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 WEDNESDAY: APRIL 19 , 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 18.6 14.8 126 21.9 21.3 103
Blind Bull Sum 8650 26.9 25.3 106 19.5 18.6 105
Cottonwood Creek 7670 25.7 20.4 126 29.3 26.6 110
East Rim Divide 7930 11.7 9.6 122 12.5 11.7 107
Grand Targhee 9260 48.6 46.8 104 -M 34.5 *
Granite Creek 6770 18.2 12.6 144 16.1 19.4 83
Grassy Lake 7265 36.8 33.0 112 41.2 37.3 110
Gros Ventre Summit 8750 12.8 13.2 97 11.8 13.4 88
Gunsight Pass 9820 14.5 13.5 107 14.1 14.8 95
Lewis Lake Divide 7850 38.8 33.3 117 41.9 35.0 120
Loomis Park 8240 16.9 13.6 124 17.6 17.4 101
Phillips Bench 8200 30.1 26.6 113 31.6 27.4 115
Salt River Summit 7640 20.6 11.0 187 21.0 17.0 124
Snake River Station 6920 18.4 15.4 119 23.9 23.3 103
Somsen Ranch 6800 -M 7.6 * -M 17.4 *
Spring Creek Divide 9000 29.7 25.3 117 -M 24.4 *
Thumb Divide 7980 21.0 16.6 127 20.3 19.5 104
Togwotee Pass 9580 23.2 24.9 93 22.1 26.0 85
Triple Peak 8500 26.4 21.9 121 27.1 26.7 101
Two Ocean Plateau 9240 34.0 32.3 105 29.0 28.4 102
Willow Creek 8080 39.2 28.6 137 38.2 35.1 109
Younts Peak 8350 16.0 15.1 106 14.0 16.2 86
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Basin Index (%) 116 104
MADISON HEADWATERS IN WYOMING
Black Bear 8170 43.7 39.6 110 45.6 38.7 118
Canyon 7870 15.0 -M * 18.2 -M *
Madison Plateau 7750 31.4 23.5 134 31.4 25.8 122
West Yellowstone 6700 15.5 6.8 228 20.1 15.1 133
Whiskey Creek 6800 22.0 15.8 139 27.4 21.3 129
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Basin Index (%) 131 123
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 20.6 23.6 87 19.6 21.9 89
Canyon 7870 15.0 -M * 18.2 -M *
Evening Star 9200 27.6 27.0 102 30.0 30.3 99
Fisher Creek 9100 35.7 35.4 101 36.8 35.2 105
Monument Peak 8850 23.2 22.3 104 25.8 23.4 110
Northeast Entrance 7350 8.9 7.4 120 13.4 13.7 98
Parker Peak 9400 27.6 23.1 119 25.7 21.2 121
Sylvan Lake 8420 20.8 20.9 100 25.4 24.7 103
Thumb Divide 7980 21.0 16.6 127 20.3 19.5 104
Two Ocean Plateau 9240 34.0 32.3 105 29.0 28.4 102
White Mill 8700 26.0 26.0 100 24.6 24.2 102
Wolverine 7650 12.6 8.2 154 13.4 13.1 102
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Basin Index (%) 106 103
WIND RIVER
Burroughs Creek 8750 10.2 -M * 11.5 -M *
Castle Creek 8400 4.5 4.7 96 7.4 9.0 82
Cold Springs 9630 7.4 6.5 114 10.9 9.8 111
Deer Park 9700 24.3 16.0 152 25.7 20.2 127
Hobbs Park 10100 17.1 15.8 108 16.4 14.5 113
Kirwin 9550 10.5 12.0 88 13.8 13.4 103
Little Warm 9370 11.0 10.5 105 13.9 12.6 110
South Pass 9040 19.6 15.8 124 20.8 17.1 122
St. Lawrence Alt 8620 6.6 -M * 11.1 -M *
Togwotee Pass 9580 23.2 24.9 93 22.1 26.0 85
Townsend Creek 8700 12.5 9.6 130 14.4 12.9 112
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Basin Index (%) 112 107
BIGHORN BASIN
Bald Mtn. 9380 19.2 20.0 96 16.1 16.9 95
Bear Trap Meadow 8200 8.2 3.8 216 10.6 9.8 108
Bone Springs Div 9350 16.4 17.8 92 13.1 16.9 78
Grave Springs 8550 9.5 8.4 113 12.1 11.0 110
Kirwin 9550 10.5 12.0 88 13.8 13.4 103
Marquette 8760 9.6 7.8 123 11.0 10.6 104
Middle Powder 7760 12.3 11.4 108 11.0 10.8 102
Owl Creek 8975 6.4 4.6 139 9.5 7.0 136
Powder River Pass 9480 10.1 10.8 94 14.6 14.2 103
