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 THURSDAY: APRIL 6 , 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 20.0 16.2 123 20.8 20.0 104
Blind Bull Sum 8650 26.5 23.7 112 17.3 17.6 98
Cottonwood Creek 7670 27.3 21.0 130 28.4 25.0 114
East Rim Divide 7930 13.0 10.4 125 12.2 11.0 111
Grand Targhee 9260 45.4 42.6 107 -M 30.2 *
Granite Creek 6770 19.7 15.0 131 16.0 18.0 89
Grassy Lake 7265 36.0 32.4 111 39.3 34.6 114
Gros Ventre Summit 8750 12.8 12.8 100 11.4 12.0 95
Gunsight Pass 9820 14.4 12.9 112 13.4 13.6 99
Lewis Lake Divide 7850 38.1 30.5 125 -M 32.4 *
Loomis Park 8240 17.4 15.1 115 17.3 16.6 104
Phillips Bench 8200 30.5 26.2 116 -M 26.4 *
Salt River Summit 7640 21.6 13.0 166 20.2 16.0 126
Snake River Station 6920 20.8 16.6 125 22.9 22.1 104
Somsen Ranch 6800 -M 10.7 * -M 16.4 *
Spring Creek Divide 9000 28.9 24.8 117 -M 23.4 *
Thumb Divide 7980 21.3 16.4 130 19.4 17.2 113
Togwotee Pass 9580 23.4 23.2 101 21.5 24.4 88
Triple Peak 8500 26.4 22.8 116 26.8 24.8 108
Two Ocean Plateau 9240 32.0 28.8 111 21.2 26.2 81
Willow Creek 8080 38.6 29.6 130 36.8 32.7 113
Younts Peak 8350 17.1 14.3 120 13.8 14.6 95
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Basin Index (%) 118 104
MADISON HEADWATERS IN WYOMING
Black Bear 8170 46.4 38.2 121 42.3 37.0 114
Canyon 7870 14.8 -M * 17.0 -M *
Madison Plateau 7750 31.0 22.6 137 29.0 24.4 119
West Yellowstone 6700 17.3 9.6 180 19.8 13.8 143
Whiskey Creek 6800 21.9 15.3 143 27.0 19.6 138
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Basin Index (%) 136 125
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 19.6 21.3 92 18.2 19.7 92
Canyon 7870 14.8 -M * 17.0 -M *
Evening Star 9200 27.0 24.9 108 28.5 27.7 103
Fisher Creek 9100 34.9 32.4 108 35.3 32.3 109
Monument Peak 8850 22.2 20.4 109 24.6 21.2 116
Northeast Entrance 7350 10.5 8.6 122 12.6 12.8 98
Parker Peak 9400 25.0 20.8 120 23.1 19.6 118
Sylvan Lake 8420 21.0 19.3 109 24.3 23.2 105
Thumb Divide 7980 21.3 16.4 130 19.4 17.2 113
Two Ocean Plateau 9240 32.0 28.8 111 21.2 26.2 81
White Mill 8700 24.9 23.5 106 23.4 22.4 104
Wolverine 7650 13.7 10.2 134 12.9 12.4 104
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Basin Index (%) 111 104
WIND RIVER
Burroughs Creek 8750 11.8 -M * 11.4 -M *
Castle Creek 8400 6.9 6.4 108 7.4 8.6 86
Cold Springs 9630 9.0 7.0 129 10.6 9.2 115
Deer Park 9700 25.6 15.1 170 25.5 17.7 144
Hobbs Park 10100 17.4 14.2 123 16.2 13.4 121
Kirwin 9550 11.2 10.4 108 13.4 11.9 113
Little Warm 9370 11.8 10.0 118 13.1 11.7 112
South Pass 9040 20.9 14.5 144 19.6 15.4 127
St. Lawrence Alt 8620 8.9 -M * 11.0 -M *
Togwotee Pass 9580 23.4 23.2 101 21.5 24.4 88
Townsend Creek 8700 13.5 9.2 147 14.4 11.0 131
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Basin Index (%) 127 115
BIGHORN BASIN
Bald Mtn. 9380 19.1 19.4 98 15.5 15.8 98
Bear Trap Meadow 8200 9.9 5.9 168 9.7 8.4 115
Bone Springs Div 9350 15.5 17.2 90 12.4 15.6 79
Grave Springs 8550 11.0 8.1 136 11.7 9.0 130
Kirwin 9550 11.2 10.4 108 13.4 11.9 113
Marquette 8760 10.1 7.4 136 10.6 9.2 115
Middle Powder 7760 13.1 10.7 122 10.5 9.8 107
Owl Creek 8975 8.7 5.4 161 9.0 6.0 150
Powder River Pass 9480 11.5 10.4 111 13.7 12.4 110
