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: MARCH 27 , 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 18.0 16.2 111 19.3 19.3 100
Blind Bull Sum 8650 23.9 23.3 103 16.7 17.4 96
Cottonwood Creek 7670 24.2 20.8 116 -M 24.0 *
East Rim Divide 7930 11.8 10.5 112 11.2 10.6 106
Grand Targhee 9260 43.2 39.2 110 22.6 28.8 78
Granite Creek 6770 -M 15.4 * -M 17.2 *
Grassy Lake 7265 33.7 31.1 108 36.8 32.8 112
Gros Ventre Summit 8750 11.5 12.0 96 10.5 11.6 91
Gunsight Pass 9820 13.3 12.4 107 12.4 13.1 95
Lewis Lake Divide 7850 34.8 29.4 118 30.7 31.2 98
Loomis Park 8240 15.8 15.0 105 15.9 16.2 98
Phillips Bench 8200 28.9 25.2 115 25.9 25.8 100
Salt River Summit 7640 18.5 12.9 143 17.6 14.8 119
Snake River Station 6920 19.4 16.6 117 21.8 20.8 105
Somsen Ranch 6800 19.5 11.9 164 20.5 15.2 135
Spring Creek Divide 9000 25.5 23.7 108 18.7 22.6 83
Thumb Divide 7980 19.7 15.4 128 18.1 16.6 109
Togwotee Pass 9580 21.7 22.7 96 19.8 23.4 85
Triple Peak 8500 23.2 22.2 105 23.5 24.4 96
Two Ocean Plateau 9240 30.0 27.4 109 20.9 24.8 84
Willow Creek 8080 35.0 28.4 123 33.7 30.8 109
Younts Peak 8350 15.8 13.8 114 12.7 13.8 92
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Basin Index (%) 113 99
MADISON HEADWATERS IN WYOMING
Black Bear 8170 43.6 35.9 121 40.1 34.3 117
Canyon 7870 14.1 -M * 16.4 -M *
Madison Plateau 7750 29.0 21.2 137 27.4 22.6 121
West Yellowstone 6700 16.2 10.2 159 18.8 13.2 142
Whiskey Creek 6800 20.7 14.4 144 24.7 18.3 135
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Basin Index (%) 134 126
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 18.2 20.8 88 16.8 19.0 88
Canyon 7870 14.1 -M * 16.4 -M *
Evening Star 9200 25.3 24.1 105 27.1 26.6 102
Fisher Creek 9100 32.9 30.8 107 33.3 30.8 108
Monument Peak 8850 21.2 19.3 110 23.6 19.9 119
Northeast Entrance 7350 10.0 9.5 105 12.1 12.4 98
Parker Peak 9400 23.0 19.9 116 22.3 19.1 117
Sylvan Lake 8420 19.9 18.6 107 22.1 21.2 104
Thumb Divide 7980 19.7 15.4 128 18.1 16.6 109
Two Ocean Plateau 9240 30.0 27.4 109 20.9 24.8 84
White Mill 8700 23.7 22.8 104 22.3 21.8 102
Wolverine 7650 13.2 11.0 120 12.5 11.7 107
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Basin Index (%) 108 103
WIND RIVER
Burroughs Creek 8750 10.6 -M * 10.4 -M *
Castle Creek 8400 6.2 6.8 91 6.8 8.0 85
Cold Springs 9630 7.6 6.9 110 9.0 8.2 110
Deer Park 9700 22.6 13.7 165 22.8 16.4 139
Hobbs Park 10100 14.6 13.0 112 13.6 11.4 119
Kirwin 9550 9.8 10.0 98 11.8 10.7 110
Little Warm 9370 10.1 9.9 102 11.4 11.3 101
South Pass 9040 18.2 13.8 132 17.5 14.2 123
St. Lawrence Alt 8620 7.0 -M * 9.1 -M *
Togwotee Pass 9580 21.7 22.7 96 19.8 23.4 85
Townsend Creek 8700 10.7 8.2 130 11.7 9.7 121
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Basin Index (%) 116 110
BIGHORN BASIN
Bald Mtn. 9380 17.6 17.0 104 14.4 15.0 96
Bear Trap Meadow 8200 8.9 6.0 148 8.9 7.4 120
Bone Springs Div 9350 14.3 15.2 94 11.5 14.1 82
Grave Springs 8550 9.5 7.8 122 9.9 8.7 114
Kirwin 9550 9.8 10.0 98 11.8 10.7 110
Marquette 8760 8.2 6.6 124 8.8 8.1 109
Middle Powder 7760 11.0 9.8 112 9.2 9.1 101
Owl Creek 8975 7.3 5.1 143 7.7 5.4 143
Powder River Pass 9480 10.8 10.4 104 12.9 11.6 111
Shell Creek 9580 13.3 14.2 94 13.5 12.9 105
