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 24 , 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 17.0 15.9 107 18.4 18.9 97
Blind Bull Sum 8650 23.6 22.4 105 16.5 16.8 98
Cottonwood Creek 7670 22.9 20.6 111 23.4 23.3 100
East Rim Divide 7930 11.6 10.2 114 11.1 10.4 107
Grand Targhee 9260 40.6 38.1 107 22.7 28.6 79
Granite Creek 6770 -M 15.6 * -M 17.0 *
Grassy Lake 7265 32.4 30.6 106 35.1 32.5 108
Gros Ventre Summit 8750 11.5 11.6 99 10.3 11.2 92
Gunsight Pass 9820 -M 12.1 * -M 12.7 *
Lewis Lake Divide 7850 34.0 29.0 117 -M 30.4 *
Loomis Park 8240 15.4 14.4 107 15.5 15.6 99
Phillips Bench 8200 28.2 23.8 118 25.8 25.1 103
Salt River Summit 7640 18.2 12.6 144 17.4 14.2 123
Snake River Station 6920 19.0 16.6 114 21.4 20.1 106
Somsen Ranch 6800 18.7 11.6 161 19.9 15.0 133
Spring Creek Divide 9000 25.1 23.0 109 18.2 22.1 82
Thumb Divide 7980 19.2 14.9 129 17.8 15.8 113
Togwotee Pass 9580 20.7 21.9 95 18.9 22.6 84
Triple Peak 8500 23.0 22.1 104 23.5 23.8 99
Two Ocean Plateau 9240 29.1 26.8 109 -M 24.0 *
Willow Creek 8080 33.9 27.5 123 32.5 30.2 108
Younts Peak 8350 15.6 13.8 113 12.7 13.5 94
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Basin Index (%) 113 100
MADISON HEADWATERS IN WYOMING
Black Bear 8170 41.4 36.2 114 38.3 33.4 115
Canyon 7870 13.4 -M * 15.8 -M *
Madison Plateau 7750 28.0 20.8 135 26.9 22.4 120
West Yellowstone 6700 15.8 10.2 155 18.2 13.1 139
Whiskey Creek 6800 20.0 14.4 139 24.3 18.1 134
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Basin Index (%) 129 124
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 17.2 20.4 84 16.0 18.7 86
Canyon 7870 13.4 -M * 15.8 -M *
Evening Star 9200 24.6 23.7 104 26.4 26.2 101
Fisher Creek 9100 32.4 30.2 107 32.9 30.0 110
Monument Peak 8850 20.2 19.1 106 22.5 19.4 116
Northeast Entrance 7350 9.7 9.7 100 11.8 12.1 98
Parker Peak 9400 21.7 19.6 111 21.2 18.6 114
Sylvan Lake 8420 18.7 18.6 101 21.7 21.1 103
Thumb Divide 7980 19.2 14.9 129 17.8 15.8 113
Two Ocean Plateau 9240 29.1 26.8 109 -M 24.0 *
White Mill 8700 23.2 21.8 106 22.0 21.2 104
Wolverine 7650 12.5 10.8 116 11.8 11.4 104
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Basin Index (%) 106 105
WIND RIVER
Burroughs Creek 8750 10.3 -M * 10.0 -M *
Castle Creek 8400 5.6 7.0 80 6.2 7.8 79
Cold Springs 9630 7.5 6.8 110 8.8 8.2 107
Deer Park 9700 22.1 13.1 169 22.4 16.3 137
Hobbs Park 10100 14.1 12.8 110 13.2 11.1 119
Kirwin 9550 9.2 9.8 94 11.4 10.4 110
Little Warm 9370 9.7 9.2 105 11.0 11.2 98
South Pass 9040 17.8 13.6 131 17.4 14.0 124
St. Lawrence Alt 8620 6.8 -M * 9.0 -M *
Togwotee Pass 9580 20.7 21.9 95 18.9 22.6 84
Townsend Creek 8700 10.5 8.2 128 11.5 9.2 125
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Basin Index (%) 114 109
BIGHORN BASIN
Bald Mtn. 9380 17.2 16.8 102 14.0 14.7 95
Bear Trap Meadow 8200 8.5 6.0 142 8.5 7.4 115
Bone Springs Div 9350 14.1 15.0 94 11.3 13.6 83
Grave Springs 8550 9.2 8.0 115 9.6 8.6 112
Kirwin 9550 9.2 9.8 94 11.4 10.4 110
Marquette 8760 6.5 6.5 100 7.2 8.0 90
Middle Powder 7760 10.7 9.7 110 9.1 9.0 101
Owl Creek 8975 6.4 5.0 128 6.9 5.3 130
Powder River Pass 9480 10.3 10.0 103 12.4 11.4 109
Shell Creek 9580 12.9 13.8 93 13.1 12.3 107
