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 31 , 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 18.3 16.2 113 19.6 19.6 100
Blind Bull Sum 8650 24.5 23.6 104 16.9 17.5 97
Cottonwood Creek 7670 24.6 21.4 115 -M 24.4 *
East Rim Divide 7930 12.1 10.3 117 11.5 10.9 106
Grand Targhee 9260 44.1 40.1 110 -M 29.8 *
Granite Creek 6770 18.5 15.6 119 15.3 17.2 89
Grassy Lake 7265 34.3 31.6 109 37.3 33.4 112
Gros Ventre Summit 8750 12.0 12.6 95 10.9 11.8 92
Gunsight Pass 9820 13.7 12.6 109 12.9 13.2 98
Lewis Lake Divide 7850 35.4 30.0 118 30.7 31.8 97
Loomis Park 8240 16.0 15.3 105 16.1 16.4 98
Phillips Bench 8200 29.1 25.9 112 -M 26.1 *
Salt River Summit 7640 19.4 13.4 145 18.3 15.3 120
Snake River Station 6920 19.7 16.8 117 22.0 21.3 103
Somsen Ranch 6800 19.5 11.4 171 21.0 16.3 129
Spring Creek Divide 9000 26.4 24.2 109 19.4 23.1 84
Thumb Divide 7980 20.0 15.8 127 18.4 17.0 108
Togwotee Pass 9580 22.0 22.9 96 20.3 24.0 85
Triple Peak 8500 23.8 22.4 106 24.2 24.4 99
Two Ocean Plateau 9240 30.4 28.0 109 21.1 25.3 83
Willow Creek 8080 35.8 29.0 123 34.4 31.8 108
Younts Peak 8350 16.0 14.2 113 12.9 14.3 90
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Basin Index (%) 114 100
MADISON HEADWATERS IN WYOMING
Black Bear 8170 44.4 36.9 120 40.9 35.1 117
Canyon 7870 14.5 -M * 16.7 -M *
Madison Plateau 7750 29.5 21.7 136 28.1 23.5 120
West Yellowstone 6700 16.5 10.2 162 18.9 13.6 139
Whiskey Creek 6800 21.0 15.0 140 25.6 19.2 133
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Basin Index (%) 133 124
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 18.7 21.1 89 17.3 19.4 89
Canyon 7870 14.5 -M * 16.7 -M *
Evening Star 9200 25.8 24.2 107 27.6 26.8 103
Fisher Creek 9100 33.5 31.4 107 34.1 31.6 108
Monument Peak 8850 21.8 19.7 111 24.1 20.6 117
Northeast Entrance 7350 10.2 9.4 109 12.2 12.4 98
Parker Peak 9400 23.9 20.2 118 23.0 19.2 120
Sylvan Lake 8420 20.2 19.1 106 23.0 22.0 105
Thumb Divide 7980 20.0 15.8 127 18.4 17.0 108
Two Ocean Plateau 9240 30.4 28.0 109 21.1 25.3 83
White Mill 8700 24.2 23.0 105 22.9 21.8 105
Wolverine 7650 13.4 10.9 123 12.6 11.9 106
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Basin Index (%) 109 104
WIND RIVER
Burroughs Creek 8750 10.7 -M * 10.5 -M *
Castle Creek 8400 6.6 6.6 100 7.2 8.2 88
Cold Springs 9630 7.8 7.2 108 9.1 8.8 103
Deer Park 9700 22.9 14.0 164 23.0 17.0 135
Hobbs Park 10100 14.8 13.7 108 13.8 12.6 110
Kirwin 9550 10.4 10.4 100 12.5 11.4 110
Little Warm 9370 10.4 10.2 102 11.8 11.5 103
South Pass 9040 18.2 14.4 126 17.9 15.0 119
St. Lawrence Alt 8620 7.2 -M * 9.4 -M *
Togwotee Pass 9580 22.0 22.9 96 20.3 24.0 85
Townsend Creek 8700 10.8 8.9 121 11.9 10.6 112
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Basin Index (%) 114 107
BIGHORN BASIN
Bald Mtn. 9380 18.0 18.6 97 14.8 15.4 96
Bear Trap Meadow 8200 8.8 6.0 147 9.2 7.8 118
Bone Springs Div 9350 15.1 16.2 93 12.1 14.8 82
Grave Springs 8550 9.7 8.0 121 10.1 8.9 113
Kirwin 9550 10.4 10.4 100 12.5 11.4 110
Marquette 8760 8.8 6.8 129 9.4 8.5 111
Middle Powder 7760 11.2 10.4 108 9.4 9.4 100
Owl Creek 8975 7.6 5.4 141 8.2 5.8 141
Powder River Pass 9480 10.9 10.6 103 13.4 11.9 113
Shell Creek 9580 13.8 14.8 93 14.0 13.2 106
