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: MAY 6 , 2017
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BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Median Median Current Average Avg
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WYOMING
SNAKE RIVER
Base Camp 7030 16.9 6.6 256 42.2 23.3 181
Black Bear 8170 50.6 37.1 136 59.8 42.5 141
Blind Bull Sum 8650 48.5 22.7 214 39.1 21.8 179
Cottonwood Creek 7670 27.1 13.7 198 44.0 28.1 157
East Rim Divide 7930 5.2 7.1 73 22.5 13.2 170
Grand Targhee 9260 59.3 46.2 128 51.2 35.5 144
Granite Creek 6770 17.9 7.1 252 38.4 21.7 177
Grassy Lake 7265 37.2 27.3 136 61.5 39.9 154
Gros Ventre Summit 8750 19.7 10.5 188 26.5 15.0 177
Gunsight Pass 9820 25.8 11.7 221 28.3 16.4 173
Lewis Lake Divide 7850 45.9 29.4 156 59.9 39.2 153
Phillips Bench 8200 40.3 23.9 169 50.8 31.3 162
Salt River Summit 7760 14.7 6.7 219 31.9 18.7 171
Snake River Station 6920 9.9 4.6 215 39.2 25.2 156
Spring Creek Divide 9000 44.9 24.1 186 44.6 26.7 167
Thumb Divide 7980 16.5 10.0 165 30.5 21.4 143
Togwotee Pass 9580 36.3 24.9 146 43.1 27.9 154
Two Ocean Plateau 9240 -M 29.8 * -M 30.7 *
Willow Creek 8380 27.3 21.8 125 57.6 38.5 150
Younts Peak 8350 19.1 15.7 122 33.6 18.1 186
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Basin Index (%) 160 160
MADISON-GALLATIN
Black Bear 8170 50.6 37.1 136 59.8 42.5 141
Canyon 7870 16.5 8.5 194 28.9 18.4 157
Madison Plateau 7750 27.8 20.7 134 40.0 29.5 136
West Yellowstone 6700 .0 .0 * 25.9 16.3 159
Whiskey Creek 6800 10.5 12.4 85 29.9 22.7 132
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Basin Index (%) 134 143
YELLOWSTONE
Beartooth Lake 9360 35.9 22.8 157 31.8 22.4 142
Burnt Mtn 5880 .0 .0 * 18.5 16.4 113
Canyon 7870 16.5 8.5 194 28.9 18.4 157
Cole Creek 7850 16.1 16.9 95 14.2 16.9 84
Evening Star 9200 40.0 25.0 160 49.3 31.1 159
Fisher Creek 9100 47.5 33.2 143 52.7 35.8 147
Northeast Entrance 7350 .0 1.0 0 23.1 14.1 164
Parker Peak 9400 42.6 21.5 198 40.1 20.6 195
Sylvan Lake 8420 25.3 18.5 137 42.0 25.6 164
Thumb Divide 7980 16.5 10.0 165 30.5 21.4 143
Two Ocean Plateau 9240 -M 29.8 * -M 30.7 *
White Mill 8700 40.7 24.1 169 40.0 26.8 149
Wolverine 7650 .0 .6 0* 23.8 14.1 169
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Basin Index (%) 154 150
WIND RIVER
Burroughs Creek 8750 16.9 -M * 29.3 -M *
Castle Creek 8400 3.8 -M * 17.3 -M *
Cold Springs 9630 13.5 1.5 900 22.4 13.0 172
Deer Park 9700 35.7 14.9 240 43.4 24.1 180
Hobbs Park 10100 34.9 15.9 219 34.6 17.3 200
Kirwin 9550 24.3 10.7 227 29.3 14.4 203
Little Warm 9370 18.0 7.5 240 27.2 15.8 172
Owl Creek 8975 5.3 .6 883 15.3 8.3 184
South Pass 9040 33.0 13.4 246 33.8 20.9 162
St. Lawrence Alt 8620 7.3 1.6 456 20.6 12.0 172
Togwotee Pass 9580 36.3 24.9 146 43.1 27.9 154
Townsend Creek 8700 18.3 5.7 321 28.2 15.4 183
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Basin Index (%) 234 176
BIGHORN BASIN
Bald Mtn. 9380 22.8 20.4 112 21.5 20.2 106
Bear Trap Meadow 8200 5.1 .2 2550* 14.9 11.1 134
Bone Springs Div 9350 23.4 16.3 144 21.8 18.8 116
Grave Springs 8550 10.8 8.8 123 13.7 13.5 101
