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 MONDAY: APRIL 3 , 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 19.7 16.6 119 20.8 19.8 105
Blind Bull Sum 8650 26.1 23.5 111 17.2 17.5 98
Cottonwood Creek 7670 25.8 21.5 120 -M 24.6 *
East Rim Divide 7930 12.7 10.5 121 12.0 10.9 110
Grand Targhee 9260 45.2 41.3 109 -M 30.0 *
Granite Creek 6770 19.5 15.4 127 15.9 17.8 89
Grassy Lake 7265 35.9 32.2 111 38.9 33.9 115
Gros Ventre Summit 8750 12.8 12.8 100 11.2 12.0 93
Gunsight Pass 9820 14.1 12.7 111 13.2 13.4 99
Lewis Lake Divide 7850 38.0 30.0 127 -M 32.0 *
Loomis Park 8240 17.1 15.4 111 17.1 16.5 104
Phillips Bench 8200 30.4 26.0 117 -M 26.2 *
Salt River Summit 7640 20.3 13.4 151 19.0 15.8 120
Snake River Station 6920 20.9 16.8 124 22.9 21.8 105
Somsen Ranch 6800 20.2 11.0 184 21.5 16.4 131
Spring Creek Divide 9000 27.8 24.6 113 -M 23.2 *
Thumb Divide 7980 21.5 16.0 134 19.3 17.1 113
Togwotee Pass 9580 23.1 23.0 100 21.2 24.1 88
Triple Peak 8500 25.3 22.6 112 25.7 24.6 104
Two Ocean Plateau 9240 31.8 28.4 112 21.2 25.4 83
Willow Creek 8080 37.8 29.6 128 35.7 32.2 111
Younts Peak 8350 17.0 14.2 120 13.7 14.4 95
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Basin Index (%) 119 104
MADISON HEADWATERS IN WYOMING
Black Bear 8170 46.3 37.4 124 42.3 36.2 117
Canyon 7870 14.8 -M * 17.0 -M *
Madison Plateau 7750 31.1 22.2 140 29.0 24.1 120
West Yellowstone 6700 17.5 10.2 172 19.8 13.8 143
Whiskey Creek 6800 22.0 15.4 143 26.7 19.2 139
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Basin Index (%) 137 126
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 19.2 21.2 91 17.9 19.4 92
Canyon 7870 14.8 -M * 17.0 -M *
Evening Star 9200 26.8 24.5 109 28.2 27.2 104
Fisher Creek 9100 34.9 32.3 108 35.2 31.6 111
Monument Peak 8850 22.3 20.2 110 24.5 20.8 118
Northeast Entrance 7350 10.4 9.1 114 12.5 12.6 99
Parker Peak 9400 24.6 20.2 122 23.1 19.4 119
Sylvan Lake 8420 21.0 19.4 108 23.9 22.6 106
Thumb Divide 7980 21.5 16.0 134 19.3 17.1 113
Two Ocean Plateau 9240 31.8 28.4 112 21.2 25.4 83
White Mill 8700 24.9 23.2 107 23.4 22.1 106
Wolverine 7650 13.7 10.8 127 12.8 12.2 105
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Basin Index (%) 111 105
WIND RIVER
Burroughs Creek 8750 11.5 -M * 11.1 -M *
Castle Creek 8400 6.7 6.3 106 7.3 8.2 89
Cold Springs 9630 8.0 7.2 111 9.4 9.0 104
Deer Park 9700 23.2 14.5 160 23.3 17.2 135
Hobbs Park 10100 15.3 13.9 110 14.2 12.9 110
Kirwin 9550 10.7 10.5 102 12.8 11.7 109
Little Warm 9370 10.9 10.0 109 12.4 11.6 107
South Pass 9040 18.5 14.6 127 18.1 15.0 121
St. Lawrence Alt 8620 7.2 -M * 9.6 -M *
Togwotee Pass 9580 23.1 23.0 100 21.2 24.1 88
Townsend Creek 8700 11.1 9.0 123 12.1 10.8 112
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Basin Index (%) 117 109
BIGHORN BASIN
Bald Mtn. 9380 18.5 19.1 97 15.1 15.6 97
Bear Trap Meadow 8200 9.2 5.9 156 9.3 8.1 115
Bone Springs Div 9350 15.3 16.6 92 12.1 15.0 81
Grave Springs 8550 9.9 8.2 121 10.3 8.9 116
Kirwin 9550 10.7 10.5 102 12.8 11.7 109
Marquette 8760 8.7 7.2 121 9.5 8.8 108
Middle Powder 7760 11.7 10.8 108 9.7 9.6 101
Owl Creek 8975 7.7 5.6 138 8.2 5.8 141
Powder River Pass 9480 11.0 10.4 106 13.5 12.3 110
