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 27 , 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 2.9 .0 * 43.3 25.2 172
Black Bear 8170 41.7 29.9 139 61.9 45.6 136
Blind Bull Sum 8650 -M 15.8 * 39.9 23.9 167
Cottonwood Creek 7670 12.9 .3 4300* 46.0 30.9 149
East Rim Divide 7930 .0 .0 * 23.7 14.7 161
Grand Targhee 9260 52.4 41.1 127 53.3 38.1 140
Granite Creek 6770 .1 .0 * 38.9 23.6 165
Grassy Lake 7265 18.9 10.3 183 62.9 42.9 147
Gros Ventre Summit 8750 9.8 .9 1089* 27.4 16.6 165
Gunsight Pass 9820 18.5 5.8 319 30.2 18.2 166
Lewis Lake Divide 7850 29.3 16.7 175 60.4 42.0 144
Phillips Bench 8200 26.4 13.6 194 51.7 33.6 154
Salt River Summit 7760 .1 .0 * 32.8 20.5 160
Snake River Station 6920 .0 .0 * 40.0 27.2 147
Spring Creek Divide 9000 33.7 15.1 223 46.5 28.7 162
Thumb Divide 7980 .1 .0 * 31.5 23.4 135
Togwotee Pass 9580 31.1 21.7 143 44.9 30.5 147
Two Ocean Plateau 9240 -M 27.4 * -M 33.8 *
Willow Creek 8380 -M 8.6 * 60.0 41.9 143
Younts Peak 8350 .0 8.3 0 34.1 20.3 168
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Basin Index (%) 170* 151
MADISON-GALLATIN
Black Bear 8170 41.7 29.9 139 61.9 45.6 136
Canyon 7870 3.4 .0 * 29.8 20.5 145
Madison Plateau 7750 14.6 10.7 136 41.5 32.4 128
West Yellowstone 6700 .0 .0 * 26.9 18.1 149
Whiskey Creek 6800 .0 1.1 0* 31.1 25.0 124
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Basin Index (%) 143* 135
YELLOWSTONE
Beartooth Lake 9360 32.2 19.8 163 33.2 24.8 134
Burnt Mtn 5880 .0 .0 * 23.7 20.4 116
Canyon 7870 3.4 .0 * 29.8 20.5 145
Cole Creek 7850 14.1 12.5 113 19.3 20.6 94
Evening Star 9200 33.7 20.9 161 51.1 34.4 149
Fisher Creek 9100 46.0 30.2 152 53.7 39.4 136
Northeast Entrance 7350 .0 .0 * 23.8 16.2 147
Parker Peak 9400 31.8 17.4 183 41.4 23.3 178
Sylvan Lake 8420 12.7 11.4 111 43.6 28.6 152
Thumb Divide 7980 .1 .0 * 31.5 23.4 135
Two Ocean Plateau 9240 -M 27.4 * -M 33.8 *
White Mill 8700 29.2 20.0 146 40.6 29.8 136
Wolverine 7650 -M .0 * 24.7 16.1 153
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Basin Index (%) 154 140
WIND RIVER
Burroughs Creek 8750 3.8 -M * 29.7 -M *
Castle Creek 8400 .2 -M * 19.4 -M *
Cold Springs 9630 4.1 .0 * 24.6 15.0 164
Deer Park 9700 32.0 7.0 457 47.8 26.8 178
Hobbs Park 10100 30.7 9.6 320 38.0 20.0 190
Kirwin 9550 17.9 5.0 358 31.0 16.5 188
Little Warm 9370 9.1 .0 * 28.2 18.0 157
Owl Creek 8975 .0 .0 * 17.4 10.3 169
South Pass 9040 27.4 1.5 1827* 37.4 23.2 161
St. Lawrence Alt 8620 .2 .0 * 23.4 14.1 166
Togwotee Pass 9580 31.1 21.7 143 44.9 30.5 147
Townsend Creek 8700 11.4 .0 * 31.6 17.8 178
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Basin Index (%) 366* 169
BIGHORN BASIN
Bald Mtn. 9380 20.2 16.3 124 23.3 23.0 101
Bear Trap Meadow 8200 .0 .0 * 17.0 13.5 126
Bone Springs Div 9350 16.3 11.8 138 23.4 21.8 107
Grave Springs 8550 1.9 .0 * 15.4 15.9 97
Kirwin 9550 17.9 5.0 358 31.0 16.5 188
Marquette 8760 14.5 -M * 26.6 -M *
