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 TUESDAY: MARCH 21 , 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 16.4 16.2 101 18.0 18.6 97
Blind Bull Sum 8650 23.0 22.3 103 15.6 16.6 94
Cottonwood Creek 7670 22.2 19.8 112 23.2 22.6 103
East Rim Divide 7930 11.2 10.0 112 10.7 10.3 104
Grand Targhee 9260 39.4 37.2 106 -M 28.0 *
Granite Creek 6770 -M 15.8 * -M 16.9 *
Grassy Lake 7265 31.5 29.8 106 34.6 32.0 108
Gros Ventre Summit 8750 11.1 11.4 97 10.3 11.1 93
Gunsight Pass 9820 12.1 12.1 100 11.5 12.7 91
Lewis Lake Divide 7850 33.2 29.0 114 -M 29.6 *
Loomis Park 8240 14.8 14.2 104 15.0 15.6 96
Phillips Bench 8200 27.3 23.6 116 25.7 24.0 107
Salt River Summit 7640 17.7 12.3 144 16.9 13.8 122
Snake River Station 6920 18.5 16.5 112 20.3 19.8 103
Somsen Ranch 6800 17.7 11.5 154 18.8 14.7 128
Spring Creek Divide 9000 24.3 22.6 108 -M 22.0 *
Thumb Divide 7980 19.0 14.8 128 17.7 15.5 114
Togwotee Pass 9580 20.2 21.6 94 18.6 22.6 82
Triple Peak 8500 22.2 21.8 102 22.7 23.2 98
Two Ocean Plateau 9240 28.6 26.5 108 -M 23.5 *
Willow Creek 8080 32.9 27.0 122 31.4 30.0 105
Younts Peak 8350 15.4 13.6 113 12.5 13.2 95
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Basin Index (%) 111 102
MADISON HEADWATERS IN WYOMING
Black Bear 8170 40.9 36.2 113 37.9 33.4 113
Canyon 7870 13.4 -M * 15.7 -M *
Madison Plateau 7750 27.7 20.6 134 26.7 22.4 119
West Yellowstone 6700 15.6 10.2 153 18.1 13.0 139
Whiskey Creek 6800 19.8 14.4 138 24.1 17.6 137
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Basin Index (%) 128 124
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 17.0 20.0 85 15.8 18.3 86
Canyon 7870 13.4 -M * 15.7 -M *
Evening Star 9200 24.4 23.7 103 26.2 25.8 102
Fisher Creek 9100 32.3 29.8 108 32.7 29.5 111
Monument Peak 8850 20.0 18.8 106 22.4 19.3 116
Northeast Entrance 7350 9.7 9.9 98 11.7 11.9 98
Parker Peak 9400 21.5 19.3 111 21.1 18.4 115
Sylvan Lake 8420 18.4 18.6 99 21.2 20.6 103
Thumb Divide 7980 19.0 14.8 128 17.7 15.5 114
Two Ocean Plateau 9240 28.6 26.5 108 -M 23.5 *
White Mill 8700 23.1 21.6 107 21.8 21.0 104
Wolverine 7650 12.4 10.6 117 11.6 11.2 104
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Basin Index (%) 106 106
WIND RIVER
Burroughs Creek 8750 10.0 -M * 9.8 -M *
Castle Creek 8400 5.5 7.1 77 6.1 7.8 78
Cold Springs 9630 7.5 6.4 117 8.7 7.8 112
Deer Park 9700 21.7 12.8 170 22.0 16.2 136
Hobbs Park 10100 14.0 12.2 115 13.0 11.0 118
Kirwin 9550 9.2 9.4 98 11.4 10.3 111
Little Warm 9370 9.3 9.1 102 10.6 11.0 96
South Pass 9040 17.4 13.4 130 17.1 13.7 125
St. Lawrence Alt 8620 6.6 -M * 8.8 -M *
Togwotee Pass 9580 20.2 21.6 94 18.6 22.6 82
Townsend Creek 8700 10.4 8.1 128 11.5 9.0 128
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Basin Index (%) 115 109
BIGHORN BASIN
Bald Mtn. 9380 16.4 16.4 100 13.4 14.2 94
Bear Trap Meadow 8200 8.0 5.8 138 8.2 7.2 114
Bone Springs Div 9350 13.4 14.6 92 10.8 13.4 81
Grave Springs 8550 9.0 7.8 115 9.4 8.4 112
Kirwin 9550 9.2 9.4 98 11.4 10.3 111
Marquette 8760 6.4 6.2 103 7.1 7.7 92
Middle Powder 7760 10.2 9.4 109 8.6 8.8 98
Owl Creek 8975 6.2 4.8 129 6.8 5.2 131
Powder River Pass 9480 10.0 9.9 101 12.1 11.2 108
