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 SUNDAY: MARCH 26 , 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 17.9 16.2 110 19.2 19.2 100
Blind Bull Sum 8650 24.0 23.2 103 16.7 17.2 97
Cottonwood Creek 7670 23.9 20.8 115 -M 23.8 *
East Rim Divide 7930 11.9 10.2 117 11.2 10.6 106
Grand Targhee 9260 42.9 39.2 109 22.6 28.8 78
Granite Creek 6770 -M 15.5 * -M 17.0 *
Grassy Lake 7265 33.5 30.8 109 36.4 32.7 111
Gros Ventre Summit 8750 11.7 11.8 99 10.4 11.4 91
Gunsight Pass 9820 13.2 12.3 107 12.4 12.8 97
Lewis Lake Divide 7850 34.8 29.3 119 -M 30.9 *
Loomis Park 8240 15.8 15.0 105 15.9 16.0 99
Phillips Bench 8200 28.9 24.5 118 25.8 25.4 102
Salt River Summit 7640 18.6 13.0 143 17.6 14.8 119
Snake River Station 6920 19.3 16.6 116 21.7 20.4 106
Somsen Ranch 6800 19.5 11.8 165 20.4 15.2 134
Spring Creek Divide 9000 25.5 23.7 108 18.7 22.4 83
Thumb Divide 7980 19.7 15.2 130 18.1 16.4 110
Togwotee Pass 9580 21.5 22.5 96 19.6 23.3 84
Triple Peak 8500 23.3 22.2 105 23.7 24.3 98
Two Ocean Plateau 9240 29.7 27.4 108 21.0 24.4 86
Willow Creek 8080 35.2 27.9 126 33.6 30.5 110
Younts Peak 8350 15.8 13.8 114 12.8 13.6 94
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Basin Index (%) 114 100
MADISON HEADWATERS IN WYOMING
Black Bear 8170 43.0 35.6 121 39.6 34.2 116
Canyon 7870 13.9 -M * 16.2 -M *
Madison Plateau 7750 28.9 21.1 137 27.3 22.5 121
West Yellowstone 6700 16.2 10.0 162 18.7 13.2 142
Whiskey Creek 6800 20.4 14.5 141 24.6 18.2 135
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Basin Index (%) 134 125
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 18.0 20.8 87 16.6 19.0 87
Canyon 7870 13.9 -M * 16.2 -M *
Evening Star 9200 25.2 24.1 105 26.8 26.6 101
Fisher Creek 9100 32.8 30.8 106 33.2 30.5 109
Monument Peak 8850 21.0 19.2 109 23.4 19.8 118
Northeast Entrance 7350 9.9 9.6 103 12.0 12.4 97
Parker Peak 9400 22.5 19.7 114 21.8 18.7 117
Sylvan Lake 8420 19.6 18.6 105 22.1 21.2 104
Thumb Divide 7980 19.7 15.2 130 18.1 16.4 110
Two Ocean Plateau 9240 29.7 27.4 108 21.0 24.4 86
White Mill 8700 23.6 22.4 105 22.3 21.6 103
Wolverine 7650 13.0 10.9 119 12.2 11.6 105
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Basin Index (%) 107 103
WIND RIVER
Burroughs Creek 8750 10.5 -M * 10.3 -M *
Castle Creek 8400 6.2 6.8 91 6.8 7.9 86
Cold Springs 9630 7.6 6.8 112 9.0 8.2 110
Deer Park 9700 22.6 13.4 169 22.8 16.4 139
Hobbs Park 10100 14.6 12.9 113 13.6 11.2 121
Kirwin 9550 9.8 10.0 98 11.9 10.7 111
Little Warm 9370 10.1 9.6 105 11.4 11.2 102
South Pass 9040 18.2 13.8 132 17.4 14.1 123
St. Lawrence Alt 8620 7.1 -M * 9.2 -M *
Togwotee Pass 9580 21.5 22.5 96 19.6 23.3 84
Townsend Creek 8700 10.8 8.2 132 11.7 9.5 123
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Basin Index (%) 117 110
BIGHORN BASIN
Bald Mtn. 9380 17.4 16.8 104 14.2 14.9 95
Bear Trap Meadow 8200 8.8 6.0 147 8.9 7.4 120
Bone Springs Div 9350 14.2 15.2 93 11.4 13.9 82
Grave Springs 8550 9.5 7.9 120 9.9 8.6 115
Kirwin 9550 9.8 10.0 98 11.9 10.7 111
Marquette 8760 7.8 6.6 118 8.5 8.1 105
Middle Powder 7760 10.8 9.8 110 9.2 9.1 101
Owl Creek 8975 7.1 5.0 142 7.6 5.4 141
Powder River Pass 9480 10.7 10.2 105 12.9 11.6 111
Shell Creek 9580 13.0 14.1 92 13.3 12.9 103
