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 9 , 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 19.9 15.6 128 21.1 20.0 106
Blind Bull Sum 8650 26.8 24.2 111 18.2 17.6 103
Cottonwood Creek 7670 26.2 21.0 125 28.6 25.2 113
East Rim Divide 7930 13.1 10.2 128 12.3 11.2 110
Grand Targhee 9260 45.6 43.8 104 -M 31.4 *
Granite Creek 6770 19.8 14.6 136 16.0 18.6 86
Grassy Lake 7265 36.0 32.8 110 39.3 34.8 113
Gros Ventre Summit 8750 12.9 12.8 101 11.7 12.1 97
Gunsight Pass 9820 14.6 13.1 111 13.5 13.8 98
Lewis Lake Divide 7850 38.3 30.7 125 -M 32.6 *
Loomis Park 8240 17.5 15.2 115 17.3 16.6 104
Phillips Bench 8200 30.6 26.2 117 -M 26.4 *
Salt River Summit 7640 21.7 12.7 171 20.5 16.2 127
Snake River Station 6920 20.6 15.6 132 23.1 22.4 103
Somsen Ranch 6800 -M 10.0 * -M 16.6 *
Spring Creek Divide 9000 -M 25.2 * -M 23.4 *
Thumb Divide 7980 21.4 16.4 130 19.6 17.6 111
Togwotee Pass 9580 23.6 23.4 101 21.7 24.5 89
Triple Peak 8500 26.6 22.9 116 27.1 25.0 108
Two Ocean Plateau 9240 32.3 29.6 109 -M 26.6 *
Willow Creek 8080 40.1 29.2 137 37.0 32.8 113
Younts Peak 8350 17.1 14.7 116 14.0 14.7 95
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Basin Index (%) 119 106
MADISON HEADWATERS IN WYOMING
Black Bear 8170 46.6 38.0 123 42.5 37.1 115
Canyon 7870 14.7 -M * 17.2 -M *
Madison Plateau 7750 31.2 22.9 136 30.2 25.0 121
West Yellowstone 6700 17.2 9.2 187 19.7 14.0 141
Whiskey Creek 6800 21.9 14.8 148 26.6 20.0 133
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Basin Index (%) 138 124
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 19.8 21.6 92 18.7 19.8 94
Canyon 7870 14.7 -M * 17.2 -M *
Evening Star 9200 27.2 25.2 108 28.9 28.2 102
Fisher Creek 9100 35.0 33.2 105 35.7 33.0 108
Monument Peak 8850 22.7 20.8 109 24.7 21.6 114
Northeast Entrance 7350 10.3 8.4 123 12.6 13.0 97
Parker Peak 9400 25.3 21.4 118 24.2 20.1 120
Sylvan Lake 8420 21.0 19.3 109 24.0 23.4 103
Thumb Divide 7980 21.4 16.4 130 19.6 17.6 111
Two Ocean Plateau 9240 32.3 29.6 109 -M 26.6 *
White Mill 8700 25.2 24.6 102 23.7 23.0 103
Wolverine 7650 13.7 9.2 149 13.1 12.7 103
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Basin Index (%) 111 106
WIND RIVER
Burroughs Creek 8750 12.1 -M * 11.3 -M *
Castle Creek 8400 6.7 6.3 106 7.5 8.8 85
Cold Springs 9630 8.9 6.8 131 10.6 9.6 110
Deer Park 9700 25.5 15.2 168 25.6 18.4 139
Hobbs Park 10100 17.5 14.4 122 16.4 13.5 121
Kirwin 9550 11.3 10.6 107 13.5 12.1 112
Little Warm 9370 11.8 10.0 118 13.4 11.8 114
South Pass 9040 20.8 14.9 140 20.4 15.8 129
St. Lawrence Alt 8620 9.0 -M * 11.2 -M *
Togwotee Pass 9580 23.6 23.4 101 21.7 24.5 89
Townsend Creek 8700 13.5 9.4 144 14.6 11.2 130
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Basin Index (%) 126 114
BIGHORN BASIN
Bald Mtn. 9380 19.2 19.6 98 15.7 16.0 98
Bear Trap Meadow 8200 9.9 5.7 174 10.0 9.0 111
Bone Springs Div 9350 15.8 17.5 90 12.6 16.0 79
Grave Springs 8550 11.0 8.2 134 11.8 9.4 126
Kirwin 9550 11.3 10.6 107 13.5 12.1 112
Marquette 8760 10.1 7.5 135 10.8 9.4 115
Middle Powder 7760 13.2 11.0 120 10.7 10.0 107
Owl Creek 8975 8.7 5.5 158 9.2 6.3 146
Powder River Pass 9480 11.2 10.6 106 13.9 13.0 107
Shell Creek 9580 14.2 15.8 90 14.3 13.8 104
