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 FRIDAY: MARCH 17 , 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 16.2 16.0 101 17.9 18.2 98
Blind Bull Sum 8650 22.2 21.6 103 15.4 16.2 95
Cottonwood Creek 7670 22.0 19.4 113 23.0 22.4 103
East Rim Divide 7930 10.6 10.0 106 10.1 10.1 100
Grand Targhee 9260 38.4 36.5 105 22.3 27.0 83
Granite Creek 6770 -M 15.6 * -M 16.8 *
Grassy Lake 7265 31.0 29.2 106 33.9 31.6 107
Gros Ventre Summit 8750 10.8 11.1 97 9.8 11.0 89
Gunsight Pass 9820 11.7 11.9 98 11.0 12.4 89
Lewis Lake Divide 7850 32.6 27.5 119 30.7 29.4 104
Loomis Park 8240 14.2 13.8 103 14.4 15.2 95
Phillips Bench 8200 26.8 23.2 116 25.5 23.7 108
Salt River Summit 7640 17.3 12.2 142 16.6 13.7 121
Snake River Station 6920 18.2 16.1 113 20.3 19.6 104
Somsen Ranch 6800 17.4 11.7 149 18.5 14.6 127
Spring Creek Divide 9000 23.8 22.2 107 -M 21.6 *
Thumb Divide 7980 18.9 14.3 132 17.5 15.4 114
Togwotee Pass 9580 19.8 20.9 95 18.5 22.3 83
Triple Peak 8500 21.8 21.6 101 22.1 23.2 95
Two Ocean Plateau 9240 28.2 25.8 109 21.0 23.2 91
Willow Creek 8080 31.9 26.5 120 30.8 29.0 106
Younts Peak 8350 14.8 13.2 112 11.7 13.0 90
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Basin Index (%) 111 100
MADISON HEADWATERS IN WYOMING
Black Bear 8170 40.2 34.2 118 37.2 32.9 113
Canyon 7870 13.1 -M * 15.3 -M *
Madison Plateau 7750 27.0 20.2 134 26.3 21.8 121
West Yellowstone 6700 15.5 10.2 152 18.0 12.9 140
Whiskey Creek 6800 19.4 14.6 133 24.0 17.4 138
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Basin Index (%) 129 124
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 16.6 19.6 85 15.4 18.0 86
Canyon 7870 13.1 -M * 15.3 -M *
Evening Star 9200 24.2 23.3 104 25.9 25.6 101
Fisher Creek 9100 31.8 28.3 112 31.8 28.5 112
Monument Peak 8850 19.8 18.2 109 22.1 18.8 118
Northeast Entrance 7350 9.4 9.6 98 11.6 11.8 98
Parker Peak 9400 21.0 18.7 112 20.5 18.2 113
Sylvan Lake 8420 18.1 18.0 101 21.3 20.4 104
Thumb Divide 7980 18.9 14.3 132 17.5 15.4 114
Two Ocean Plateau 9240 28.2 25.8 109 21.0 23.2 91
White Mill 8700 22.8 21.4 107 21.4 20.7 103
Wolverine 7650 12.2 10.9 112 11.3 11.0 103
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Basin Index (%) 107 104
WIND RIVER
Burroughs Creek 8750 9.4 -M * 9.6 -M *
Castle Creek 8400 5.3 6.9 77 5.9 7.8 76
Cold Springs 9630 7.3 6.4 114 8.7 7.6 114
Deer Park 9700 21.6 11.8 183 21.8 14.9 146
Hobbs Park 10100 13.8 11.6 119 12.8 10.4 123
Kirwin 9550 8.8 9.4 94 11.0 10.1 109
Little Warm 9370 9.1 8.9 102 10.2 10.8 94
South Pass 9040 17.5 12.8 137 16.5 12.7 130
St. Lawrence Alt 8620 6.4 -M * 8.5 -M *
Togwotee Pass 9580 19.8 20.9 95 18.5 22.3 83
Townsend Creek 8700 10.4 7.8 133 11.3 8.9 127
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Basin Index (%) 118 111
BIGHORN BASIN
Bald Mtn. 9380 16.2 16.4 99 13.1 13.9 94
Bear Trap Meadow 8200 8.0 5.6 143 8.0 7.0 114
Bone Springs Div 9350 13.2 14.1 94 10.5 13.0 81
Grave Springs 8550 8.9 7.6 117 9.3 8.0 116
Kirwin 9550 8.8 9.4 94 11.0 10.1 109
Marquette 8760 6.3 6.0 105 6.9 7.2 96
Middle Powder 7760 10.1 9.0 112 8.5 8.6 99
Owl Creek 8975 6.1 4.7 130 6.6 5.0 132
Powder River Pass 9480 10.0 9.6 104 12.0 10.7 112
Shell Creek 9580 11.9 12.9 92 12.2 11.8 103
