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 23 , 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 16.8 16.0 105 18.3 18.9 97
Blind Bull Sum 8650 23.3 22.4 104 16.4 16.8 98
Cottonwood Creek 7670 22.7 20.4 111 22.6 23.0 98
East Rim Divide 7930 11.5 10.2 113 11.2 10.3 109
Grand Targhee 9260 40.0 37.8 106 -M 28.6 *
Granite Creek 6770 -M 15.7 * -M 17.0 *
Grassy Lake 7265 32.0 30.5 105 34.8 32.5 107
Gros Ventre Summit 8750 11.4 11.5 99 10.4 11.2 93
Gunsight Pass 9820 12.4 12.0 103 11.8 12.7 93
Lewis Lake Divide 7850 33.5 29.1 115 -M 30.0 *
Loomis Park 8240 15.3 14.0 109 15.5 15.6 99
Phillips Bench 8200 27.9 23.8 117 25.8 24.8 104
Salt River Summit 7640 18.0 12.4 145 17.3 14.1 123
Snake River Station 6920 18.8 16.7 113 20.4 20.0 102
Somsen Ranch 6800 18.6 11.6 160 19.7 14.9 132
Spring Creek Divide 9000 24.8 22.6 110 17.9 22.0 81
Thumb Divide 7980 19.0 14.8 128 17.8 15.6 114
Togwotee Pass 9580 20.5 21.6 95 18.7 22.6 83
Triple Peak 8500 22.9 21.9 105 23.5 23.6 100
Two Ocean Plateau 9240 28.9 26.6 109 -M 23.6 *
Willow Creek 8080 33.4 27.2 123 32.0 30.2 106
Younts Peak 8350 15.5 13.7 113 12.5 13.4 93
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Basin Index (%) 112 101
MADISON HEADWATERS IN WYOMING
Black Bear 8170 41.1 36.2 114 38.0 33.4 114
Canyon 7870 13.3 -M * 15.7 -M *
Madison Plateau 7750 27.8 20.8 134 26.8 22.4 120
West Yellowstone 6700 15.6 10.2 153 18.2 13.1 139
Whiskey Creek 6800 19.8 14.4 138 24.4 18.0 136
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Basin Index (%) 128 124
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 17.1 20.2 85 15.9 18.5 86
Canyon 7870 13.3 -M * 15.7 -M *
Evening Star 9200 24.4 23.7 103 26.3 26.2 100
Fisher Creek 9100 32.4 30.0 108 32.7 29.8 110
Monument Peak 8850 20.0 19.0 105 22.4 19.4 115
Northeast Entrance 7350 9.6 9.8 98 11.7 12.0 98
Parker Peak 9400 21.4 19.6 109 21.0 18.6 113
Sylvan Lake 8420 18.5 18.5 100 21.5 20.9 103
Thumb Divide 7980 19.0 14.8 128 17.8 15.6 114
Two Ocean Plateau 9240 28.9 26.6 109 -M 23.6 *
White Mill 8700 23.2 21.6 107 21.9 21.1 104
Wolverine 7650 12.3 10.7 115 11.6 11.4 102
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Basin Index (%) 106 105
WIND RIVER
Burroughs Creek 8750 10.2 -M * 10.0 -M *
Castle Creek 8400 5.6 7.0 80 6.3 7.8 81
Cold Springs 9630 7.5 6.6 114 8.8 8.1 109
Deer Park 9700 22.1 12.8 173 22.4 16.3 137
Hobbs Park 10100 14.1 12.4 114 13.1 11.1 118
Kirwin 9550 9.2 9.5 97 11.4 10.4 110
Little Warm 9370 9.6 9.2 104 10.8 11.0 98
South Pass 9040 17.8 13.5 132 17.3 13.8 125
St. Lawrence Alt 8620 6.7 -M * 8.9 -M *
Togwotee Pass 9580 20.5 21.6 95 18.7 22.6 83
Townsend Creek 8700 10.5 8.1 130 11.5 9.2 125
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Basin Index (%) 116 109
BIGHORN BASIN
Bald Mtn. 9380 17.1 16.5 104 13.9 14.7 95
Bear Trap Meadow 8200 8.5 5.9 144 8.5 7.2 118
Bone Springs Div 9350 13.9 14.8 94 11.1 13.6 82
Grave Springs 8550 9.2 7.8 118 9.6 8.5 113
Kirwin 9550 9.2 9.5 97 11.4 10.4 110
Marquette 8760 6.5 6.4 102 7.1 7.8 91
Middle Powder 7760 10.7 9.6 111 9.0 9.0 100
Owl Creek 8975 6.4 5.0 128 6.9 5.2 133
Powder River Pass 9480 10.3 9.9 104 12.5 11.4 110
