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 28 , 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 18.5 11.4 162 22.5 22.2 101
Blind Bull Sum 8650 27.7 24.8 112 -M 19.2 *
Cottonwood Creek 7670 26.8 18.5 145 31.1 27.8 112
East Rim Divide 7930 10.1 7.8 129 12.9 12.2 106
Grand Targhee 9260 50.5 47.6 106 -M 35.8 *
Granite Creek 6770 16.6 10.4 160 16.2 20.4 79
Grassy Lake 7265 37.3 30.5 122 42.3 38.0 111
Gros Ventre Summit 8750 12.8 12.8 100 11.9 14.2 84
Gunsight Pass 9820 15.3 13.2 116 14.8 16.0 92
Lewis Lake Divide 7850 39.2 31.3 125 42.8 36.3 118
Loomis Park 8240 16.2 11.8 137 18.0 17.7 102
Phillips Bench 8200 30.5 27.6 111 32.1 28.4 113
Salt River Summit 7640 20.8 9.4 221 21.8 17.6 124
Snake River Station 6920 17.6 12.0 147 24.7 24.1 102
Somsen Ranch 6800 18.7 3.3 567 23.2 17.8 130
Spring Creek Divide 9000 31.5 25.3 125 -M 25.2 *
Thumb Divide 7980 21.0 14.8 142 20.7 20.5 101
Togwotee Pass 9580 24.2 25.2 96 23.3 26.7 87
Triple Peak 8500 27.2 19.6 139 28.4 27.6 103
Two Ocean Plateau 9240 35.2 33.0 107 29.9 28.9 103
Willow Creek 8080 40.2 27.9 144 40.1 36.5 110
Younts Peak 8350 15.6 14.9 105 14.5 16.8 86
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Basin Index (%) 128 105
MADISON HEADWATERS IN WYOMING
Black Bear 8170 45.2 40.2 112 46.9 39.8 118
Canyon 7870 15.2 -M * 18.8 -M *
Madison Plateau 7750 33.5 23.1 145 32.0 27.2 118
West Yellowstone 6700 13.8 3.1 445 20.4 15.6 131
Whiskey Creek 6800 22.4 14.8 151 27.7 22.2 125
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Basin Index (%) 142 121
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 21.2 24.0 88 20.2 22.4 90
Canyon 7870 15.2 -M * 18.8 -M *
Evening Star 9200 28.3 27.0 105 31.2 30.9 101
Fisher Creek 9100 36.6 36.0 102 37.9 36.2 105
Monument Peak 8850 24.0 22.4 107 26.7 24.4 109
Northeast Entrance 7350 7.8 3.9 200 14.0 14.2 99
Parker Peak 9400 29.8 23.4 127 26.6 22.0 121
Sylvan Lake 8420 21.3 20.6 103 26.1 25.9 101
Thumb Divide 7980 21.0 14.8 142 20.7 20.5 101
Two Ocean Plateau 9240 35.2 33.0 107 29.9 28.9 103
White Mill 8700 26.8 25.8 104 25.4 25.0 102
Wolverine 7650 12.7 5.0 254 14.3 13.4 107
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Basin Index (%) 112 103
WIND RIVER
Burroughs Creek 8750 8.9 -M * 11.8 -M *
Castle Creek 8400 3.2 1.4 229 8.0 9.4 85
Cold Springs 9630 7.4 5.2 142 12.0 11.1 108
Deer Park 9700 26.4 15.4 171 28.6 21.0 136
Hobbs Park 10100 19.6 16.2 121 19.5 15.8 123
Kirwin 9550 12.0 12.2 98 14.6 14.0 104
Little Warm 9370 11.3 9.4 120 14.4 13.0 111
South Pass 9040 -M 15.0 * -M 18.0 *
St. Lawrence Alt 8620 7.9 -M * 12.6 -M *
Togwotee Pass 9580 24.2 25.2 96 23.3 26.7 87
Townsend Creek 8700 14.3 9.4 152 16.8 13.3 126
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Basin Index (%) 125 110
BIGHORN BASIN
Bald Mtn. 9380 20.3 20.6 99 17.1 18.2 94
Bear Trap Meadow 8200 6.9 3.3 209 10.9 10.6 103
Bone Springs Div 9350 17.8 17.4 102 13.8 18.0 77
Grave Springs 8550 9.6 8.6 112 12.7 11.8 108
Kirwin 9550 12.0 12.2 98 14.6 14.0 104
Marquette 8760 10.0 8.1 123 12.1 11.6 104
Middle Powder 7760 12.5 12.1 103 11.3 11.9 95
Owl Creek 8975 4.4 2.2 200 10.2 8.2 124
Powder River Pass 9480 10.3 10.6 97 15.5 15.2 102
Shell Creek 9580 15.3 16.4 93 16.0 15.6 103