Timber Creek 7950 7.1 5.2 137 8.1 7.8 104
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Basin Index (%) 112 106
SHOSHONE RIVER
Blackwater 9780 22.1 23.4 94 22.3 22.5 99
Evening Star 9200 27.2 25.2 108 28.9 28.2 102
Marquette 8760 10.1 7.5 135 10.8 9.4 115
Sylvan Lake 8420 21.0 19.3 109 24.0 23.4 103
Sylvan Road 7120 10.9 10.5 104 14.8 16.2 91
Younts Peak 8350 17.1 14.7 116 14.0 14.7 95
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Basin Index (%) 108 100
POWDER RIVER
Bear Trap Meadow 8200 9.9 5.7 174 10.0 9.0 111
Cloud Peak Reservoir 9860 15.8 14.8 107 15.3 13.6 112
Grave Springs 8550 11.0 8.2 134 11.8 9.4 126
Hansen Sawmill 8360 9.4 6.1 154 9.7 8.6 113
Middle Powder 7760 13.2 11.0 120 10.7 10.0 107
Powder River Pass 9480 11.2 10.6 106 13.9 13.0 107
Soldier Park 8720 10.0 7.4 135 9.3 9.4 99
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Basin Index (%) 126 111
TONGUE RIVER
Big Goose 7990 11.0 8.8 125 11.4 10.4 110
Bone Springs Div 9350 15.8 17.5 90 12.6 16.0 79
Burgess Junction 7880 13.0 11.2 116 14.4 12.3 117
Dome Lake 8880 12.4 11.6 107 12.5 13.2 95
Little Goose 8870 12.2 9.8 124 12.6 12.4 102
Sucker Creek 8880 14.6 12.6 116 17.2 14.0 123
Tie Creek 6870 10.4 4.6 226 13.7 10.9 126
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Basin Index (%) 117 106
BELLE FOURCHE
Blind Park 6890 9.6 6.6 145 11.8 11.2 105
Cole Canyon 5910 9.2 4.2 219 11.0 9.5 116
North Rapid Creek 6130 8.3 5.9 141 9.7 8.8 110
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Basin Index (%) 162 110
CHEYENNE RIVER BASIN
Blind Park 6890 9.6 6.6 145 11.8 11.2 105
North Rapid Creek 6130 8.3 5.9 141 9.7 8.8 110
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Basin Index (%) 143 108
UPPER N. PLATTE
Arapaho Ridge 10976 26.2 22.4 117 24.7 22.2 111
Blackhall Mtn 9839 39.9 30.4 131 38.4 29.6 130
Cinnabar Park 9707 -M 20.3 * 23.5 23.6 100
Columbine 9167 31.4 22.6 139 27.4 25.6 107
Divide Peak 8730 30.0 20.0 150 29.7 21.7 137
Joe Wright 10158 26.6 21.2 125 28.3 26.1 108
Laprele Creek 8390 13.2 9.6 138 13.9 11.8 118
Med Bow 10512 41.4 -M * -M -M *
Never Summer 10323 26.3 20.6 128 19.0 17.5 109
North French Creek 10153 32.2 30.0 107 29.9 27.0 111
Old Battle 9860 42.8 31.6 135 -M 35.1 *
Rawah 9069 15.6 10.8 144 17.2 15.9 108
Sage Creek Basin 7850 -M 11.8 * 20.8 13.3 156
Sand Lake 10098 29.7 28.3 105 28.2 25.2 112
South Brush Creek 8495 16.0 11.1 144 14.7 13.8 107
Tower 10620 53.1 44.1 120 -M 40.0 *
Webber Springs 9260 31.5 22.6 139 33.1 25.6 129
Whiskey Park 9020 41.3 26.9 154 36.2 27.6 131
Willow Creek Pass 9523 18.4 13.4 137 17.8 13.7 130
Zirkel 9338 34.8 27.9 125 35.6 30.7 116
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Basin Index (%) 129 118
SWEETWATER
Deer Park 9700 25.5 15.2 168 25.6 18.4 139
Larsen Creek 9000 12.8 9.2 139 15.0 13.5 111
South Pass 9040 20.8 14.9 140 20.4 15.8 129
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Basin Index (%) 150 128
LOWER N. PLATTE
Casper Mtn. 7920 16.0 13.6 118 14.8 13.8 107
Laprele Creek 8390 13.2 9.6 138 13.9 11.8 118
Reno Hill 8430 17.0 14.0 121 17.6 15.3 115
Windy Peak 7915 -M 7.8 * -M 10.4 *
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Basin Index (%) 124 113