Timber Creek 7950 4.9 4.0 122 5.5 6.6 83
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Basin Index (%) 105 102
SHOSHONE RIVER
Blackwater 9780 19.2 20.8 92 19.4 20.2 96
Evening Star 9200 24.6 23.7 104 26.4 26.2 101
Marquette 8760 6.5 6.5 100 7.2 8.0 90
Sylvan Lake 8420 18.7 18.6 101 21.7 21.1 103
Sylvan Road 7120 10.5 11.4 92 14.1 15.1 93
Younts Peak 8350 15.6 13.8 113 12.7 13.5 94
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Basin Index (%) 100 98
POWDER RIVER
Bear Trap Meadow 8200 8.5 6.0 142 8.5 7.4 115
Cloud Peak Reservoir 9860 12.9 13.5 96 12.4 11.8 105
Grave Springs 8550 9.2 8.0 115 9.6 8.6 112
Hansen Sawmill 8360 7.5 6.0 125 7.7 7.8 99
Middle Powder 7760 10.7 9.7 110 9.1 9.0 101
Powder River Pass 9480 10.3 10.0 103 12.4 11.4 109
Soldier Park 8720 7.4 6.1 121 7.0 8.0 88
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Basin Index (%) 112 104
TONGUE RIVER
Big Goose 7990 8.9 7.4 120 9.5 8.8 108
Bone Springs Div 9350 14.1 15.0 94 11.3 13.6 83
Burgess Junction 7880 11.6 9.6 121 12.9 10.4 124
Dome Lake 8880 10.4 10.6 98 10.4 11.2 93
Little Goose 8870 9.7 8.4 115 10.5 10.4 101
Sucker Creek 8880 12.6 11.1 114 15.1 12.4 122
Tie Creek 6870 -M 4.6 * 11.9 9.4 127
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Basin Index (%) 108 107
BELLE FOURCHE
Blind Park 6890 8.9 7.0 127 10.4 9.9 105
Cole Canyon 5910 8.3 5.1 163 9.6 7.8 123
North Rapid Creek 6130 7.5 6.6 114 8.3 8.1 102
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Basin Index (%) 132 110
CHEYENNE RIVER BASIN
Blind Park 6890 8.9 7.0 127 10.4 9.9 105
North Rapid Creek 6130 7.5 6.6 114 8.3 8.1 102
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Basin Index (%) 121 104
UPPER N. PLATTE
Arapaho Ridge 10976 24.3 19.8 123 23.2 19.4 120
Blackhall Mtn 9839 36.7 27.9 132 35.7 26.9 133
Cinnabar Park 9707 -M 19.2 * 22.2 21.5 103
Columbine 9167 27.7 21.7 128 24.7 22.1 112
Divide Peak 8730 27.1 18.2 149 26.5 20.0 132
Joe Wright 10158 23.7 18.5 128 25.4 23.8 107
Laprele Creek 8390 11.4 8.8 130 11.8 10.6 111
Med Bow 10512 38.0 -M * 31.1 -M *
Never Summer 10323 24.3 18.4 132 17.3 15.3 113
North French Creek 10153 29.2 26.1 112 28.0 24.1 116
Old Battle 9860 39.7 27.5 144 -M 30.6 *
Rawah 9069 14.8 10.0 148 16.0 14.0 114
Sage Creek Basin 7850 24.4 12.2 200 19.8 11.8 168
Sand Lake 10098 -M 24.4 * -M 22.6 *
South Brush Creek 8495 15.3 11.2 137 14.0 12.4 113
Tower 10620 48.6 39.0 125 39.4 36.6 108
Webber Springs 9260 29.0 20.6 141 30.6 23.2 132
Whiskey Park 9020 37.8 24.7 153 33.7 25.3 133
Willow Creek Pass 9523 17.1 12.0 142 16.6 12.4 134
Zirkel 9338 31.6 26.2 121 32.1 28.2 114
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Basin Index (%) 135 120
SWEETWATER
Deer Park 9700 22.1 13.1 169 22.4 16.3 137
Larsen Creek 9000 10.9 10.6 103 13.7 11.9 115
South Pass 9040 17.8 13.6 131 17.4 14.0 124
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Basin Index (%) 136 127
LOWER N. PLATTE
Casper Mtn. 7920 12.8 12.0 107 12.5 12.2 102
Laprele Creek 8390 11.4 8.8 130 11.8 10.6 111
Reno Hill 8430 14.1 12.6 112 15.2 12.6 121
Windy Peak 7915 10.5 7.6 138 11.1 8.8 126
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Basin Index (%) 119 114
