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: MAY 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 7.7 .0 * 42.3 24.2 175
Black Bear 8170 44.9 35.3 127 60.6 44.3 137
Blind Bull Sum 8650 -M 21.5 * 39.3 23.0 171
Cottonwood Creek 7670 18.1 8.9 203 44.2 29.6 149
East Rim Divide 7930 .0 2.6 0 23.1 14.0 165
Grand Targhee 9260 54.7 44.0 124 52.2 36.7 142
Granite Creek 6770 8.9 .0 * 38.5 22.7 170
Grassy Lake 7265 25.0 20.4 123 61.8 41.5 149
Gros Ventre Summit 8750 -M 7.6 * -M 15.9 *
Gunsight Pass 9820 19.6 11.7 168 28.7 17.5 164
Lewis Lake Divide 7850 36.5 24.5 149 59.8 40.6 147
Phillips Bench 8200 31.7 21.0 151 51.2 32.6 157
Salt River Summit 7760 3.0 .6 500* 32.0 19.7 162
Snake River Station 6920 .0 .0 * 39.3 26.2 150
Spring Creek Divide 9000 37.5 22.0 170 45.2 27.8 163
Thumb Divide 7980 4.3 3.6 119 30.7 22.5 136
Togwotee Pass 9580 31.6 23.8 133 43.4 29.3 148
Two Ocean Plateau 9240 -M 29.0 * -M 32.4 *
Willow Creek 8380 -M 18.8 * 58.1 40.4 144
Younts Peak 8350 2.1 12.9 16 33.8 19.2 176
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Basin Index (%) 141 153
MADISON-GALLATIN
Black Bear 8170 44.9 35.3 127 60.6 44.3 137
Canyon 7870 8.1 4.2 193 28.9 19.6 147
Madison Plateau 7750 18.9 15.9 119 40.6 31.1 131
West Yellowstone 6700 .0 .0 * 26.3 17.4 151
Whiskey Creek 6800 4.3 7.6 57 30.1 24.0 125
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Basin Index (%) 121 137
YELLOWSTONE
Beartooth Lake 9360 32.6 22.3 146 31.9 23.9 133
Burnt Mtn 5880 .0 .0 * 18.7 18.9 99
Canyon 7870 8.1 4.2 193 28.9 19.6 147
Cole Creek 7850 11.3 16.8 67 14.5 19.2 76
Evening Star 9200 34.5 24.9 139 49.6 32.9 151
Fisher Creek 9100 46.1 33.6 137 53.0 37.9 140
Northeast Entrance 7350 .0 .0 * 23.3 15.3 152
Parker Peak 9400 33.9 20.9 162 40.1 22.1 181
Sylvan Lake 8420 15.8 16.3 97 42.2 27.2 155
Thumb Divide 7980 4.3 3.6 119 30.7 22.5 136
Two Ocean Plateau 9240 -M 29.0 * -M 32.4 *
White Mill 8700 33.2 23.7 140 40.1 28.6 140
Wolverine 7650 .0 .0 * 23.8 15.3 156
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Basin Index (%) 132 140
WIND RIVER
Burroughs Creek 8750 8.3 -M * 29.4 -M *
Castle Creek 8400 .0 -M * 17.9 -M *
Cold Springs 9630 4.6 .0 * 22.5 14.2 158
Deer Park 9700 30.1 12.4 243 44.1 25.7 172
Hobbs Park 10100 29.9 14.4 208 34.9 19.0 184
Kirwin 9550 18.4 9.7 190 29.4 15.6 188
Little Warm 9370 11.4 4.9 233 27.6 17.1 161
Owl Creek 8975 .0 .0 * 15.6 9.4 166
South Pass 9040 27.1 9.2 295 34.0 22.2 153
St. Lawrence Alt 8620 .0 .0 * 20.9 13.2 158
Togwotee Pass 9580 31.6 23.8 133 43.4 29.3 148
Townsend Creek 8700 11.6 .3 3867* 28.6 16.8 170
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Basin Index (%) 220 165
BIGHORN BASIN
Bald Mtn. 9380 19.5 20.3 96 21.7 21.8 100
Bear Trap Meadow 8200 .0 .0 * 15.4 12.4 124
Bone Springs Div 9350 17.8 15.3 116 22.5 20.5 110
Grave Springs 8550 4.7 5.2 90 13.9 14.8 94
Kirwin 9550 18.4 9.7 190 29.4 15.6 188