Timber Creek 7950 6.0 4.1 146 6.6 6.9 96
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Basin Index (%) 110 105
SHOSHONE RIVER
Blackwater 9780 20.0 21.0 95 20.0 20.6 97
Evening Star 9200 25.3 24.1 105 27.1 26.6 102
Marquette 8760 8.2 6.6 124 8.8 8.1 109
Sylvan Lake 8420 19.9 18.6 107 22.1 21.2 104
Sylvan Road 7120 10.9 11.2 97 14.3 15.2 94
Younts Peak 8350 15.8 13.8 114 12.7 13.8 92
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Basin Index (%) 105 100
POWDER RIVER
Bear Trap Meadow 8200 8.9 6.0 148 8.9 7.4 120
Cloud Peak Reservoir 9860 14.0 13.6 103 13.5 12.0 112
Grave Springs 8550 9.5 7.8 122 9.9 8.7 114
Hansen Sawmill 8360 8.1 6.0 135 8.4 7.8 108
Middle Powder 7760 11.0 9.8 112 9.2 9.1 101
Powder River Pass 9480 10.8 10.4 104 12.9 11.6 111
Soldier Park 8720 8.3 6.4 130 7.8 8.2 95
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Basin Index (%) 118 109
TONGUE RIVER
Big Goose 7990 9.5 7.4 128 10.1 9.0 112
Bone Springs Div 9350 14.3 15.2 94 11.5 14.1 82
Burgess Junction 7880 11.8 9.8 120 13.2 10.6 125
Dome Lake 8880 10.7 10.6 101 11.0 11.4 96
Little Goose 8870 10.6 8.8 120 11.3 10.8 105
Sucker Creek 8880 13.2 11.1 119 15.6 12.4 126
Tie Creek 6870 8.9 4.6 193 12.2 9.5 128
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Basin Index (%) 117 109
BELLE FOURCHE
Blind Park 6890 9.0 6.8 132 10.5 10.0 105
Cole Canyon 5910 8.3 5.3 157 9.4 8.0 118
North Rapid Creek 6130 7.7 6.6 117 8.3 8.3 100
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Basin Index (%) 134 107
CHEYENNE RIVER BASIN
Blind Park 6890 9.0 6.8 132 10.5 10.0 105
North Rapid Creek 6130 7.7 6.6 117 8.3 8.3 100
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Basin Index (%) 125 103
UPPER N. PLATTE
Arapaho Ridge 10976 24.7 20.3 122 23.5 20.4 115
Blackhall Mtn 9839 37.0 28.6 129 35.8 27.6 130
Cinnabar Park 9707 -M 19.4 * 22.3 22.0 101
Columbine 9167 28.1 21.5 131 24.7 22.4 110
Divide Peak 8730 27.7 18.0 154 27.7 20.4 136
Joe Wright 10158 24.2 19.2 126 25.5 24.2 105
Laprele Creek 8390 11.5 9.1 126 11.8 10.8 109
Med Bow 10512 38.3 -M * 31.1 -M *
Never Summer 10323 24.8 18.9 131 17.5 16.0 109
North French Creek 10153 29.3 26.2 112 28.2 24.3 116
Old Battle 9860 40.1 28.2 142 30.9 31.1 99
Rawah 9069 14.8 10.2 145 16.3 14.2 115
Sage Creek Basin 7850 25.1 12.3 204 20.2 12.0 168
Sand Lake 10098 27.2 24.8 110 25.8 22.8 113
South Brush Creek 8495 15.3 11.4 134 14.0 12.6 111
Tower 10620 49.5 40.2 123 -M 37.2 *
Webber Springs 9260 29.3 20.8 141 30.7 23.8 129
Whiskey Park 9020 38.4 24.9 154 34.1 25.8 132
Willow Creek Pass 9523 17.3 12.2 142 16.6 12.8 130
Zirkel 9338 31.9 27.0 118 33.1 29.2 113
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Basin Index (%) 133 118
SWEETWATER
Deer Park 9700 22.6 13.7 165 22.8 16.4 139
Larsen Creek 9000 11.2 10.6 106 13.8 12.4 111
South Pass 9040 18.2 13.8 132 17.5 14.2 123
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Basin Index (%) 136 126
LOWER N. PLATTE
Casper Mtn. 7920 12.8 12.4 103 12.5 12.6 99
Laprele Creek 8390 11.5 9.1 126 11.8 10.8 109
Reno Hill 8430 14.0 12.8 109 15.2 12.7 120
Windy Peak 7915 10.4 7.8 133 11.0 9.1 121
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Basin Index (%) 116 112