Timber Creek 7950 5.9 4.0 148 6.5 6.6 98
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Basin Index (%) 109 105
SHOSHONE RIVER
Blackwater 9780 19.8 21.0 94 20.0 20.5 98
Evening Star 9200 25.2 24.1 105 26.8 26.6 101
Marquette 8760 7.8 6.6 118 8.5 8.1 105
Sylvan Lake 8420 19.6 18.6 105 22.1 21.2 104
Sylvan Road 7120 10.7 11.3 95 14.3 15.2 94
Younts Peak 8350 15.8 13.8 114 12.8 13.6 94
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Basin Index (%) 104 99
POWDER RIVER
Bear Trap Meadow 8200 8.8 6.0 147 8.9 7.4 120
Cloud Peak Reservoir 9860 13.9 13.6 102 13.5 12.0 112
Grave Springs 8550 9.5 7.9 120 9.9 8.6 115
Hansen Sawmill 8360 8.2 6.0 137 8.4 7.8 108
Middle Powder 7760 10.8 9.8 110 9.2 9.1 101
Powder River Pass 9480 10.7 10.2 105 12.9 11.6 111
Soldier Park 8720 8.4 6.4 131 7.8 8.2 95
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Basin Index (%) 117 109
TONGUE RIVER
Big Goose 7990 9.3 7.4 126 9.9 9.0 110
Bone Springs Div 9350 14.2 15.2 93 11.4 13.9 82
Burgess Junction 7880 11.7 9.8 119 13.0 10.5 124
Dome Lake 8880 10.6 10.6 100 10.8 11.4 95
Little Goose 8870 10.2 8.6 119 11.0 10.7 103
Sucker Creek 8880 12.9 11.1 116 15.3 12.4 123
Tie Creek 6870 8.8 4.6 191 12.1 9.4 129
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Basin Index (%) 115 108
BELLE FOURCHE
Blind Park 6890 8.9 7.0 127 10.6 9.9 107
Cole Canyon 5910 8.4 5.0 168 9.5 8.0 119
North Rapid Creek 6130 7.6 6.6 115 8.3 8.2 101
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Basin Index (%) 134 109
CHEYENNE RIVER BASIN
Blind Park 6890 8.9 7.0 127 10.6 9.9 107
North Rapid Creek 6130 7.6 6.6 115 8.3 8.2 101
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Basin Index (%) 121 104
UPPER N. PLATTE
Arapaho Ridge 10976 24.6 20.2 122 23.5 19.8 119
Blackhall Mtn 9839 37.0 28.6 129 35.8 27.6 130
Cinnabar Park 9707 -M 19.4 * 22.2 22.0 101
Columbine 9167 27.9 21.5 130 24.5 22.2 110
Divide Peak 8730 27.7 18.2 152 27.7 20.2 137
Joe Wright 10158 24.0 18.8 128 25.8 24.2 107
Laprele Creek 8390 11.5 9.0 128 11.9 10.7 111
Med Bow 10512 38.2 -M * 31.1 -M *
Never Summer 10323 24.7 18.8 131 17.5 15.8 111
North French Creek 10153 29.3 26.2 112 28.2 24.2 117
Old Battle 9860 40.0 28.0 143 30.9 31.0 100
Rawah 9069 14.8 10.2 145 16.3 14.2 115
Sage Creek Basin 7850 25.1 12.3 204 20.1 11.8 170
Sand Lake 10098 27.2 24.7 110 25.8 22.8 113
South Brush Creek 8495 15.4 11.3 136 14.0 12.6 111
Tower 10620 49.4 39.9 124 -M 36.6 *
Webber Springs 9260 29.3 20.8 141 30.6 23.8 129
Whiskey Park 9020 38.4 24.8 155 34.1 25.6 133
Willow Creek Pass 9523 17.2 12.0 143 16.6 12.8 130
Zirkel 9338 31.8 26.7 119 33.0 28.6 115
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Basin Index (%) 133 119
SWEETWATER
Deer Park 9700 22.6 13.4 169 22.8 16.4 139
Larsen Creek 9000 11.3 10.4 109 13.9 12.2 114
South Pass 9040 18.2 13.8 132 17.4 14.1 123
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Basin Index (%) 139 127
LOWER N. PLATTE
Casper Mtn. 7920 12.8 12.3 104 12.5 12.6 99
Laprele Creek 8390 11.5 9.0 128 11.9 10.7 111
Reno Hill 8430 14.0 12.6 111 15.2 12.7 120
Windy Peak 7915 10.4 7.6 137 11.1 9.0 123
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Basin Index (%) 117 113
