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: APRIL 21 , 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 19.5 14.2 137 22.1 21.4 103
Blind Bull Sum 8650 26.9 25.4 106 19.7 18.8 105
Cottonwood Creek 7670 26.1 20.6 127 29.4 26.7 110
East Rim Divide 7930 11.8 9.4 126 12.5 11.8 106
Grand Targhee 9260 49.1 46.5 106 30.9 34.6 89
Granite Creek 6770 18.6 12.3 151 16.1 19.6 82
Grassy Lake 7265 36.9 32.5 114 41.5 37.3 111
Gros Ventre Summit 8750 12.8 13.3 96 11.7 13.6 86
Gunsight Pass 9820 14.7 13.5 109 14.0 14.9 94
Lewis Lake Divide 7850 39.4 33.2 119 42.2 35.1 120
Loomis Park 8240 17.3 13.2 131 17.7 17.4 102
Phillips Bench 8200 30.6 26.7 115 31.7 27.6 115
Salt River Summit 7640 21.3 11.0 194 21.0 17.1 123
Snake River Station 6920 18.9 15.0 126 24.0 23.3 103
Somsen Ranch 6800 -M 7.0 * -M 17.4 *
Spring Creek Divide 9000 29.5 25.5 116 -M 24.6 *
Thumb Divide 7980 21.4 16.8 127 20.4 19.6 104
Togwotee Pass 9580 23.4 24.9 94 22.3 26.1 85
Triple Peak 8500 26.8 21.4 125 27.5 26.9 102
Two Ocean Plateau 9240 34.4 32.3 107 29.1 28.5 102
Willow Creek 8080 38.8 28.6 136 38.4 35.2 109
Younts Peak 8350 16.1 15.2 106 14.1 16.3 87
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Basin Index (%) 118 103
MADISON HEADWATERS IN WYOMING
Black Bear 8170 45.2 39.6 114 46.0 39.2 117
Canyon 7870 15.0 -M * 18.2 -M *
Madison Plateau 7750 31.7 23.5 135 31.4 25.8 122
West Yellowstone 6700 15.5 6.7 231 20.1 15.4 131
Whiskey Creek 6800 22.1 15.8 140 27.5 21.8 126
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Basin Index (%) 134 122
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 20.7 23.8 87 19.6 21.9 89
Canyon 7870 15.0 -M * 18.2 -M *
Evening Star 9200 28.0 27.1 103 30.5 30.4 100
Fisher Creek 9100 35.9 35.4 101 37.1 35.4 105
Monument Peak 8850 23.4 22.2 105 26.0 23.8 109
Northeast Entrance 7350 9.0 6.6 136 13.6 14.0 97
Parker Peak 9400 28.1 23.6 119 26.1 21.2 123
Sylvan Lake 8420 21.1 20.9 101 25.7 24.9 103
Thumb Divide 7980 21.4 16.8 127 20.4 19.6 104
Two Ocean Plateau 9240 34.4 32.3 107 29.1 28.5 102
White Mill 8700 26.2 26.0 101 24.7 24.2 102
Wolverine 7650 12.7 7.4 172 13.6 13.2 103
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Basin Index (%) 108 104
WIND RIVER
Burroughs Creek 8750 10.6 -M * 11.5 -M *
Castle Creek 8400 4.8 4.2 114 7.4 9.0 82
Cold Springs 9630 7.7 6.0 128 10.9 9.8 111
Deer Park 9700 24.9 16.0 156 25.7 20.3 127
Hobbs Park 10100 17.4 15.8 110 16.4 14.6 112
Kirwin 9550 10.6 11.9 89 13.8 13.6 101
Little Warm 9370 11.2 10.3 109 13.9 12.8 109
South Pass 9040 20.3 15.4 132 20.7 17.4 119
St. Lawrence Alt 8620 6.4 -M * 11.1 -M *
Togwotee Pass 9580 23.4 24.9 94 22.3 26.1 85
Townsend Creek 8700 12.9 9.6 134 14.4 13.0 111
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Basin Index (%) 117 107
BIGHORN BASIN
Bald Mtn. 9380 19.9 19.8 101 16.8 17.2 98
Bear Trap Meadow 8200 8.3 3.9 213 10.6 10.2 104
Bone Springs Div 9350 17.0 17.7 96 13.4 17.2 78
Grave Springs 8550 9.6 8.2 117 12.4 11.0 113
Kirwin 9550 10.6 11.9 89 13.8 13.6 101
Marquette 8760 9.4 8.0 118 11.0 10.7 103
Middle Powder 7760 12.5 12.0 104 11.0 11.1 99
Owl Creek 8975 6.1 3.8 161 9.5 7.2 132
Powder River Pass 9480 10.5 11.0 95 15.0 14.5 103