Shell Creek 9580 14.4 16.4 88 15.0 15.0 100
Timber Creek 7950 5.5 5.4 102 8.3 8.8 94
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Basin Index (%) 103 101
SHOSHONE RIVER
Blackwater 9780 23.2 25.0 93 23.5 23.8 99
Evening Star 9200 27.6 27.0 102 30.0 30.3 99
Marquette 8760 9.6 7.8 123 11.0 10.6 104
Sylvan Lake 8420 20.8 20.9 100 25.4 24.7 103
Sylvan Road 7120 8.1 10.0 81 15.7 17.6 89
Younts Peak 8350 16.0 15.1 106 14.0 16.2 86
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Basin Index (%) 100 97
POWDER RIVER
Bear Trap Meadow 8200 8.2 3.8 216 10.6 9.8 108
Cloud Peak Reservoir 9860 15.6 15.6 100 15.9 15.0 106
Grave Springs 8550 9.5 8.4 113 12.1 11.0 110
Hansen Sawmill 8360 7.7 5.5 140 10.2 9.8 104
Middle Powder 7760 12.3 11.4 108 11.0 10.8 102
Powder River Pass 9480 10.1 10.8 94 14.6 14.2 103
Soldier Park 8720 7.8 6.8 115 9.7 10.8 90
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Basin Index (%) 114 103
TONGUE RIVER
Big Goose 7990 10.2 8.7 117 11.7 11.0 106
Bone Springs Div 9350 16.4 17.8 92 13.1 16.9 78
Burgess Junction 7880 12.2 11.7 104 14.3 13.4 107
Dome Lake 8880 10.9 11.7 93 12.8 14.5 88
Little Goose 8870 10.3 10.7 96 13.0 13.8 94
Sucker Creek 8880 12.9 13.1 98 17.4 15.4 113
Tie Creek 6870 8.1 4.0 202 13.8 12.5 110
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Basin Index (%) 104 99
BELLE FOURCHE
Blind Park 6890 5.2 3.8 137 12.0 12.2 98
Cole Canyon 5910 5.7 2.4 238 11.3 10.1 112
North Rapid Creek 6130 5.2 3.8 137 10.0 9.8 102
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Basin Index (%) 161 104
CHEYENNE RIVER BASIN
Blind Park 6890 5.2 3.8 137 12.0 12.2 98
North Rapid Creek 6130 5.2 3.8 137 10.0 9.8 102
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Basin Index (%) 137 100
UPPER N. PLATTE
Arapaho Ridge 10976 26.0 23.2 112 25.5 23.4 109
Blackhall Mtn 9839 37.5 32.9 114 39.1 31.8 123
Cinnabar Park 9707 -M 20.3 * 24.1 24.6 98
Columbine 9167 27.1 21.4 127 27.8 26.6 105
Divide Peak 8730 28.2 19.5 145 30.2 23.2 130
Joe Wright 10158 25.8 21.8 118 29.2 28.0 104
Laprele Creek 8390 11.6 8.5 136 14.0 12.8 109
Med Bow 10512 39.6 -M * 36.0 -M *
Never Summer 10323 27.0 21.8 124 19.8 18.4 108
North French Creek 10153 29.8 31.4 95 31.1 29.0 107
Old Battle 9860 43.1 33.4 129 -M 35.8 *
Rawah 9069 13.0 10.8 120 17.9 17.0 105
Sage Creek Basin 7850 24.3 7.8 312 21.2 13.7 155
Sand Lake 10098 29.2 30.2 97 29.2 26.8 109
South Brush Creek 8495 12.3 9.2 134 15.2 14.6 104
Tower 10620 52.6 45.7 115 52.2 41.8 125
Webber Springs 9260 29.1 22.2 131 33.5 27.4 122
Whiskey Park 9020 37.5 26.2 143 36.8 29.4 125
Willow Creek Pass 9523 18.9 14.6 129 18.5 14.6 127
Zirkel 9338 30.3 25.2 120 36.0 33.1 109
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Basin Index (%) 124 115
SWEETWATER
Deer Park 9700 24.3 16.0 152 25.7 20.2 127
Larsen Creek 9000 10.5 8.6 122 15.0 14.7 102
South Pass 9040 19.6 15.8 124 20.8 17.1 122
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Basin Index (%) 135 118
LOWER N. PLATTE
Casper Mtn. 7920 14.2 14.3 99 15.2 15.4 99
Laprele Creek 8390 11.6 8.5 136 14.0 12.8 109
Reno Hill 8430 16.0 14.1 113 17.7 16.8 105
Windy Peak 7915 10.7 6.8 157 13.2 11.4 116
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Basin Index (%) 120 107
