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 SUNDAY: MAY 28 , 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 2.0 .0 * 43.4 25.3 172
Black Bear 8170 41.1 29.0 142 61.9 45.7 135
Blind Bull Sum 8650 -M 15.0 * 39.9 24.0 166
Cottonwood Creek 7670 11.9 .0 * 46.0 31.0 148
East Rim Divide 7930 .0 .0 * 23.7 14.8 160
Grand Targhee 9260 52.3 41.0 128 53.4 38.2 140
Granite Creek 6770 .0 .0 * 39.1 23.7 165
Grassy Lake 7265 18.7 9.4 199 62.9 43.1 146
Gros Ventre Summit 8750 -M .4 * -M 16.7 *
Gunsight Pass 9820 18.8 5.2 362 30.1 18.3 164
Lewis Lake Divide 7850 28.6 15.7 182 60.3 42.2 143
Phillips Bench 8200 26.3 12.8 205 51.7 33.8 153
Salt River Summit 7760 .0 .0 * 32.9 20.5 160
Snake River Station 6920 .0 .0 * 39.9 27.3 146
Spring Creek Divide 9000 33.8 14.3 236 46.5 28.8 161
Thumb Divide 7980 .2 .0 * 31.5 23.5 134
Togwotee Pass 9580 31.4 21.2 148 44.9 30.7 146
Two Ocean Plateau 9240 -M 27.0 * -M 33.9 *
Willow Creek 8380 -M 7.5 * 60.0 42.0 143
Younts Peak 8350 .0 7.4 0 34.4 20.3 169
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Basin Index (%) 170* 151
MADISON-GALLATIN
Black Bear 8170 41.1 29.0 142 61.9 45.7 135
Canyon 7870 2.6 .0 * 29.9 20.6 145
Madison Plateau 7750 14.3 9.8 146 41.5 32.6 127
West Yellowstone 6700 .0 .0 * 26.9 18.1 149
Whiskey Creek 6800 -M .3 * 31.4 25.2 125
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Basin Index (%) 149* 135
YELLOWSTONE
Beartooth Lake 9360 31.9 19.4 164 33.2 24.9 133
Burnt Mtn 5880 .0 .0 * 23.7 20.5 116
Canyon 7870 2.6 .0 * 29.9 20.6 145
Cole Creek 7850 13.5 12.0 112 19.5 20.8 94
Evening Star 9200 34.1 20.4 167 51.1 34.5 148
Fisher Creek 9100 45.3 29.7 153 53.7 39.5 136
Northeast Entrance 7350 .0 .0 * 23.8 16.3 146
Parker Peak 9400 31.7 16.7 190 41.5 23.4 177
Sylvan Lake 8420 12.8 10.6 121 43.6 28.8 151
Thumb Divide 7980 .2 .0 * 31.5 23.5 134
Two Ocean Plateau 9240 -M 27.0 * -M 33.9 *
White Mill 8700 28.6 19.5 147 40.7 29.9 136
Wolverine 7650 -M .0 * 24.8 16.2 153
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Basin Index (%) 156 140
WIND RIVER
Burroughs Creek 8750 3.2 -M * 29.9 -M *
Castle Creek 8400 .0 -M * 19.3 -M *
Cold Springs 9630 3.8 .0 * 24.8 15.1 164
Deer Park 9700 31.4 6.3 498 47.9 26.8 179
Hobbs Park 10100 31.0 8.8 352 38.6 20.1 192
Kirwin 9550 17.9 4.3 416 31.4 16.6 189
Little Warm 9370 9.1 .0 * 28.3 18.1 156
Owl Creek 8975 .0 .0 * 17.4 10.4 167
South Pass 9040 27.1 1.1 2464* 37.9 23.3 163
St. Lawrence Alt 8620 .0 .0 * 23.4 14.2 165
Togwotee Pass 9580 31.4 21.2 148 44.9 30.7 146
Townsend Creek 8700 11.2 .0 * 31.9 17.9 178
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Basin Index (%) 391* 169
BIGHORN BASIN
Bald Mtn. 9380 20.3 15.8 128 23.7 23.1 103
Bear Trap Meadow 8200 .0 .0 * 17.1 13.6 126
Bone Springs Div 9350 16.1 11.4 141 23.6 21.9 108
Grave Springs 8550 1.2 .0 * 15.7 15.9 99
Kirwin 9550 17.9 4.3 416 31.4 16.6 189
Marquette 8760 14.3 -M * 26.7 -M *
Middle Powder 7760 .0 .0 * 15.7 17.1 92
Owl Creek 8975 .0 .0 * 17.4 10.4 167
Powder River Pass 9480 .6 .0 * 19.2 18.3 105
Shell Creek 9580 13.1 11.9 110 19.7 19.6 101
Timber Creek 7950 .1 .0 * 19.1 13.1 146
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Basin Index (%) 160* 119
SHOSHONE RIVER
Blackwater 9780 37.1 22.3 166 48.4 27.0 179
Evening Star 9200 34.1 20.4 167 51.1 34.5 148
Marquette 8760 14.3 -M * 26.7 -M *
Sylvan Road 7120 .0 .0 * 33.5 21.1 159
Younts Peak 8350 .0 7.4 0 34.4 20.3 169
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Basin Index (%) 142 163
POWDER RIVER
Bear Trap Meadow 8200 .0 .0 * 17.1 13.6 126
Cloud Peak Reservoir 9860 17.2 9.4 183 28.8 20.8 138
Grave Springs 8550 1.2 .0 * 15.7 15.9 99
Hansen Sawmill 8360 3.2 .0 * 18.9 13.8 137
Middle Powder 7760 .0 .0 * 15.7 17.1 92
Powder River Pass 9480 .6 .0 * 19.2 18.3 105
Soldier Park 8720 4.9 -M * 22.8 -M *
