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 WEDNESDAY: APRIL 5 , 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 16.4 121 20.8 19.9 105
Blind Bull Sum 8650 26.4 23.7 111 17.3 17.5 99
Cottonwood Creek 7670 27.0 21.2 127 28.3 25.0 113
East Rim Divide 7930 12.8 10.5 122 12.2 11.0 111
Grand Targhee 9260 45.3 42.0 108 -M 30.1 *
Granite Creek 6770 19.5 15.2 128 15.9 17.9 89
Grassy Lake 7265 35.9 32.2 111 39.1 34.4 114
Gros Ventre Summit 8750 12.8 12.8 100 11.3 12.0 94
Gunsight Pass 9820 14.3 12.7 113 13.3 13.5 99
Lewis Lake Divide 7850 37.8 30.3 125 -M 32.2 *
Loomis Park 8240 17.3 15.3 113 17.2 16.6 104
Phillips Bench 8200 30.4 26.2 116 -M 26.4 *
Salt River Summit 7640 21.3 13.2 161 20.0 15.9 126
Snake River Station 6920 20.7 16.6 125 23.0 22.0 105
Somsen Ranch 6800 20.9 11.1 188 21.9 16.4 134
Spring Creek Divide 9000 28.7 24.8 116 -M 23.3 *
Thumb Divide 7980 21.3 16.2 131 19.3 17.2 112
Togwotee Pass 9580 23.3 23.2 100 21.4 24.4 88
Triple Peak 8500 26.2 22.9 114 26.6 24.7 108
Two Ocean Plateau 9240 31.8 28.6 111 21.1 25.9 81
Willow Creek 8080 38.4 29.8 129 36.5 32.6 112
Younts Peak 8350 16.9 14.3 118 13.5 14.6 92
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Basin Index (%) 120 105
MADISON HEADWATERS IN WYOMING
Black Bear 8170 46.4 38.1 122 42.3 36.8 115
Canyon 7870 14.8 -M * 17.0 -M *
Madison Plateau 7750 31.0 22.4 138 29.0 24.4 119
West Yellowstone 6700 17.3 10.0 173 19.8 13.8 143
Whiskey Creek 6800 21.9 15.4 142 26.8 19.3 139
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Basin Index (%) 136 125
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 19.4 21.3 91 18.0 19.7 91
Canyon 7870 14.8 -M * 17.0 -M *
Evening Star 9200 26.9 24.7 109 28.4 27.4 104
Fisher Creek 9100 34.8 32.4 107 35.2 32.0 110
Monument Peak 8850 22.2 20.2 110 24.5 21.0 117
Northeast Entrance 7350 10.4 8.9 117 12.5 12.8 98
Parker Peak 9400 24.9 20.6 121 23.1 19.6 118
Sylvan Lake 8420 21.0 19.4 108 24.3 22.9 106
Thumb Divide 7980 21.3 16.2 131 19.3 17.2 112
Two Ocean Plateau 9240 31.8 28.6 111 21.1 25.9 81
White Mill 8700 24.9 23.4 106 23.3 22.2 105
Wolverine 7650 13.6 10.2 133 12.8 12.4 103
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Basin Index (%) 111 104
WIND RIVER
Burroughs Creek 8750 11.8 -M * 11.3 -M *
Castle Creek 8400 6.8 6.4 106 7.4 8.3 89
Cold Springs 9630 8.9 7.0 127 10.6 9.0 118
Deer Park 9700 25.6 14.8 173 25.5 17.6 145
Hobbs Park 10100 17.3 14.2 122 16.0 13.3 120
Kirwin 9550 11.2 10.4 108 13.3 11.8 113
Little Warm 9370 11.8 10.0 118 13.1 11.7 112
South Pass 9040 20.9 14.6 143 19.0 15.4 123
St. Lawrence Alt 8620 8.9 -M * 11.0 -M *
Togwotee Pass 9580 23.3 23.2 100 21.4 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 18.8 19.2 98 15.2 15.7 97
Bear Trap Meadow 8200 9.9 5.8 171 9.7 8.2 118
Bone Springs Div 9350 15.0 17.0 88 12.1 15.2 80
Grave Springs 8550 11.0 8.2 134 11.6 9.0 129
Kirwin 9550 11.2 10.4 108 13.3 11.8 113
Marquette 8760 10.1 7.4 136 10.6 9.2 115
Middle Powder 7760 13.0 10.7 121 10.5 9.6 109
Owl Creek 8975 8.7 5.6 155 8.9 6.0 148
Powder River Pass 9480 11.4 10.3 111 13.6 12.3 111
Shell Creek 9580 13.9 15.0 93 14.1 13.6 104