Timber Creek 7950 6.2 4.4 141 7.0 7.6 92
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Basin Index (%) 108 105
SHOSHONE RIVER
Blackwater 9780 20.7 21.8 95 20.8 20.8 100
Evening Star 9200 25.8 24.2 107 27.6 26.8 103
Marquette 8760 8.8 6.8 129 9.4 8.5 111
Sylvan Lake 8420 20.2 19.1 106 23.0 22.0 105
Sylvan Road 7120 10.9 10.9 100 14.4 15.6 92
Younts Peak 8350 16.0 14.2 113 12.9 14.3 90
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Basin Index (%) 106 100
POWDER RIVER
Bear Trap Meadow 8200 8.8 6.0 147 9.2 7.8 118
Cloud Peak Reservoir 9860 14.4 14.0 103 13.9 12.6 110
Grave Springs 8550 9.7 8.0 121 10.1 8.9 113
Hansen Sawmill 8360 8.5 6.6 129 8.6 8.0 108
Middle Powder 7760 11.2 10.4 108 9.4 9.4 100
Powder River Pass 9480 10.9 10.6 103 13.4 11.9 113
Soldier Park 8720 8.9 7.1 125 8.2 8.6 95
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Basin Index (%) 115 108
TONGUE RIVER
Big Goose 7990 9.9 8.2 121 10.4 9.4 111
Bone Springs Div 9350 15.1 16.2 93 12.1 14.8 82
Burgess Junction 7880 12.2 9.8 124 13.5 10.9 124
Dome Lake 8880 11.4 11.2 102 11.5 12.0 96
Little Goose 8870 11.0 9.2 120 11.7 11.4 103
Sucker Creek 8880 13.6 11.6 117 16.1 12.9 125
Tie Creek 6870 9.2 5.0 184 12.4 10.2 122
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Basin Index (%) 116 107
BELLE FOURCHE
Blind Park 6890 8.7 7.0 124 10.9 10.4 105
Cole Canyon 5910 8.1 5.1 159 9.7 8.5 114
North Rapid Creek 6130 7.6 6.6 115 8.4 8.4 100
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Basin Index (%) 130 106
CHEYENNE RIVER BASIN
Blind Park 6890 8.7 7.0 124 10.9 10.4 105
North Rapid Creek 6130 7.6 6.6 115 8.4 8.4 100
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Basin Index (%) 120 103
UPPER N. PLATTE
Arapaho Ridge 10976 25.0 20.7 121 23.8 20.9 114
Blackhall Mtn 9839 37.5 30.0 125 36.0 28.7 125
Cinnabar Park 9707 -M 19.9 * 22.4 22.8 98
Columbine 9167 30.0 21.8 138 25.9 23.2 112
Divide Peak 8730 28.3 19.4 146 28.2 20.8 136
Joe Wright 10158 24.8 19.5 127 26.4 25.0 106
Laprele Creek 8390 11.5 9.2 125 12.0 11.2 107
Med Bow 10512 38.6 -M * 31.0 -M *
Never Summer 10323 25.1 19.6 128 18.0 16.4 110
North French Creek 10153 30.0 27.3 110 28.5 25.7 111
Old Battle 9860 40.6 29.0 140 31.2 31.6 99
Rawah 9069 15.3 10.6 144 16.7 14.7 114
Sage Creek Basin 7850 25.6 13.0 197 20.4 12.4 165
Sand Lake 10098 -M 26.4 * -M 23.8 *
South Brush Creek 8495 15.7 11.8 133 14.3 13.2 108
Tower 10620 50.3 42.0 120 39.5 38.2 103
Webber Springs 9260 29.6 21.6 137 31.2 24.5 127
Whiskey Park 9020 39.2 25.4 154 34.6 26.4 131
Willow Creek Pass 9523 17.5 12.6 139 17.0 13.1 130
Zirkel 9338 32.6 27.6 118 33.7 30.0 112
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Basin Index (%) 133 115
SWEETWATER
Deer Park 9700 22.9 14.0 164 23.0 17.0 135
Larsen Creek 9000 11.4 10.4 110 14.0 13.0 108
South Pass 9040 18.2 14.4 126 17.9 15.0 119
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Basin Index (%) 135 122
LOWER N. PLATTE
Casper Mtn. 7920 12.9 12.9 100 12.6 13.2 95
Laprele Creek 8390 11.5 9.2 125 12.0 11.2 107
Reno Hill 8430 14.3 13.8 104 15.4 14.4 107
Windy Peak 7915 10.7 7.8 137 11.3 9.8 115
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Basin Index (%) 113 106
