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 TUESDAY: APRIL 4 , 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 19.8 16.6 119 20.8 19.8 105
Blind Bull Sum 8650 26.4 23.6 112 17.3 17.5 99
Cottonwood Creek 7670 26.2 21.4 122 27.4 24.8 110
East Rim Divide 7930 12.8 10.4 123 12.1 11.0 110
Grand Targhee 9260 45.3 42.0 108 -M 30.0 *
Granite Creek 6770 19.6 15.3 128 16.0 17.8 90
Grassy Lake 7265 35.9 32.2 111 39.1 34.0 115
Gros Ventre Summit 8750 12.8 12.8 100 11.2 12.0 93
Gunsight Pass 9820 14.2 12.8 111 13.2 13.4 99
Lewis Lake Divide 7850 38.0 30.2 126 -M 32.2 *
Loomis Park 8240 17.2 15.4 112 17.1 16.6 103
Phillips Bench 8200 30.4 26.0 117 -M 26.2 *
Salt River Summit 7640 20.6 13.4 154 19.2 15.8 122
Snake River Station 6920 20.8 16.7 125 23.0 22.0 105
Somsen Ranch 6800 20.5 10.8 190 21.6 16.4 132
Spring Creek Divide 9000 28.2 24.6 115 -M 23.2 *
Thumb Divide 7980 21.4 16.2 132 19.4 17.2 113
Togwotee Pass 9580 23.3 23.2 100 21.3 24.2 88
Triple Peak 8500 25.8 22.8 113 26.1 24.6 106
Two Ocean Plateau 9240 31.9 28.4 112 21.2 25.4 83
Willow Creek 8080 38.2 29.6 129 35.9 32.3 111
Younts Peak 8350 17.1 14.2 120 13.7 14.6 94
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Basin Index (%) 119 105
MADISON HEADWATERS IN WYOMING
Black Bear 8170 46.4 37.8 123 42.4 36.6 116
Canyon 7870 14.9 -M * 17.0 -M *
Madison Plateau 7750 31.1 22.4 139 29.0 24.3 119
West Yellowstone 6700 17.4 10.0 174 19.8 13.8 143
Whiskey Creek 6800 22.0 15.4 143 27.0 19.2 141
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Basin Index (%) 137 126
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 19.4 21.2 92 18.0 19.6 92
Canyon 7870 14.9 -M * 17.0 -M *
Evening Star 9200 26.8 24.7 109 28.2 27.2 104
Fisher Creek 9100 34.9 32.2 108 35.2 31.8 111
Monument Peak 8850 22.3 20.2 110 24.5 20.9 117
Northeast Entrance 7350 10.4 9.0 116 12.5 12.7 98
Parker Peak 9400 24.7 20.3 122 23.1 19.5 118
Sylvan Lake 8420 21.0 19.4 108 24.2 22.6 107
Thumb Divide 7980 21.4 16.2 132 19.4 17.2 113
Two Ocean Plateau 9240 31.9 28.4 112 21.2 25.4 83
White Mill 8700 24.9 23.2 107 23.4 22.2 105
Wolverine 7650 13.7 10.6 129 12.9 12.4 104
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Basin Index (%) 112 105
WIND RIVER
Burroughs Creek 8750 11.7 -M * 11.2 -M *
Castle Creek 8400 6.8 6.3 108 7.4 8.2 90
Cold Springs 9630 8.4 7.0 120 9.7 9.0 108
Deer Park 9700 24.2 14.7 165 24.0 17.5 137
Hobbs Park 10100 16.1 14.2 113 15.0 13.2 114
Kirwin 9550 10.9 10.5 104 13.1 11.7 112
Little Warm 9370 11.1 10.0 111 12.6 11.6 109
South Pass 9040 19.5 14.6 134 18.2 15.4 118
St. Lawrence Alt 8620 8.0 -M * 10.2 -M *
Togwotee Pass 9580 23.3 23.2 100 21.3 24.2 88
Townsend Creek 8700 12.2 9.2 133 13.2 10.8 122
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Basin Index (%) 121 111
BIGHORN BASIN
Bald Mtn. 9380 18.7 19.2 97 15.2 15.7 97
Bear Trap Meadow 8200 9.5 5.8 164 9.5 8.2 116
Bone Springs Div 9350 15.2 16.8 90 12.1 15.1 80
Grave Springs 8550 10.5 8.2 128 11.0 9.0 122
Kirwin 9550 10.9 10.5 104 13.1 11.7 112
Marquette 8760 9.1 7.2 126 9.8 9.0 109
Middle Powder 7760 12.2 10.8 113 9.9 9.6 103
Owl Creek 8975 8.4 5.6 150 8.8 6.0 147
Powder River Pass 9480 11.2 10.4 108 13.5 12.3 110