Timber Creek 7950 7.3 4.8 152 7.8 7.8 100
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Basin Index (%) 114 108
SHOSHONE RIVER
Blackwater 9780 21.8 22.6 96 21.8 21.6 101
Evening Star 9200 26.9 24.7 109 28.4 27.4 104
Marquette 8760 10.1 7.4 136 10.6 9.2 115
Sylvan Lake 8420 21.0 19.4 108 24.3 22.9 106
Sylvan Road 7120 11.2 10.6 106 14.8 16.0 92
Younts Peak 8350 16.9 14.3 118 13.5 14.6 92
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Basin Index (%) 109 102
POWDER RIVER
Bear Trap Meadow 8200 9.9 5.8 171 9.7 8.2 118
Cloud Peak Reservoir 9860 15.8 14.4 110 15.2 13.2 115
Grave Springs 8550 11.0 8.2 134 11.6 9.0 129
Hansen Sawmill 8360 9.3 6.1 152 9.5 8.2 116
Middle Powder 7760 13.0 10.7 121 10.5 9.6 109
Powder River Pass 9480 11.4 10.3 111 13.6 12.3 111
Soldier Park 8720 9.8 7.6 129 9.1 9.2 99
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Basin Index (%) 127 114
TONGUE RIVER
Big Goose 7990 10.9 8.6 127 11.5 9.8 117
Bone Springs Div 9350 15.0 17.0 88 12.1 15.2 80
Burgess Junction 7880 13.0 10.7 121 14.3 11.6 123
Dome Lake 8880 12.3 11.7 105 12.2 12.6 97
Little Goose 8870 12.1 9.5 127 12.5 11.8 106
Sucker Creek 8880 14.6 11.8 124 16.9 13.7 123
Tie Creek 6870 10.4 4.8 217 13.6 10.6 128
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Basin Index (%) 119 109
BELLE FOURCHE
Blind Park 6890 10.2 7.0 146 11.7 10.6 110
Cole Canyon 5910 9.7 5.2 187 10.8 9.1 119
North Rapid Creek 6130 8.4 6.2 135 9.7 8.6 113
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Basin Index (%) 154 114
CHEYENNE RIVER BASIN
Blind Park 6890 10.2 7.0 146 11.7 10.6 110
North Rapid Creek 6130 8.4 6.2 135 9.7 8.6 113
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Basin Index (%) 141 111
UPPER N. PLATTE
Arapaho Ridge 10976 25.8 22.0 117 24.6 21.3 115
Blackhall Mtn 9839 39.5 30.4 130 38.3 29.2 131
Cinnabar Park 9707 -M 20.5 * 23.4 23.5 100
Columbine 9167 30.6 21.8 140 27.0 23.8 113
Divide Peak 8730 29.7 19.6 152 29.5 21.3 138
Joe Wright 10158 26.0 20.2 129 27.9 25.7 109
Laprele Creek 8390 13.3 9.4 141 13.7 11.6 118
Med Bow 10512 40.7 -M * -M -M *
Never Summer 10323 26.2 20.2 130 18.8 16.7 113
North French Creek 10153 30.6 28.4 108 29.7 26.4 112
Old Battle 9860 42.4 31.1 136 -M 34.3 *
Rawah 9069 15.4 10.5 147 17.1 15.4 111
Sage Creek Basin 7850 26.5 12.2 217 20.7 12.8 162
Sand Lake 10098 -M 27.0 * -M 24.8 *
South Brush Creek 8495 16.0 11.6 138 14.6 13.6 107
Tower 10620 52.6 42.9 123 -M 39.2 *
Webber Springs 9260 31.5 22.2 142 32.8 25.3 130
Whiskey Park 9020 40.5 27.0 150 35.9 27.2 132
Willow Creek Pass 9523 18.3 13.0 141 17.8 13.6 131
Zirkel 9338 34.1 27.6 124 35.2 30.4 116
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Basin Index (%) 135 120
SWEETWATER
Deer Park 9700 25.6 14.8 173 25.5 17.6 145
Larsen Creek 9000 12.5 10.0 125 14.9 13.4 111
South Pass 9040 20.9 14.6 143 19.0 15.4 123
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Basin Index (%) 150 128
LOWER N. PLATTE
Casper Mtn. 7920 16.1 13.5 119 14.7 13.7 107
Laprele Creek 8390 13.3 9.4 141 13.7 11.6 118
Reno Hill 8430 16.8 14.0 120 17.4 14.5 120
Windy Peak 7915 12.2 8.0 152 12.7 10.2 125
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Basin Index (%) 130 117
