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 SATURDAY: APRIL 8 , 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 15.8 127 21.0 20.0 105
Blind Bull Sum 8650 27.0 24.0 112 17.9 17.6 102
Cottonwood Creek 7670 27.2 20.8 131 28.5 25.2 113
East Rim Divide 7930 13.1 10.2 128 12.3 11.1 111
Grand Targhee 9260 45.6 43.4 105 -M 31.4 *
Granite Creek 6770 19.8 14.6 136 16.0 18.6 86
Grassy Lake 7265 36.1 32.8 110 39.3 34.8 113
Gros Ventre Summit 8750 13.0 12.8 102 11.6 12.0 97
Gunsight Pass 9820 14.6 13.0 112 13.5 13.8 98
Lewis Lake Divide 7850 38.3 30.6 125 -M 32.4 *
Loomis Park 8240 17.5 15.2 115 17.3 16.6 104
Phillips Bench 8200 30.5 26.2 116 26.4 26.4 100
Salt River Summit 7640 21.9 12.6 174 20.4 16.1 127
Snake River Station 6920 20.8 16.0 130 23.1 22.4 103
Somsen Ranch 6800 -M 10.2 * -M 16.6 *
Spring Creek Divide 9000 29.1 25.0 116 -M 23.4 *
Thumb Divide 7980 21.4 16.4 130 19.5 17.6 111
Togwotee Pass 9580 23.4 23.2 101 21.7 24.5 89
Triple Peak 8500 26.6 22.8 117 27.0 24.8 109
Two Ocean Plateau 9240 32.2 29.2 110 21.3 26.6 80
Willow Creek 8080 40.4 29.3 138 37.0 32.8 113
Younts Peak 8350 17.2 14.6 118 13.9 14.7 95
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Basin Index (%) 119 103
MADISON HEADWATERS IN WYOMING
Black Bear 8170 46.5 38.0 122 42.4 37.0 115
Canyon 7870 14.8 -M * 17.1 -M *
Madison Plateau 7750 31.1 22.8 136 30.2 25.0 121
West Yellowstone 6700 17.3 9.3 186 19.8 13.8 143
Whiskey Creek 6800 21.8 14.8 147 26.8 19.9 135
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Basin Index (%) 137 125
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 19.8 21.5 92 18.6 19.8 94
Canyon 7870 14.8 -M * 17.1 -M *
Evening Star 9200 27.2 25.2 108 28.8 28.2 102
Fisher Creek 9100 35.0 32.8 107 35.6 32.9 108
Monument Peak 8850 22.4 20.6 109 24.7 21.6 114
Northeast Entrance 7350 10.4 8.4 124 12.6 13.0 97
Parker Peak 9400 25.3 21.4 118 24.1 20.0 120
Sylvan Lake 8420 20.8 19.3 108 23.9 23.3 103
Thumb Divide 7980 21.4 16.4 130 19.5 17.6 111
Two Ocean Plateau 9240 32.2 29.2 110 21.3 26.6 80
White Mill 8700 25.0 24.2 103 23.6 23.0 103
Wolverine 7650 13.8 9.5 145 13.0 12.6 103
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Basin Index (%) 111 103
WIND RIVER
Burroughs Creek 8750 11.9 -M * 11.3 -M *
Castle Creek 8400 7.0 6.2 113 7.5 8.8 85
Cold Springs 9630 9.0 7.1 127 10.6 9.4 113
Deer Park 9700 25.6 15.0 171 25.6 18.0 142
Hobbs Park 10100 17.5 14.4 122 16.5 13.5 122
Kirwin 9550 11.3 10.4 109 13.5 12.0 112
Little Warm 9370 11.9 10.0 119 13.4 11.8 114
South Pass 9040 20.9 14.6 143 20.2 15.4 131
St. Lawrence Alt 8620 9.0 -M * 11.2 -M *
Togwotee Pass 9580 23.4 23.2 101 21.7 24.5 89
Townsend Creek 8700 13.5 9.4 144 14.6 11.0 133
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Basin Index (%) 127 115
BIGHORN BASIN
Bald Mtn. 9380 19.4 19.3 101 15.7 16.0 98
Bear Trap Meadow 8200 10.0 5.8 172 10.0 8.9 112
Bone Springs Div 9350 15.8 17.5 90 12.6 15.9 79
Grave Springs 8550 11.2 8.2 137 11.8 9.2 128
Kirwin 9550 11.3 10.4 109 13.5 12.0 112
Marquette 8760 10.1 7.5 135 10.7 9.4 114
Middle Powder 7760 13.2 10.9 121 10.7 10.0 107
Owl Creek 8975 8.8 5.3 166 9.2 6.2 148
Powder River Pass 9480 11.4 10.6 108 13.9 12.8 109
