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 15 , 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 19.3 14.8 130 21.7 20.9 104
Blind Bull Sum 8650 26.6 24.8 107 19.5 17.8 110
Cottonwood Creek 7670 25.7 20.4 126 28.8 26.2 110
East Rim Divide 7930 12.1 9.7 125 12.1 11.5 105
Grand Targhee 9260 47.8 45.9 104 -M 33.8 *
Granite Creek 6770 19.2 13.2 145 16.0 19.1 84
Grassy Lake 7265 36.5 32.4 113 40.6 36.3 112
Gros Ventre Summit 8750 12.7 12.9 98 11.7 12.8 91
Gunsight Pass 9820 13.6 13.0 105 13.4 14.4 93
Lewis Lake Divide 7850 37.9 32.2 118 41.2 33.9 122
Loomis Park 8240 17.4 14.6 119 17.3 17.2 101
Phillips Bench 8200 30.5 26.2 116 31.2 27.2 115
Salt River Summit 7640 20.9 11.8 177 20.7 16.4 126
Snake River Station 6920 19.8 15.0 132 23.7 23.2 102
Somsen Ranch 6800 -M 9.2 * -M 17.3 *
Spring Creek Divide 9000 30.0 25.2 119 -M 24.4 *
Thumb Divide 7980 20.9 16.0 131 20.0 18.6 108
Togwotee Pass 9580 23.1 24.0 96 22.0 25.2 87
Triple Peak 8500 26.4 22.1 119 26.8 25.7 104
Two Ocean Plateau 9240 33.9 31.2 109 28.3 27.5 103
Willow Creek 8080 38.6 28.1 137 37.1 34.4 108
Younts Peak 8350 16.1 14.6 110 13.9 15.6 89
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Basin Index (%) 118 105
MADISON HEADWATERS IN WYOMING
Black Bear 8170 42.8 39.0 110 44.8 37.9 118
Canyon 7870 14.9 -M * 18.0 -M *
Madison Plateau 7750 32.1 23.0 140 30.8 25.3 122
West Yellowstone 6700 15.5 7.7 201 19.9 14.3 139
Whiskey Creek 6800 22.0 15.1 146 26.9 20.8 129
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Basin Index (%) 133 125
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 20.7 22.9 90 19.1 20.9 91
Canyon 7870 14.9 -M * 18.0 -M *
Evening Star 9200 27.3 25.9 105 29.8 29.0 103
Fisher Creek 9100 35.4 34.8 102 36.4 34.5 106
Monument Peak 8850 23.0 21.6 106 25.5 22.9 111
Northeast Entrance 7350 9.5 8.0 119 13.2 13.4 99
Parker Peak 9400 26.8 22.4 120 25.4 20.8 122
Sylvan Lake 8420 20.7 19.8 105 25.1 24.2 104
Thumb Divide 7980 20.9 16.0 131 20.0 18.6 108
Two Ocean Plateau 9240 33.9 31.2 109 28.3 27.5 103
White Mill 8700 25.8 25.1 103 24.4 23.4 104
Wolverine 7650 12.6 8.4 150 13.3 12.8 104
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Basin Index (%) 109 105
WIND RIVER
Burroughs Creek 8750 11.0 -M * 11.3 -M *
Castle Creek 8400 5.3 5.6 95 7.3 9.0 81
Cold Springs 9630 7.7 6.7 115 10.7 9.8 109
Deer Park 9700 24.7 15.4 160 25.5 19.3 132
Hobbs Park 10100 16.7 15.5 108 16.3 14.3 114
Kirwin 9550 9.7 11.1 87 13.6 12.6 108
Little Warm 9370 10.9 10.2 107 13.4 12.2 110
South Pass 9040 20.0 15.8 127 20.7 16.5 125
St. Lawrence Alt 8620 6.9 -M * 11.0 -M *
Togwotee Pass 9580 23.1 24.0 96 22.0 25.2 87
Townsend Creek 8700 12.6 9.6 131 14.4 12.8 112
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Basin Index (%) 115 109
BIGHORN BASIN
Bald Mtn. 9380 19.3 19.6 98 15.7 16.6 95
Bear Trap Meadow 8200 8.3 5.2 160 10.0 9.6 104
Bone Springs Div 9350 15.9 18.2 87 12.6 16.5 76
Grave Springs 8550 9.5 8.6 110 11.9 10.7 111
Kirwin 9550 9.7 11.1 87 13.6 12.6 108
Marquette 8760 9.3 7.8 119 10.9 10.0 109
Middle Powder 7760 12.0 11.8 102 10.7 10.2 105
Owl Creek 8975 -M 5.2 * 9.6 6.7 143
Powder River Pass 9480 10.0 10.4 96 14.0 13.6 103
Shell Creek 9580 13.9 16.0 87 14.5 14.4 101