Timber Creek 7950 4.6 4.3 107 5.2 6.3 83
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Basin Index (%) 105 102
SHOSHONE RIVER
Blackwater 9780 18.5 20.2 92 18.7 19.2 97
Evening Star 9200 24.2 23.3 104 25.9 25.6 101
Marquette 8760 6.3 6.0 105 6.9 7.2 96
Sylvan Lake 8420 18.1 18.0 101 21.3 20.4 104
Sylvan Road 7120 10.2 10.6 96 13.9 14.9 93
Younts Peak 8350 14.8 13.2 112 11.7 13.0 90
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Basin Index (%) 101 98
POWDER RIVER
Bear Trap Meadow 8200 8.0 5.6 143 8.0 7.0 114
Cloud Peak Reservoir 9860 12.6 12.6 100 12.2 11.0 111
Grave Springs 8550 8.9 7.6 117 9.3 8.0 116
Hansen Sawmill 8360 7.3 5.8 126 7.5 7.2 104
Middle Powder 7760 10.1 9.0 112 8.5 8.6 99
Powder River Pass 9480 10.0 9.6 104 12.0 10.7 112
Soldier Park 8720 7.1 5.9 120 6.7 8.0 84
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Basin Index (%) 114 106
TONGUE RIVER
Big Goose 7990 8.8 7.1 124 9.4 8.6 109
Bone Springs Div 9350 13.2 14.1 94 10.5 13.0 81
Burgess Junction 7880 11.1 9.4 118 12.3 10.0 123
Dome Lake 8880 9.9 10.0 99 10.2 10.4 98
Little Goose 8870 9.6 8.2 117 10.4 9.8 106
Sucker Creek 8880 12.2 10.6 115 14.6 11.8 124
Tie Creek 6870 8.3 4.6 180 11.5 9.0 128
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Basin Index (%) 114 109
BELLE FOURCHE
Blind Park 6890 8.3 7.0 119 9.9 9.4 105
Cole Canyon 5910 7.8 5.0 156 9.1 7.6 120
North Rapid Creek 6130 7.1 6.4 111 7.9 7.8 101
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Basin Index (%) 126 108
CHEYENNE RIVER BASIN
Blind Park 6890 8.3 7.0 119 9.9 9.4 105
North Rapid Creek 6130 7.1 6.4 111 7.9 7.8 101
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Basin Index (%) 115 103
UPPER N. PLATTE
Arapaho Ridge 10976 21.7 18.8 115 20.8 19.1 109
Blackhall Mtn 9839 34.3 25.9 132 33.6 25.2 133
Cinnabar Park 9707 19.6 18.1 108 21.1 21.0 100
Columbine 9167 25.5 20.9 122 -M 21.0 *
Divide Peak 8730 25.7 17.0 151 26.1 18.2 143
Joe Wright 10158 20.7 18.0 115 22.8 22.6 101
Laprele Creek 8390 10.8 8.4 129 11.2 9.9 113
Med Bow 10512 35.8 -M * 30.7 -M *
Never Summer 10323 22.2 17.4 128 15.4 14.5 106
North French Creek 10153 27.3 24.1 113 26.7 22.6 118
Old Battle 9860 36.8 26.0 142 30.6 28.6 107
Rawah 9069 13.0 9.5 137 14.7 13.2 111
Sage Creek Basin 7850 23.4 12.2 192 19.1 11.2 171
Sand Lake 10098 25.9 22.6 115 24.5 20.7 118
South Brush Creek 8495 14.3 10.4 138 13.1 11.6 113
Tower 10620 45.0 38.0 118 38.8 35.0 111
Webber Springs 9260 27.0 19.2 141 28.7 21.6 133
Whiskey Park 9020 35.6 24.0 148 31.9 24.0 133
Willow Creek Pass 9523 15.0 11.2 134 14.8 11.8 125
Zirkel 9338 29.1 25.4 115 30.8 26.9 114
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Basin Index (%) 129 119
SWEETWATER
Deer Park 9700 21.6 11.8 183 21.8 14.9 146
Larsen Creek 9000 10.3 10.4 99 13.1 11.4 115
South Pass 9040 17.5 12.8 137 16.5 12.7 130
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Basin Index (%) 141 132
LOWER N. PLATTE
Casper Mtn. 7920 12.2 10.9 112 12.0 11.2 107
Laprele Creek 8390 10.8 8.4 129 11.2 9.9 113
Reno Hill 8430 13.3 11.6 115 14.7 11.9 124
Windy Peak 7915 10.0 6.8 147 10.5 8.2 128
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Basin Index (%) 123 117