Shell Creek 9580 14.0 15.0 93 14.1 13.6 104
Timber Creek 7950 6.9 4.8 144 7.6 7.8 97
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Basin Index (%) 111 106
SHOSHONE RIVER
Blackwater 9780 21.8 22.4 97 21.7 21.5 101
Evening Star 9200 26.8 24.7 109 28.2 27.2 104
Marquette 8760 9.1 7.2 126 9.8 9.0 109
Sylvan Lake 8420 21.0 19.4 108 24.2 22.6 107
Sylvan Road 7120 11.1 10.6 105 14.8 16.0 92
Younts Peak 8350 17.1 14.2 120 13.7 14.6 94
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Basin Index (%) 109 101
POWDER RIVER
Bear Trap Meadow 8200 9.5 5.8 164 9.5 8.2 116
Cloud Peak Reservoir 9860 15.3 14.4 106 14.8 13.2 112
Grave Springs 8550 10.5 8.2 128 11.0 9.0 122
Hansen Sawmill 8360 8.9 6.2 144 9.1 8.2 111
Middle Powder 7760 12.2 10.8 113 9.9 9.6 103
Powder River Pass 9480 11.2 10.4 108 13.5 12.3 110
Soldier Park 8720 9.5 7.7 123 8.7 9.1 96
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Basin Index (%) 121 110
TONGUE RIVER
Big Goose 7990 10.5 8.6 122 11.0 9.8 112
Bone Springs Div 9350 15.2 16.8 90 12.1 15.1 80
Burgess Junction 7880 12.8 10.6 121 14.1 11.5 123
Dome Lake 8880 12.1 11.6 104 12.0 12.6 95
Little Goose 8870 11.6 9.5 122 12.2 11.8 103
Sucker Creek 8880 14.2 11.8 120 16.6 13.6 122
Tie Creek 6870 9.8 4.8 204 13.0 10.4 125
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Basin Index (%) 117 107
BELLE FOURCHE
Blind Park 6890 9.9 7.1 139 11.5 10.6 108
Cole Canyon 5910 9.1 5.4 169 10.4 9.0 116
North Rapid Creek 6130 8.2 6.4 128 9.4 8.6 109
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Basin Index (%) 144 111
CHEYENNE RIVER BASIN
Blind Park 6890 9.9 7.1 139 11.5 10.6 108
North Rapid Creek 6130 8.2 6.4 128 9.4 8.6 109
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Basin Index (%) 134 109
UPPER N. PLATTE
Arapaho Ridge 10976 25.5 21.8 117 24.3 21.3 114
Blackhall Mtn 9839 39.0 30.4 128 37.2 29.1 128
Cinnabar Park 9707 -M 20.6 * 23.1 23.4 99
Columbine 9167 32.0 21.8 147 27.0 23.6 114
Divide Peak 8730 29.6 19.6 151 29.0 21.2 137
Joe Wright 10158 25.2 20.1 125 26.8 25.6 105
Laprele Creek 8390 12.9 9.6 134 13.3 11.6 115
Med Bow 10512 40.5 -M * -M -M *
Never Summer 10323 25.3 20.4 124 18.2 16.6 110
North French Creek 10153 30.9 28.3 109 29.5 26.2 113
Old Battle 9860 41.9 31.0 135 -M 34.2 *
Rawah 9069 15.0 10.6 142 16.7 15.3 109
Sage Creek Basin 7850 26.4 12.6 210 20.6 12.8 161
Sand Lake 10098 -M 27.0 * -M 24.6 *
South Brush Creek 8495 16.0 11.8 136 14.5 13.6 107
Tower 10620 52.2 42.8 122 -M 38.8 *
Webber Springs 9260 30.8 22.2 139 32.4 25.2 129
Whiskey Park 9020 41.5 27.1 153 35.7 27.2 131
Willow Creek Pass 9523 17.6 13.0 135 17.1 13.4 128
Zirkel 9338 34.3 27.6 124 35.0 30.4 115
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Basin Index (%) 134 119
SWEETWATER
Deer Park 9700 24.2 14.7 165 24.0 17.5 137
Larsen Creek 9000 11.9 10.1 118 14.2 13.4 106
South Pass 9040 19.5 14.6 134 18.2 15.4 118
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Basin Index (%) 141 122
LOWER N. PLATTE
Casper Mtn. 7920 15.2 13.0 117 14.2 13.6 104
Laprele Creek 8390 12.9 9.6 134 13.3 11.6 115
Reno Hill 8430 16.5 14.0 118 17.1 14.5 118
Windy Peak 7915 12.0 8.0 150 12.4 10.2 122
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Basin Index (%) 127 114