Shell Creek 9580 14.0 15.0 93 14.2 13.6 104
Timber Creek 7950 7.4 4.8 154 7.9 7.8 101
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Basin Index (%) 115 108
SHOSHONE RIVER
Blackwater 9780 21.9 22.9 96 21.9 21.7 101
Evening Star 9200 27.0 24.9 108 28.5 27.7 103
Marquette 8760 10.1 7.4 136 10.6 9.2 115
Sylvan Lake 8420 21.0 19.3 109 24.3 23.2 105
Sylvan Road 7120 11.3 10.6 107 14.8 16.0 92
Younts Peak 8350 17.1 14.3 120 13.8 14.6 95
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Basin Index (%) 109 101
POWDER RIVER
Bear Trap Meadow 8200 9.9 5.9 168 9.7 8.4 115
Cloud Peak Reservoir 9860 15.8 14.6 108 15.2 13.3 114
Grave Springs 8550 11.0 8.1 136 11.7 9.0 130
Hansen Sawmill 8360 9.4 6.0 157 9.6 8.2 117
Middle Powder 7760 13.1 10.7 122 10.5 9.8 107
Powder River Pass 9480 11.5 10.4 111 13.7 12.4 110
Soldier Park 8720 10.0 7.6 132 9.2 9.3 99
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Basin Index (%) 127 113
TONGUE RIVER
Big Goose 7990 10.9 8.6 127 11.5 9.8 117
Bone Springs Div 9350 15.5 17.2 90 12.4 15.6 79
Burgess Junction 7880 13.0 10.8 120 14.3 11.9 120
Dome Lake 8880 12.5 11.6 108 12.4 12.8 97
Little Goose 8870 12.1 9.6 126 12.6 12.0 105
Sucker Creek 8880 14.6 12.0 122 17.0 13.7 124
Tie Creek 6870 10.5 4.9 214 13.6 10.6 128
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Basin Index (%) 119 109
BELLE FOURCHE
Blind Park 6890 10.1 6.7 151 11.7 10.8 108
Cole Canyon 5910 9.8 4.7 209 10.9 9.2 118
North Rapid Creek 6130 8.4 6.0 140 9.8 8.8 111
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Basin Index (%) 163 112
CHEYENNE RIVER BASIN
Blind Park 6890 10.1 6.7 151 11.7 10.8 108
North Rapid Creek 6130 8.4 6.0 140 9.8 8.8 111
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Basin Index (%) 146 110
UPPER N. PLATTE
Arapaho Ridge 10976 25.8 22.0 117 24.6 21.4 115
Blackhall Mtn 9839 39.6 30.4 130 38.3 29.4 130
Cinnabar Park 9707 -M 20.6 * 23.4 23.5 100
Columbine 9167 30.5 22.0 139 27.1 24.0 113
Divide Peak 8730 29.9 19.5 153 29.6 21.4 138
Joe Wright 10158 26.2 20.2 130 28.1 25.9 108
Laprele Creek 8390 13.3 9.0 148 13.8 11.6 119
Med Bow 10512 40.9 -M * -M -M *
Never Summer 10323 26.3 20.4 129 18.8 16.9 111
North French Creek 10153 30.8 28.8 107 29.7 26.8 111
Old Battle 9860 42.6 31.3 136 -M 34.4 *
Rawah 9069 15.4 10.4 148 17.2 15.4 112
Sage Creek Basin 7850 26.8 11.6 231 20.7 12.8 162
Sand Lake 10098 29.4 27.3 108 27.8 24.8 112
South Brush Creek 8495 16.0 11.4 140 14.6 13.7 107
Tower 10620 52.9 43.2 122 -M 39.2 *
Webber Springs 9260 31.6 22.3 142 32.9 25.3 130
Whiskey Park 9020 40.7 27.0 151 36.0 27.4 131
Willow Creek Pass 9523 18.4 13.0 142 17.7 13.6 130
Zirkel 9338 34.3 28.0 122 35.2 30.6 115
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Basin Index (%) 133 119
SWEETWATER
Deer Park 9700 25.6 15.1 170 25.5 17.7 144
Larsen Creek 9000 12.5 9.8 128 14.9 13.4 111
South Pass 9040 20.9 14.5 144 19.6 15.4 127
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Basin Index (%) 150 129
LOWER N. PLATTE
Casper Mtn. 7920 16.1 13.6 118 14.8 13.7 108
Laprele Creek 8390 13.3 9.0 148 13.8 11.6 119
Reno Hill 8430 16.8 14.0 120 17.4 14.6 119
Windy Peak 7915 -M 8.0 * -M 10.2 *
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Basin Index (%) 126 115