Shell Creek 9580 14.8 16.8 88 15.5 15.2 102
Timber Creek 7950 5.5 5.2 106 8.3 9.1 91
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Basin Index (%) 105 100
SHOSHONE RIVER
Blackwater 9780 23.4 25.2 93 23.8 24.0 99
Evening Star 9200 28.0 27.1 103 30.5 30.4 100
Marquette 8760 9.4 8.0 118 11.0 10.7 103
Sylvan Lake 8420 21.1 20.9 101 25.7 24.9 103
Sylvan Road 7120 8.5 9.6 89 16.0 17.6 91
Younts Peak 8350 16.1 15.2 106 14.1 16.3 87
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Basin Index (%) 100 98
POWDER RIVER
Bear Trap Meadow 8200 8.3 3.9 213 10.6 10.2 104
Cloud Peak Reservoir 9860 15.7 15.8 99 15.9 15.1 105
Grave Springs 8550 9.6 8.2 117 12.4 11.0 113
Hansen Sawmill 8360 7.8 5.2 150 10.2 9.8 104
Middle Powder 7760 12.5 12.0 104 11.0 11.1 99
Powder River Pass 9480 10.5 11.0 95 15.0 14.5 103
Soldier Park 8720 8.0 6.5 123 9.6 10.8 89
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Basin Index (%) 116 103
TONGUE RIVER
Big Goose 7990 10.4 8.7 120 11.8 11.1 106
Bone Springs Div 9350 17.0 17.7 96 13.4 17.2 78
Burgess Junction 7880 12.5 11.8 106 14.5 13.8 105
Dome Lake 8880 11.1 11.6 96 12.9 14.8 87
Little Goose 8870 10.2 10.7 95 13.0 13.9 94
Sucker Creek 8880 12.9 13.0 99 17.6 15.6 113
Tie Creek 6870 8.1 4.4 184 13.9 12.6 110
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Basin Index (%) 106 98
BELLE FOURCHE
Blind Park 6890 5.2 4.2 124 12.2 12.5 98
Cole Canyon 5910 5.8 2.2 264 11.5 10.2 113
North Rapid Creek 6130 4.7 3.9 121 10.1 10.2 99
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Basin Index (%) 152 103
CHEYENNE RIVER BASIN
Blind Park 6890 5.2 4.2 124 12.2 12.5 98
North Rapid Creek 6130 4.7 3.9 121 10.1 10.2 99
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Basin Index (%) 122 98
UPPER N. PLATTE
Arapaho Ridge 10976 26.5 23.9 111 25.8 24.0 108
Blackhall Mtn 9839 38.1 32.9 116 39.2 31.8 123
Cinnabar Park 9707 -M 19.7 * 24.2 24.6 98
Columbine 9167 26.2 21.3 123 27.7 27.0 103
Divide Peak 8730 28.6 19.3 148 30.5 23.3 131
Joe Wright 10158 25.8 22.0 117 29.6 28.5 104
Laprele Creek 8390 11.8 7.6 155 14.4 13.1 110
Med Bow 10512 39.8 -M * 36.2 -M *
Never Summer 10323 27.3 22.0 124 20.0 18.7 107
North French Creek 10153 30.2 31.5 96 31.4 29.6 106
Old Battle 9860 43.4 33.5 130 43.3 35.9 121
Rawah 9069 13.6 10.2 133 18.3 17.4 105
Sage Creek Basin 7850 24.6 6.2 397 21.2 13.8 154
Sand Lake 10098 29.5 30.4 97 29.3 27.0 109
South Brush Creek 8495 12.3 9.0 137 15.2 14.8 103
Tower 10620 52.6 46.2 114 52.6 42.2 125
Webber Springs 9260 29.5 22.0 134 33.5 27.4 122
Whiskey Park 9020 37.8 26.6 142 37.3 30.0 124
Willow Creek Pass 9523 19.3 14.7 131 18.7 14.8 126
Zirkel 9338 30.4 25.6 119 36.3 33.2 109
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Basin Index (%) 125 115
SWEETWATER
Deer Park 9700 24.9 16.0 156 25.7 20.3 127
Larsen Creek 9000 10.3 8.0 129 15.0 15.1 99
South Pass 9040 20.3 15.4 132 20.7 17.4 119
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Basin Index (%) 141 116
LOWER N. PLATTE
Casper Mtn. 7920 14.5 13.9 104 15.3 15.6 98
Laprele Creek 8390 11.8 7.6 155 14.4 13.1 110
Reno Hill 8430 16.3 14.2 115 17.9 17.2 104
Windy Peak 7915 10.8 6.6 164 13.3 11.4 117
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Basin Index (%) 126 106