LARAMIE RIVER
Brooklyn Lake 10250 24.1 19.8 122 24.0 19.6 122
Cinnabar Park 9707 -M 19.2 * 22.2 21.5 103
Crow Creek 8335 5.4 6.4 84 8.3 9.5 87
Deadman Hill 10239 18.4 15.2 121 17.0 15.8 108
Rawah 9069 14.8 10.0 148 16.0 14.0 114
Roach 9740 17.9 14.2 126 20.0 16.6 120
Windy Peak 7915 10.5 7.6 138 11.1 8.8 126
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Basin Index (%) 124 112
S. PLATTE
Crow Creek 8335 5.4 6.4 84 8.3 9.5 87
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Basin Index (%) 84 87
LITTLE SNAKE RIVER
Battle Mountain 7498 17.8 11.1 160 21.4 13.7 156
Divide Peak 8730 27.1 18.2 149 26.5 20.0 132
Elk River 8739 28.2 16.8 168 24.7 17.4 142
Elkhead Divide 8800 31.6 -M * -M -M *
Little Snake River 8928 37.7 24.6 153 37.2 29.2 127
Old Battle 9860 39.7 27.5 144 -M 30.6 *
Sage Creek Basin 7850 24.4 12.2 200 19.8 11.8 168
Sandstone RS 8152 -M 11.7 * 24.2 16.5 147
Whiskey Park 9020 37.8 24.7 153 33.7 25.3 133
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Basin Index (%) 157 140
UPPER GREEN RIVER
Big Sandy Opening 9080 14.2 12.2 116 14.3 11.9 120
Blind Bull Sum 8650 23.6 22.4 105 16.5 16.8 98
East Rim Divide 7930 11.6 10.2 114 11.1 10.4 107
Elkhart Park G.S. 9400 11.4 11.6 98 10.9 11.7 93
Gros Ventre Summit 8750 11.5 11.6 99 10.3 11.2 92
Gunsight Pass 9820 -M 12.1 * -M 12.7 *
Indian Creek 9425 25.8 20.7 125 21.9 18.0 122
Kendall R.S. 7740 12.1 11.4 106 12.3 12.4 99
Larsen Creek 9000 10.9 10.6 103 13.7 11.9 115
Loomis Park 8240 15.4 14.4 107 15.5 15.6 99
New Fork Lake 8340 10.6 10.0 106 -M 9.8 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 13.8 12.2 113 14.5 12.8 113
Spring Creek Divide 9000 25.1 23.0 109 18.2 22.1 82
Triple Peak 8500 23.0 22.1 104 23.5 23.8 99
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Basin Index (%) 109 102
LOWER GREEN RIVER
Blacks Fork Jct 8869 12.6 7.8 162 13.2 11.2 118
Buck Pasture 9632 18.7 -M * 19.7 -M *
EF Blacks Fork GS 9360 13.2 11.0 120 10.3 10.0 103
Hams Fork 7840 14.5 10.6 137 13.1 9.8 134
Henrys Fork 10182 -M -M * 13.7 -M *
Hewinta 9500 12.2 9.4 130 14.7 12.0 122
Hickerson Park 9122 9.6 7.0 137 10.2 9.1 112
Hole-in-Rock 9168 8.5 7.0 121 9.7 8.9 109
Indian Creek 9425 25.8 20.7 125 21.9 18.0 122
Kelley R.S. 8180 19.0 13.8 138 19.4 14.7 132
Spirit Lk 10235 19.0 11.5 165 17.8 15.6 114
Steel Creek Park 10158 17.9 13.4 134 17.6 14.0 126
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Basin Index (%) 136 120
UPPER BEAR RIVER
Bear River RS 8777 13.5 8.4 161 14.5 10.8 134
Bug Lake 7987 26.7 17.1 156 22.0 16.0 138
Burts Miller Ranch 8000 9.3 5.4 172 12.8 6.8 188
Chalk Creek #1 9171 29.4 21.0 140 27.8 21.0 132
Giveout 6930 14.3 7.8 183 14.3 10.7 134
Hayden Fork 9130 20.9 13.6 154 24.8 18.3 136
Kelley R.S. 8180 19.0 13.8 138 19.4 14.7 132
Lily Lake 9133 15.2 11.6 131 15.9 13.9 114
Monte Cristo 8932 36.8 24.6 150 33.7 22.8 148
Salt River Summit 7640 18.2 12.6 144 17.4 14.2 123
Spring Creek Divide 9000 25.1 23.0 109 18.2 22.1 82
Trial Lake 9992 33.2 20.4 163 31.7 20.1 158
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Basin Index (%) 146 132
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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.