Timber Creek 7950 6.2 5.1 122 8.3 8.6 97
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Basin Index (%) 100 102
SHOSHONE RIVER
Blackwater 9780 22.8 24.4 93 23.2 23.4 99
Evening Star 9200 27.3 25.9 105 29.8 29.0 103
Marquette 8760 9.3 7.8 119 10.9 10.0 109
Sylvan Lake 8420 20.7 19.8 105 25.1 24.2 104
Sylvan Road 7120 9.5 10.3 92 15.6 16.8 93
Younts Peak 8350 16.1 14.6 110 13.9 15.6 89
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Basin Index (%) 103 100
POWDER RIVER
Bear Trap Meadow 8200 8.3 5.2 160 10.0 9.6 104
Cloud Peak Reservoir 9860 15.4 15.3 101 15.4 14.5 106
Grave Springs 8550 9.5 8.6 110 11.9 10.7 111
Hansen Sawmill 8360 7.5 6.2 121 9.8 9.2 107
Middle Powder 7760 12.0 11.8 102 10.7 10.2 105
Powder River Pass 9480 10.0 10.4 96 14.0 13.6 103
Soldier Park 8720 7.8 6.4 122 9.4 10.4 90
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Basin Index (%) 110 104
TONGUE RIVER
Big Goose 7990 10.3 9.0 114 11.5 10.8 106
Bone Springs Div 9350 15.9 18.2 87 12.6 16.5 76
Burgess Junction 7880 12.3 11.5 107 14.3 13.0 110
Dome Lake 8880 10.8 12.1 89 12.4 13.8 90
Little Goose 8870 10.4 10.6 98 12.7 13.0 98
Sucker Creek 8880 13.1 13.0 101 17.0 14.9 114
Tie Creek 6870 8.6 4.4 195 13.7 11.8 116
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Basin Index (%) 103 100
BELLE FOURCHE
Blind Park 6890 6.4 4.8 133 11.7 11.9 98
Cole Canyon 5910 6.7 3.4 197 11.0 9.6 115
North Rapid Creek 6130 6.0 5.4 111 9.8 9.6 102
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Basin Index (%) 140 105
CHEYENNE RIVER BASIN
Blind Park 6890 6.4 4.8 133 11.7 11.9 98
North Rapid Creek 6130 6.0 5.4 111 9.8 9.6 102
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Basin Index (%) 122 100
UPPER N. PLATTE
Arapaho Ridge 10976 25.2 23.0 110 25.4 22.6 112
Blackhall Mtn 9839 37.2 31.2 119 38.5 30.6 126
Cinnabar Park 9707 -M 20.8 * 23.8 24.5 97
Columbine 9167 27.2 20.9 130 27.5 26.0 106
Divide Peak 8730 27.2 19.8 137 29.8 22.0 135
Joe Wright 10158 26.3 21.8 121 29.0 26.6 109
Laprele Creek 8390 11.5 8.6 134 14.0 12.4 113
Med Bow 10512 38.2 -M * 35.1 -M *
Never Summer 10323 26.7 20.8 128 19.7 18.0 109
North French Creek 10153 29.1 31.6 92 30.2 28.2 107
Old Battle 9860 42.8 32.6 131 -M 35.4 *
Rawah 9069 13.4 10.2 131 17.8 16.4 109
Sage Creek Basin 7850 24.8 10.0 248 20.9 13.5 155
Sand Lake 10098 28.6 29.8 96 28.3 26.5 107
South Brush Creek 8495 12.9 10.1 128 14.8 14.2 104
Tower 10620 52.3 44.4 118 48.6 41.0 119
Webber Springs 9260 29.5 21.4 138 33.3 26.1 128
Whiskey Park 9020 37.2 26.6 140 36.4 28.4 128
Willow Creek Pass 9523 18.8 14.3 131 18.5 14.4 128
Zirkel 9338 31.7 25.4 125 35.8 31.6 113
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Basin Index (%) 125 116
SWEETWATER
Deer Park 9700 24.7 15.4 160 25.5 19.3 132
Larsen Creek 9000 10.8 8.6 126 14.8 14.3 103
South Pass 9040 20.0 15.8 127 20.7 16.5 125
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Basin Index (%) 139 122
LOWER N. PLATTE
Casper Mtn. 7920 14.4 14.0 103 15.0 14.8 101
Laprele Creek 8390 11.5 8.6 134 14.0 12.4 113
Reno Hill 8430 16.2 14.3 113 17.6 16.6 106
Windy Peak 7915 10.7 7.4 145 13.0 11.0 118
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Basin Index (%) 119 109
