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 SATURDAY: APRIL 1 , 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 18.7 16.6 113 19.7 19.6 101
Blind Bull Sum 8650 24.7 23.5 105 16.9 17.5 97
Cottonwood Creek 7670 25.0 21.5 116 -M 24.4 *
East Rim Divide 7930 12.2 10.4 117 11.6 10.9 106
Grand Targhee 9260 44.8 40.8 110 -M 29.9 *
Granite Creek 6770 18.6 15.8 118 15.4 17.8 87
Grassy Lake 7265 34.6 31.8 109 37.3 33.4 112
Gros Ventre Summit 8750 12.1 12.8 95 10.9 12.0 91
Gunsight Pass 9820 13.7 12.6 109 12.9 13.4 96
Lewis Lake Divide 7850 -M 30.0 * -M 31.8 *
Loomis Park 8240 16.2 15.3 106 16.3 16.4 99
Phillips Bench 8200 29.5 25.9 114 26.0 26.1 100
Salt River Summit 7640 19.6 13.4 146 18.6 15.5 120
Snake River Station 6920 19.8 16.8 118 22.1 21.3 104
Somsen Ranch 6800 19.7 11.4 173 21.2 16.3 130
Spring Creek Divide 9000 26.9 24.2 111 19.8 23.1 86
Thumb Divide 7980 -M 15.8 * -M 17.0 *
Togwotee Pass 9580 22.2 22.9 97 20.4 24.0 85
Triple Peak 8500 24.1 22.4 108 24.6 24.4 101
Two Ocean Plateau 9240 30.5 28.2 108 21.1 25.4 83
Willow Creek 8080 36.2 29.0 125 34.8 31.8 109
Younts Peak 8350 16.1 14.2 113 13.1 14.4 91
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Basin Index (%) 114 100
MADISON HEADWATERS IN WYOMING
Black Bear 8170 44.8 37.0 121 41.2 35.6 116
Canyon 7870 14.5 -M * 16.8 -M *
Madison Plateau 7750 29.6 22.0 135 28.2 23.8 118
West Yellowstone 6700 16.6 10.2 163 19.0 13.6 140
Whiskey Creek 6800 21.2 15.2 139 25.6 19.2 133
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Basin Index (%) 133 124
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 18.8 21.2 89 17.4 19.4 90
Canyon 7870 14.5 -M * 16.8 -M *
Evening Star 9200 25.9 24.4 106 27.7 27.0 103
Fisher Creek 9100 33.7 32.0 105 34.3 31.6 109
Monument Peak 8850 21.8 19.8 110 24.2 20.8 116
Northeast Entrance 7350 10.2 9.4 109 12.2 12.4 98
Parker Peak 9400 24.0 20.0 120 23.0 19.3 119
Sylvan Lake 8420 20.3 19.1 106 23.3 22.4 104
Thumb Divide 7980 -M 15.8 * -M 17.0 *
Two Ocean Plateau 9240 30.5 28.2 108 21.1 25.4 83
White Mill 8700 24.3 23.2 105 23.0 22.0 105
Wolverine 7650 13.4 11.0 122 12.7 12.0 106
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Basin Index (%) 107 103
WIND RIVER
Burroughs Creek 8750 10.8 -M * 10.5 -M *
Castle Creek 8400 6.6 6.1 108 7.2 8.2 88
Cold Springs 9630 7.8 7.2 108 9.2 8.8 105
Deer Park 9700 22.8 14.0 163 22.9 17.0 135
Hobbs Park 10100 14.7 13.8 107 13.8 12.8 108
Kirwin 9550 10.4 10.4 100 12.5 11.6 108
Little Warm 9370 10.4 10.2 102 11.8 11.5 103
South Pass 9040 18.2 14.5 126 18.0 15.0 120
St. Lawrence Alt 8620 7.1 -M * 9.4 -M *
Togwotee Pass 9580 22.2 22.9 97 20.4 24.0 85
Townsend Creek 8700 10.9 8.9 122 11.9 10.7 111
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Basin Index (%) 115 107
BIGHORN BASIN
Bald Mtn. 9380 18.4 18.8 98 15.0 15.4 97
Bear Trap Meadow 8200 9.2 6.0 153 9.3 7.8 119
Bone Springs Div 9350 15.3 16.4 93 12.2 14.8 82
Grave Springs 8550 9.9 8.2 121 10.3 8.9 116
Kirwin 9550 10.4 10.4 100 12.5 11.6 108
Marquette 8760 8.7 6.8 128 9.3 8.6 108
Middle Powder 7760 11.7 10.5 111 9.7 9.6 101
Owl Creek 8975 7.6 5.5 138 8.2 5.8 141
Powder River Pass 9480 11.0 10.6 104 13.4 12.0 112