Shell Creek 9580 14.0 14.9 94 14.1 13.4 105
Timber Creek 7950 6.3 4.8 131 7.0 7.7 91
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Basin Index (%) 108 104
SHOSHONE RIVER
Blackwater 9780 21.6 22.3 97 21.5 21.4 100
Evening Star 9200 26.8 24.5 109 28.2 27.2 104
Marquette 8760 8.7 7.2 121 9.5 8.8 108
Sylvan Lake 8420 21.0 19.4 108 23.9 22.6 106
Sylvan Road 7120 11.1 10.7 104 14.8 16.0 92
Younts Peak 8350 17.0 14.2 120 13.7 14.4 95
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Basin Index (%) 108 101
POWDER RIVER
Bear Trap Meadow 8200 9.2 5.9 156 9.3 8.1 115
Cloud Peak Reservoir 9860 14.8 14.3 103 14.3 13.2 108
Grave Springs 8550 9.9 8.2 121 10.3 8.9 116
Hansen Sawmill 8360 8.6 6.4 134 8.7 8.2 106
Middle Powder 7760 11.7 10.8 108 9.7 9.6 101
Powder River Pass 9480 11.0 10.4 106 13.5 12.3 110
Soldier Park 8720 9.0 7.4 122 8.3 8.9 93
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Basin Index (%) 117 107
TONGUE RIVER
Big Goose 7990 10.3 8.6 120 10.8 9.6 112
Bone Springs Div 9350 15.3 16.6 92 12.1 15.0 81
Burgess Junction 7880 12.7 10.6 120 13.9 11.4 122
Dome Lake 8880 11.7 11.5 102 11.7 12.4 94
Little Goose 8870 11.4 9.4 121 12.0 11.6 103
Sucker Creek 8880 13.9 11.8 118 16.4 13.3 123
Tie Creek 6870 9.5 4.8 198 12.7 10.3 123
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Basin Index (%) 116 107
BELLE FOURCHE
Blind Park 6890 9.4 7.0 134 11.3 10.6 107
Cole Canyon 5910 8.7 5.6 155 10.1 9.0 112
North Rapid Creek 6130 7.9 6.5 122 8.8 8.6 102
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Basin Index (%) 136 107
CHEYENNE RIVER BASIN
Blind Park 6890 9.4 7.0 134 11.3 10.6 107
North Rapid Creek 6130 7.9 6.5 122 8.8 8.6 102
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Basin Index (%) 128 105
UPPER N. PLATTE
Arapaho Ridge 10976 25.6 21.4 120 24.3 21.2 115
Blackhall Mtn 9839 38.6 30.4 127 37.2 29.1 128
Cinnabar Park 9707 21.2 20.4 104 22.7 23.3 97
Columbine 9167 31.0 22.0 141 27.0 23.4 115
Divide Peak 8730 29.2 19.6 149 28.8 21.2 136
Joe Wright 10158 25.1 20.0 126 26.7 25.2 106
Laprele Creek 8390 11.9 9.5 125 12.2 11.6 105
Med Bow 10512 39.8 -M * 34.6 -M *
Never Summer 10323 25.2 20.2 125 18.2 16.6 110
North French Creek 10153 30.6 28.2 109 29.0 26.2 111
Old Battle 9860 41.3 30.4 136 41.8 33.6 124
Rawah 9069 15.3 10.7 143 16.7 15.0 111
Sage Creek Basin 7850 26.2 13.1 200 20.6 12.8 161
Sand Lake 10098 28.4 26.8 106 27.0 24.2 112
South Brush Creek 8495 15.8 12.0 132 14.3 13.6 105
Tower 10620 52.2 42.2 124 39.8 38.4 104
Webber Springs 9260 30.4 22.0 138 31.8 25.2 126
Whiskey Park 9020 40.6 26.7 152 35.4 26.8 132
Willow Creek Pass 9523 17.6 12.8 138 17.1 13.3 129
Zirkel 9338 34.2 27.6 124 35.0 30.4 115
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Basin Index (%) 130 117
SWEETWATER
Deer Park 9700 23.2 14.5 160 23.3 17.2 135
Larsen Creek 9000 12.1 10.2 119 14.3 13.4 107
South Pass 9040 18.5 14.6 127 18.1 15.0 121
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Basin Index (%) 137 122
LOWER N. PLATTE
Casper Mtn. 7920 13.0 13.0 100 12.8 13.4 96
Laprele Creek 8390 11.9 9.5 125 12.2 11.6 105
Reno Hill 8430 14.8 13.9 106 15.9 14.5 110
Windy Peak 7915 10.9 8.0 136 11.5 10.1 114