LARAMIE RIVER
Brooklyn Lake 10250 26.4 22.4 118 26.2 22.0 119
Cinnabar Park 9707 -M 20.3 * 23.5 23.6 100
Crow Creek 8335 6.0 5.2 115 9.3 10.7 87
Deadman Hill 10239 20.2 16.2 125 18.7 18.0 104
Rawah 9069 15.6 10.8 144 17.2 15.9 108
Roach 9740 19.1 15.4 124 21.1 19.2 110
Windy Peak 7915 -M 7.8 * -M 10.4 *
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Basin Index (%) 125 106
S. PLATTE
Crow Creek 8335 6.0 5.2 115 9.3 10.7 87
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Basin Index (%) 115 87
LITTLE SNAKE RIVER
Battle Mountain 7498 19.0 9.3 204 23.1 15.2 152
Divide Peak 8730 30.0 20.0 150 29.7 21.7 137
Elk River 8739 29.6 16.8 176 28.0 19.4 144
Elkhead Divide 8800 34.1 -M * 31.8 -M *
Little Snake River 8928 40.7 26.5 154 -M 32.8 *
Old Battle 9860 42.8 31.6 135 -M 35.1 *
Sage Creek Basin 7850 -M 11.8 * 20.8 13.3 156
Sandstone RS 8152 -M 12.9 * 25.8 18.0 143
Whiskey Park 9020 41.3 26.9 154 36.2 27.6 131
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Basin Index (%) 155 142
UPPER GREEN RIVER
Big Sandy Opening 9080 15.4 13.2 117 15.8 13.4 118
Blind Bull Sum 8650 26.8 24.2 111 18.2 17.6 103
East Rim Divide 7930 13.1 10.2 128 12.3 11.2 110
Elkhart Park G.S. 9400 12.9 13.0 99 12.2 12.8 95
Gros Ventre Summit 8750 12.9 12.8 101 11.7 12.1 97
Gunsight Pass 9820 14.6 13.1 111 13.5 13.8 98
Indian Creek 9425 30.0 23.6 127 25.2 19.6 129
Kendall R.S. 7740 13.6 10.6 128 13.5 13.2 102
Larsen Creek 9000 12.8 9.2 139 15.0 13.5 111
Loomis Park 8240 17.5 15.2 115 17.3 16.6 104
New Fork Lake 8340 11.6 10.4 112 -M 10.6 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 16.3 12.8 127 16.6 13.9 119
Spring Creek Divide 9000 -M 25.2 * -M 23.4 *
Triple Peak 8500 26.6 22.9 116 27.1 25.0 108
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Basin Index (%) 117 109
LOWER GREEN RIVER
Blacks Fork Jct 8869 14.8 8.2 180 15.1 12.2 124
Buck Pasture 9632 22.0 -M * 21.0 -M *
EF Blacks Fork GS 9360 15.6 10.8 144 12.1 10.8 112
Hams Fork 7840 17.0 10.4 163 15.4 11.1 139
Henrys Fork 10182 -M -M * 15.9 -M *
Hewinta 9500 -M 10.2 * -M 13.4 *
Hickerson Park 9122 13.2 7.4 178 13.2 10.5 126
Hole-in-Rock 9168 12.0 7.0 171 12.7 10.2 125
Indian Creek 9425 30.0 23.6 127 25.2 19.6 129
Kelley R.S. 8180 22.5 14.5 155 22.6 16.0 141
Spirit Lk 10235 22.9 14.1 162 21.6 16.9 128
Steel Creek Park 10158 21.1 14.6 145 20.7 16.6 125
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Basin Index (%) 153 128
UPPER BEAR RIVER
Bear River RS 8777 15.6 8.2 190 16.6 12.0 138
Bug Lake 7987 31.9 18.0 177 25.4 18.2 140
Burts Miller Ranch 8000 11.8 4.5 262 14.8 8.0 185
Chalk Creek #1 9171 35.4 22.6 157 -M 22.7 *
Giveout 6930 16.6 7.3 227 16.0 12.2 131
Hayden Fork 9130 25.0 14.6 171 28.6 20.6 139
Kelley R.S. 8180 22.5 14.5 155 22.6 16.0 141
Lily Lake 9133 16.8 12.6 133 17.9 15.3 117
Monte Cristo 8932 45.8 27.2 168 -M 26.4 *
Salt River Summit 7640 21.7 12.7 171 20.5 16.2 127
Spring Creek Divide 9000 -M 25.2 * -M 23.4 *
Trial Lake 9992 37.9 22.2 171 34.8 22.4 155
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Basin Index (%) 171 140
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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.