Kirwin 9550 24.3 10.7 227 29.3 14.4 203
Marquette 8760 19.6 -M * 23.9 -M *
Middle Powder 7760 12.6 11.2 112 14.2 14.7 97
Owl Creek 8975 5.3 .6 883 15.3 8.3 184
Powder River Pass 9480 10.7 9.1 118 18.1 15.6 116
Shell Creek 9580 19.6 16.3 120 18.4 16.8 110
Timber Creek 7950 5.6 2.1 267 15.0 10.6 142
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Basin Index (%) 146 127
SHOSHONE RIVER
Blackwater 9780 41.8 25.7 163 46.4 24.1 193
Evening Star 9200 40.0 25.0 160 49.3 31.1 159
Marquette 8760 19.6 -M * 23.9 -M *
Sylvan Road 7120 .0 3.3 0 32.3 18.9 171
Younts Peak 8350 19.1 15.7 122 33.6 18.1 186
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Basin Index (%) 145 175
POWDER RIVER
Bear Trap Meadow 8200 5.1 .2 2550* 14.9 11.1 134
Cloud Peak Reservoir 9860 20.9 16.4 127 26.4 17.3 153
Grave Springs 8550 10.8 8.8 123 13.7 13.5 101
Hansen Sawmill 8360 14.1 1.6 881 18.9 11.3 167
Middle Powder 7760 12.6 11.2 112 14.2 14.7 97
Powder River Pass 9480 10.7 9.1 118 18.1 15.6 116
Soldier Park 8720 16.6 -M * 20.5 -M *
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Basin Index (%) 157 127
TONGUE RIVER
Big Goose 7990 14.2 9.9 143 20.1 14.9 135
Bone Springs Div 9350 23.4 16.3 144 21.8 18.8 116
Burgess Junction 7880 12.7 11.6 109 15.9 15.3 104
Dome Lake 8880 19.3 11.3 171 22.0 17.0 129
Little Goose 8870 17.9 -M * 24.0 -M *
Sucker Creek 8880 15.1 12.0 126 19.1 18.0 106
Tie Creek 6870 2.7 2.2 123 19.7 15.0 131
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Basin Index (%) 138 120
BELLE FOURCHE
Cole Canyon 5910 .1 .0 * 12.3 12.7 97
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Basin Index (%) * 97
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 11.6 14.9 78
North Rapid Creek 6130 .0 .0 * 10.0 12.8 78
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Basin Index (%) * 78
UPPER N. PLATTE
Arapaho Ridge 10960 25.6 22.3 115 29.8 26.8 111
Blackhall Mtn 9820 36.5 -M * 42.2 -M *
Columbine 9160 10.7 15.8 68 32.2 29.2 110
Divide Peak 8880 10.2 16.8 61 26.1 24.9 105
Joe Wright 10120 18.5 22.8 81 33.4 30.7 109
Laprele Creek 8375 3.8 4.9 78 15.4 15.5 99
Med Bow 10500 39.3 -M * 41.2 -M *
North French Creek 10130 27.8 32.8 85 34.0 31.5 108
Never Summer 10280 24.7 22.0 112 22.7 -M *
Old Battle 10000 40.0 35.3 113 43.3 40.0 108
Rawah 9020 4.0 4.2 95 20.7 17.7 117
Sage Creek Basin 7850 -M .4 * 17.9 16.6 108
Sand Lake 10050 33.5 31.7 106 32.3 29.7 109
South Brush Creek 8440 .6 7.1 8 16.4 18.4 89
Tower 10500 44.7 51.2 87 51.0 45.7 112
Webber Springs 9250 22.7 20.7 110 37.0 30.5 121
Willow Creek Pass 9540 18.8 14.4 131 20.5 16.1 127
Zirkel 9340 23.5 20.5 115 46.8 31.7 148
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Basin Index (%) 96 113
SWEETWATER
Deer Park 9700 35.7 14.9 240 43.4 24.1 180
Larsen Creek 9000 9.3 7.7 121 25.9 -M *
South Pass 9040 33.0 13.4 246 33.8 20.9 162
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Basin Index (%) 217 172
LOWER N. PLATTE
Casper Mtn. 7900 12.1 12.0 101 18.8 18.8 100
Laprele Creek 8375 3.8 4.9 78 15.4 15.5 99
Reno Hill 8400 12.3 11.9 103 19.1 19.5 98