Middle Powder 7760 .0 .0 * 15.5 17.0 91
Owl Creek 8975 .0 .0 * 17.4 10.3 169
Powder River Pass 9480 .9 .2 450* 19.2 18.2 105
Shell Creek 9580 13.1 12.6 104 19.7 19.4 102
Timber Creek 7950 .6 .0 * 19.1 13.0 147
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Basin Index (%) 154* 119
SHOSHONE RIVER
Blackwater 9780 36.5 22.7 161 48.3 26.9 180
Evening Star 9200 33.7 20.9 161 51.1 34.4 149
Marquette 8760 14.5 -M * 26.6 -M *
Sylvan Road 7120 .0 .0 * 33.5 20.9 160
Younts Peak 8350 .0 8.3 0 34.1 20.3 168
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Basin Index (%) 135 163
POWDER RIVER
Bear Trap Meadow 8200 .0 .0 * 17.0 13.5 126
Cloud Peak Reservoir 9860 17.2 10.3 167 28.7 20.7 139
Grave Springs 8550 1.9 .0 * 15.4 15.9 97
Hansen Sawmill 8360 3.6 .0 * 18.9 13.8 137
Middle Powder 7760 .0 .0 * 15.5 17.0 91
Powder River Pass 9480 .9 .2 450* 19.2 18.2 105
Soldier Park 8720 5.2 -M * 22.7 -M *
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Basin Index (%) 225* 116
TONGUE RIVER
Big Goose 7990 6.3 .0 * 21.6 18.0 120
Bone Springs Div 9350 16.3 11.8 138 23.4 21.8 107
Burgess Junction 7880 4.2 3.0 140 17.7 17.7 100
Dome Lake 8880 12.6 .8 1575* 25.1 19.9 126
Little Goose 8870 10.1 -M * 26.1 -M *
Sucker Creek 8880 9.4 4.0 235 21.1 21.1 100
Tie Creek 6870 .1 .0 * 24.8 18.3 136
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Basin Index (%) 249* 114
BELLE FOURCHE
Cole Canyon 5910 .0 .0 * 14.3 16.0 89
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Basin Index (%) * 89
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 14.8 17.8 83
North Rapid Creek 6130 .0 .0 * 13.1 15.5 85
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Basin Index (%) * 84
UPPER N. PLATTE
Arapaho Ridge 10960 20.6 12.0 172 33.1 28.9 115
Blackhall Mtn 9820 28.5 -M * 44.9 -M *
Columbine 9160 .0 .0 * 35.1 31.1 113
Divide Peak 8880 .0 .1 0* 28.1 27.0 104
Joe Wright 10120 14.5 17.1 85 37.4 33.7 111
Laprele Creek 8375 .2 .0 * 17.8 17.6 101
Med Bow 10500 36.1 -M * 44.0 -M *
North French Creek 10130 22.1 24.7 89 36.7 34.6 106
Never Summer 10280 21.8 17.3 126 25.7 -M *
Old Battle 10000 37.3 28.2 132 45.9 43.1 106
Rawah 9020 .3 .0 * 22.6 19.3 117
Sage Creek Basin 7850 -M .0 * 19.6 17.7 111
Sand Lake 10050 31.1 23.6 132 35.1 32.6 108
South Brush Creek 8440 .0 .0 * 16.9 20.7 82
Tower 10500 39.7 42.6 93 55.4 48.7 114
Webber Springs 9250 9.3 4.0 232 40.3 32.6 124
Willow Creek Pass 9540 10.4 3.9 267 23.3 18.0 129
Zirkel 9340 6.2 .0 * 50.6 33.8 150
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Basin Index (%) 123 113
SWEETWATER
Deer Park 9700 32.0 7.0 457 47.8 26.8 178
Larsen Creek 9000 .2 1.5 13 28.3 -M *
South Pass 9040 27.4 1.5 1827* 37.4 23.2 161
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Basin Index (%) 596 170
LOWER N. PLATTE
Casper Mtn. 7900 .2 .3 67* 21.9 21.2 103
Laprele Creek 8375 .2 .0 * 17.8 17.6 101
Reno Hill 8400 .3 .0 * 22.0 22.2 99
