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 7 , 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 20.2 15.8 128 21.0 20.0 105
Blind Bull Sum 8650 26.7 23.8 112 17.5 17.6 99
Cottonwood Creek 7670 27.3 20.8 131 -M 25.2 *
East Rim Divide 7930 13.1 10.2 128 12.2 11.0 111
Grand Targhee 9260 45.4 43.4 105 -M 31.2 *
Granite Creek 6770 19.8 14.7 135 16.0 18.0 89
Grassy Lake 7265 36.0 32.7 110 39.3 34.7 113
Gros Ventre Summit 8750 12.8 12.9 99 11.4 12.0 95
Gunsight Pass 9820 14.5 13.0 112 13.4 13.8 97
Lewis Lake Divide 7850 38.2 30.6 125 -M 32.4 *
Loomis Park 8240 17.5 15.1 116 17.2 16.6 104
Phillips Bench 8200 30.5 26.2 116 -M 26.4 *
Salt River Summit 7640 21.7 12.8 170 20.2 16.0 126
Snake River Station 6920 20.9 16.4 127 23.0 22.4 103
Somsen Ranch 6800 -M 10.3 * -M 16.4 *
Spring Creek Divide 9000 28.9 24.8 117 -M 23.4 *
Thumb Divide 7980 21.4 16.4 130 19.4 17.5 111
Togwotee Pass 9580 23.4 23.2 101 21.6 24.5 88
Triple Peak 8500 26.5 22.8 116 26.7 24.8 108
Two Ocean Plateau 9240 32.0 29.0 110 21.2 26.4 80
Willow Creek 8080 39.3 29.5 133 37.0 32.8 113
Younts Peak 8350 17.0 14.6 116 13.6 14.7 93
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Basin Index (%) 119 102
MADISON HEADWATERS IN WYOMING
Black Bear 8170 46.4 38.1 122 42.4 37.0 115
Canyon 7870 14.8 -M * 17.0 -M *
Madison Plateau 7750 31.1 22.8 136 29.4 24.6 120
West Yellowstone 6700 17.5 9.4 186 19.8 13.8 143
Whiskey Creek 6800 21.8 15.0 145 26.8 19.8 135
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Basin Index (%) 137 124
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 19.7 21.4 92 18.5 19.8 93
Canyon 7870 14.8 -M * 17.0 -M *
Evening Star 9200 27.1 25.0 108 28.7 27.8 103
Fisher Creek 9100 34.9 32.8 106 35.4 32.4 109
Monument Peak 8850 22.3 20.5 109 24.6 21.4 115
Northeast Entrance 7350 10.6 8.4 126 12.6 13.0 97
Parker Peak 9400 25.0 21.2 118 23.2 19.8 117
Sylvan Lake 8420 21.1 19.3 109 24.1 23.3 103
Thumb Divide 7980 21.4 16.4 130 19.4 17.5 111
Two Ocean Plateau 9240 32.0 29.0 110 21.2 26.4 80
White Mill 8700 25.0 24.0 104 23.5 22.8 103
Wolverine 7650 13.7 9.9 138 12.9 12.4 104
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Basin Index (%) 111 103
WIND RIVER
Burroughs Creek 8750 11.9 -M * 11.4 -M *
Castle Creek 8400 7.0 6.3 111 7.4 8.6 86
Cold Springs 9630 9.1 7.0 130 10.7 9.4 114
Deer Park 9700 25.6 15.1 170 25.6 17.7 145
Hobbs Park 10100 17.4 14.3 122 16.3 13.5 121
Kirwin 9550 11.2 10.4 108 13.4 12.0 112
Little Warm 9370 11.9 10.0 119 13.2 11.8 112
South Pass 9040 21.0 14.6 144 20.0 15.4 130
St. Lawrence Alt 8620 8.9 -M * 11.1 -M *
Togwotee Pass 9580 23.4 23.2 101 21.6 24.5 88
Townsend Creek 8700 13.5 9.4 144 14.5 11.0 132
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Basin Index (%) 127 115
BIGHORN BASIN
Bald Mtn. 9380 19.2 19.4 99 15.6 16.0 98
Bear Trap Meadow 8200 -M 5.8 * 9.9 8.8 112
Bone Springs Div 9350 15.4 17.2 90 12.4 15.7 79
Grave Springs 8550 11.1 8.2 135 11.8 9.2 128
Kirwin 9550 11.2 10.4 108 13.4 12.0 112
Marquette 8760 10.1 7.4 136 10.7 9.3 115
Middle Powder 7760 13.2 10.8 122 10.6 9.8 108
Owl Creek 8975 8.8 5.2 169 9.1 6.0 152
Powder River Pass 9480 11.5 10.5 110 13.8 12.6 110
Shell Creek 9580 14.1 15.1 93 14.2 13.8 103
