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: JUNE 17 , 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 .1 .0 * 45.1 27.4 165
Black Bear 8170 19.8 9.6 206 64.8 48.8 133
Blind Bull Sum 8650 -M .0 * 41.8 25.7 163
Cottonwood Creek 7670 .0 .0 * 47.6 33.3 143
East Rim Divide 7930 .2 .0 * 25.3 16.1 157
Grand Targhee 9260 26.0 32.8 79 56.2 42.6 132
Granite Creek 6770 .1 .0 * 41.4 25.4 163
Grassy Lake 7265 -M .0 * 65.9 46.2 143
Gros Ventre Summit 8750 .1 .0 * 28.9 18.5 156
Gunsight Pass 9820 1.7 .0 * 31.5 20.3 155
Lewis Lake Divide 7850 1.4 .0 * 63.1 44.8 141
Phillips Bench 8200 2.7 .0 * 53.5 36.2 148
Salt River Summit 7760 .1 .0 * 33.3 22.1 151
Snake River Station 6920 .0 .0 * 41.8 29.6 141
Spring Creek Divide 9000 8.9 .0 * 47.3 30.6 155
Thumb Divide 7980 .4 .0 * 32.5 25.5 127
Togwotee Pass 9580 16.8 12.2 138 47.5 32.8 145
Two Ocean Plateau 9240 -M 14.5 * -M 36.5 *
Willow Creek 8380 -M .0 * 61.9 44.9 138
Younts Peak 8350 .2 .0 * 37.8 22.5 168
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Basin Index (%) 144* 146
MADISON-GALLATIN
Black Bear 8170 19.8 9.6 206 64.8 48.8 133
Canyon 7870 .0 .0 * 31.0 22.6 137
Madison Plateau 7750 .0 .0 * 43.7 35.3 124
West Yellowstone 6700 .2 .0 * 28.1 20.2 139
Whiskey Creek 6800 .1 .0 * 33.6 27.8 121
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Basin Index (%) 209* 130
YELLOWSTONE
Beartooth Lake 9360 21.3 7.1 300 35.0 27.0 130
Burnt Mtn 5880 .0 .0 * 24.7 23.5 105
Canyon 7870 .0 .0 * 31.0 22.6 137
Cole Creek 7850 .0 .4 0* 20.5 23.7 86
Evening Star 9200 15.7 7.9 199 54.2 37.6 144
Fisher Creek 9100 23.8 16.5 144 55.7 43.0 130
Northeast Entrance 7350 .0 .0 * 25.6 18.7 137
Parker Peak 9400 10.3 4.5 229 43.7 26.1 167
Sylvan Lake 8420 .2 .0 * 45.7 31.9 143
Thumb Divide 7980 .4 .0 * 32.5 25.5 127
Two Ocean Plateau 9240 -M 14.5 * -M 36.5 *
White Mill 8700 9.0 6.7 134 42.7 32.9 130
Wolverine 7650 -M .0 * 26.5 18.0 147
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Basin Index (%) 187* 132
WIND RIVER
Burroughs Creek 8750 .0 -M * 32.4 -M *
Castle Creek 8400 .0 -M * 20.6 -M *
Cold Springs 9630 .0 .0 * 25.7 16.8 153
Deer Park 9700 10.0 .0 * 48.6 29.1 167
Hobbs Park 10100 10.8 .0 * 39.2 22.1 177
Kirwin 9550 .2 .0 * 32.5 18.8 173
Little Warm 9370 .0 .0 * 29.6 19.9 149
Owl Creek 8975 .0 .0 * 18.5 12.2 152
South Pass 9040 .9 .0 * 39.0 25.1 155
St. Lawrence Alt 8620 .1 .0 * 24.0 16.0 150
Togwotee Pass 9580 16.8 12.2 138 47.5 32.8 145
Townsend Creek 8700 .1 .0 * 33.5 19.6 171
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Basin Index (%) 319* 159
BIGHORN BASIN
Bald Mtn. 9380 .3 2.3 13 25.0 25.7 97
Bear Trap Meadow 8200 .0 .0 * 19.6 15.4 127
Bone Springs Div 9350 .0 .0 * 24.8 24.5 101
Grave Springs 8550 .0 .0 * 16.8 17.6 95
Kirwin 9550 .2 .0 * 32.5 18.8 173
Marquette 8760 .1 -M * 28.2 -M *