LARAMIE RIVER
Brooklyn Lake 10250 26.2 21.6 121 26.0 21.4 121
Cinnabar Park 9707 -M 20.5 * 23.4 23.5 100
Crow Creek 8335 5.9 6.2 95 9.1 10.5 87
Deadman Hill 10239 20.0 16.0 125 18.5 17.7 105
Rawah 9069 15.4 10.5 147 17.1 15.4 111
Roach 9740 18.6 15.4 121 20.8 19.0 109
Windy Peak 7915 12.2 8.0 152 12.7 10.2 125
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Basin Index (%) 127 108
S. PLATTE
Crow Creek 8335 5.9 6.2 95 9.1 10.5 87
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Basin Index (%) 95 87
LITTLE SNAKE RIVER
Battle Mountain 7498 18.7 10.2 183 22.9 14.6 157
Divide Peak 8730 29.7 19.6 152 29.5 21.3 138
Elk River 8739 29.2 17.5 167 27.8 19.0 146
Elkhead Divide 8800 33.3 -M * -M -M *
Little Snake River 8928 40.4 26.6 152 -M 31.6 *
Old Battle 9860 42.4 31.1 136 -M 34.3 *
Sage Creek Basin 7850 26.5 12.2 217 20.7 12.8 162
Sandstone RS 8152 -M 12.8 * 25.6 17.3 148
Whiskey Park 9020 40.5 27.0 150 35.9 27.2 132
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Basin Index (%) 158 145
UPPER GREEN RIVER
Big Sandy Opening 9080 15.5 13.0 119 15.6 12.7 123
Blind Bull Sum 8650 26.4 23.7 111 17.3 17.5 99
East Rim Divide 7930 12.8 10.5 122 12.2 11.0 111
Elkhart Park G.S. 9400 12.6 12.4 102 11.6 12.6 92
Gros Ventre Summit 8750 12.8 12.8 100 11.3 12.0 94
Gunsight Pass 9820 14.3 12.7 113 13.3 13.5 99
Indian Creek 9425 29.5 23.5 126 24.9 19.6 127
Kendall R.S. 7740 13.3 11.4 117 13.4 13.0 103
Larsen Creek 9000 12.5 10.0 125 14.9 13.4 111
Loomis Park 8240 17.3 15.3 113 17.2 16.6 104
New Fork Lake 8340 11.7 10.5 111 -M 10.6 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 16.0 12.8 125 16.4 13.8 119
Spring Creek Divide 9000 28.7 24.8 116 -M 23.3 *
Triple Peak 8500 26.2 22.9 114 26.6 24.7 108
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Basin Index (%) 115 108
LOWER GREEN RIVER
Blacks Fork Jct 8869 14.6 8.8 166 15.0 12.2 123
Buck Pasture 9632 21.9 -M * 20.8 -M *
EF Blacks Fork GS 9360 15.3 11.2 137 11.9 10.8 110
Hams Fork 7840 17.2 11.0 156 15.2 11.0 138
Henrys Fork 10182 -M -M * 16.0 -M *
Hewinta 9500 14.3 10.4 138 16.9 13.4 126
Hickerson Park 9122 12.9 7.3 177 12.9 10.4 124
Hole-in-Rock 9168 11.6 7.0 166 12.5 9.8 128
Indian Creek 9425 29.5 23.5 126 24.9 19.6 127
Kelley R.S. 8180 21.9 14.8 148 22.3 15.9 140
Spirit Lk 10235 22.6 13.8 164 21.2 16.9 125
Steel Creek Park 10158 20.9 14.6 143 20.5 16.2 127
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Basin Index (%) 148 127
UPPER BEAR RIVER
Bear River RS 8777 15.6 8.9 175 16.4 11.8 139
Bug Lake 7987 31.7 18.4 172 25.7 18.0 143
Burts Miller Ranch 8000 11.6 5.1 227 14.7 7.7 191
Chalk Creek #1 9171 35.0 22.8 154 -M 22.4 *
Giveout 6930 16.7 7.6 220 16.0 11.7 137
Hayden Fork 9130 24.8 14.7 169 27.3 20.2 135
Kelley R.S. 8180 21.9 14.8 148 22.3 15.9 140
Lily Lake 9133 16.5 12.4 133 17.6 14.8 119
Monte Cristo 8932 45.2 27.1 167 -M 26.1 *
Salt River Summit 7640 21.3 13.2 161 20.0 15.9 126
Spring Creek Divide 9000 28.7 24.8 116 -M 23.3 *
Trial Lake 9992 37.1 21.5 173 34.3 22.3 154
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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.