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Basin Index (%) 114 106
LARAMIE RIVER
Brooklyn Lake 10250 25.0 21.2 118 24.9 21.2 117
Cinnabar Park 9707 21.2 20.4 104 22.7 23.3 97
Crow Creek 8335 5.4 6.3 86 8.6 10.5 82
Deadman Hill 10239 19.2 15.8 122 17.6 17.2 102
Rawah 9069 15.3 10.7 143 16.7 15.0 111
Roach 9740 18.4 15.4 119 20.6 18.2 113
Windy Peak 7915 10.9 8.0 136 11.5 10.1 114
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Basin Index (%) 118 106
S. PLATTE
Crow Creek 8335 5.4 6.3 86 8.6 10.5 82
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Basin Index (%) 86 82
LITTLE SNAKE RIVER
Battle Mountain 7498 18.8 10.6 177 22.5 14.6 154
Divide Peak 8730 29.2 19.6 149 28.8 21.2 136
Elk River 8739 29.9 18.0 166 27.3 18.7 146
Elkhead Divide 8800 33.3 -M * -M -M *
Little Snake River 8928 39.9 26.0 153 42.4 31.3 135
Old Battle 9860 41.3 30.4 136 41.8 33.6 124
Sage Creek Basin 7850 26.2 13.1 200 20.6 12.8 161
Sandstone RS 8152 26.2 12.6 208 26.4 17.2 153
Whiskey Park 9020 40.6 26.7 152 35.4 26.8 132
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Basin Index (%) 161 139
UPPER GREEN RIVER
Big Sandy Opening 9080 15.1 12.9 117 15.1 12.4 122
Blind Bull Sum 8650 26.1 23.5 111 17.2 17.5 98
East Rim Divide 7930 12.7 10.5 121 12.0 10.9 110
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 14.1 12.7 111 13.2 13.4 99
Indian Creek 9425 28.5 23.4 122 23.7 19.4 122
Kendall R.S. 7740 13.4 11.3 119 13.3 13.0 102
Larsen Creek 9000 12.1 10.2 119 14.3 13.4 107
Loomis Park 8240 17.1 15.4 111 17.1 16.5 104
New Fork Lake 8340 11.6 10.5 110 -M 10.6 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 15.3 12.6 121 15.8 13.8 114
Spring Creek Divide 9000 27.8 24.6 113 -M 23.2 *
Triple Peak 8500 25.3 22.6 112 25.7 24.6 104
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Basin Index (%) 113 106
LOWER GREEN RIVER
Blacks Fork Jct 8869 13.4 9.0 149 14.0 12.2 115
Buck Pasture 9632 20.4 -M * 20.4 -M *
EF Blacks Fork GS 9360 14.1 11.4 124 10.9 10.8 101
Hams Fork 7840 16.3 11.2 146 14.4 11.0 131
Henrys Fork 10182 -M -M * 14.1 -M *
Hewinta 9500 12.9 10.5 123 15.6 13.4 116
Hickerson Park 9122 10.8 7.2 150 10.8 10.0 108
Hole-in-Rock 9168 9.7 7.0 139 10.6 9.7 109
Indian Creek 9425 28.5 23.4 122 23.7 19.4 122
Kelley R.S. 8180 21.0 14.8 142 21.1 15.8 134
Spirit Lk 10235 20.5 13.0 158 19.1 16.8 114
Steel Creek Park 10158 19.4 14.2 137 19.0 16.1 118
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Basin Index (%) 137 118
UPPER BEAR RIVER
Bear River RS 8777 14.1 9.4 150 15.4 11.8 131
Bug Lake 7987 30.7 18.6 165 25.0 17.8 140
Burts Miller Ranch 8000 10.2 6.1 167 13.7 7.7 178
Chalk Creek #1 9171 32.9 22.8 144 27.2 22.4 121
Giveout 6930 16.5 8.0 206 15.8 11.6 136
Hayden Fork 9130 24.0 14.8 162 27.2 19.9 137
Kelley R.S. 8180 21.0 14.8 142 21.1 15.8 134
Lily Lake 9133 15.3 12.4 123 16.9 14.7 115
Monte Cristo 8932 43.0 26.8 160 38.9 26.0 150
Salt River Summit 7640 20.3 13.4 151 19.0 15.8 120
Spring Creek Divide 9000 27.8 24.6 113 -M 23.2 *
Trial Lake 9992 36.3 21.4 170 34.0 22.0 155
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Basin Index (%) 151 137
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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.