LARAMIE RIVER
Brooklyn Lake 10250 24.5 20.6 119 24.3 20.9 116
Cinnabar Park 9707 -M 19.9 * 22.4 22.8 98
Crow Creek 8335 5.4 5.9 92 8.6 10.1 85
Deadman Hill 10239 18.8 15.7 120 17.4 16.9 103
Rawah 9069 15.3 10.6 144 16.7 14.7 114
Roach 9740 18.2 15.0 121 20.4 18.2 112
Windy Peak 7915 10.7 7.8 137 11.3 9.8 115
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Basin Index (%) 123 107
S. PLATTE
Crow Creek 8335 5.4 5.9 92 8.6 10.1 85
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Basin Index (%) 92 85
LITTLE SNAKE RIVER
Battle Mountain 7498 18.4 11.0 167 22.0 14.4 153
Divide Peak 8730 28.3 19.4 146 28.2 20.8 136
Elk River 8739 28.8 17.6 164 26.6 18.1 147
Elkhead Divide 8800 32.5 -M * 27.0 -M *
Little Snake River 8928 38.8 25.4 153 37.4 31.0 121
Old Battle 9860 40.6 29.0 140 31.2 31.6 99
Sage Creek Basin 7850 25.6 13.0 197 20.4 12.4 165
Sandstone RS 8152 -M 12.4 * 24.8 17.2 144
Whiskey Park 9020 39.2 25.4 154 34.6 26.4 131
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Basin Index (%) 156 131
UPPER GREEN RIVER
Big Sandy Opening 9080 14.6 12.9 113 14.8 12.2 121
Blind Bull Sum 8650 24.5 23.6 104 16.9 17.5 97
East Rim Divide 7930 12.1 10.3 117 11.5 10.9 106
Elkhart Park G.S. 9400 11.9 12.2 98 11.3 12.4 91
Gros Ventre Summit 8750 12.0 12.6 95 10.9 11.8 92
Gunsight Pass 9820 13.7 12.6 109 12.9 13.2 98
Indian Creek 9425 27.1 22.9 118 22.9 19.3 119
Kendall R.S. 7740 12.6 11.3 112 12.6 13.0 97
Larsen Creek 9000 11.4 10.4 110 14.0 13.0 108
Loomis Park 8240 16.0 15.3 105 16.1 16.4 98
New Fork Lake 8340 11.1 10.4 107 -M 10.4 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 14.4 12.4 116 15.0 13.6 110
Spring Creek Divide 9000 26.4 24.2 109 19.4 23.1 84
Triple Peak 8500 23.8 22.4 106 24.2 24.4 99
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Basin Index (%) 108 101
LOWER GREEN RIVER
Blacks Fork Jct 8869 13.2 8.8 150 13.8 12.0 115
Buck Pasture 9632 20.0 -M * 20.2 -M *
EF Blacks Fork GS 9360 13.7 11.3 121 10.7 10.4 103
Hams Fork 7840 15.3 10.8 142 13.7 10.8 127
Henrys Fork 10182 -M -M * 14.3 -M *
Hewinta 9500 13.0 10.2 127 15.2 12.6 121
Hickerson Park 9122 10.6 7.5 141 10.8 9.7 111
Hole-in-Rock 9168 9.5 7.0 136 10.4 9.4 111
Indian Creek 9425 27.1 22.9 118 22.9 19.3 119
Kelley R.S. 8180 20.1 14.5 139 20.4 15.6 131
Spirit Lk 10235 -M 11.7 * 19.0 15.9 119
Steel Creek Park 10158 19.0 13.8 138 18.6 15.4 121
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Basin Index (%) 132 119
UPPER BEAR RIVER
Bear River RS 8777 14.1 9.4 150 15.2 11.4 133
Bug Lake 7987 28.5 18.3 156 23.4 17.2 136
Burts Miller Ranch 8000 10.2 5.4 189 13.5 7.1 190
Chalk Creek #1 9171 32.1 22.5 143 -M 22.2 *
Giveout 6930 15.5 8.0 194 15.1 11.6 130
Hayden Fork 9130 22.9 14.4 159 26.5 19.6 135
Kelley R.S. 8180 20.1 14.5 139 20.4 15.6 131
Lily Lake 9133 15.0 12.2 123 16.7 14.6 114
Monte Cristo 8932 40.0 25.8 155 36.4 25.3 144
Salt River Summit 7640 19.4 13.4 145 18.3 15.3 120
Spring Creek Divide 9000 26.4 24.2 109 19.4 23.1 84
Trial Lake 9992 35.2 21.4 164 33.4 21.4 156
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Basin Index (%) 147 131
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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.