Timber Creek 7950 7.4 4.9 151 8.0 7.8 103
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Basin Index (%) 112 107
SHOSHONE RIVER
Blackwater 9780 22.0 23.0 96 22.1 22.0 100
Evening Star 9200 27.1 25.0 108 28.7 27.8 103
Marquette 8760 10.1 7.4 136 10.7 9.3 115
Sylvan Lake 8420 21.1 19.3 109 24.1 23.3 103
Sylvan Road 7120 11.8 10.6 111 14.8 16.0 92
Younts Peak 8350 17.0 14.6 116 13.6 14.7 93
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Basin Index (%) 109 101
POWDER RIVER
Bear Trap Meadow 8200 -M 5.8 * 9.9 8.8 112
Cloud Peak Reservoir 9860 15.8 14.7 107 15.3 13.5 113
Grave Springs 8550 11.1 8.2 135 11.8 9.2 128
Hansen Sawmill 8360 9.5 6.1 156 9.7 8.2 118
Middle Powder 7760 13.2 10.8 122 10.6 9.8 108
Powder River Pass 9480 11.5 10.5 110 13.8 12.6 110
Soldier Park 8720 10.1 7.6 133 9.3 9.4 99
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Basin Index (%) 123 112
TONGUE RIVER
Big Goose 7990 11.0 8.7 126 11.5 10.1 114
Bone Springs Div 9350 15.4 17.2 90 12.4 15.7 79
Burgess Junction 7880 13.0 11.0 118 14.3 12.1 118
Dome Lake 8880 12.6 11.4 111 12.5 13.0 96
Little Goose 8870 12.2 9.6 127 12.6 12.2 103
Sucker Creek 8880 14.7 12.2 120 17.1 13.9 123
Tie Creek 6870 10.6 4.8 221 13.7 10.7 128
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Basin Index (%) 119 107
BELLE FOURCHE
Blind Park 6890 10.1 6.6 153 11.7 10.8 108
Cole Canyon 5910 9.9 4.7 211 11.0 9.4 117
North Rapid Creek 6130 8.5 6.2 137 9.7 8.8 110
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Basin Index (%) 163 112
CHEYENNE RIVER BASIN
Blind Park 6890 10.1 6.6 153 11.7 10.8 108
North Rapid Creek 6130 8.5 6.2 137 9.7 8.8 110
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Basin Index (%) 145 109
UPPER N. PLATTE
Arapaho Ridge 10976 25.9 22.4 116 24.6 21.4 115
Blackhall Mtn 9839 39.8 30.5 130 38.3 29.4 130
Cinnabar Park 9707 -M 20.4 * 23.5 23.6 100
Columbine 9167 30.7 22.2 138 27.2 24.7 110
Divide Peak 8730 30.0 19.8 152 29.7 21.4 139
Joe Wright 10158 26.4 20.4 129 28.2 26.0 108
Laprele Creek 8390 13.4 9.4 143 13.8 11.6 119
Med Bow 10512 41.0 -M * -M -M *
Never Summer 10323 26.3 20.4 129 18.8 17.0 111
North French Creek 10153 31.1 29.6 105 29.8 26.8 111
Old Battle 9860 42.7 31.4 136 -M 34.6 *
Rawah 9069 15.6 10.6 147 17.2 15.5 111
Sage Creek Basin 7850 -M 12.0 * 20.7 13.3 156
Sand Lake 10098 29.5 27.6 107 27.9 24.8 112
South Brush Creek 8495 16.3 11.6 141 14.6 13.7 107
Tower 10620 53.1 43.3 123 -M 39.2 *
Webber Springs 9260 31.6 22.4 141 33.0 25.4 130
Whiskey Park 9020 41.1 27.0 152 36.1 27.4 132
Willow Creek Pass 9523 18.4 13.2 139 17.8 13.6 131
Zirkel 9338 34.6 28.1 123 35.5 30.7 116
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Basin Index (%) 130 119
SWEETWATER
Deer Park 9700 25.6 15.1 170 25.6 17.7 145
Larsen Creek 9000 12.6 9.6 131 14.9 13.4 111
South Pass 9040 21.0 14.6 144 20.0 15.4 130
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Basin Index (%) 151 130
LOWER N. PLATTE
Casper Mtn. 7920 16.1 13.8 117 14.8 13.8 107
Laprele Creek 8390 13.4 9.4 143 13.8 11.6 119
Reno Hill 8430 16.9 14.0 121 17.4 15.2 114
Windy Peak 7915 -M 7.8 * -M 10.2 *
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Basin Index (%) 125 113
