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 14 , 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 15.7 15.8 99 17.4 17.9 97
Blind Bull Sum 8650 21.5 21.0 102 14.7 16.1 91
Cottonwood Creek 7670 21.4 19.2 111 -M 21.5 *
East Rim Divide 7930 10.5 9.7 108 10.0 10.0 100
Grand Targhee 9260 37.7 35.0 108 22.3 27.0 83
Granite Creek 6770 15.0 15.2 99 13.0 16.6 78
Grassy Lake 7265 30.4 27.9 109 33.8 31.0 109
Gros Ventre Summit 8750 10.3 10.7 96 9.4 10.5 90
Gunsight Pass 9820 11.2 11.5 97 10.8 12.0 90
Lewis Lake Divide 7850 31.4 26.6 118 30.7 28.2 109
Loomis Park 8240 13.8 13.7 101 13.9 14.6 95
Phillips Bench 8200 25.8 22.4 115 25.3 23.4 108
Salt River Summit 7640 16.9 11.6 146 16.2 13.4 121
Snake River Station 6920 17.7 15.4 115 20.1 19.2 105
Somsen Ranch 6800 17.0 11.7 145 18.0 14.4 125
Spring Creek Divide 9000 23.3 21.1 110 16.6 20.8 80
Thumb Divide 7980 17.8 14.1 126 16.6 15.0 111
Togwotee Pass 9580 19.4 21.0 92 17.9 22.1 81
Triple Peak 8500 21.3 21.1 101 22.0 22.6 97
Two Ocean Plateau 9240 27.0 25.0 108 21.0 23.0 91
Willow Creek 8080 30.9 26.2 118 29.8 28.8 103
Younts Peak 8350 14.8 13.2 112 12.0 13.0 92
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Basin Index (%) 110 98
MADISON HEADWATERS IN WYOMING
Black Bear 8170 38.2 32.7 117 35.8 32.2 111
Canyon 7870 12.9 -M * 15.0 -M *
Madison Plateau 7750 25.4 19.4 131 25.1 21.6 116
West Yellowstone 6700 14.6 10.0 146 17.0 12.7 134
Whiskey Creek 6800 18.2 14.0 130 22.3 17.2 130
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Basin Index (%) 127 120
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 16.4 19.3 85 15.1 17.6 86
Canyon 7870 12.9 -M * 15.0 -M *
Evening Star 9200 23.3 22.8 102 25.1 24.8 101
Fisher Creek 9100 30.3 28.2 107 30.8 27.8 111
Monument Peak 8850 18.6 18.2 102 20.6 18.2 113
Northeast Entrance 7350 9.2 9.3 99 11.2 11.6 97
Parker Peak 9400 20.5 18.5 111 20.2 17.6 115
Sylvan Lake 8420 17.2 17.2 100 19.8 19.4 102
Thumb Divide 7980 17.8 14.1 126 16.6 15.0 111
Two Ocean Plateau 9240 27.0 25.0 108 21.0 23.0 91
White Mill 8700 22.0 21.0 105 20.8 20.4 102
Wolverine 7650 12.4 10.8 115 11.5 11.0 105
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Basin Index (%) 105 103
WIND RIVER
Burroughs Creek 8750 9.6 -M * 9.4 -M *
Castle Creek 8400 5.4 7.0 77 6.0 7.5 80
Cold Springs 9630 7.1 6.3 113 8.5 7.5 113
Deer Park 9700 20.6 11.6 178 20.9 14.6 143
Hobbs Park 10100 13.1 11.3 116 12.3 10.3 119
Kirwin 9550 8.8 9.2 96 10.9 10.0 109
Little Warm 9370 8.9 9.0 99 10.2 10.6 96
South Pass 9040 16.7 12.6 133 16.0 12.6 127
St. Lawrence Alt 8620 6.0 -M * 8.3 -M *
Togwotee Pass 9580 19.4 21.0 92 17.9 22.1 81
Townsend Creek 8700 10.0 7.6 132 11.0 8.8 125
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Basin Index (%) 115 109
BIGHORN BASIN
Bald Mtn. 9380 16.1 16.0 101 13.2 13.6 97
Bear Trap Meadow 8200 7.9 5.7 139 8.1 6.8 119
Bone Springs Div 9350 13.0 13.8 94 10.4 12.9 81
Grave Springs 8550 8.8 7.4 119 9.2 7.8 118
Kirwin 9550 8.8 9.2 96 10.9 10.0 109
Marquette 8760 6.4 5.8 110 7.0 7.2 97
Middle Powder 7760 9.7 8.8 110 8.5 8.4 101
Owl Creek 8975 6.0 4.6 130 6.6 5.0 132
Powder River Pass 9480 9.7 9.4 103 11.9 10.4 114
Shell Creek 9580 11.9 12.6 94 12.2 11.6 105