Timber Creek 7950 6.1 3.3 185 9.2 9.6 96
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Basin Index (%) 109 99
SHOSHONE RIVER
Blackwater 9780 24.1 25.2 96 24.4 24.7 99
Evening Star 9200 28.3 27.0 105 31.2 30.9 101
Marquette 8760 10.0 8.1 123 12.1 11.6 104
Sylvan Lake 8420 21.3 20.6 103 26.1 25.9 101
Sylvan Road 7120 6.1 6.5 94 16.3 17.9 91
Younts Peak 8350 15.6 14.9 105 14.5 16.8 86
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Basin Index (%) 103 97
POWDER RIVER
Bear Trap Meadow 8200 6.9 3.3 209 10.9 10.6 103
Cloud Peak Reservoir 9860 15.8 15.8 100 16.7 16.4 102
Grave Springs 8550 9.6 8.6 112 12.7 11.8 108
Hansen Sawmill 8360 7.9 4.4 180 10.5 10.4 101
Middle Powder 7760 12.5 12.1 103 11.3 11.9 95
Powder River Pass 9480 10.3 10.6 97 15.5 15.2 102
Soldier Park 8720 7.8 5.4 144 10.0 11.2 89
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Basin Index (%) 118 100
TONGUE RIVER
Big Goose 7990 10.4 8.6 121 12.2 12.5 98
Bone Springs Div 9350 17.8 17.4 102 13.8 18.0 77
Burgess Junction 7880 13.3 12.0 111 15.1 14.6 103
Dome Lake 8880 11.6 10.8 107 13.4 15.6 86
Little Goose 8870 10.6 10.8 98 13.7 15.5 88
Sucker Creek 8880 13.7 13.1 105 18.4 16.8 110
Tie Creek 6870 7.6 2.6 292 14.5 13.6 107
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Basin Index (%) 113 95
BELLE FOURCHE
Blind Park 6890 3.6 1.8 200 12.8 13.2 97
Cole Canyon 5910 4.8 .5 960* 12.1 11.2 108
North Rapid Creek 6130 3.3 1.6 206 10.6 10.7 99
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Basin Index (%) 300 101
CHEYENNE RIVER BASIN
Blind Park 6890 3.6 1.8 200 12.8 13.2 97
North Rapid Creek 6130 3.3 1.6 206 10.6 10.7 99
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Basin Index (%) 203 98
UPPER N. PLATTE
Arapaho Ridge 10976 28.5 23.6 121 27.4 25.0 110
Blackhall Mtn 9839 39.4 32.0 123 41.2 33.6 123
Cinnabar Park 9707 -M 19.9 * 25.6 25.8 99
Columbine 9167 26.5 19.5 136 29.4 28.6 103
Divide Peak 8730 30.0 17.1 175 31.7 24.6 129
Joe Wright 10158 27.7 22.5 123 31.0 29.6 105
Laprele Creek 8390 11.8 6.8 174 15.4 14.3 108
Med Bow 10512 42.0 -M * 38.4 -M *
Never Summer 10323 28.0 22.0 127 21.1 19.2 110
North French Creek 10153 32.0 31.4 102 33.1 32.0 103
Old Battle 9860 45.0 35.8 126 44.8 37.5 119
Rawah 9069 12.9 7.8 165 19.3 18.8 103
Sage Creek Basin 7850 22.4 1.5 1493 22.0 14.4 153
Sand Lake 10098 31.2 31.1 100 31.5 28.7 110
South Brush Creek 8495 12.1 7.8 155 16.3 15.7 104
Tower 10620 52.7 46.2 114 54.2 45.0 120
Webber Springs 9260 30.8 22.0 140 35.3 28.6 123
Whiskey Park 9020 39.0 26.6 147 38.8 31.6 123
Willow Creek Pass 9523 20.4 15.3 133 19.6 15.7 125
Zirkel 9338 30.8 24.8 124 37.7 34.4 110
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Basin Index (%) 132 114
SWEETWATER
Deer Park 9700 26.4 15.4 171 28.6 21.0 136
Larsen Creek 9000 11.7 4.6 254 16.8 15.6 108
South Pass 9040 -M 15.0 * -M 18.0 *
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Basin Index (%) 190 124
LOWER N. PLATTE
Casper Mtn. 7920 13.3 13.2 101 15.6 17.4 90
Laprele Creek 8390 11.8 6.8 174 15.4 14.3 108
Reno Hill 8430 17.0 13.7 124 19.3 18.1 107
Windy Peak 7915 11.3 5.0 226 14.0 12.4 113
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Basin Index (%) 138 103
