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 THURSDAY: MARCH 16 , 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 22.1 19.2 115 23.0 22.4 103
East Rim Divide 7930 10.7 10.0 107 10.2 10.1 101
Grand Targhee 9260 38.4 36.0 107 22.4 27.0 83
Granite Creek 6770 -M 15.6 * -M 16.7 *
Grassy Lake 7265 31.1 28.8 108 33.9 31.5 108
Gros Ventre Summit 8750 11.0 11.0 100 9.8 10.7 92
Gunsight Pass 9820 11.8 11.8 100 11.1 12.4 90
Lewis Lake Divide 7850 32.5 27.0 120 30.7 29.0 106
Loomis Park 8240 14.3 13.5 106 14.4 14.9 97
Phillips Bench 8200 27.0 22.8 118 25.5 23.5 109
Salt River Summit 7640 17.3 12.0 144 16.7 13.7 122
Snake River Station 6920 18.0 16.0 112 20.3 19.4 105
Somsen Ranch 6800 17.5 11.8 148 18.6 14.6 127
Spring Creek Divide 9000 24.1 21.7 111 -M 21.1 *
Thumb Divide 7980 19.0 14.2 134 17.5 15.2 115
Togwotee Pass 9580 19.8 20.9 95 18.3 22.2 82
Triple Peak 8500 21.9 21.5 102 22.4 23.1 97
Two Ocean Plateau 9240 28.3 25.7 110 21.0 23.1 91
Willow Creek 8080 31.8 26.4 120 30.8 28.8 107
Younts Peak 8350 15.0 13.2 114 12.0 13.0 92
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Basin Index (%) 112 101
MADISON HEADWATERS IN WYOMING
Black Bear 8170 40.2 33.3 121 37.3 32.8 114
Canyon 7870 13.2 -M * 15.4 -M *
Madison Plateau 7750 26.9 20.2 133 26.3 21.7 121
West Yellowstone 6700 15.3 10.2 150 17.9 12.9 139
Whiskey Creek 6800 19.4 14.3 136 23.7 17.4 136
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Basin Index (%) 131 124
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 16.6 19.5 85 15.4 17.8 87
Canyon 7870 13.2 -M * 15.4 -M *
Evening Star 9200 24.1 23.1 104 25.8 25.4 102
Fisher Creek 9100 31.9 28.3 113 32.0 28.4 113
Monument Peak 8850 19.8 18.2 109 22.2 18.6 119
Northeast Entrance 7350 9.5 9.5 100 11.6 11.7 99
Parker Peak 9400 21.0 18.6 113 20.6 17.8 116
Sylvan Lake 8420 18.2 17.6 103 20.7 20.2 102
Thumb Divide 7980 19.0 14.2 134 17.5 15.2 115
Two Ocean Plateau 9240 28.3 25.7 110 21.0 23.1 91
White Mill 8700 22.8 21.2 108 21.4 20.6 104
Wolverine 7650 12.3 10.8 114 11.4 11.0 104
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Basin Index (%) 108 105
WIND RIVER
Burroughs Creek 8750 9.5 -M * 9.6 -M *
Castle Creek 8400 5.5 6.8 81 5.9 7.6 78
Cold Springs 9630 7.3 6.4 114 8.7 7.6 114
Deer Park 9700 -M 11.8 * 21.9 14.9 147
Hobbs Park 10100 13.9 11.6 120 13.0 10.4 125
Kirwin 9550 8.9 9.3 96 11.0 10.0 110
Little Warm 9370 9.2 8.9 103 10.4 10.6 98
South Pass 9040 17.4 12.7 137 16.4 12.7 129
St. Lawrence Alt 8620 6.5 -M * 8.8 -M *
Togwotee Pass 9580 19.8 20.9 95 18.3 22.2 82
Townsend Creek 8700 10.5 7.8 135 11.4 8.9 128
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Basin Index (%) 110 112
BIGHORN BASIN
Bald Mtn. 9380 16.1 16.1 100 13.1 13.8 95
Bear Trap Meadow 8200 8.0 5.6 143 8.1 7.0 116
Bone Springs Div 9350 13.2 13.8 96 10.6 13.0 82
Grave Springs 8550 8.8 7.4 119 9.3 8.0 116
Kirwin 9550 8.9 9.3 96 11.0 10.0 110
Marquette 8760 6.3 6.0 105 6.9 7.2 96
Middle Powder 7760 9.9 9.0 110 8.5 8.6 99
Owl Creek 8975 6.2 4.6 135 6.7 5.0 134
Powder River Pass 9480 10.0 9.5 105 12.1 10.6 114
Shell Creek 9580 11.9 12.8 93 12.3 11.7 105
Timber Creek 7950 4.6 4.4 105 5.2 6.3 83