Shell Creek 9580 14.3 15.4 93 14.3 13.8 104
Timber Creek 7950 7.2 5.0 144 8.1 7.8 104
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Basin Index (%) 114 107
SHOSHONE RIVER
Blackwater 9780 22.0 23.1 95 22.2 22.2 100
Evening Star 9200 27.2 25.2 108 28.8 28.2 102
Marquette 8760 10.1 7.5 135 10.7 9.4 114
Sylvan Lake 8420 20.8 19.3 108 23.9 23.3 103
Sylvan Road 7120 10.8 10.6 102 14.7 16.1 91
Younts Peak 8350 17.2 14.6 118 13.9 14.7 95
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Basin Index (%) 108 100
POWDER RIVER
Bear Trap Meadow 8200 10.0 5.8 172 10.0 8.9 112
Cloud Peak Reservoir 9860 15.9 14.8 107 15.4 13.6 113
Grave Springs 8550 11.2 8.2 137 11.8 9.2 128
Hansen Sawmill 8360 9.5 6.0 158 9.7 8.4 115
Middle Powder 7760 13.2 10.9 121 10.7 10.0 107
Powder River Pass 9480 11.4 10.6 108 13.9 12.8 109
Soldier Park 8720 10.2 7.5 136 9.3 9.4 99
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Basin Index (%) 128 112
TONGUE RIVER
Big Goose 7990 11.1 8.8 126 11.4 10.2 112
Bone Springs Div 9350 15.8 17.5 90 12.6 15.9 79
Burgess Junction 7880 13.0 11.2 116 14.5 12.2 119
Dome Lake 8880 12.6 11.6 109 12.5 13.0 96
Little Goose 8870 12.4 9.7 128 12.6 12.2 103
Sucker Creek 8880 14.8 12.4 119 17.2 14.0 123
Tie Creek 6870 10.5 4.6 228 13.7 10.8 127
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Basin Index (%) 119 107
BELLE FOURCHE
Blind Park 6890 9.8 6.6 148 11.8 11.0 107
Cole Canyon 5910 9.7 4.4 220 11.1 9.4 118
North Rapid Creek 6130 8.4 6.0 140 9.8 8.8 111
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Basin Index (%) 164 112
CHEYENNE RIVER BASIN
Blind Park 6890 9.8 6.6 148 11.8 11.0 107
North Rapid Creek 6130 8.4 6.0 140 9.8 8.8 111
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Basin Index (%) 144 109
UPPER N. PLATTE
Arapaho Ridge 10976 26.0 22.5 116 24.7 21.6 114
Blackhall Mtn 9839 39.9 30.4 131 38.4 29.4 131
Cinnabar Park 9707 -M 20.3 * 23.5 23.6 100
Columbine 9167 31.3 22.6 138 27.4 25.6 107
Divide Peak 8730 30.2 20.0 151 29.7 21.6 138
Joe Wright 10158 26.6 20.9 127 28.2 26.0 108
Laprele Creek 8390 -M 9.4 * -M 11.8 *
Med Bow 10512 41.3 -M * -M -M *
Never Summer 10323 26.3 20.6 128 18.9 17.2 110
North French Creek 10153 32.7 29.9 109 29.9 26.8 112
Old Battle 9860 42.8 31.7 135 -M 34.8 *
Rawah 9069 15.7 10.8 145 17.2 15.9 108
Sage Creek Basin 7850 -M 12.2 * 20.8 13.3 156
Sand Lake 10098 29.8 28.0 106 28.1 25.0 112
South Brush Creek 8495 16.3 11.4 143 14.7 13.8 107
Tower 10620 53.2 43.8 121 -M 39.3 *
Webber Springs 9260 31.6 22.6 140 33.1 25.4 130
Whiskey Park 9020 42.3 27.0 157 36.2 27.6 131
Willow Creek Pass 9523 18.4 13.2 139 17.8 13.6 131
Zirkel 9338 34.8 28.4 123 35.6 30.7 116
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Basin Index (%) 130 119
SWEETWATER
Deer Park 9700 25.6 15.0 171 25.6 18.0 142
Larsen Creek 9000 12.9 9.4 137 15.0 13.5 111
South Pass 9040 20.9 14.6 143 20.2 15.4 131
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Basin Index (%) 152 130
LOWER N. PLATTE
Casper Mtn. 7920 16.0 13.6 118 14.8 13.8 107
Laprele Creek 8390 -M 9.4 * -M 11.8 *
Reno Hill 8430 17.1 14.0 122 17.6 15.2 116
Windy Peak 7915 -M 7.8 * -M 10.2 *
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Basin Index (%) 120 112