Windy Peak 7900 .0 .0 * 18.4 15.6 118
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Basin Index (%) 233* 105
LARAMIE RIVER
Brooklyn Lake 10240 11.4 10.0 114 29.4 27.9 105
Cinnabar Park 9574 4.7 5.5 85 29.4 30.0 98
Crow Creek 8330 .0 .0 * 16.0 15.8 101
Deadman Hill 10220 16.4 11.8 139 29.4 23.6 125
Rawah 9020 .3 .0 * 22.6 19.3 117
Roach 9700 7.2 5.6 129 28.8 25.3 114
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Basin Index (%) 122 110
S. PLATTE
Black Mountain 8920 .1 -M * 21.0 -M *
Crow Creek 8330 .0 .0 * 16.0 15.8 101
Deadman Hill 10220 16.4 11.8 139 29.4 23.6 125
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Basin Index (%) 139* 115
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * 20.9 19.0 110
Divide Peak 8880 .0 .1 0* 28.1 27.0 104
Elk River 8700 .3 .0 * 25.1 25.1 100
Little Snake River 8915 8.9 5.9 151 45.7 35.8 128
Old Battle 10000 37.3 28.2 132 45.9 43.1 106
Sage Creek Basin 7850 -M .0 * 19.6 17.7 111
Sandstone RS 8150 .0 .0 * 19.5 23.0 85
Whiskey Park 8950 12.0 13.0 92 37.7 34.4 110
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Basin Index (%) 124* 108
UPPER GREEN RIVER
Big Sandy Opening 9080 9.1 .0 * 27.6 17.5 158
Blind Bull Sum 8650 -M 15.8 * 39.9 23.9 167
East Rim Divide 7930 .0 .0 * 23.7 14.7 161
Elkhart Park G.S. 9400 8.9 2.1 424 27.8 17.4 160
Gros Ventre Summit 8750 9.8 .9 1089* 27.4 16.6 165
Gunsight Pass 9820 18.5 5.8 319 30.2 18.2 166
Kendall R.S. 7740 .0 .0 * 31.9 17.3 184
Loomis Park 8240 9.1 .0 * 35.5 21.1 168
New Fork Lake 8340 -M .0 * 22.1 14.1 157
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 -M .0 * 30.0 17.2 174
Spring Creek Divide 9000 33.7 15.1 223 46.5 28.7 162
Triple Peak 8500 18.3 1.7 1076* 46.2 31.0 149
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Basin Index (%) 420* 164
LOWER GREEN RIVER
Blacks Fork Jct 8869 .0 -M * 19.8 -M *
Buck Pasture 9632 .4 -M * 28.9 -M *
EF Blacks Fork GS 9360 -M -M * 24.1 -M *
Hams Fork 7840 .0 .0 * 24.9 14.9 167
Hewinta 9500 .0 .0 * 22.3 18.2 123
Hickerson Park 9122 .0 .0 * 16.3 14.1 116
Hole-in-Rock 9168 .0 .0 * 17.2 13.6 126
Indian Creek 9425 31.4 13.6 231 46.9 27.7 169
Kelley R.S. 8180 1.1 .0 * 35.6 22.4 159
Spirit Lk 10235 .9 -M * 22.6 -M *
Steel Creek Park 10158 14.1 11.2 126 26.8 21.6 124
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Basin Index (%) 188* 143
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 22.3 -M *
Bug Lake 7987 13.0 .0 * 39.3 24.1 163
Burts Miller Ranch 8000 .0 -M * 12.3 -M *
Chalk Creek #1 9171 18.3 9.5 193 42.6 31.6 135
Hayden Fork 9130 .2 .0 * 33.3 26.4 126
Kelley R.S. 8180 1.1 .0 * 35.6 22.4 159
Lily Lake 9133 .0 .0 * 24.1 22.0 110
Monte Cristo 8932 22.2 7.9 281 46.5 32.4 144
Salt River Summit 7760 .1 .0 * 32.8 20.5 160
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Basin Index (%) 316* 142
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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.