LARAMIE RIVER
Brooklyn Lake 10250 24.5 22.0 111 26.4 23.0 115
Cinnabar Park 9707 -M 20.8 * 23.8 24.5 97
Crow Creek 8335 3.7 4.3 86 9.5 11.1 86
Deadman Hill 10239 19.5 16.6 117 19.4 18.7 104
Rawah 9069 13.4 10.2 131 17.8 16.4 109
Roach 9740 17.7 15.8 112 21.6 20.0 108
Windy Peak 7915 10.7 7.4 145 13.0 11.0 118
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Basin Index (%) 117 105
S. PLATTE
Crow Creek 8335 3.7 4.3 86 9.5 11.1 86
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Basin Index (%) 86 86
LITTLE SNAKE RIVER
Battle Mountain 7498 15.2 7.5 203 23.1 16.0 144
Divide Peak 8730 27.2 19.8 137 29.8 22.0 135
Elk River 8739 25.5 16.4 155 28.3 20.0 142
Elkhead Divide 8800 30.4 -M * 32.2 -M *
Little Snake River 8928 37.1 25.6 145 43.6 33.1 132
Old Battle 9860 42.8 32.6 131 -M 35.4 *
Sage Creek Basin 7850 24.8 10.0 248 20.9 13.5 155
Sandstone RS 8152 23.6 11.9 198 25.7 18.4 140
Whiskey Park 9020 37.2 26.6 140 36.4 28.4 128
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Basin Index (%) 155 137
UPPER GREEN RIVER
Big Sandy Opening 9080 14.9 13.8 108 15.7 13.8 114
Blind Bull Sum 8650 26.6 24.8 107 19.5 17.8 110
East Rim Divide 7930 12.1 9.7 125 12.1 11.5 105
Elkhart Park G.S. 9400 12.5 12.9 97 12.1 13.0 93
Gros Ventre Summit 8750 12.7 12.9 98 11.7 12.8 91
Gunsight Pass 9820 13.6 13.0 105 13.4 14.4 93
Indian Creek 9425 29.1 24.3 120 25.1 20.0 126
Kendall R.S. 7740 12.2 10.0 122 13.5 13.3 102
Larsen Creek 9000 10.8 8.6 126 14.8 14.3 103
Loomis Park 8240 17.4 14.6 119 17.3 17.2 101
New Fork Lake 8340 11.1 9.8 113 -M 10.8 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 14.0 11.8 119 16.4 14.0 117
Spring Creek Divide 9000 30.0 25.2 119 -M 24.4 *
Triple Peak 8500 26.4 22.1 119 26.8 25.7 104
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Basin Index (%) 114 106
LOWER GREEN RIVER
Blacks Fork Jct 8869 13.8 7.5 184 15.1 12.4 122
Buck Pasture 9632 20.8 -M * 22.4 -M *
EF Blacks Fork GS 9360 14.0 11.8 119 12.2 11.7 104
Hams Fork 7840 16.2 9.0 180 15.5 11.2 138
Henrys Fork 10182 -M -M * 16.2 -M *
Hewinta 9500 12.2 9.6 127 16.8 13.9 121
Hickerson Park 9122 11.4 6.6 173 13.2 11.0 120
Hole-in-Rock 9168 9.1 6.4 142 12.6 10.5 120
Indian Creek 9425 29.1 24.3 120 25.1 20.0 126
Kelley R.S. 8180 22.0 14.6 151 22.5 16.6 136
Spirit Lk 10235 22.9 13.7 167 22.0 18.5 119
Steel Creek Park 10158 21.3 15.2 140 20.5 16.9 121
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Basin Index (%) 145 123
UPPER BEAR RIVER
Bear River RS 8777 13.5 6.9 196 16.6 12.4 134
Bug Lake 7987 31.0 18.4 168 25.6 18.5 138
Burts Miller Ranch 8000 9.5 2.5 380 14.8 8.2 180
Chalk Creek #1 9171 34.4 23.7 145 32.7 24.0 136
Giveout 6930 15.3 4.8 319 15.9 13.0 122
Hayden Fork 9130 23.2 14.1 165 28.6 21.5 133
Kelley R.S. 8180 22.0 14.6 151 22.5 16.6 136
Lily Lake 9133 15.2 12.7 120 18.0 16.0 112
Monte Cristo 8932 44.8 27.4 164 -M 26.6 *
Salt River Summit 7640 20.9 11.8 177 20.7 16.4 126
Spring Creek Divide 9000 30.0 25.2 119 -M 24.4 *
Trial Lake 9992 38.6 22.2 174 35.3 22.7 156
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Basin Index (%) 162 136
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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.