LARAMIE RIVER
Brooklyn Lake 10250 23.0 17.6 131 23.1 18.3 126
Cinnabar Park 9707 19.6 18.1 108 21.1 21.0 100
Crow Creek 8335 4.9 6.5 75 7.7 9.3 83
Deadman Hill 10239 16.8 14.6 115 15.5 14.8 105
Rawah 9069 13.0 9.5 137 14.7 13.2 111
Roach 9740 16.3 13.6 120 18.3 15.7 117
Windy Peak 7915 10.0 6.8 147 10.5 8.2 128
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Basin Index (%) 119 110
S. PLATTE
Crow Creek 8335 4.9 6.5 75 7.7 9.3 83
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Basin Index (%) 75 83
LITTLE SNAKE RIVER
Battle Mountain 7498 16.3 10.9 150 20.3 13.0 156
Divide Peak 8730 25.7 17.0 151 26.1 18.2 143
Elk River 8739 26.1 16.6 157 24.4 16.3 150
Elkhead Divide 8800 28.7 -M * -M -M *
Little Snake River 8928 34.9 23.8 147 36.9 28.0 132
Old Battle 9860 36.8 26.0 142 30.6 28.6 107
Sage Creek Basin 7850 23.4 12.2 192 19.1 11.2 171
Sandstone RS 8152 22.0 11.2 196 22.4 15.9 141
Whiskey Park 9020 35.6 24.0 148 31.9 24.0 133
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Basin Index (%) 156 136
UPPER GREEN RIVER
Big Sandy Opening 9080 13.5 11.6 116 13.6 11.0 124
Blind Bull Sum 8650 22.2 21.6 103 15.4 16.2 95
East Rim Divide 7930 10.6 10.0 106 10.1 10.1 100
Elkhart Park G.S. 9400 10.6 11.0 96 10.0 11.0 91
Gros Ventre Summit 8750 10.8 11.1 97 9.8 11.0 89
Gunsight Pass 9820 11.7 11.9 98 11.0 12.4 89
Indian Creek 9425 24.5 20.6 119 21.0 17.4 121
Kendall R.S. 7740 11.1 11.0 101 11.5 12.1 95
Larsen Creek 9000 10.3 10.4 99 13.1 11.4 115
Loomis Park 8240 14.2 13.8 103 14.4 15.2 95
New Fork Lake 8340 9.9 9.6 103 -M 9.5 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 13.0 11.9 109 13.8 12.6 110
Spring Creek Divide 9000 23.8 22.2 107 -M 21.6 *
Triple Peak 8500 21.8 21.6 101 22.1 23.2 95
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Basin Index (%) 105 101
LOWER GREEN RIVER
Blacks Fork Jct 8869 12.1 7.6 159 12.7 10.5 121
Buck Pasture 9632 18.0 -M * 19.2 -M *
EF Blacks Fork GS 9360 12.6 10.1 125 9.9 9.6 103
Hams Fork 7840 14.0 10.2 137 12.4 9.4 132
Henrys Fork 10182 -M -M * 14.4 -M *
Hewinta 9500 11.3 8.8 128 14.0 11.2 125
Hickerson Park 9122 9.4 6.8 138 9.9 8.7 114
Hole-in-Rock 9168 8.4 6.2 135 9.2 8.4 110
Indian Creek 9425 24.5 20.6 119 21.0 17.4 121
Kelley R.S. 8180 18.1 13.0 139 18.6 14.4 129
Spirit Lk 10235 17.8 10.4 171 16.8 14.4 117
Steel Creek Park 10158 17.5 12.6 139 17.2 13.1 131
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Basin Index (%) 137 121
UPPER BEAR RIVER
Bear River RS 8777 13.2 8.4 157 14.2 10.1 141
Bug Lake 7987 25.6 16.6 154 21.0 15.5 135
Burts Miller Ranch 8000 9.3 4.7 198 12.4 6.5 191
Chalk Creek #1 9171 28.0 19.8 141 26.9 20.4 132
Giveout 6930 13.3 8.2 162 13.6 10.4 131
Hayden Fork 9130 19.7 13.2 149 23.8 17.4 137
Kelley R.S. 8180 18.1 13.0 139 18.6 14.4 129
Lily Lake 9133 13.9 11.2 124 15.4 13.6 113
Monte Cristo 8932 34.4 23.6 146 31.6 21.9 144
Salt River Summit 7640 17.3 12.2 142 16.6 13.7 121
Spring Creek Divide 9000 23.8 22.2 107 -M 21.6 *
Trial Lake 9992 31.7 19.6 162 29.7 19.4 153
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Basin Index (%) 144 137
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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.