Marquette 8760 13.2 -M * 23.9 -M *
Middle Powder 7760 4.4 7.7 57 15.1 16.0 94
Owl Creek 8975 .0 .0 * 15.6 9.4 166
Powder River Pass 9480 3.5 7.4 47 18.3 17.0 108
Shell Creek 9580 14.0 16.1 87 18.9 18.3 103
Timber Creek 7950 .0 .0 * 15.2 11.9 128
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Basin Index (%) 101 118
SHOSHONE RIVER
Blackwater 9780 38.7 24.9 155 46.7 25.6 182
Evening Star 9200 34.5 24.9 139 49.6 32.9 151
Marquette 8760 13.2 -M * 23.9 -M *
Sylvan Road 7120 .0 .0 * 32.5 20.0 162
Younts Peak 8350 2.1 12.9 16 33.8 19.2 176
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Basin Index (%) 120 166
POWDER RIVER
Bear Trap Meadow 8200 .0 .0 * 15.4 12.4 124
Cloud Peak Reservoir 9860 16.8 15.8 106 26.6 19.3 138
Grave Springs 8550 4.7 5.2 90 13.9 14.8 94
Hansen Sawmill 8360 6.3 .0 * 20.0 12.6 159
Middle Powder 7760 4.4 7.7 57 15.1 16.0 94
Powder River Pass 9480 3.5 7.4 47 18.3 17.0 108
Soldier Park 8720 7.4 -M * 20.8 -M *
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Basin Index (%) 99 119
TONGUE RIVER
Big Goose 7990 7.6 7.5 101 20.3 16.8 121
Bone Springs Div 9350 17.8 15.3 116 22.5 20.5 110
Burgess Junction 7880 6.2 9.8 63 16.3 16.7 98
Dome Lake 8880 13.3 8.5 156 22.8 18.7 122
Little Goose 8870 10.6 -M * 24.4 -M *
Sucker Creek 8880 9.4 10.3 91 19.3 19.9 97
Tie Creek 6870 .1 .0 * 20.2 16.9 120
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Basin Index (%) 106 111
BELLE FOURCHE
Cole Canyon 5910 .0 .0 * 12.7 14.6 87
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Basin Index (%) * 87
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 13.6 16.4 83
North Rapid Creek 6130 .0 .0 * 11.5 14.3 80
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Basin Index (%) * 82
UPPER N. PLATTE
Arapaho Ridge 10960 20.3 20.5 99 30.4 28.4 107
Blackhall Mtn 9820 27.9 -M * 42.1 -M *
Columbine 9160 .0 6.4 0 32.3 30.4 106
Divide Peak 8880 .0 8.6 0 26.5 26.2 101
Joe Wright 10120 13.2 22.3 59 33.9 32.5 104
Laprele Creek 8375 .1 .0 * 15.7 16.6 95
Med Bow 10500 34.9 -M * 41.4 -M *
North French Creek 10130 21.5 31.3 69 34.4 33.4 103
Never Summer 10280 20.9 21.7 96 23.3 -M *
Old Battle 10000 35.2 33.9 104 43.5 41.8 104
Rawah 9020 .1 .9 11* 20.8 18.8 111
Sage Creek Basin 7850 -M .0 * 18.4 17.2 107
Sand Lake 10050 29.6 29.3 101 32.3 31.5 103
South Brush Creek 8440 .0 .5 0* 16.4 19.8 83
Tower 10500 37.0 49.0 76 51.9 47.5 109
Webber Springs 9250 11.5 14.8 78 37.5 31.8 118
Willow Creek Pass 9540 11.9 10.6 112 21.0 17.1 123
Zirkel 9340 11.0 14.3 77 47.3 33.3 142
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Basin Index (%) 80 108
SWEETWATER
Deer Park 9700 30.1 12.4 243 44.1 25.7 172
Larsen Creek 9000 .4 4.5 9 26.7 -M *
South Pass 9040 27.1 9.2 295 34.0 22.2 153
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Basin Index (%) 221 163
LOWER N. PLATTE
Casper Mtn. 7900 .5 7.4 7 19.9 20.1 99
Laprele Creek 8375 .1 .0 * 15.7 16.6 95