Timber Creek 7950 4.5 4.4 102 5.2 6.2 84
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Basin Index (%) 105 103
SHOSHONE RIVER
Blackwater 9780 18.0 19.6 92 18.4 18.6 99
Evening Star 9200 23.3 22.8 102 25.1 24.8 101
Marquette 8760 6.4 5.8 110 7.0 7.2 97
Sylvan Lake 8420 17.2 17.2 100 19.8 19.4 102
Sylvan Road 7120 9.8 10.4 94 13.3 14.6 91
Younts Peak 8350 14.8 13.2 112 12.0 13.0 92
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Basin Index (%) 101 98
POWDER RIVER
Bear Trap Meadow 8200 7.9 5.7 139 8.1 6.8 119
Cloud Peak Reservoir 9860 12.3 12.4 99 12.0 11.0 109
Grave Springs 8550 8.8 7.4 119 9.2 7.8 118
Hansen Sawmill 8360 7.3 5.8 126 7.5 7.1 106
Middle Powder 7760 9.7 8.8 110 8.5 8.4 101
Powder River Pass 9480 9.7 9.4 103 11.9 10.4 114
Soldier Park 8720 7.4 5.8 128 6.8 7.8 87
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Basin Index (%) 114 108
TONGUE RIVER
Big Goose 7990 8.7 6.8 128 9.1 8.4 108
Bone Springs Div 9350 13.0 13.8 94 10.4 12.9 81
Burgess Junction 7880 10.8 9.1 119 12.2 10.0 122
Dome Lake 8880 9.9 9.7 102 10.2 10.4 98
Little Goose 8870 9.3 8.2 113 10.1 9.8 103
Sucker Creek 8880 11.8 10.4 113 14.2 11.6 122
Tie Creek 6870 8.2 4.8 171 11.3 8.9 127
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Basin Index (%) 114 108
BELLE FOURCHE
Blind Park 6890 8.4 7.0 120 9.8 9.3 105
Cole Canyon 5910 8.0 5.0 160 9.3 7.4 126
North Rapid Creek 6130 7.3 6.4 114 7.9 7.6 104
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Basin Index (%) 129 111
CHEYENNE RIVER BASIN
Blind Park 6890 8.4 7.0 120 9.8 9.3 105
North Rapid Creek 6130 7.3 6.4 114 7.9 7.6 104
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Basin Index (%) 117 105
UPPER N. PLATTE
Arapaho Ridge 10976 21.1 18.3 115 20.2 18.5 109
Blackhall Mtn 9839 33.2 24.0 138 32.5 23.6 138
Cinnabar Park 9707 -M 18.4 * 21.0 20.8 101
Columbine 9167 25.0 20.7 121 22.9 20.8 110
Divide Peak 8730 24.8 17.0 146 25.5 18.2 140
Joe Wright 10158 20.5 18.0 114 22.5 22.3 101
Laprele Creek 8390 10.8 8.4 129 11.2 9.8 114
Med Bow 10512 35.2 -M * 30.4 -M *
Never Summer 10323 -M 17.2 * -M 14.5 *
North French Creek 10153 26.9 24.0 112 26.3 22.2 118
Old Battle 9860 35.3 26.0 136 30.6 28.4 108
Rawah 9069 12.5 9.6 130 14.0 13.2 106
Sage Creek Basin 7850 22.7 12.5 182 18.7 11.2 167
Sand Lake 10098 -M 22.4 * -M 20.5 *
South Brush Creek 8495 13.9 10.5 132 12.9 11.5 112
Tower 10620 43.9 37.8 116 38.8 34.4 113
Webber Springs 9260 25.8 18.8 137 27.7 21.4 129
Whiskey Park 9020 34.9 23.9 146 31.5 24.0 131
Willow Creek Pass 9523 14.4 11.0 131 14.3 11.6 123
Zirkel 9338 28.6 25.0 114 30.2 26.5 114
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Basin Index (%) 129 118
SWEETWATER
Deer Park 9700 20.6 11.6 178 20.9 14.6 143
Larsen Creek 9000 10.1 10.1 100 12.8 11.1 115
South Pass 9040 16.7 12.6 133 16.0 12.6 127
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Basin Index (%) 138 130
LOWER N. PLATTE
Casper Mtn. 7920 11.9 11.0 108 11.8 11.1 106
Laprele Creek 8390 10.8 8.4 129 11.2 9.8 114
Reno Hill 8430 13.3 11.4 117 14.5 11.9 122
Windy Peak 7915 10.1 6.7 151 10.7 8.1 132
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Basin Index (%) 123 118