Shell Creek 9580 13.9 14.8 94 14.0 13.3 105
Timber Creek 7950 6.3 4.6 137 6.9 7.6 91
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Basin Index (%) 109 105
SHOSHONE RIVER
Blackwater 9780 20.8 22.0 95 20.9 21.0 100
Evening Star 9200 25.9 24.4 106 27.7 27.0 103
Marquette 8760 8.7 6.8 128 9.3 8.6 108
Sylvan Lake 8420 20.3 19.1 106 23.3 22.4 104
Sylvan Road 7120 10.7 10.6 101 14.4 15.6 92
Younts Peak 8350 16.1 14.2 113 13.1 14.4 91
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Basin Index (%) 106 100
POWDER RIVER
Bear Trap Meadow 8200 9.2 6.0 153 9.3 7.8 119
Cloud Peak Reservoir 9860 14.6 14.1 104 14.1 12.7 111
Grave Springs 8550 9.9 8.2 121 10.3 8.9 116
Hansen Sawmill 8360 8.6 6.6 130 8.7 8.1 107
Middle Powder 7760 11.7 10.5 111 9.7 9.6 101
Powder River Pass 9480 11.0 10.6 104 13.4 12.0 112
Soldier Park 8720 8.9 7.2 124 8.3 8.8 94
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Basin Index (%) 117 109
TONGUE RIVER
Big Goose 7990 10.3 8.0 129 10.7 9.4 114
Bone Springs Div 9350 15.3 16.4 93 12.2 14.8 82
Burgess Junction 7880 12.6 10.2 124 13.9 11.2 124
Dome Lake 8880 11.5 11.2 103 11.6 12.0 97
Little Goose 8870 11.4 9.3 123 12.0 11.4 105
Sucker Creek 8880 13.8 11.4 121 16.4 13.0 126
Tie Creek 6870 9.5 5.0 190 12.7 10.3 123
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Basin Index (%) 118 109
BELLE FOURCHE
Blind Park 6890 9.3 7.0 133 11.2 10.4 108
Cole Canyon 5910 8.5 5.2 163 10.1 8.6 117
North Rapid Creek 6130 7.9 6.6 120 8.8 8.4 105
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Basin Index (%) 137 110
CHEYENNE RIVER BASIN
Blind Park 6890 9.3 7.0 133 11.2 10.4 108
North Rapid Creek 6130 7.9 6.6 120 8.8 8.4 105
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Basin Index (%) 126 106
UPPER N. PLATTE
Arapaho Ridge 10976 25.4 21.0 121 24.2 21.1 115
Blackhall Mtn 9839 38.3 30.2 127 37.2 28.8 129
Cinnabar Park 9707 -M 20.0 * 22.6 22.8 99
Columbine 9167 30.4 22.0 138 26.8 23.4 115
Divide Peak 8730 28.8 19.4 148 28.7 21.1 136
Joe Wright 10158 24.7 19.6 126 26.5 25.2 105
Laprele Creek 8390 11.8 9.4 126 12.1 11.4 106
Med Bow 10512 39.6 -M * 31.0 -M *
Never Summer 10323 25.2 19.7 128 18.0 16.4 110
North French Creek 10153 30.0 27.6 109 28.6 25.9 110
Old Battle 9860 41.3 29.7 139 31.2 32.4 96
Rawah 9069 15.2 10.6 143 16.7 14.8 113
Sage Creek Basin 7850 25.8 13.2 195 20.6 12.5 165
Sand Lake 10098 -M 26.6 * -M 24.0 *
South Brush Creek 8495 15.6 11.9 131 14.2 13.4 106
Tower 10620 51.9 42.0 124 39.5 38.2 103
Webber Springs 9260 30.3 21.8 139 31.7 24.8 128
Whiskey Park 9020 39.7 25.4 156 35.4 26.6 133
Willow Creek Pass 9523 17.5 12.6 139 17.0 13.2 129
Zirkel 9338 33.6 27.6 122 34.6 30.0 115
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Basin Index (%) 133 116
SWEETWATER
Deer Park 9700 22.8 14.0 163 22.9 17.0 135
Larsen Creek 9000 11.7 10.0 117 14.0 13.2 106
South Pass 9040 18.2 14.5 126 18.0 15.0 120
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Basin Index (%) 137 121
LOWER N. PLATTE
Casper Mtn. 7920 13.1 13.0 101 12.7 13.3 95
Laprele Creek 8390 11.8 9.4 126 12.1 11.4 106
Reno Hill 8430 14.5 13.8 105 15.7 14.4 109
Windy Peak 7915 10.7 7.8 137 11.3 9.8 115