LARAMIE RIVER
Brooklyn Lake 10250 26.3 22.0 120 26.1 21.8 120
Cinnabar Park 9707 -M 20.4 * 23.5 23.6 100
Crow Creek 8335 6.0 5.8 103 9.3 10.6 88
Deadman Hill 10239 20.1 16.2 124 18.6 17.8 104
Rawah 9069 15.6 10.6 147 17.2 15.5 111
Roach 9740 18.9 15.3 124 20.9 19.0 110
Windy Peak 7915 -M 7.8 * -M 10.2 *
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Basin Index (%) 124 107
S. PLATTE
Crow Creek 8335 6.0 5.8 103 9.3 10.6 88
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Basin Index (%) 103 88
LITTLE SNAKE RIVER
Battle Mountain 7498 19.2 10.2 188 23.0 15.0 153
Divide Peak 8730 30.0 19.8 152 29.7 21.4 139
Elk River 8739 30.0 17.2 174 27.9 19.2 145
Elkhead Divide 8800 33.9 -M * -M -M *
Little Snake River 8928 40.7 27.5 148 -M 32.7 *
Old Battle 9860 42.7 31.4 136 -M 34.6 *
Sage Creek Basin 7850 -M 12.0 * 20.7 13.3 156
Sandstone RS 8152 -M 12.8 * 25.8 17.8 145
Whiskey Park 9020 41.1 27.0 152 36.1 27.4 132
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Basin Index (%) 153 143
UPPER GREEN RIVER
Big Sandy Opening 9080 15.6 12.9 121 15.7 12.8 123
Blind Bull Sum 8650 26.7 23.8 112 17.5 17.6 99
East Rim Divide 7930 13.1 10.2 128 12.2 11.0 111
Elkhart Park G.S. 9400 12.7 12.5 102 12.0 12.6 95
Gros Ventre Summit 8750 12.8 12.9 99 11.4 12.0 95
Gunsight Pass 9820 14.5 13.0 112 13.4 13.8 97
Indian Creek 9425 30.1 23.5 128 25.1 19.6 128
Kendall R.S. 7740 13.4 11.2 120 13.4 13.0 103
Larsen Creek 9000 12.6 9.6 131 14.9 13.4 111
Loomis Park 8240 17.5 15.1 116 17.2 16.6 104
New Fork Lake 8340 11.8 10.5 112 -M 10.6 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 16.1 13.0 124 16.5 13.8 120
Spring Creek Divide 9000 28.9 24.8 117 -M 23.4 *
Triple Peak 8500 26.5 22.8 116 26.7 24.8 108
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Basin Index (%) 117 108
LOWER GREEN RIVER
Blacks Fork Jct 8869 14.6 8.4 174 15.1 12.2 124
Buck Pasture 9632 22.0 -M * 21.8 -M *
EF Blacks Fork GS 9360 15.5 11.3 137 12.2 10.8 113
Hams Fork 7840 17.3 10.8 160 15.3 11.0 139
Henrys Fork 10182 -M -M * 17.1 -M *
Hewinta 9500 14.4 10.8 133 16.9 13.4 126
Hickerson Park 9122 13.2 6.8 194 13.2 10.4 127
Hole-in-Rock 9168 11.8 7.2 164 12.6 10.1 125
Indian Creek 9425 30.1 23.5 128 25.1 19.6 128
Kelley R.S. 8180 22.4 14.6 153 22.4 16.0 140
Spirit Lk 10235 23.0 14.0 164 21.5 16.9 127
Steel Creek Park 10158 21.0 14.8 142 20.6 16.4 126
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Basin Index (%) 150 128
UPPER BEAR RIVER
Bear River RS 8777 15.8 8.4 188 16.7 11.8 142
Bug Lake 7987 31.8 18.3 174 25.8 18.1 143
Burts Miller Ranch 8000 11.8 5.2 227 14.8 7.8 190
Chalk Creek #1 9171 35.4 22.4 158 32.2 22.4 144
Giveout 6930 16.6 8.0 208 15.9 11.8 135
Hayden Fork 9130 25.4 14.6 174 28.0 20.5 137
Kelley R.S. 8180 22.4 14.6 153 22.4 16.0 140
Lily Lake 9133 16.7 12.6 133 18.0 15.2 118
Monte Cristo 8932 45.6 27.2 168 41.6 26.3 158
Salt River Summit 7640 21.7 12.8 170 20.2 16.0 126
Spring Creek Divide 9000 28.9 24.8 117 -M 23.4 *
Trial Lake 9992 37.4 21.8 172 34.7 22.3 156
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Basin Index (%) 162 144
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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.