Shell Creek 9580 12.8 13.8 93 13.0 12.2 107
Timber Creek 7950 4.9 4.0 122 5.5 6.6 83
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Basin Index (%) 106 102
SHOSHONE RIVER
Blackwater 9780 19.0 20.7 92 19.3 20.0 96
Evening Star 9200 24.4 23.7 103 26.3 26.2 100
Marquette 8760 6.5 6.4 102 7.1 7.8 91
Sylvan Lake 8420 18.5 18.5 100 21.5 20.9 103
Sylvan Road 7120 10.5 11.3 93 14.0 15.1 93
Younts Peak 8350 15.5 13.7 113 12.5 13.4 93
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Basin Index (%) 100 97
POWDER RIVER
Bear Trap Meadow 8200 8.5 5.9 144 8.5 7.2 118
Cloud Peak Reservoir 9860 12.8 13.4 96 12.4 11.8 105
Grave Springs 8550 9.2 7.8 118 9.6 8.5 113
Hansen Sawmill 8360 7.5 6.0 125 7.7 7.7 100
Middle Powder 7760 10.7 9.6 111 9.0 9.0 100
Powder River Pass 9480 10.3 9.9 104 12.5 11.4 110
Soldier Park 8720 7.3 6.0 122 7.0 8.0 88
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Basin Index (%) 113 105
TONGUE RIVER
Big Goose 7990 8.9 7.4 120 9.5 8.8 108
Bone Springs Div 9350 13.9 14.8 94 11.1 13.6 82
Burgess Junction 7880 11.5 9.6 120 12.8 10.4 123
Dome Lake 8880 10.3 10.4 99 10.4 11.2 93
Little Goose 8870 9.6 8.3 116 10.5 10.4 101
Sucker Creek 8880 12.6 11.2 112 15.0 12.4 121
Tie Creek 6870 -M 4.6 * 11.8 9.3 127
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Basin Index (%) 108 107
BELLE FOURCHE
Blind Park 6890 8.8 7.0 126 10.6 9.9 107
Cole Canyon 5910 8.2 5.1 161 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 (%) 131 110
CHEYENNE RIVER BASIN
Blind Park 6890 8.8 7.0 126 10.6 9.9 107
North Rapid Creek 6130 7.5 6.6 114 8.3 8.1 102
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Basin Index (%) 120 105
UPPER N. PLATTE
Arapaho Ridge 10976 23.9 19.6 122 22.9 19.2 119
Blackhall Mtn 9839 36.4 27.3 133 34.5 26.5 130
Cinnabar Park 9707 -M 18.3 * 22.1 21.0 105
Columbine 9167 27.2 21.3 128 24.5 21.8 112
Divide Peak 8730 26.8 17.7 151 26.5 19.4 137
Joe Wright 10158 23.4 18.5 126 25.2 23.6 107
Laprele Creek 8390 11.3 8.8 128 11.8 10.4 113
Med Bow 10512 37.7 -M * 31.1 -M *
Never Summer 10323 23.6 18.0 131 16.8 14.8 114
North French Creek 10153 28.8 25.3 114 27.8 23.6 118
Old Battle 9860 39.1 26.8 146 -M 30.2 *
Rawah 9069 14.8 9.8 151 15.9 14.0 114
Sage Creek Basin 7850 24.1 11.7 206 19.7 11.6 170
Sand Lake 10098 -M 24.0 * -M 22.1 *
South Brush Creek 8495 15.3 10.8 142 13.9 12.4 112
Tower 10620 47.8 38.8 123 39.0 36.2 108
Webber Springs 9260 28.7 20.3 141 30.3 23.0 132
Whiskey Park 9020 37.3 24.8 150 33.6 25.0 134
Willow Creek Pass 9523 16.8 12.0 140 16.4 12.2 134
Zirkel 9338 31.2 26.0 120 31.9 27.8 115
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Basin Index (%) 135 121
SWEETWATER
Deer Park 9700 22.1 12.8 173 22.4 16.3 137
Larsen Creek 9000 11.0 10.6 104 13.7 11.9 115
South Pass 9040 17.8 13.5 132 17.3 13.8 125
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Basin Index (%) 138 127
LOWER N. PLATTE
Casper Mtn. 7920 12.8 11.8 108 12.5 11.7 107
Laprele Creek 8390 11.3 8.8 128 11.8 10.4 113
Reno Hill 8430 14.0 12.2 115 15.2 12.4 123
Windy Peak 7915 10.5 7.0 150 11.1 8.6 129
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Basin Index (%) 122 117
LARAMIE RIVER