LARAMIE RIVER
Brooklyn Lake 10250 24.5 22.0 111 26.8 23.6 114
Cinnabar Park 9707 -M 20.3 * 24.1 24.6 98
Crow Creek 8335 2.9 3.8 76 9.6 11.8 81
Deadman Hill 10239 19.8 17.4 114 19.5 19.6 99
Rawah 9069 13.0 10.8 120 17.9 17.0 105
Roach 9740 17.4 16.4 106 21.8 20.3 107
Windy Peak 7915 10.7 6.8 157 13.2 11.4 116
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Basin Index (%) 114 104
S. PLATTE
Crow Creek 8335 2.9 3.8 76 9.6 11.8 81
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Basin Index (%) 76 81
LITTLE SNAKE RIVER
Battle Mountain 7498 13.9 6.6 211 23.3 16.2 144
Divide Peak 8730 28.2 19.5 145 30.2 23.2 130
Elk River 8739 24.8 15.2 163 28.6 20.7 138
Elkhead Divide 8800 29.9 -M * 32.2 -M *
Little Snake River 8928 37.0 24.6 150 44.0 34.3 128
Old Battle 9860 43.1 33.4 129 -M 35.8 *
Sage Creek Basin 7850 24.3 7.8 312 21.2 13.7 155
Sandstone RS 8152 22.0 9.9 222 26.0 18.8 138
Whiskey Park 9020 37.5 26.2 143 36.8 29.4 125
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Basin Index (%) 161 134
UPPER GREEN RIVER
Big Sandy Opening 9080 15.2 13.6 112 16.1 13.9 116
Blind Bull Sum 8650 26.9 25.3 106 19.5 18.6 105
East Rim Divide 7930 11.7 9.6 122 12.5 11.7 107
Elkhart Park G.S. 9400 12.6 12.8 98 12.3 13.0 95
Gros Ventre Summit 8750 12.8 13.2 97 11.8 13.4 88
Gunsight Pass 9820 14.5 13.5 107 14.1 14.8 95
Indian Creek 9425 29.7 24.8 120 25.5 20.3 126
Kendall R.S. 7740 12.2 9.8 124 13.8 13.7 101
Larsen Creek 9000 10.5 8.6 122 15.0 14.7 102
Loomis Park 8240 16.9 13.6 124 17.6 17.4 101
New Fork Lake 8340 10.9 9.6 114 -M 11.0 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 14.4 10.8 133 16.7 14.2 118
Spring Creek Divide 9000 29.7 25.3 117 -M 24.4 *
Triple Peak 8500 26.4 21.9 121 27.1 26.7 101
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Basin Index (%) 115 105
LOWER GREEN RIVER
Blacks Fork Jct 8869 12.9 7.4 174 15.3 13.0 118
Buck Pasture 9632 20.5 -M * 22.6 -M *
EF Blacks Fork GS 9360 12.9 11.1 116 12.4 12.2 102
Hams Fork 7840 15.2 7.7 197 15.8 11.4 139
Henrys Fork 10182 -M -M * 16.2 -M *
Hewinta 9500 11.8 8.4 140 17.1 14.4 119
Hickerson Park 9122 10.1 5.7 177 13.2 11.2 118
Hole-in-Rock 9168 8.8 5.8 152 12.7 10.8 118
Indian Creek 9425 29.7 24.8 120 25.5 20.3 126
Kelley R.S. 8180 22.0 14.4 153 22.9 17.0 135
Spirit Lk 10235 22.3 12.8 174 22.1 19.0 116
Steel Creek Park 10158 21.2 15.8 134 20.8 17.2 121
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Basin Index (%) 147 121
UPPER BEAR RIVER
Bear River RS 8777 11.5 4.0 288 16.6 12.8 130
Bug Lake 7987 31.1 17.8 175 25.8 18.8 137
Burts Miller Ranch 8000 7.5 .3 2500* 14.8 8.6 172
Chalk Creek #1 9171 34.3 23.4 147 32.9 24.0 137
Giveout 6930 14.8 3.1 477 16.3 13.1 124
Hayden Fork 9130 22.4 12.5 179 28.7 21.8 132
Kelley R.S. 8180 22.0 14.4 153 22.9 17.0 135
Lily Lake 9133 14.9 11.6 128 18.2 16.0 114
Monte Cristo 8932 46.1 27.0 171 41.9 27.0 155
Salt River Summit 7640 20.6 11.0 187 21.0 17.0 124
Spring Creek Divide 9000 29.7 25.3 117 -M 24.4 *
Trial Lake 9992 38.1 22.2 172 35.4 23.2 153
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Basin Index (%) 170 138
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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.
