 20.9 15.8 132
Spirit Lk 10235 20.3 13.0 156 19.1 16.8 114
Steel Creek Park 10158 19.4 14.2 137 19.0 15.8 120
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Basin Index (%) 136 118
UPPER BEAR RIVER
Bear River RS 8777 14.3 9.4 152 15.4 11.8 131
Bug Lake 7987 29.4 18.6 158 24.0 17.6 136
Burts Miller Ranch 8000 10.2 5.6 182 13.6 7.4 184
Chalk Creek #1 9171 32.5 22.6 144 -M 22.4 *
Giveout 6930 16.0 8.1 198 15.5 11.6 134
Hayden Fork 9130 23.8 14.8 161 27.1 19.8 137
Kelley R.S. 8180 20.6 14.6 141 20.9 15.8 132
Lily Lake 9133 15.3 12.4 123 16.8 14.7 114
Monte Cristo 8932 41.6 26.5 157 -M 25.9 *
Salt River Summit 7640 19.9 13.4 149 18.8 15.6 121
Spring Creek Divide 9000 27.4 24.5 112 20.1 23.1 87
Trial Lake 9992 35.8 21.4 167 33.8 21.8 155
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Basin Index (%) 149 129
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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.
