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: APRIL 16 , 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 19.6 15.2 129 21.8 21.1 103
Blind Bull Sum 8650 26.7 24.9 107 19.5 18.2 107
Cottonwood Creek 7670 25.8 20.4 126 28.8 26.2 110
East Rim Divide 7930 12.0 9.7 124 12.2 11.6 105
Grand Targhee 9260 47.7 46.2 103 30.4 33.8 90
Granite Creek 6770 19.2 13.0 148 16.0 19.2 83
Grassy Lake 7265 36.4 32.4 112 40.6 36.6 111
Gros Ventre Summit 8750 12.8 13.0 98 11.7 13.0 90
Gunsight Pass 9820 13.8 13.3 104 13.5 14.6 92
Lewis Lake Divide 7850 38.4 32.3 119 41.2 34.4 120
Loomis Park 8240 17.4 14.6 119 17.3 17.2 101
Phillips Bench 8200 30.7 26.4 116 31.3 27.3 115
Salt River Summit 7640 21.2 11.5 184 20.7 16.7 124
Snake River Station 6920 19.7 15.0 131 23.6 23.2 102
Somsen Ranch 6800 -M 9.1 * -M 17.3 *
Spring Creek Divide 9000 29.6 25.2 117 -M 24.4 *
Thumb Divide 7980 21.2 16.0 132 20.1 18.9 106
Togwotee Pass 9580 23.3 24.6 95 21.9 25.6 86
Triple Peak 8500 26.5 22.0 120 26.9 25.8 104
Two Ocean Plateau 9240 33.9 31.9 106 28.4 28.1 101
Willow Creek 8080 39.1 28.4 138 37.2 34.5 108
Younts Peak 8350 16.1 15.0 107 13.8 15.9 87
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Basin Index (%) 118 103
MADISON HEADWATERS IN WYOMING
Black Bear 8170 43.4 39.4 110 44.8 38.2 117
Canyon 7870 14.9 -M * 18.0 -M *
Madison Plateau 7750 31.7 23.2 137 30.8 25.4 121
West Yellowstone 6700 15.4 7.4 208 19.9 14.7 135
Whiskey Creek 6800 21.9 15.5 141 27.0 20.8 130
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Basin Index (%) 131 124
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 20.6 23.1 89 19.3 21.4 90
Canyon 7870 14.9 -M * 18.0 -M *
Evening Star 9200 27.5 25.9 106 29.9 29.2 102
Fisher Creek 9100 35.4 35.2 101 36.5 35.1 104
Monument Peak 8850 23.1 21.7 106 25.5 23.0 111
Northeast Entrance 7350 9.5 7.8 122 13.2 13.4 99
Parker Peak 9400 27.0 22.6 119 25.4 21.0 121
Sylvan Lake 8420 20.8 20.2 103 25.0 24.3 103
Thumb Divide 7980 21.2 16.0 132 20.1 18.9 106
Two Ocean Plateau 9240 33.9 31.9 106 28.4 28.1 101
White Mill 8700 25.8 25.1 103 24.4 23.5 104
Wolverine 7650 12.6 8.4 150 13.3 12.8 104
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Basin Index (%) 108 104
WIND RIVER
Burroughs Creek 8750 11.1 -M * 11.3 -M *
Castle Creek 8400 5.3 5.6 95 7.3 9.0 81
Cold Springs 9630 7.8 6.7 116 10.7 9.8 109
Deer Park 9700 24.9 15.8 158 25.5 19.5 131
Hobbs Park 10100 17.3 15.4 112 16.3 14.4 113
Kirwin 9550 9.9 11.6 85 13.6 12.8 106
Little Warm 9370 11.2 10.3 109 13.4 12.4 108
South Pass 9040 20.3 15.7 129 20.7 16.5 125
St. Lawrence Alt 8620 6.9 -M * 11.0 -M *
Togwotee Pass 9580 23.3 24.6 95 21.9 25.6 86
Townsend Creek 8700 13.0 10.0 130 14.4 12.8 112
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Basin Index (%) 115 108
BIGHORN BASIN
Bald Mtn. 9380 19.2 19.7 97 15.8 16.8 94
Bear Trap Meadow 8200 8.4 4.8 175 10.1 9.6 105
Bone Springs Div 9350 15.8 18.0 88 12.7 16.7 76
Grave Springs 8550 9.7 8.4 115 11.9 10.7 111
Kirwin 9550 9.9 11.6 85 13.6 12.8 106
Marquette 8760 9.5 7.7 123 11.0 10.4 106
Middle Powder 7760 12.2 11.6 105 10.8 10.4 104
Owl Creek 8975 8.2 5.0 164 9.5 6.8 140
Powder River Pass 9480 10.2 10.4 98 14.0 13.6 103