Reno Hill 8400 .8 6.4 12 19.8 21.0 94
Windy Peak 7900 .0 .0 * 15.2 14.4 106
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Basin Index (%) 10 98
LARAMIE RIVER
Brooklyn Lake 10240 12.4 18.7 66 26.9 26.9 100
Cinnabar Park 9574 5.5 14.4 38 27.1 29.4 92
Crow Creek 8330 -M .0 * 12.4 15.0 83
Deadman Hill 10220 14.3 17.9 80 25.2 22.7 111
Rawah 9020 .1 .9 11* 20.8 18.8 111
Roach 9700 7.9 13.1 60 25.8 24.3 106
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Basin Index (%) 62 101
S. PLATTE
Black Mountain 8920 -M -M * 16.8 -M *
Crow Creek 8330 -M .0 * 12.4 15.0 83
Deadman Hill 10220 14.3 17.9 80 25.2 22.7 111
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Basin Index (%) 80* 100
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * 19.6 18.5 106
Divide Peak 8880 .0 8.6 0 26.5 26.2 101
Elk River 8700 .0 1.2 0* 23.3 24.4 95
Little Snake River 8915 11.9 16.5 72 43.8 35.0 125
Old Battle 10000 35.2 33.9 104 43.5 41.8 104
Sage Creek Basin 7850 -M .0 * 18.4 17.2 107
Sandstone RS 8150 .0 .0 * 19.4 22.3 87
Whiskey Park 8950 15.7 23.8 66 35.5 33.7 105
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Basin Index (%) 75 105
UPPER GREEN RIVER
Big Sandy Opening 9080 12.8 6.1 210 26.3 16.6 158
Blind Bull Sum 8650 -M 21.5 * 39.3 23.0 171
East Rim Divide 7930 .0 2.6 0 23.1 14.0 165
Elkhart Park G.S. 9400 12.2 7.5 163 26.9 16.5 163
Gros Ventre Summit 8750 -M 7.6 * -M 15.9 *
Gunsight Pass 9820 19.6 11.7 168 28.7 17.5 164
Kendall R.S. 7740 .0 .0 * 31.4 16.6 189
Loomis Park 8240 13.4 4.8 279 35.3 20.4 173
New Fork Lake 8340 .0 .4 0* 21.3 13.4 159
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 .0 2.9 0 29.4 16.6 177
Spring Creek Divide 9000 37.5 22.0 170 45.2 27.8 163
Triple Peak 8500 23.7 11.1 214 44.9 30.0 150
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Basin Index (%) 173 166
LOWER GREEN RIVER
Blacks Fork Jct 8869 .0 -M * 19.2 -M *
Buck Pasture 9632 4.6 -M * 27.7 -M *
EF Blacks Fork GS 9360 -M -M * 23.3 -M *
Hams Fork 7840 .0 .0 * 24.0 14.2 169
Hewinta 9500 .0 .0 * 21.2 17.6 120
Hickerson Park 9122 .1 .0 * 15.0 13.3 113
Hole-in-Rock 9168 .0 .0 * 15.8 12.8 123
Indian Creek 9425 34.3 20.5 167 45.5 26.8 170
Kelley R.S. 8180 7.3 5.1 143 34.4 21.6 159
Spirit Lk 10235 3.1 -M * 21.1 -M *
Steel Creek Park 10158 15.5 15.8 98 25.6 20.8 123
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Basin Index (%) 138* 143
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 21.5 -M *
Bug Lake 7987 19.6 8.4 233 38.1 23.2 164
Burts Miller Ranch 8000 .0 -M * 11.9 -M *
Chalk Creek #1 9171 23.1 18.0 128 41.4 30.6 135
Hayden Fork 9130 .2 1.1 18* 32.6 25.6 127
Kelley R.S. 8180 7.3 5.1 143 34.4 21.6 159
Lily Lake 9133 .0 .0 * 23.1 21.2 109
Monte Cristo 8932 26.9 17.5 154 45.0 31.4 143
Salt River Summit 7760 3.0 .6 500* 32.0 19.7 162
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Basin Index (%) 158* 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.