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Basin Index (%) 105 103
SHOSHONE RIVER
Blackwater 9780 18.7 20.2 93 18.9 19.0 99
Evening Star 9200 24.1 23.1 104 25.8 25.4 102
Marquette 8760 6.3 6.0 105 6.9 7.2 96
Sylvan Lake 8420 18.2 17.6 103 20.7 20.2 102
Sylvan Road 7120 10.3 10.7 96 13.9 14.9 93
Younts Peak 8350 15.0 13.2 114 12.0 13.0 92
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Basin Index (%) 102 98
POWDER RIVER
Bear Trap Meadow 8200 8.0 5.6 143 8.1 7.0 116
Cloud Peak Reservoir 9860 12.5 12.4 101 12.2 11.0 111
Grave Springs 8550 8.8 7.4 119 9.3 8.0 116
Hansen Sawmill 8360 7.4 5.8 128 7.6 7.2 106
Middle Powder 7760 9.9 9.0 110 8.5 8.6 99
Powder River Pass 9480 10.0 9.5 105 12.1 10.6 114
Soldier Park 8720 7.2 5.9 122 6.8 7.9 86
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Basin Index (%) 115 107
TONGUE RIVER
Big Goose 7990 8.8 7.0 126 9.4 8.5 111
Bone Springs Div 9350 13.2 13.8 96 10.6 13.0 82
Burgess Junction 7880 11.0 9.2 120 12.3 10.0 123
Dome Lake 8880 9.9 9.8 101 10.2 10.4 98
Little Goose 8870 9.5 8.1 117 10.4 9.8 106
Sucker Creek 8880 12.0 10.6 113 14.4 11.8 122
Tie Creek 6870 8.1 4.8 169 11.4 9.0 127
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Basin Index (%) 115 109
BELLE FOURCHE
Blind Park 6890 8.0 7.1 113 9.8 9.4 104
Cole Canyon 5910 7.7 5.0 154 9.1 7.5 121
North Rapid Creek 6130 7.2 6.4 112 7.8 7.8 100
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Basin Index (%) 124 108
CHEYENNE RIVER BASIN
Blind Park 6890 8.0 7.1 113 9.8 9.4 104
North Rapid Creek 6130 7.2 6.4 112 7.8 7.8 100
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Basin Index (%) 113 102
UPPER N. PLATTE
Arapaho Ridge 10976 21.8 18.7 117 20.9 18.9 111
Blackhall Mtn 9839 34.2 24.9 137 33.6 24.2 139
Cinnabar Park 9707 -M 18.4 * 21.2 21.0 101
Columbine 9167 25.5 20.8 123 23.4 21.0 111
Divide Peak 8730 25.8 17.0 152 26.1 18.2 143
Joe Wright 10158 20.8 18.0 116 22.8 22.3 102
Laprele Creek 8390 10.7 8.4 127 11.2 9.8 114
Med Bow 10512 35.9 -M * 30.8 -M *
Never Summer 10323 21.9 17.2 127 15.6 14.5 108
North French Creek 10153 27.5 24.1 114 26.7 22.3 120
Old Battle 9860 36.8 26.0 142 30.8 28.6 108
Rawah 9069 13.2 9.4 140 14.6 13.2 111
Sage Creek Basin 7850 23.4 12.3 190 19.2 11.2 171
Sand Lake 10098 -M 22.5 * -M 20.5 *
South Brush Creek 8495 14.3 10.2 140 13.2 11.6 114
Tower 10620 45.0 38.0 118 39.0 34.9 112
Webber Springs 9260 27.0 19.1 141 28.8 21.6 133
Whiskey Park 9020 35.8 24.0 149 31.9 24.0 133
Willow Creek Pass 9523 14.9 11.2 133 14.8 11.7 126
Zirkel 9338 29.3 25.2 116 30.8 26.6 116
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Basin Index (%) 132 119
SWEETWATER
Deer Park 9700 -M 11.8 * 21.9 14.9 147
Larsen Creek 9000 10.4 10.3 101 13.2 11.3 117
South Pass 9040 17.4 12.7 137 16.4 12.7 129
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Basin Index (%) 121 132
LOWER N. PLATTE
Casper Mtn. 7920 12.1 11.0 110 11.9 11.2 106
Laprele Creek 8390 10.7 8.4 127 11.2 9.8 114
Reno Hill 8430 13.3 11.6 115 14.6 11.9 123
Windy Peak 7915 10.0 6.8 147 10.6 8.1 131
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Basin Index (%) 122 118
LARAMIE RIVER