LARAMIE RIVER
Brooklyn Lake 10250 24.1 19.8 122 24.0 19.8 121
Cinnabar Park 9707 -M 19.4 * 22.2 22.0 101
Crow Creek 8335 5.1 6.1 84 8.3 9.9 84
Deadman Hill 10239 18.4 15.4 119 17.0 16.1 106
Rawah 9069 14.8 10.2 145 16.3 14.2 115
Roach 9740 17.9 14.3 125 19.9 17.0 117
Windy Peak 7915 10.4 7.6 137 11.1 9.0 123
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Basin Index (%) 124 110
S. PLATTE
Crow Creek 8335 5.1 6.1 84 8.3 9.9 84
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Basin Index (%) 84 84
LITTLE SNAKE RIVER
Battle Mountain 7498 17.9 10.9 164 21.6 13.8 157
Divide Peak 8730 27.7 18.2 152 27.7 20.2 137
Elk River 8739 28.7 17.0 169 25.3 17.5 145
Elkhead Divide 8800 32.0 -M * -M -M *
Little Snake River 8928 38.2 24.8 154 37.2 29.9 124
Old Battle 9860 40.0 28.0 143 30.9 31.0 100
Sage Creek Basin 7850 25.1 12.3 204 20.1 11.8 170
Sandstone RS 8152 -M 12.0 * 24.4 16.6 147
Whiskey Park 9020 38.4 24.8 155 34.1 25.6 133
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Basin Index (%) 159 133
UPPER GREEN RIVER
Big Sandy Opening 9080 14.4 12.6 114 14.6 12.0 122
Blind Bull Sum 8650 24.0 23.2 103 16.7 17.2 97
East Rim Divide 7930 11.9 10.2 117 11.2 10.6 106
Elkhart Park G.S. 9400 11.7 11.9 98 11.0 11.8 93
Gros Ventre Summit 8750 11.7 11.8 99 10.4 11.4 91
Gunsight Pass 9820 13.2 12.3 107 12.4 12.8 97
Indian Creek 9425 26.5 22.0 120 22.3 18.2 123
Kendall R.S. 7740 12.3 11.2 110 12.4 12.6 98
Larsen Creek 9000 11.3 10.4 109 13.9 12.2 114
Loomis Park 8240 15.8 15.0 105 15.9 16.0 99
New Fork Lake 8340 10.8 10.0 108 -M 9.9 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 14.0 12.3 114 14.7 13.0 113
Spring Creek Divide 9000 25.5 23.7 108 18.7 22.4 83
Triple Peak 8500 23.3 22.2 105 23.7 24.3 98
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Basin Index (%) 108 102
LOWER GREEN RIVER
Blacks Fork Jct 8869 12.7 8.0 159 13.4 11.4 118
Buck Pasture 9632 19.1 -M * 19.9 -M *
EF Blacks Fork GS 9360 13.2 11.0 120 10.2 10.0 102
Hams Fork 7840 14.9 10.6 141 13.4 10.2 131
Henrys Fork 10182 -M -M * 15.7 -M *
Hewinta 9500 12.3 9.4 131 14.6 12.1 121
Hickerson Park 9122 9.8 7.0 140 10.4 9.2 113
Hole-in-Rock 9168 8.7 7.0 124 9.8 9.0 109
Indian Creek 9425 26.5 22.0 120 22.3 18.2 123
Kelley R.S. 8180 19.4 14.2 137 19.7 15.0 131
Spirit Lk 10235 -M 11.6 * 18.2 15.6 117
Steel Creek Park 10158 18.3 13.6 135 18.0 14.6 123
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Basin Index (%) 132 120
UPPER BEAR RIVER
Bear River RS 8777 13.7 8.4 163 14.8 11.0 135
Bug Lake 7987 27.4 17.6 156 22.3 16.7 134
Burts Miller Ranch 8000 9.5 5.6 170 12.9 7.1 182
Chalk Creek #1 9171 30.7 21.4 143 26.8 21.0 128
Giveout 6930 14.7 8.0 184 14.7 10.8 136
Hayden Fork 9130 22.0 14.0 157 24.3 18.6 131
Kelley R.S. 8180 19.4 14.2 137 19.7 15.0 131
Lily Lake 9133 14.6 11.8 124 16.2 14.0 116
Monte Cristo 8932 37.9 25.2 150 -M 23.8 *
Salt River Summit 7640 18.6 13.0 143 17.6 14.8 119
Spring Creek Divide 9000 25.5 23.7 108 18.7 22.4 83
Trial Lake 9992 34.3 20.8 165 32.1 20.8 154
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Basin Index (%) 146 128
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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.