LARAMIE RIVER
Brooklyn Lake 10250 24.2 20.0 121 24.0 20.3 118
Cinnabar Park 9707 -M 19.4 * 22.3 22.0 101
Crow Creek 8335 5.2 5.9 88 8.3 9.9 84
Deadman Hill 10239 18.6 15.4 121 17.2 16.2 106
Rawah 9069 14.8 10.2 145 16.3 14.2 115
Roach 9740 17.9 14.4 124 19.8 17.2 115
Windy Peak 7915 10.4 7.8 133 11.0 9.1 121
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Basin Index (%) 124 109
S. PLATTE
Crow Creek 8335 5.2 5.9 88 8.3 9.9 84
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Basin Index (%) 88 84
LITTLE SNAKE RIVER
Battle Mountain 7498 17.9 11.0 163 21.6 14.0 154
Divide Peak 8730 27.7 18.0 154 27.7 20.4 136
Elk River 8739 28.6 17.4 164 25.4 17.6 144
Elkhead Divide 8800 32.0 -M * -M -M *
Little Snake River 8928 38.2 24.9 153 37.2 30.1 124
Old Battle 9860 40.1 28.2 142 30.9 31.1 99
Sage Creek Basin 7850 25.1 12.3 204 20.2 12.0 168
Sandstone RS 8152 -M 12.2 * 24.5 16.7 147
Whiskey Park 9020 38.4 24.9 154 34.1 25.8 132
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Basin Index (%) 158 132
UPPER GREEN RIVER
Big Sandy Opening 9080 14.3 12.6 113 14.5 12.0 121
Blind Bull Sum 8650 23.9 23.3 103 16.7 17.4 96
East Rim Divide 7930 11.8 10.5 112 11.2 10.6 106
Elkhart Park G.S. 9400 11.7 11.9 98 11.0 12.0 92
Gros Ventre Summit 8750 11.5 12.0 96 10.5 11.6 91
Gunsight Pass 9820 13.3 12.4 107 12.4 13.1 95
Indian Creek 9425 26.3 22.2 118 22.2 18.2 122
Kendall R.S. 7740 12.2 11.2 109 12.4 12.7 98
Larsen Creek 9000 11.2 10.6 106 13.8 12.4 111
Loomis Park 8240 15.8 15.0 105 15.9 16.2 98
New Fork Lake 8340 10.8 10.1 107 -M 10.0 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 14.0 12.3 114 14.7 13.2 111
Spring Creek Divide 9000 25.5 23.7 108 18.7 22.6 83
Triple Peak 8500 23.2 22.2 105 23.5 24.4 96
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Basin Index (%) 107 101
LOWER GREEN RIVER
Blacks Fork Jct 8869 12.7 8.0 159 13.3 11.4 117
Buck Pasture 9632 19.2 -M * 19.8 -M *
EF Blacks Fork GS 9360 13.4 11.0 122 10.2 10.0 102
Hams Fork 7840 14.9 10.6 141 13.3 10.4 128
Henrys Fork 10182 -M -M * -M -M *
Hewinta 9500 12.4 9.6 129 14.7 12.2 120
Hickerson Park 9122 9.8 7.2 136 10.4 9.3 112
Hole-in-Rock 9168 8.8 7.0 126 9.8 9.0 109
Indian Creek 9425 26.3 22.2 118 22.2 18.2 122
Kelley R.S. 8180 19.3 14.2 136 19.6 15.2 129
Spirit Lk 10235 19.4 11.8 164 18.2 15.6 117
Steel Creek Park 10158 18.4 13.6 135 17.7 14.8 120
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Basin Index (%) 135 118
UPPER BEAR RIVER
Bear River RS 8777 13.8 8.5 162 14.6 11.1 132
Bug Lake 7987 27.6 17.7 156 22.7 16.8 135
Burts Miller Ranch 8000 9.6 5.6 171 13.0 7.1 183
Chalk Creek #1 9171 30.8 21.4 144 26.9 21.2 127
Giveout 6930 14.7 7.9 186 14.7 11.2 131
Hayden Fork 9130 22.0 14.0 157 24.3 18.8 129
Kelley R.S. 8180 19.3 14.2 136 19.6 15.2 129
Lily Lake 9133 14.7 11.9 124 16.0 14.0 114
Monte Cristo 8932 38.3 25.2 152 35.0 24.1 145
Salt River Summit 7640 18.5 12.9 143 17.6 14.8 119
Spring Creek Divide 9000 25.5 23.7 108 18.7 22.6 83
Trial Lake 9992 34.4 20.8 165 33.0 20.8 159
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Basin Index (%) 146 130
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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.