Brooklyn Lake 10250 23.0 17.5 131 23.1 18.2 127
Cinnabar Park 9707 -M 18.4 * 21.2 21.0 101
Crow Creek 8335 4.9 6.3 78 7.7 9.2 84
Deadman Hill 10239 16.9 14.6 116 15.6 14.8 105
Rawah 9069 13.2 9.4 140 14.6 13.2 111
Roach 9740 16.4 13.4 122 18.5 15.7 118
Windy Peak 7915 10.0 6.8 147 10.6 8.1 131
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Basin Index (%) 124 111
S. PLATTE
Crow Creek 8335 4.9 6.3 78 7.7 9.2 84
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Basin Index (%) 78 84
LITTLE SNAKE RIVER
Battle Mountain 7498 16.4 10.7 153 20.4 13.0 157
Divide Peak 8730 25.8 17.0 152 26.1 18.2 143
Elk River 8739 26.0 16.5 158 24.1 16.2 149
Elkhead Divide 8800 28.8 -M * 26.3 -M *
Little Snake River 8928 35.0 23.6 148 36.9 27.7 133
Old Battle 9860 36.8 26.0 142 30.8 28.6 108
Sage Creek Basin 7850 23.4 12.3 190 19.2 11.2 171
Sandstone RS 8152 22.0 11.2 196 22.6 15.8 143
Whiskey Park 9020 35.8 24.0 149 31.9 24.0 133
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Basin Index (%) 157 137
UPPER GREEN RIVER
Big Sandy Opening 9080 13.6 11.6 117 13.7 11.0 125
Blind Bull Sum 8650 22.2 21.6 103 15.4 16.2 95
East Rim Divide 7930 10.7 10.0 107 10.2 10.1 101
Elkhart Park G.S. 9400 10.7 10.9 98 10.1 11.0 92
Gros Ventre Summit 8750 11.0 11.0 100 9.8 10.7 92
Gunsight Pass 9820 11.8 11.8 100 11.1 12.4 90
Indian Creek 9425 24.6 20.4 121 21.1 17.2 123
Kendall R.S. 7740 11.3 11.0 103 11.5 12.0 96
Larsen Creek 9000 10.4 10.3 101 13.2 11.3 117
Loomis Park 8240 14.3 13.5 106 14.4 14.9 97
New Fork Lake 8340 10.0 9.6 104 -M 9.4 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 13.1 11.8 111 13.9 12.5 111
Spring Creek Divide 9000 24.1 21.7 111 -M 21.1 *
Triple Peak 8500 21.9 21.5 102 22.4 23.1 97
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Basin Index (%) 107 103
LOWER GREEN RIVER
Blacks Fork Jct 8869 12.1 7.6 159 12.7 10.5 121
Buck Pasture 9632 18.1 -M * 19.1 -M *
EF Blacks Fork GS 9360 12.8 10.2 125 10.0 9.6 104
Hams Fork 7840 14.1 10.0 141 12.6 9.4 134
Henrys Fork 10182 -M -M * 13.3 -M *
Hewinta 9500 11.5 9.0 128 14.2 11.2 127
Hickerson Park 9122 9.4 6.8 138 10.0 8.7 115
Hole-in-Rock 9168 8.4 6.3 133 9.6 8.4 114
Indian Creek 9425 24.6 20.4 121 21.1 17.2 123
Kelley R.S. 8180 18.3 13.0 141 18.7 14.3 131
Spirit Lk 10235 -M 10.4 * 17.0 14.3 119
Steel Creek Park 10158 17.6 12.6 140 17.2 13.0 132
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Basin Index (%) 134 123
UPPER BEAR RIVER
Bear River RS 8777 13.0 8.3 157 14.2 10.0 142
Bug Lake 7987 25.6 16.4 156 21.0 15.4 136
Burts Miller Ranch 8000 9.2 4.9 188 12.5 6.5 192
Chalk Creek #1 9171 28.0 19.8 141 26.8 20.4 131
Giveout 6930 13.3 8.4 158 13.7 10.4 132
Hayden Fork 9130 19.6 13.2 148 23.8 17.4 137
Kelley R.S. 8180 18.3 13.0 141 18.7 14.3 131
Lily Lake 9133 14.0 11.4 123 15.4 13.6 113
Monte Cristo 8932 34.4 23.4 147 -M 21.9 *
Salt River Summit 7640 17.3 12.0 144 16.7 13.7 122
Spring Creek Divide 9000 24.1 21.7 111 -M 21.1 *
Trial Lake 9992 31.7 19.6 162 29.6 19.4 153
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Basin Index (%) 144 136
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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.