LARAMIE RIVER
Brooklyn Lake 10250 24.9 22.0 113 26.8 23.7 113
Cinnabar Park 9707 -M 19.7 * 24.2 24.6 98
Crow Creek 8335 2.9 2.9 100 9.5 11.8 81
Deadman Hill 10239 20.0 17.7 113 19.5 19.6 99
Rawah 9069 13.6 10.2 133 18.3 17.4 105
Roach 9740 17.5 16.4 107 21.8 20.4 107
Windy Peak 7915 10.8 6.6 164 13.3 11.4 117
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Basin Index (%) 118 103
S. PLATTE
Crow Creek 8335 2.9 2.9 100 9.5 11.8 81
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Basin Index (%) 100 81
LITTLE SNAKE RIVER
Battle Mountain 7498 14.6 5.5 265 23.4 16.2 144
Divide Peak 8730 28.6 19.3 148 30.5 23.3 131
Elk River 8739 25.1 15.0 167 28.9 20.8 139
Elkhead Divide 8800 30.3 -M * 32.3 -M *
Little Snake River 8928 37.4 24.0 156 44.3 34.4 129
Old Battle 9860 43.4 33.5 130 43.3 35.9 121
Sage Creek Basin 7850 24.6 6.2 397 21.2 13.8 154
Sandstone RS 8152 22.5 10.0 225 26.0 18.8 138
Whiskey Park 9020 37.8 26.6 142 37.3 30.0 124
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Basin Index (%) 167 132
UPPER GREEN RIVER
Big Sandy Opening 9080 15.3 13.4 114 16.2 13.9 117
Blind Bull Sum 8650 26.9 25.4 106 19.7 18.8 105
East Rim Divide 7930 11.8 9.4 126 12.5 11.8 106
Elkhart Park G.S. 9400 12.7 13.0 98 12.4 13.2 94
Gros Ventre Summit 8750 12.8 13.3 96 11.7 13.6 86
Gunsight Pass 9820 14.7 13.5 109 14.0 14.9 94
Indian Creek 9425 29.9 24.5 122 25.6 20.4 125
Kendall R.S. 7740 12.3 8.7 141 13.8 13.8 100
Larsen Creek 9000 10.3 8.0 129 15.0 15.1 99
Loomis Park 8240 17.3 13.2 131 17.7 17.4 102
New Fork Lake 8340 11.0 9.2 120 -M 11.2 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 14.4 10.5 137 16.7 14.4 116
Spring Creek Divide 9000 29.5 25.5 116 -M 24.6 *
Triple Peak 8500 26.8 21.4 125 27.5 26.9 102
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Basin Index (%) 118 104
LOWER GREEN RIVER
Blacks Fork Jct 8869 13.8 7.0 197 15.6 13.4 116
Buck Pasture 9632 20.4 -M * 22.9 -M *
EF Blacks Fork GS 9360 13.6 11.0 124 12.5 12.6 99
Hams Fork 7840 16.0 7.1 225 15.8 11.5 137
Henrys Fork 10182 -M -M * 16.6 -M *
Hewinta 9500 12.5 7.8 160 16.9 15.0 113
Hickerson Park 9122 9.7 5.4 180 13.2 11.3 117
Hole-in-Rock 9168 9.2 6.0 153 12.5 10.9 115
Indian Creek 9425 29.9 24.5 122 25.6 20.4 125
Kelley R.S. 8180 22.3 14.0 159 22.9 17.2 133
Spirit Lk 10235 22.6 12.9 175 22.0 19.1 115
Steel Creek Park 10158 21.4 16.0 134 20.7 17.4 119
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Basin Index (%) 153 119
UPPER BEAR RIVER
Bear River RS 8777 12.2 3.0 407 17.0 13.0 131
Bug Lake 7987 31.3 17.2 182 26.0 18.8 138
Burts Miller Ranch 8000 7.8 .0 * 14.9 8.7 171
Chalk Creek #1 9171 34.4 22.6 152 33.1 24.2 137
Giveout 6930 14.9 2.7 552 16.2 13.2 123
Hayden Fork 9130 23.9 11.4 210 29.4 21.9 134
Kelley R.S. 8180 22.3 14.0 159 22.9 17.2 133
Lily Lake 9133 15.6 11.2 139 18.4 16.0 115
Monte Cristo 8932 46.4 26.1 178 42.2 27.0 156
Salt River Summit 7640 21.3 11.0 194 21.0 17.1 123
Spring Creek Divide 9000 29.5 25.5 116 -M 24.6 *
Trial Lake 9992 39.1 22.8 171 35.6 23.4 152
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Basin Index (%) 178 138
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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.