Brooklyn Lake 10250 24.0 19.0 126 24.0 19.2 125
Cinnabar Park 9707 -M 18.3 * 22.1 21.0 105
Crow Creek 8335 5.4 6.5 83 8.3 9.3 89
Deadman Hill 10239 18.2 15.2 120 16.9 15.7 108
Rawah 9069 14.8 9.8 151 15.9 14.0 114
Roach 9740 17.6 14.2 124 19.8 16.6 119
Windy Peak 7915 10.5 7.0 150 11.1 8.6 129
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Basin Index (%) 126 113
S. PLATTE
Crow Creek 8335 5.4 6.5 83 8.3 9.3 89
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Basin Index (%) 83 89
LITTLE SNAKE RIVER
Battle Mountain 7498 17.6 11.1 159 21.3 13.6 157
Divide Peak 8730 26.8 17.7 151 26.5 19.4 137
Elk River 8739 27.6 16.5 167 24.6 17.1 144
Elkhead Divide 8800 30.9 -M * -M -M *
Little Snake River 8928 37.3 24.6 152 37.1 28.6 130
Old Battle 9860 39.1 26.8 146 -M 30.2 *
Sage Creek Basin 7850 24.1 11.7 206 19.7 11.6 170
Sandstone RS 8152 24.0 11.7 205 24.0 16.5 145
Whiskey Park 9020 37.3 24.8 150 33.6 25.0 134
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Basin Index (%) 161 142
UPPER GREEN RIVER
Big Sandy Opening 9080 14.3 12.0 119 14.4 11.8 122
Blind Bull Sum 8650 23.3 22.4 104 16.4 16.8 98
East Rim Divide 7930 11.5 10.2 113 11.2 10.3 109
Elkhart Park G.S. 9400 11.4 11.3 101 10.8 11.6 93
Gros Ventre Summit 8750 11.4 11.5 99 10.4 11.2 93
Gunsight Pass 9820 12.4 12.0 103 11.8 12.7 93
Indian Creek 9425 25.6 20.6 124 21.9 17.9 122
Kendall R.S. 7740 12.1 11.4 106 12.3 12.4 99
Larsen Creek 9000 11.0 10.6 104 13.7 11.9 115
Loomis Park 8240 15.3 14.0 109 15.5 15.6 99
New Fork Lake 8340 10.6 9.7 109 -M 9.8 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 13.6 12.2 111 14.5 12.8 113
Spring Creek Divide 9000 24.8 22.6 110 17.9 22.0 81
Triple Peak 8500 22.9 21.9 105 23.5 23.6 100
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Basin Index (%) 109 102
LOWER GREEN RIVER
Blacks Fork Jct 8869 12.4 7.8 159 13.0 10.9 119
Buck Pasture 9632 18.6 -M * 19.6 -M *
EF Blacks Fork GS 9360 13.2 10.8 122 10.3 10.0 103
Hams Fork 7840 14.3 10.5 136 13.1 9.7 135
Henrys Fork 10182 -M -M * 13.4 -M *
Hewinta 9500 12.0 9.5 126 14.6 12.0 122
Hickerson Park 9122 9.5 7.4 128 10.1 8.9 113
Hole-in-Rock 9168 8.5 6.9 123 9.7 8.8 110
Indian Creek 9425 25.6 20.6 124 21.9 17.9 122
Kelley R.S. 8180 19.1 13.5 141 19.5 14.6 134
Spirit Lk 10235 18.8 11.3 166 17.6 15.2 116
Steel Creek Park 10158 17.7 13.3 133 17.4 14.0 124
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Basin Index (%) 135 121
UPPER BEAR RIVER
Bear River RS 8777 13.4 8.3 161 14.4 10.7 135
Bug Lake 7987 26.6 17.1 156 21.7 16.0 136
Burts Miller Ranch 8000 9.2 5.4 170 12.7 6.8 187
Chalk Creek #1 9171 29.0 20.9 139 27.6 20.8 133
Giveout 6930 14.1 7.6 186 14.3 10.7 134
Hayden Fork 9130 20.2 13.4 151 24.2 18.3 132
Kelley R.S. 8180 19.1 13.5 141 19.5 14.6 134
Lily Lake 9133 14.9 11.2 133 15.7 13.8 114
Monte Cristo 8932 36.2 24.6 147 -M 22.7 *
Salt River Summit 7640 18.0 12.4 145 17.3 14.1 123
Spring Creek Divide 9000 24.8 22.6 110 17.9 22.0 81
Trial Lake 9992 32.8 20.1 163 31.4 20.0 157
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Basin Index (%) 146 129
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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.