Windy Peak 7900 1.7 2.4 71 14.0 13.4 104
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Basin Index (%) 96 100
LARAMIE RIVER
Brooklyn Lake 10240 20.6 22.5 92 26.8 25.3 106
Cinnabar Park 9574 13.5 18.2 74 26.8 27.7 97
Crow Creek 8330 .0 .0 * 12.4 13.9 89
Deadman Hill 10220 22.1 19.0 116 24.9 21.2 117
Rawah 9020 4.0 4.2 95 20.7 17.7 117
Roach 9700 16.0 16.8 95 25.2 22.8 111
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Basin Index (%) 94 106
S. PLATTE
Black Mountain 8920 6.3 -M * 16.4 -M *
Crow Creek 8330 .0 .0 * 12.4 13.9 89
Deadman Hill 10220 22.1 19.0 116 24.9 21.2 117
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Basin Index (%) 116* 106
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * 19.4 17.5 111
Divide Peak 8880 10.2 16.8 61 26.1 24.9 105
Elk River 8700 2.4 10.7 22 23.2 23.3 100
Little Snake River 8915 21.9 21.2 103 43.5 33.5 130
Old Battle 10000 40.0 35.3 113 43.3 40.0 108
Sage Creek Basin 7850 -M .4 * 17.9 16.6 108
Sandstone RS 8150 -M 3.6 * 19.3 21.2 91
Whiskey Park 8950 23.9 27.1 88 35.2 32.2 109
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Basin Index (%) 89 109
UPPER GREEN RIVER
Big Sandy Opening 9080 20.7 8.8 235 25.7 15.6 165
Blind Bull Sum 8650 48.5 22.7 214 39.1 21.8 179
East Rim Divide 7930 5.2 7.1 73 22.5 13.2 170
Elkhart Park G.S. 9400 19.8 10.1 196 26.3 15.4 171
Gros Ventre Summit 8750 19.7 10.5 188 26.5 15.0 177
Gunsight Pass 9820 25.8 11.7 221 28.3 16.4 173
Kendall R.S. 7740 10.7 1.4 764 30.6 15.8 194
Loomis Park 8240 20.9 8.9 235 34.6 19.3 179
New Fork Lake 8340 9.0 4.5 200 19.8 12.5 158
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 11.9 8.0 149 29.2 15.9 184
Spring Creek Divide 9000 44.9 24.1 186 44.6 26.7 167
Triple Peak 8500 35.1 15.7 224 44.9 28.5 158
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Basin Index (%) 204 172
LOWER GREEN RIVER
Blacks Fork Jct 8869 2.0 -M * 18.8 -M *
Buck Pasture 9632 15.0 -M * 27.3 -M *
EF Blacks Fork GS 9360 10.4 -M * 21.6 -M *
Hams Fork 7840 5.4 .7 771* 23.9 13.4 178
Hewinta 9500 4.9 3.7 132 20.9 16.7 125
Hickerson Park 9122 .2 2.2 9 14.9 12.4 120
Hole-in-Rock 9168 .6 1.3 46 15.7 12.0 131
Indian Creek 9425 42.7 21.5 199 45.1 25.5 177
Kelley R.S. 8180 -M 9.5 * 33.7 20.6 164
Spirit Lk 10235 14.4 -M * 20.8 -M *
Steel Creek Park 10158 21.5 17.5 123 25.2 19.7 128
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Basin Index (%) 161* 149
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 21.3 -M *
Bug Lake 7987 31.6 13.1 241 37.7 22.2 170
Burts Miller Ranch 8000 .0 -M * 11.9 -M *
Chalk Creek #1 9171 33.7 22.8 148 41.0 29.2 140
Hayden Fork 9130 11.2 7.6 147 33.2 24.4 136
Kelley R.S. 8180 -M 9.5 * 33.7 20.6 164
Lily Lake 9133 10.2 8.6 119 23.0 20.1 114
Monte Cristo 8932 37.9 24.0 158 44.6 30.0 149
Salt River Summit 7760 14.7 6.7 219 31.9 18.7 171
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Basin Index (%) 168 148
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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.
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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.