Shell Creek 9580 13.8 16.2 85 14.5 14.5 100
Timber Creek 7950 6.4 5.2 123 8.3 8.8 94
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Basin Index (%) 104 101
SHOSHONE RIVER
Blackwater 9780 22.8 24.6 93 23.2 23.4 99
Evening Star 9200 27.5 25.9 106 29.9 29.2 102
Marquette 8760 9.5 7.7 123 11.0 10.4 106
Sylvan Lake 8420 20.8 20.2 103 25.0 24.3 103
Sylvan Road 7120 9.5 10.2 93 15.6 17.0 92
Younts Peak 8350 16.1 15.0 107 13.8 15.9 87
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Basin Index (%) 103 99
POWDER RIVER
Bear Trap Meadow 8200 8.4 4.8 175 10.1 9.6 105
Cloud Peak Reservoir 9860 15.7 15.1 104 15.4 14.6 105
Grave Springs 8550 9.7 8.4 115 11.9 10.7 111
Hansen Sawmill 8360 7.6 6.1 125 9.8 9.4 104
Middle Powder 7760 12.2 11.6 105 10.8 10.4 104
Powder River Pass 9480 10.2 10.4 98 14.0 13.6 103
Soldier Park 8720 8.0 6.6 121 9.3 10.4 89
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Basin Index (%) 114 103
TONGUE RIVER
Big Goose 7990 10.4 8.9 117 11.6 10.8 107
Bone Springs Div 9350 15.8 18.0 88 12.7 16.7 76
Burgess Junction 7880 12.3 11.6 106 14.3 13.2 108
Dome Lake 8880 11.0 12.0 92 12.5 13.8 91
Little Goose 8870 10.4 10.6 98 12.7 13.5 94
Sucker Creek 8880 13.5 13.0 104 17.0 14.9 114
Tie Creek 6870 8.7 4.6 189 13.7 12.0 114
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Basin Index (%) 104 100
BELLE FOURCHE
Blind Park 6890 6.5 4.6 141 11.7 11.9 98
Cole Canyon 5910 6.9 3.2 216 10.9 9.6 114
North Rapid Creek 6130 6.0 5.2 115 9.9 9.6 103
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Basin Index (%) 149 105
CHEYENNE RIVER BASIN
Blind Park 6890 6.5 4.6 141 11.7 11.9 98
North Rapid Creek 6130 6.0 5.2 115 9.9 9.6 103
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Basin Index (%) 128 100
UPPER N. PLATTE
Arapaho Ridge 10976 25.5 23.2 110 25.5 23.0 111
Blackhall Mtn 9839 37.6 31.5 119 38.9 31.3 124
Cinnabar Park 9707 -M 20.8 * 24.0 24.5 98
Columbine 9167 27.2 21.4 127 27.6 26.3 105
Divide Peak 8730 27.6 19.6 141 30.0 22.6 133
Joe Wright 10158 26.3 21.9 120 29.3 27.1 108
Laprele Creek 8390 11.8 8.6 137 14.0 12.6 111
Med Bow 10512 38.9 -M * 35.5 -M *
Never Summer 10323 26.9 21.3 126 19.7 18.3 108
North French Creek 10153 29.5 31.6 93 30.6 28.3 108
Old Battle 9860 43.0 33.2 130 -M 35.6 *
Rawah 9069 13.5 10.2 132 17.9 16.5 108
Sage Creek Basin 7850 25.1 9.9 254 21.0 13.5 156
Sand Lake 10098 28.7 30.0 96 28.5 26.6 107
South Brush Creek 8495 13.3 9.8 136 14.9 14.2 105
Tower 10620 52.5 45.1 116 48.5 41.2 118
Webber Springs 9260 29.9 22.2 135 33.4 26.7 125
Whiskey Park 9020 37.3 26.7 140 36.6 28.8 127
Willow Creek Pass 9523 18.9 14.4 131 18.4 14.6 126
Zirkel 9338 31.8 26.0 122 35.9 32.5 110
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Basin Index (%) 125 115
SWEETWATER
Deer Park 9700 24.9 15.8 158 25.5 19.5 131
Larsen Creek 9000 10.7 8.7 123 14.8 14.4 103
South Pass 9040 20.3 15.7 129 20.7 16.5 125
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Basin Index (%) 139 121
LOWER N. PLATTE
Casper Mtn. 7920 14.6 13.6 107 15.2 15.0 101
Laprele Creek 8390 11.8 8.6 137 14.0 12.6 111
Reno Hill 8430 16.4 14.0 117 17.6 16.6 106
Windy Peak 7915 10.9 7.5 145 13.0 11.0 118
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Basin Index (%) 123 108