Middle Powder 7760 .0 .0 * 18.2 19.1 95
Owl Creek 8975 .0 .0 * 18.5 12.2 152
Powder River Pass 9480 .1 .0 * 22.9 20.9 110
Shell Creek 9580 .0 .0 * 22.6 22.1 102
Timber Creek 7950 .0 .0 * 20.0 15.5 129
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Basin Index (%) 26* 115
SHOSHONE RIVER
Blackwater 9780 24.5 11.4 215 51.1 29.5 173
Evening Star 9200 15.7 7.9 199 54.2 37.6 144
Marquette 8760 .1 -M * 28.2 -M *
Sylvan Road 7120 .0 .0 * -M 23.2 *
Younts Peak 8350 .2 .0 * 37.8 22.5 168
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Basin Index (%) 209* 160
POWDER RIVER
Bear Trap Meadow 8200 .0 .0 * 19.6 15.4 127
Cloud Peak Reservoir 9860 .0 .0 * 30.7 23.3 132
Grave Springs 8550 .0 .0 * 16.8 17.6 95
Hansen Sawmill 8360 .0 .0 * -M 16.0 *
Middle Powder 7760 .0 .0 * 18.2 19.1 95
Powder River Pass 9480 .1 .0 * 22.9 20.9 110
Soldier Park 8720 .0 -M * 25.2 -M *
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Basin Index (%) * 112
TONGUE RIVER
Big Goose 7990 .2 .0 * 22.7 19.7 115
Bone Springs Div 9350 .0 .0 * 24.8 24.5 101
Burgess Junction 7880 .0 .0 * 22.2 19.9 112
Dome Lake 8880 -M .0 * 26.9 22.3 121
Little Goose 8870 .0 -M * 27.2 -M *
Sucker Creek 8880 .0 .0 * 24.5 23.6 104
Tie Creek 6870 .1 .0 * 26.0 21.0 124
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Basin Index (%) * 112
BELLE FOURCHE
Cole Canyon 5910 .0 .0 * 15.8 19.1 83
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Basin Index (%) * 83
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 16.9 20.7 82
North Rapid Creek 6130 .0 .0 * 17.4 18.5 94
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Basin Index (%) * 88
UPPER N. PLATTE
Arapaho Ridge 10960 .7 .0 * 33.6 31.0 108
Blackhall Mtn 9820 1.5 -M * 45.9 -M *
Columbine 9160 .0 .0 * 35.4 32.5 109
Divide Peak 8880 .0 .0 * 28.4 28.6 99
Joe Wright 10120 .2 1.7 12* 38.3 35.9 107
Laprele Creek 8375 .0 .0 * 19.1 19.3 99
Med Bow 10500 13.4 -M * 45.0 -M *
North French Creek 10130 .3 7.4 4 37.2 36.8 101
Never Summer 10280 1.9 3.5 54 26.7 -M *
Old Battle 10000 15.1 2.2 686* 47.2 45.1 105
Rawah 9020 .1 .0 * 23.5 21.2 111
Sage Creek Basin 7850 -M .0 * 19.4 18.9 103
Sand Lake 10050 14.0 7.5 187 36.5 35.1 104
South Brush Creek 8440 .0 .0 * 18.4 22.3 83
Tower 10500 16.1 18.6 87 56.5 51.1 111
Webber Springs 9250 .1 .0 * 40.5 34.3 118
Willow Creek Pass 9540 .1 .0 * 23.8 19.7 121
Zirkel 9340 .0 .0 * 51.0 36.0 142
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Basin Index (%) 119* 109
SWEETWATER
Deer Park 9700 10.0 .0 * 48.6 29.1 167
Larsen Creek 9000 .2 .0 * 29.1 -M *
South Pass 9040 .9 .0 * 39.0 25.1 155
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Basin Index (%) * 162
LOWER N. PLATTE
Casper Mtn. 7900 .0 .0 * 23.8 23.4 102
Laprele Creek 8375 .0 .0 * 19.1 19.3 99
Reno Hill 8400 .0 .0 * 23.5 24.2 97