LARAMIE RIVER
Brooklyn Lake 10250 22.6 17.4 130 22.7 18.2 125
Cinnabar Park 9707 -M 18.4 * 21.0 20.8 101
Crow Creek 8335 4.9 6.3 78 7.7 8.6 90
Deadman Hill 10239 16.8 14.3 117 15.5 14.5 107
Rawah 9069 12.5 9.6 130 14.0 13.2 106
Roach 9740 16.2 13.2 123 18.2 15.6 117
Windy Peak 7915 10.1 6.7 151 10.7 8.1 132
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Basin Index (%) 123 111
S. PLATTE
Crow Creek 8335 4.9 6.3 78 7.7 8.6 90
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Basin Index (%) 78 90
LITTLE SNAKE RIVER
Battle Mountain 7498 16.0 10.7 150 19.9 13.0 153
Divide Peak 8730 24.8 17.0 146 25.5 18.2 140
Elk River 8739 24.8 16.6 149 23.6 16.2 146
Elkhead Divide 8800 27.2 -M * 26.3 -M *
Little Snake River 8928 33.4 23.5 142 36.2 27.6 131
Old Battle 9860 35.3 26.0 136 30.6 28.4 108
Sage Creek Basin 7850 22.7 12.5 182 18.7 11.2 167
Sandstone RS 8152 21.2 11.6 183 22.0 15.8 139
Whiskey Park 9020 34.9 23.9 146 31.5 24.0 131
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Basin Index (%) 150 135
UPPER GREEN RIVER
Big Sandy Opening 9080 13.2 11.3 117 13.3 10.7 124
Blind Bull Sum 8650 21.5 21.0 102 14.7 16.1 91
East Rim Divide 7930 10.5 9.7 108 10.0 10.0 100
Elkhart Park G.S. 9400 10.5 10.5 100 9.8 10.8 91
Gros Ventre Summit 8750 10.3 10.7 96 9.4 10.5 90
Gunsight Pass 9820 11.2 11.5 97 10.8 12.0 90
Indian Creek 9425 23.9 20.2 118 20.5 17.2 119
Kendall R.S. 7740 10.9 10.8 101 11.1 11.8 94
Larsen Creek 9000 10.1 10.1 100 12.8 11.1 115
Loomis Park 8240 13.8 13.7 101 13.9 14.6 95
New Fork Lake 8340 9.8 9.3 105 -M 9.2 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 12.8 11.6 110 13.7 12.4 110
Spring Creek Divide 9000 23.3 21.1 110 16.6 20.8 80
Triple Peak 8500 21.3 21.1 101 22.0 22.6 97
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Basin Index (%) 105 99
LOWER GREEN RIVER
Blacks Fork Jct 8869 11.7 7.6 154 12.4 10.2 122
Buck Pasture 9632 17.4 -M * 18.4 -M *
EF Blacks Fork GS 9360 12.5 10.1 124 9.8 9.6 102
Hams Fork 7840 13.6 10.2 133 12.3 9.4 131
Henrys Fork 10182 -M -M * 12.8 -M *
Hewinta 9500 11.0 8.7 126 13.8 11.0 125
Hickerson Park 9122 9.2 6.8 135 9.8 8.6 114
Hole-in-Rock 9168 8.2 6.3 130 9.4 8.4 112
Indian Creek 9425 23.9 20.2 118 20.5 17.2 119
Kelley R.S. 8180 17.8 12.8 139 18.2 14.3 127
Spirit Lk 10235 17.3 9.8 177 16.3 14.3 114
Steel Creek Park 10158 17.1 12.5 137 16.8 13.0 129
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Basin Index (%) 136 120
UPPER BEAR RIVER
Bear River RS 8777 12.5 8.1 154 13.7 9.8 140
Bug Lake 7987 24.9 16.4 152 20.2 15.3 132
Burts Miller Ranch 8000 9.0 5.3 170 12.3 6.4 192
Chalk Creek #1 9171 27.0 19.7 137 25.9 20.2 128
Giveout 6930 13.1 8.2 160 13.3 10.2 130
Hayden Fork 9130 18.5 13.0 142 22.9 17.4 132
Kelley R.S. 8180 17.8 12.8 139 18.2 14.3 127
Lily Lake 9133 13.4 11.2 120 14.9 13.4 111
Monte Cristo 8932 33.2 23.0 144 -M 21.8 *
Salt River Summit 7640 16.9 11.6 146 16.2 13.4 121
Spring Creek Divide 9000 23.3 21.1 110 16.6 20.8 80
Trial Lake 9992 30.2 19.3 156 29.4 18.8 156
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Basin Index (%) 141 127
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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.