LARAMIE RIVER
Brooklyn Lake 10250 24.6 22.0 112 26.6 23.4 114
Cinnabar Park 9707 -M 20.8 * 24.0 24.5 98
Crow Creek 8335 3.8 4.5 84 9.6 11.2 86
Deadman Hill 10239 19.5 16.6 117 19.4 18.8 103
Rawah 9069 13.5 10.2 132 17.9 16.5 108
Roach 9740 17.8 16.0 111 21.7 20.0 108
Windy Peak 7915 10.9 7.5 145 13.0 11.0 118
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Basin Index (%) 117 105
S. PLATTE
Crow Creek 8335 3.8 4.5 84 9.6 11.2 86
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Basin Index (%) 84 86
LITTLE SNAKE RIVER
Battle Mountain 7498 15.5 7.1 218 23.1 16.0 144
Divide Peak 8730 27.6 19.6 141 30.0 22.6 133
Elk River 8739 25.8 16.6 155 28.6 20.4 140
Elkhead Divide 8800 30.7 -M * 32.2 -M *
Little Snake River 8928 37.4 25.8 145 43.8 33.8 130
Old Battle 9860 43.0 33.2 130 -M 35.6 *
Sage Creek Basin 7850 25.1 9.9 254 21.0 13.5 156
Sandstone RS 8152 23.4 11.5 203 25.8 18.5 139
Whiskey Park 9020 37.3 26.7 140 36.6 28.8 127
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Basin Index (%) 156 136
UPPER GREEN RIVER
Big Sandy Opening 9080 14.9 13.8 108 15.7 13.8 114
Blind Bull Sum 8650 26.7 24.9 107 19.5 18.2 107
East Rim Divide 7930 12.0 9.7 124 12.2 11.6 105
Elkhart Park G.S. 9400 12.6 12.9 98 12.2 13.0 94
Gros Ventre Summit 8750 12.8 13.0 98 11.7 13.0 90
Gunsight Pass 9820 13.8 13.3 104 13.5 14.6 92
Indian Creek 9425 29.5 24.8 119 25.2 20.2 125
Kendall R.S. 7740 12.3 10.0 123 13.5 13.5 100
Larsen Creek 9000 10.7 8.7 123 14.8 14.4 103
Loomis Park 8240 17.4 14.6 119 17.3 17.2 101
New Fork Lake 8340 11.1 9.8 113 -M 10.9 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 14.2 11.5 123 16.4 14.1 116
Spring Creek Divide 9000 29.6 25.2 117 -M 24.4 *
Triple Peak 8500 26.5 22.0 120 26.9 25.8 104
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Basin Index (%) 114 105
LOWER GREEN RIVER
Blacks Fork Jct 8869 14.0 7.6 184 15.1 12.8 118
Buck Pasture 9632 21.3 -M * 22.5 -M *
EF Blacks Fork GS 9360 13.7 11.6 118 12.2 11.8 103
Hams Fork 7840 16.2 8.8 184 15.4 11.3 136
Henrys Fork 10182 -M -M * 16.2 -M *
Hewinta 9500 12.7 9.4 135 16.7 14.2 118
Hickerson Park 9122 11.2 6.6 170 13.2 11.0 120
Hole-in-Rock 9168 9.1 6.5 140 12.6 10.7 118
Indian Creek 9425 29.5 24.8 119 25.2 20.2 125
Kelley R.S. 8180 22.2 14.6 152 22.6 16.9 134
Spirit Lk 10235 22.8 13.4 170 22.0 18.6 118
Steel Creek Park 10158 21.7 15.4 141 20.8 17.0 122
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Basin Index (%) 146 122
UPPER BEAR RIVER
Bear River RS 8777 13.6 6.4 212 16.6 12.6 132
Bug Lake 7987 31.1 18.5 168 25.6 18.6 138
Burts Miller Ranch 8000 9.3 2.1 443 14.8 8.4 176
Chalk Creek #1 9171 34.5 23.6 146 32.8 24.0 137
Giveout 6930 15.3 4.5 340 15.9 13.0 122
Hayden Fork 9130 23.6 14.0 169 28.5 21.7 131
Kelley R.S. 8180 22.2 14.6 152 22.6 16.9 134
Lily Lake 9133 15.6 12.7 123 18.0 16.0 112
Monte Cristo 8932 45.0 27.4 164 -M 26.8 *
Salt River Summit 7640 21.2 11.5 184 20.7 16.7 124
Spring Creek Divide 9000 29.6 25.2 117 -M 24.4 *
Trial Lake 9992 38.9 22.4 174 35.4 23.0 154
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Basin Index (%) 164 135
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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.