Shell Creek 9580 12.1 13.1 92 12.3 12.0 102
Timber Creek 7950 4.7 4.1 115 5.4 6.6 82
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Basin Index (%) 104 100
SHOSHONE RIVER
Blackwater 9780 18.9 20.4 93 19.2 19.7 97
Evening Star 9200 24.4 23.7 103 26.2 25.8 102
Marquette 8760 6.4 6.2 103 7.1 7.7 92
Sylvan Lake 8420 18.4 18.6 99 21.2 20.6 103
Sylvan Road 7120 10.8 11.3 96 14.0 15.1 93
Younts Peak 8350 15.4 13.6 113 12.5 13.2 95
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Basin Index (%) 101 98
POWDER RIVER
Bear Trap Meadow 8200 8.0 5.8 138 8.2 7.2 114
Cloud Peak Reservoir 9860 12.7 13.2 96 12.2 11.6 105
Grave Springs 8550 9.0 7.8 115 9.4 8.4 112
Hansen Sawmill 8360 7.4 5.8 128 7.7 7.6 101
Middle Powder 7760 10.2 9.4 109 8.6 8.8 98
Powder River Pass 9480 10.0 9.9 101 12.1 11.2 108
Soldier Park 8720 7.3 5.9 124 6.9 8.0 86
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Basin Index (%) 112 104
TONGUE RIVER
Big Goose 7990 8.9 7.3 122 9.4 8.7 108
Bone Springs Div 9350 13.4 14.6 92 10.8 13.4 81
Burgess Junction 7880 11.1 9.5 117 12.5 10.4 120
Dome Lake 8880 10.1 10.2 99 10.3 11.1 93
Little Goose 8870 9.6 8.3 116 10.4 10.0 104
Sucker Creek 8880 12.3 11.0 112 14.7 12.2 120
Tie Creek 6870 8.3 4.8 173 11.6 9.2 126
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Basin Index (%) 112 106
BELLE FOURCHE
Blind Park 6890 8.5 7.2 118 10.1 9.8 103
Cole Canyon 5910 8.1 5.1 159 9.4 7.6 124
North Rapid Creek 6130 7.3 6.5 112 8.0 8.0 100
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Basin Index (%) 127 108
CHEYENNE RIVER BASIN
Blind Park 6890 8.5 7.2 118 10.1 9.8 103
North Rapid Creek 6130 7.3 6.5 112 8.0 8.0 100
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Basin Index (%) 115 102
UPPER N. PLATTE
Arapaho Ridge 10976 22.7 19.4 117 21.7 19.2 113
Blackhall Mtn 9839 35.1 26.9 130 33.9 26.1 130
Cinnabar Park 9707 -M 18.1 * 21.5 21.0 102
Columbine 9167 26.4 21.5 123 23.9 21.7 110
Divide Peak 8730 26.2 17.3 151 26.3 19.2 137
Joe Wright 10158 21.9 18.2 120 23.8 23.2 103
Laprele Creek 8390 11.0 8.8 125 11.5 10.2 113
Med Bow 10512 36.7 -M * 30.9 -M *
Never Summer 10323 22.4 17.8 126 15.9 14.6 109
North French Creek 10153 28.0 24.8 113 27.2 23.5 116
Old Battle 9860 37.6 26.5 142 -M 29.9 *
Rawah 9069 13.6 9.9 137 15.0 13.9 108
Sage Creek Basin 7850 23.7 11.9 199 19.4 11.6 167
Sand Lake 10098 26.2 23.4 112 25.1 22.0 114
South Brush Creek 8495 14.7 10.5 140 13.5 12.2 111
Tower 10620 45.9 38.7 119 -M 36.2 *
Webber Springs 9260 27.5 20.0 138 29.2 22.6 129
Whiskey Park 9020 36.4 24.6 148 32.7 24.8 132
Willow Creek Pass 9523 15.4 11.6 133 15.2 12.1 126
Zirkel 9338 29.6 26.0 114 30.8 27.8 111
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Basin Index (%) 130 119
SWEETWATER
Deer Park 9700 21.7 12.8 170 22.0 16.2 136
Larsen Creek 9000 10.6 10.6 100 13.3 11.6 115
South Pass 9040 17.4 13.4 130 17.1 13.7 125
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Basin Index (%) 135 126
LOWER N. PLATTE
Casper Mtn. 7920 12.4 11.7 106 12.1 11.5 105
Laprele Creek 8390 11.0 8.8 125 11.5 10.2 113
Reno Hill 8430 13.6 12.0 113 14.9 12.0 124
Windy Peak 7915 10.1 6.9 146 10.7 8.5 126