LARAMIE RIVER
Brooklyn Lake 10250 26.5 22.2 119 26.2 21.8 120
Cinnabar Park 9707 -M 20.3 * 23.5 23.6 100
Crow Creek 8335 6.0 5.6 107 9.3 10.7 87
Deadman Hill 10239 20.2 16.0 126 18.6 18.0 103
Rawah 9069 15.7 10.8 145 17.2 15.9 108
Roach 9740 19.1 15.3 125 21.0 19.1 110
Windy Peak 7915 -M 7.8 * -M 10.2 *
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Basin Index (%) 125 106
S. PLATTE
Crow Creek 8335 6.0 5.6 107 9.3 10.7 87
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Basin Index (%) 107 87
LITTLE SNAKE RIVER
Battle Mountain 7498 19.2 9.8 196 23.1 15.1 153
Divide Peak 8730 30.2 20.0 151 29.7 21.6 138
Elk River 8739 30.0 17.0 176 28.0 19.2 146
Elkhead Divide 8800 34.2 -M * -M -M *
Little Snake River 8928 40.8 27.1 151 -M 32.8 *
Old Battle 9860 42.8 31.7 135 -M 34.8 *
Sage Creek Basin 7850 -M 12.2 * 20.8 13.3 156
Sandstone RS 8152 -M 12.9 * 25.8 17.8 145
Whiskey Park 9020 42.3 27.0 157 36.2 27.6 131
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Basin Index (%) 155 143
UPPER GREEN RIVER
Big Sandy Opening 9080 15.7 13.0 121 15.8 13.0 122
Blind Bull Sum 8650 27.0 24.0 112 17.9 17.6 102
East Rim Divide 7930 13.1 10.2 128 12.3 11.1 111
Elkhart Park G.S. 9400 12.9 12.6 102 12.1 12.6 96
Gros Ventre Summit 8750 13.0 12.8 102 11.6 12.0 97
Gunsight Pass 9820 14.6 13.0 112 13.5 13.8 98
Indian Creek 9425 30.1 23.6 128 25.2 19.6 129
Kendall R.S. 7740 13.6 11.0 124 13.5 13.1 103
Larsen Creek 9000 12.9 9.4 137 15.0 13.5 111
Loomis Park 8240 17.5 15.2 115 17.3 16.6 104
New Fork Lake 8340 11.9 10.6 112 -M 10.6 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 16.2 12.9 126 16.6 13.8 120
Spring Creek Divide 9000 29.1 25.0 116 -M 23.4 *
Triple Peak 8500 26.6 22.8 117 27.0 24.8 109
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Basin Index (%) 118 109
LOWER GREEN RIVER
Blacks Fork Jct 8869 14.9 8.4 177 15.1 12.2 124
Buck Pasture 9632 22.1 -M * 21.0 -M *
EF Blacks Fork GS 9360 15.6 11.2 139 12.2 10.8 113
Hams Fork 7840 17.3 10.8 160 15.3 11.0 139
Henrys Fork 10182 -M -M * -M -M *
Hewinta 9500 -M 10.7 * -M 13.4 *
Hickerson Park 9122 13.2 7.0 189 13.2 10.4 127
Hole-in-Rock 9168 12.0 7.2 167 12.7 10.2 125
Indian Creek 9425 30.1 23.6 128 25.2 19.6 129
Kelley R.S. 8180 22.6 14.6 155 22.6 16.0 141
Spirit Lk 10235 23.0 14.1 163 21.6 16.9 128
Steel Creek Park 10158 21.1 14.7 144 20.7 16.4 126
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Basin Index (%) 152 128
UPPER BEAR RIVER
Bear River RS 8777 15.8 8.2 193 16.6 11.8 141
Bug Lake 7987 31.9 18.2 175 25.4 18.2 140
Burts Miller Ranch 8000 11.9 4.6 259 14.8 7.8 190
Chalk Creek #1 9171 35.5 22.5 158 -M 22.6 *
Giveout 6930 16.7 7.7 217 16.0 12.0 133
Hayden Fork 9130 25.4 14.8 172 28.5 20.6 138
Kelley R.S. 8180 22.6 14.6 155 22.6 16.0 141
Lily Lake 9133 16.7 12.4 135 18.0 15.2 118
Monte Cristo 8932 45.9 27.4 168 -M 26.4 *
Salt River Summit 7640 21.9 12.6 174 20.4 16.1 127
Spring Creek Divide 9000 29.1 25.0 116 -M 23.4 *
Trial Lake 9992 37.6 22.0 171 34.8 22.4 155
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Basin Index (%) 164 141
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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.