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Basin Index (%) 114 106
LARAMIE RIVER
Brooklyn Lake 10250 24.9 20.6 121 24.8 21.0 118
Cinnabar Park 9707 -M 20.0 * 22.6 22.8 99
Crow Creek 8335 5.3 6.0 88 8.5 10.1 84
Deadman Hill 10239 18.9 15.8 120 17.6 17.0 104
Rawah 9069 15.2 10.6 143 16.7 14.8 113
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 5.3 6.0 88 8.5 10.1 84
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Basin Index (%) 88 84
LITTLE SNAKE RIVER
Battle Mountain 7498 18.7 11.0 170 22.4 14.4 156
Divide Peak 8730 28.8 19.4 148 28.7 21.1 136
Elk River 8739 -M 17.8 * -M 18.2 *
Elkhead Divide 8800 32.5 -M * 26.9 -M *
Little Snake River 8928 39.6 25.5 155 37.4 31.1 120
Old Battle 9860 41.3 29.7 139 31.2 32.4 96
Sage Creek Basin 7850 25.8 13.2 195 20.6 12.5 165
Sandstone RS 8152 -M 12.6 * 25.1 17.2 146
Whiskey Park 9020 39.7 25.4 156 35.4 26.6 133
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Basin Index (%) 156 129
UPPER GREEN RIVER
Big Sandy Opening 9080 14.8 13.0 114 14.9 12.3 121
Blind Bull Sum 8650 24.7 23.5 105 16.9 17.5 97
East Rim Divide 7930 12.2 10.4 117 11.6 10.9 106
Elkhart Park G.S. 9400 11.9 12.2 98 11.2 12.4 90
Gros Ventre Summit 8750 12.1 12.8 95 10.9 12.0 91
Gunsight Pass 9820 13.7 12.6 109 12.9 13.4 96
Indian Creek 9425 27.4 23.3 118 23.2 19.4 120
Kendall R.S. 7740 12.6 11.4 111 12.7 13.0 98
Larsen Creek 9000 11.7 10.0 117 14.0 13.2 106
Loomis Park 8240 16.2 15.3 106 16.3 16.4 99
New Fork Lake 8340 11.2 10.3 109 -M 10.4 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 14.6 12.4 118 15.2 13.8 110
Spring Creek Divide 9000 26.9 24.2 111 19.8 23.1 86
Triple Peak 8500 24.1 22.4 108 24.6 24.4 101
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Basin Index (%) 109 101
LOWER GREEN RIVER
Blacks Fork Jct 8869 13.3 8.9 149 13.9 12.2 114
Buck Pasture 9632 20.3 -M * 20.3 -M *
EF Blacks Fork GS 9360 13.9 11.3 123 10.9 10.8 101
Hams Fork 7840 15.5 10.9 142 13.9 10.8 129
Henrys Fork 10182 -M -M * 14.5 -M *
Hewinta 9500 13.1 9.8 134 15.5 12.8 121
Hickerson Park 9122 10.7 7.6 141 10.8 9.8 110
Hole-in-Rock 9168 9.6 7.0 137 10.4 9.5 109
Indian Creek 9425 27.4 23.3 118 23.2 19.4 120
Kelley R.S. 8180 20.4 14.6 140 20.8 15.6 133
Spirit Lk 10235 20.2 12.7 159 19.0 15.9 119
Steel Creek Park 10158 19.4 13.8 141 19.0 15.8 120
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Basin Index (%) 136 119
UPPER BEAR RIVER
Bear River RS 8777 14.3 9.6 149 15.4 11.6 133
Bug Lake 7987 29.2 18.6 157 23.8 17.6 135
Burts Miller Ranch 8000 10.2 5.5 185 13.5 7.1 190
Chalk Creek #1 9171 32.5 22.6 144 -M 22.3 *
Giveout 6930 15.8 8.2 193 15.4 11.6 133
Hayden Fork 9130 23.5 14.6 161 26.5 19.8 134
Kelley R.S. 8180 20.4 14.6 140 20.8 15.6 133
Lily Lake 9133 15.3 12.2 125 16.9 14.6 116
Monte Cristo 8932 41.5 26.4 157 -M 25.6 *
Salt River Summit 7640 19.6 13.4 146 18.6 15.5 120
Spring Creek Divide 9000 26.9 24.2 111 19.8 23.1 86
Trial Lake 9992 35.5 21.5 165 33.6 21.8 154
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Basin Index (%) 149 129
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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.