LARAMIE RIVER
Brooklyn Lake 10250 25.9 21.4 121 25.8 21.3 121
Cinnabar Park 9707 -M 20.6 * 23.1 23.4 99
Crow Creek 8335 5.7 6.2 92 8.9 10.5 85
Deadman Hill 10239 19.4 15.8 123 17.8 17.6 101
Rawah 9069 15.0 10.6 142 16.7 15.3 109
Roach 9740 18.4 15.4 119 20.6 18.6 111
Windy Peak 7915 12.0 8.0 150 12.4 10.2 122
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Basin Index (%) 125 107
S. PLATTE
Crow Creek 8335 5.7 6.2 92 8.9 10.5 85
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Basin Index (%) 92 85
LITTLE SNAKE RIVER
Battle Mountain 7498 18.9 10.5 180 22.9 14.6 157
Divide Peak 8730 29.6 19.6 151 29.0 21.2 137
Elk River 8739 29.7 18.2 163 27.4 18.9 145
Elkhead Divide 8800 33.4 -M * -M -M *
Little Snake River 8928 40.3 26.5 152 -M 31.5 *
Old Battle 9860 41.9 31.0 135 -M 34.2 *
Sage Creek Basin 7850 26.4 12.6 210 20.6 12.8 161
Sandstone RS 8152 -M 12.8 * -M 17.2 *
Whiskey Park 9020 41.5 27.1 153 35.7 27.2 131
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Basin Index (%) 157 143
UPPER GREEN RIVER
Big Sandy Opening 9080 15.2 12.9 118 15.2 12.7 120
Blind Bull Sum 8650 26.4 23.6 112 17.3 17.5 99
East Rim Divide 7930 12.8 10.4 123 12.1 11.0 110
Elkhart Park G.S. 9400 12.4 12.4 100 11.5 12.6 91
Gros Ventre Summit 8750 12.8 12.8 100 11.2 12.0 93
Gunsight Pass 9820 14.2 12.8 111 13.2 13.4 99
Indian Creek 9425 29.0 23.4 124 24.2 19.4 125
Kendall R.S. 7740 13.4 11.2 120 13.3 13.0 102
Larsen Creek 9000 11.9 10.1 118 14.2 13.4 106
Loomis Park 8240 17.2 15.4 112 17.1 16.6 103
New Fork Lake 8340 11.6 10.5 110 -M 10.6 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 15.7 12.6 125 16.1 13.8 117
Spring Creek Divide 9000 28.2 24.6 115 -M 23.2 *
Triple Peak 8500 25.8 22.8 113 26.1 24.6 106
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Basin Index (%) 114 106
LOWER GREEN RIVER
Blacks Fork Jct 8869 14.1 9.0 157 14.5 12.2 119
Buck Pasture 9632 21.1 -M * 20.5 -M *
EF Blacks Fork GS 9360 14.8 11.4 130 11.4 10.8 106
Hams Fork 7840 16.8 11.1 151 14.9 11.0 135
Henrys Fork 10182 -M -M * 15.5 -M *
Hewinta 9500 13.7 10.8 127 16.3 13.4 122
Hickerson Park 9122 12.0 7.4 162 12.1 10.2 119
Hole-in-Rock 9168 10.8 6.9 157 11.8 9.8 120
Indian Creek 9425 29.0 23.4 124 24.2 19.4 125
Kelley R.S. 8180 21.3 14.9 143 21.7 15.9 136
Spirit Lk 10235 21.8 13.2 165 20.5 16.8 122
Steel Creek Park 10158 20.2 14.2 142 19.8 16.2 122
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Basin Index (%) 143 123
UPPER BEAR RIVER
Bear River RS 8777 15.0 9.2 163 15.9 11.8 135
Bug Lake 7987 31.4 18.6 169 25.5 17.8 143
Burts Miller Ranch 8000 10.8 5.7 189 14.1 7.7 183
Chalk Creek #1 9171 33.8 22.8 148 -M 22.4 *
Giveout 6930 16.7 8.0 209 16.0 11.6 138
Hayden Fork 9130 24.6 15.0 164 27.3 20.2 135
Kelley R.S. 8180 21.3 14.9 143 21.7 15.9 136
Lily Lake 9133 15.9 12.4 128 17.4 14.7 118
Monte Cristo 8932 44.3 27.2 163 40.3 26.0 155
Salt River Summit 7640 20.6 13.4 154 19.2 15.8 122
Spring Creek Divide 9000 28.2 24.6 115 -M 23.2 *
Trial Lake 9992 36.8 21.4 172 34.1 22.2 154
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Basin Index (%) 155 141
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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.