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Basin Index (%) 120 117
LARAMIE RIVER
Brooklyn Lake 10250 23.4 18.6 126 23.4 19.0 123
Cinnabar Park 9707 -M 18.1 * 21.5 21.0 102
Crow Creek 8335 4.9 6.5 75 7.8 9.3 84
Deadman Hill 10239 17.1 14.8 116 15.8 15.6 101
Rawah 9069 13.6 9.9 137 15.0 13.9 108
Roach 9740 16.7 14.2 118 18.7 16.4 114
Windy Peak 7915 10.1 6.9 146 10.7 8.5 126
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Basin Index (%) 121 109
S. PLATTE
Crow Creek 8335 4.9 6.5 75 7.8 9.3 84
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Basin Index (%) 75 84
LITTLE SNAKE RIVER
Battle Mountain 7498 17.2 11.2 154 21.0 13.4 157
Divide Peak 8730 26.2 17.3 151 26.3 19.2 137
Elk River 8739 26.4 16.5 160 24.6 17.0 145
Elkhead Divide 8800 28.2 -M * -M -M *
Little Snake River 8928 36.1 24.4 148 37.1 28.4 131
Old Battle 9860 37.6 26.5 142 -M 29.9 *
Sage Creek Basin 7850 23.7 11.9 199 19.4 11.6 167
Sandstone RS 8152 22.9 11.7 196 23.3 16.5 141
Whiskey Park 9020 36.4 24.6 148 32.7 24.8 132
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Basin Index (%) 157 141
UPPER GREEN RIVER
Big Sandy Opening 9080 13.9 12.0 116 14.1 11.5 123
Blind Bull Sum 8650 23.0 22.3 103 15.6 16.6 94
East Rim Divide 7930 11.2 10.0 112 10.7 10.3 104
Elkhart Park G.S. 9400 11.0 11.2 98 10.4 11.4 91
Gros Ventre Summit 8750 11.1 11.4 97 10.3 11.1 93
Gunsight Pass 9820 12.1 12.1 100 11.5 12.7 91
Indian Creek 9425 25.2 20.8 121 21.5 17.8 121
Kendall R.S. 7740 11.7 11.3 104 11.8 12.3 96
Larsen Creek 9000 10.6 10.6 100 13.3 11.6 115
Loomis Park 8240 14.8 14.2 104 15.0 15.6 96
New Fork Lake 8340 10.2 9.6 106 -M 9.6 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 13.3 12.1 110 14.2 12.8 111
Spring Creek Divide 9000 24.3 22.6 108 -M 22.0 *
Triple Peak 8500 22.2 21.8 102 22.7 23.2 98
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Basin Index (%) 106 103
LOWER GREEN RIVER
Blacks Fork Jct 8869 12.2 7.9 154 12.8 10.7 120
Buck Pasture 9632 18.2 -M * 19.3 -M *
EF Blacks Fork GS 9360 13.2 10.6 125 10.3 9.8 105
Hams Fork 7840 14.1 10.4 136 12.9 9.6 134
Henrys Fork 10182 -M -M * 13.3 -M *
Hewinta 9500 11.9 9.3 128 14.5 12.0 121
Hickerson Park 9122 9.5 7.5 127 10.1 8.8 115
Hole-in-Rock 9168 8.5 6.8 125 9.7 8.6 113
Indian Creek 9425 25.2 20.8 121 21.5 17.8 121
Kelley R.S. 8180 18.7 13.2 142 19.1 14.6 131
Spirit Lk 10235 18.3 11.2 163 17.3 14.4 120
Steel Creek Park 10158 17.6 13.2 133 17.3 13.9 124
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Basin Index (%) 135 121
UPPER BEAR RIVER
Bear River RS 8777 13.2 8.4 157 14.2 10.2 139
Bug Lake 7987 25.9 16.9 153 21.3 15.8 135
Burts Miller Ranch 8000 9.1 5.3 172 12.6 6.7 188
Chalk Creek #1 9171 28.4 20.8 137 27.2 20.6 132
Giveout 6930 13.7 7.8 176 13.9 10.6 131
Hayden Fork 9130 19.9 13.2 151 24.0 18.1 133
Kelley R.S. 8180 18.7 13.2 142 19.1 14.6 131
Lily Lake 9133 14.7 11.2 131 15.5 13.7 113
Monte Cristo 8932 35.2 24.2 145 32.3 22.2 145
Salt River Summit 7640 17.7 12.3 144 16.9 13.8 122
Spring Creek Divide 9000 24.3 22.6 108 -M 22.0 *
Trial Lake 9992 32.2 19.7 163 31.0 19.9 156
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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.