LARAMIE RIVER
Brooklyn Lake 10250 26.2 21.8 120 26.0 21.7 120
Cinnabar Park 9707 -M 20.6 * 23.4 23.5 100
Crow Creek 8335 5.9 6.0 98 9.2 10.5 88
Deadman Hill 10239 20.0 16.0 125 18.5 17.8 104
Rawah 9069 15.4 10.4 148 17.2 15.4 112
Roach 9740 18.7 15.4 121 20.9 19.0 110
Windy Peak 7915 -M 8.0 * -M 10.2 *
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Basin Index (%) 124 107
S. PLATTE
Crow Creek 8335 5.9 6.0 98 9.2 10.5 88
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Basin Index (%) 98 88
LITTLE SNAKE RIVER
Battle Mountain 7498 18.9 10.4 182 23.0 14.6 158
Divide Peak 8730 29.9 19.5 153 29.6 21.4 138
Elk River 8739 29.4 17.0 173 27.8 19.0 146
Elkhead Divide 8800 33.6 -M * -M -M *
Little Snake River 8928 40.6 27.0 150 -M 31.8 *
Old Battle 9860 42.6 31.3 136 -M 34.4 *
Sage Creek Basin 7850 26.8 11.6 231 20.7 12.8 162
Sandstone RS 8152 -M 13.0 * 25.7 17.3 149
Whiskey Park 9020 40.7 27.0 151 36.0 27.4 131
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Basin Index (%) 159 145
UPPER GREEN RIVER
Big Sandy Opening 9080 15.5 12.9 120 15.6 12.7 123
Blind Bull Sum 8650 26.5 23.7 112 17.3 17.6 98
East Rim Divide 7930 13.0 10.4 125 12.2 11.0 111
Elkhart Park G.S. 9400 12.7 12.4 102 11.9 12.6 94
Gros Ventre Summit 8750 12.8 12.8 100 11.4 12.0 95
Gunsight Pass 9820 14.4 12.9 112 13.4 13.6 99
Indian Creek 9425 29.7 23.4 127 25.0 19.6 128
Kendall R.S. 7740 13.3 11.2 119 13.4 13.0 103
Larsen Creek 9000 12.5 9.8 128 14.9 13.4 111
Loomis Park 8240 17.4 15.1 115 17.3 16.6 104
New Fork Lake 8340 11.8 10.5 112 -M 10.6 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 16.2 12.8 127 16.6 13.8 120
Spring Creek Divide 9000 28.9 24.8 117 -M 23.4 *
Triple Peak 8500 26.4 22.8 116 26.8 24.8 108
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Basin Index (%) 117 108
LOWER GREEN RIVER
Blacks Fork Jct 8869 14.6 8.6 170 15.1 12.2 124
Buck Pasture 9632 22.0 -M * 21.0 -M *
EF Blacks Fork GS 9360 15.3 11.2 137 11.9 10.8 110
Hams Fork 7840 17.2 11.0 156 15.3 11.0 139
Henrys Fork 10182 -M -M * 17.1 -M *
Hewinta 9500 14.4 11.0 131 16.9 13.4 126
Hickerson Park 9122 13.1 6.9 190 13.2 10.4 127
Hole-in-Rock 9168 11.7 7.0 167 12.4 10.0 124
Indian Creek 9425 29.7 23.4 127 25.0 19.6 128
Kelley R.S. 8180 22.2 14.6 152 22.4 15.9 141
Spirit Lk 10235 23.0 14.1 163 21.5 16.9 127
Steel Creek Park 10158 21.0 14.6 144 20.6 16.3 126
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Basin Index (%) 149 128
UPPER BEAR RIVER
Bear River RS 8777 -M 8.8 * -M 11.8 *
Bug Lake 7987 31.8 18.3 174 25.4 18.0 141
Burts Miller Ranch 8000 11.6 5.3 219 14.7 7.8 188
Chalk Creek #1 9171 35.3 22.6 156 -M 22.4 *
Giveout 6930 16.6 8.2 202 15.9 11.8 135
Hayden Fork 9130 25.0 14.5 172 27.3 20.4 134
Kelley R.S. 8180 22.2 14.6 152 22.4 15.9 141
Lily Lake 9133 16.6 12.6 132 18.2 15.1 121
Monte Cristo 8932 45.5 27.2 167 -M 26.1 *
Salt River Summit 7640 21.6 13.0 166 20.2 16.0 126
Spring Creek Divide 9000 28.9 24.8 117 -M 23.4 *
Trial Lake 9992 37.2 21.7 171 34.6 22.3 155
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Basin Index (%) 160 140
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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.