LARAMIE RIVER
Brooklyn Lake 10250 26.3 23.2 113 28.7 24.9 115
Cinnabar Park 9707 -M 19.9 * 25.6 25.8 99
Crow Creek 8335 1.7 .9 189 10.6 12.3 86
Deadman Hill 10239 21.5 19.6 110 21.4 20.8 103
Rawah 9069 12.9 7.8 165 19.3 18.8 103
Roach 9740 18.4 16.0 115 23.4 21.3 110
Windy Peak 7915 11.3 5.0 226 14.0 12.4 113
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Basin Index (%) 127 105
S. PLATTE
Crow Creek 8335 1.7 .9 189 10.6 12.3 86
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Basin Index (%) 189 86
LITTLE SNAKE RIVER
Battle Mountain 7498 11.8 .8 1475* 24.2 17.3 140
Divide Peak 8730 30.0 17.1 175 31.7 24.6 129
Elk River 8739 24.5 13.0 188 30.1 22.0 137
Elkhead Divide 8800 30.4 -M * 33.7 -M *
Little Snake River 8928 38.6 23.9 162 45.8 36.4 126
Old Battle 9860 45.0 35.8 126 44.8 37.5 119
Sage Creek Basin 7850 22.4 1.5 1493 22.0 14.4 153
Sandstone RS 8152 20.3 6.8 299 27.0 19.2 141
Whiskey Park 9020 39.0 26.6 147 38.8 31.6 123
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Basin Index (%) 185 130
UPPER GREEN RIVER
Big Sandy Opening 9080 16.2 12.6 129 17.3 14.8 117
Blind Bull Sum 8650 27.7 24.8 112 -M 19.2 *
East Rim Divide 7930 10.1 7.8 129 12.9 12.2 106
Elkhart Park G.S. 9400 12.7 11.8 108 13.0 13.8 94
Gros Ventre Summit 8750 12.8 12.8 100 11.9 14.2 84
Gunsight Pass 9820 15.3 13.2 116 14.8 16.0 92
Indian Creek 9425 30.4 23.0 132 26.4 21.0 126
Kendall R.S. 7740 11.2 5.6 200 14.2 14.2 100
Larsen Creek 9000 11.7 4.6 254 16.8 15.6 108
Loomis Park 8240 16.2 11.8 137 18.0 17.7 102
New Fork Lake 8340 10.4 6.8 153 -M 11.8 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 13.5 8.2 165 17.2 14.9 115
Spring Creek Divide 9000 31.5 25.3 125 -M 25.2 *
Triple Peak 8500 27.2 19.6 139 28.4 27.6 103
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Basin Index (%) 131 105
LOWER GREEN RIVER
Blacks Fork Jct 8869 14.0 5.0 280 16.3 14.1 116
Buck Pasture 9632 21.7 -M * 23.8 -M *
EF Blacks Fork GS 9360 13.6 8.2 166 13.6 13.2 103
Hams Fork 7840 13.6 4.8 283 16.2 11.8 137
Henrys Fork 10182 -M -M * 17.0 -M *
Hewinta 9500 13.0 6.6 197 18.0 15.6 115
Hickerson Park 9122 10.1 4.4 230 14.1 12.0 118
Hole-in-Rock 9168 10.1 4.0 252 13.4 11.6 116
Indian Creek 9425 30.4 23.0 132 26.4 21.0 126
Kelley R.S. 8180 22.3 12.4 180 23.7 17.8 133
Spirit Lk 10235 23.3 12.6 185 23.5 19.4 121
Steel Creek Park 10158 22.7 16.9 134 22.3 18.3 122
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Basin Index (%) 177 121
UPPER BEAR RIVER
Bear River RS 8777 11.3 1.4 807 17.5 13.8 127
Bug Lake 7987 31.4 15.5 203 26.8 19.2 140
Burts Miller Ranch 8000 6.9 .0 * 15.6 8.7 179
Chalk Creek #1 9171 36.0 21.4 168 34.2 25.3 135
Giveout 6930 14.0 .0 * 16.9 13.6 124
Hayden Fork 9130 24.1 10.2 236 30.1 22.6 133
Kelley R.S. 8180 22.3 12.4 180 23.7 17.8 133
Lily Lake 9133 15.6 10.2 153 18.8 17.8 106
Monte Cristo 8932 47.5 25.8 184 42.7 27.8 154
Salt River Summit 7640 20.8 9.4 221 21.8 17.6 124
Spring Creek Divide 9000 31.5 25.3 125 -M 25.2 *
Trial Lake 9992 40.9 23.0 178 36.7 24.4 150
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Basin Index (%) 196 137
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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.