Windy Peak 7900 .1 .0 * 19.1 17.7 108
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Basin Index (%) * 101
LARAMIE RIVER
Brooklyn Lake 10240 .4 .0 * 31.6 29.8 106
Cinnabar Park 9574 .0 .0 * 30.2 32.3 93
Crow Creek 8330 .0 .0 * 16.5 18.7 88
Deadman Hill 10220 .2 .0 * 30.3 25.3 120
Rawah 9020 .1 .0 * 23.5 21.2 111
Roach 9700 .0 .0 * 29.0 27.2 107
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Basin Index (%) * 104
S. PLATTE
Black Mountain 8920 -M -M * 21.2 -M *
Crow Creek 8330 .0 .0 * 16.5 18.7 88
Deadman Hill 10220 .2 .0 * 30.3 25.3 120
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Basin Index (%) * 106
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * 21.1 20.2 104
Divide Peak 8880 .0 .0 * 28.4 28.6 99
Elk River 8700 .0 .0 * 24.9 26.7 93
Little Snake River 8915 .2 .0 * 46.1 38.1 121
Old Battle 10000 15.1 2.2 686* 47.2 45.1 105
Sage Creek Basin 7850 -M .0 * 19.4 18.9 103
Sandstone RS 8150 .0 .0 * 20.3 24.3 84
Whiskey Park 8950 .1 .0 * 37.7 36.4 104
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Basin Index (%) 700* 103
UPPER GREEN RIVER
Big Sandy Opening 9080 .0 .0 * 28.4 19.4 146
Blind Bull Sum 8650 -M .0 * 41.8 25.7 163
East Rim Divide 7930 .2 .0 * 25.3 16.1 157
Elkhart Park G.S. 9400 .0 .0 * 29.0 19.3 150
Gros Ventre Summit 8750 .1 .0 * 28.9 18.5 156
Gunsight Pass 9820 1.7 .0 * 31.5 20.3 155
Kendall R.S. 7740 .0 .0 * 33.8 18.7 181
Loomis Park 8240 .3 .0 * 37.1 22.7 163
New Fork Lake 8340 .0 .0 * 23.7 15.9 149
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 .0 .0 * 30.7 18.5 166
Spring Creek Divide 9000 8.9 .0 * 47.3 30.6 155
Triple Peak 8500 .2 .0 * 47.7 33.1 144
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Basin Index (%) * 157
LOWER GREEN RIVER
Blacks Fork Jct 8869 .1 -M * 20.0 -M *
Buck Pasture 9632 .0 -M * 28.8 -M *
EF Blacks Fork GS 9360 -M -M * 24.3 -M *
Hams Fork 7840 .3 .0 * 25.8 16.4 157
Hewinta 9500 .0 .0 * 22.6 19.7 115
Hickerson Park 9122 .0 .0 * 16.7 15.3 109
Hole-in-Rock 9168 .0 .0 * 17.5 15.0 117
Indian Creek 9425 8.2 .0 * 48.3 29.4 164
Kelley R.S. 8180 .0 .0 * 36.8 24.1 153
Spirit Lk 10235 .0 -M * 22.7 -M *
Steel Creek Park 10158 -M .0 * 27.1 23.1 117
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Basin Index (%) * 136
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 22.6 -M *
Bug Lake 7987 .8 .0 * 40.2 25.6 157
Burts Miller Ranch 8000 .0 -M * 12.7 -M *
Chalk Creek #1 9171 .0 .0 * 43.2 33.6 129
Hayden Fork 9130 .0 .0 * 33.2 28.1 118
Kelley R.S. 8180 .0 .0 * 36.8 24.1 153
Lily Lake 9133 .0 .0 * 24.5 23.6 104
Monte Cristo 8932 .4 .0 * 48.1 34.3 140
Salt River Summit 7760 .1 .0 * 33.3 22.1 151
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Basin Index (%) * 135
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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.