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Basin Index (%) 236* 116
TONGUE RIVER
Big Goose 7990 6.3 .0 * 21.7 18.0 121
Bone Springs Div 9350 16.1 11.4 141 23.6 21.9 108
Burgess Junction 7880 3.7 2.2 168 18.4 17.8 103
Dome Lake 8880 12.5 .0 * 25.3 20.0 126
Little Goose 8870 10.0 -M * 26.2 -M *
Sucker Creek 8880 9.2 3.2 288 21.4 21.1 101
Tie Creek 6870 .1 .0 * 24.8 18.3 136
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Basin Index (%) 285* 115
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 * 14.9 17.9 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 20.9 11.1 188 33.5 29.0 116
Blackhall Mtn 9820 28.3 -M * 45.1 -M *
Columbine 9160 .0 .0 * 35.3 31.2 113
Divide Peak 8880 .0 .0 * 28.2 27.1 104
Joe Wright 10120 15.0 16.4 91 38.1 33.9 112
Laprele Creek 8375 .2 .0 * 18.0 17.6 102
Med Bow 10500 36.1 -M * 44.1 -M *
North French Creek 10130 22.1 24.0 92 36.8 34.7 106
Never Summer 10280 22.2 17.0 131 26.1 -M *
Old Battle 10000 37.5 27.3 137 46.4 43.2 107
Rawah 9020 .4 .0 * 23.1 19.3 120
Sage Creek Basin 7850 -M .0 * 19.6 17.7 111
Sand Lake 10050 31.4 22.8 138 35.6 32.7 109
South Brush Creek 8440 .0 .0 * 17.0 20.8 82
Tower 10500 39.7 41.4 96 56.0 48.8 115
Webber Springs 9250 9.4 2.7 348 40.5 32.7 124
Willow Creek Pass 9540 10.9 3.0 363 23.6 18.1 130
Zirkel 9340 6.4 .0 * 50.7 33.8 150
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Basin Index (%) 130 114
SWEETWATER
Deer Park 9700 31.4 6.3 498 47.9 26.8 179
Larsen Creek 9000 .2 1.2 17* 28.3 -M *
South Pass 9040 27.1 1.1 2464* 37.9 23.3 163
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Basin Index (%) 683* 171
LOWER N. PLATTE
Casper Mtn. 7900 .3 .1 300* 22.0 21.4 103
Laprele Creek 8375 .2 .0 * 18.0 17.6 102
Reno Hill 8400 .2 .0 * 22.3 22.3 100
Windy Peak 7900 .0 .0 * 18.6 15.8 118
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Basin Index (%) 700* 105
LARAMIE RIVER
Brooklyn Lake 10240 11.3 9.0 126 29.6 28.0 106
Cinnabar Park 9574 4.3 4.6 93 29.5 30.0 98
Crow Creek 8330 .0 .0 * 16.1 15.9 101
Deadman Hill 10220 16.9 11.0 154 29.9 23.7 126
Rawah 9020 .4 .0 * 23.1 19.3 120
Roach 9700 7.3 4.7 155 28.9 25.4 114
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Basin Index (%) 137 110
S. PLATTE
Black Mountain 8920 .0 -M * 21.2 -M *
Crow Creek 8330 .0 .0 * 16.1 15.9 101
Deadman Hill 10220 16.9 11.0 154 29.9 23.7 126
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Basin Index (%) 154* 116
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * 20.9 19.0 110
Divide Peak 8880 .0 .0 * 28.2 27.1 104
Elk River 8700 .1 .0 * 25.3 25.2 100
Little Snake River 8915 8.9 5.0 178 45.7 35.8 128
Old Battle 10000 37.5 27.3 137 46.4 43.2 107
Sage Creek Basin 7850 -M .0 * 19.6 17.7 111
Sandstone RS 8150 .0 .0 * 19.8 23.0 86
Whiskey Park 8950 12.6 11.7 108 37.8 34.5 110
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Basin Index (%) 134* 108
UPPER GREEN RIVER
Big Sandy Opening 9080 8.5 .0 * 27.6 17.6 157
Blind Bull Sum 8650 -M 15.0 * 39.9 24.0 166
East Rim Divide 7930 .0 .0 * 23.7 14.8 160
Elkhart Park G.S. 9400 8.3 1.5 553 27.8 17.5 159
Gros Ventre Summit 8750 -M .4 * -M 16.7 *
Gunsight Pass 9820 18.8 5.2 362 30.1 18.3 164
Kendall R.S. 7740 .0 .0 * 31.9 17.4 183
Loomis Park 8240 8.7 .0 * 35.5 21.2 167
New Fork Lake 8340 -M .0 * 22.2 14.2 156
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 -M .0 * 30.1 17.3 174
Spring Creek Divide 9000 33.8 14.3 236 46.5 28.8 161
Triple Peak 8500 18.1 .7 2586* 46.5 31.1 150
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Basin Index (%) 443* 163
LOWER GREEN RIVER
Blacks Fork Jct 8869 .0 -M * 19.8 -M *
Buck Pasture 9632 .2 -M * 28.9 -M *
EF Blacks Fork GS 9360 -M -M * 24.1 -M *
Hams Fork 7840 .0 .0 * 24.9 15.0 166
Hewinta 9500 .0 .0 * 22.3 18.3 122
Hickerson Park 9122 .0 .0 * 16.3 14.1 116
Hole-in-Rock 9168 .0 .0 * 17.2 13.7 126
Indian Creek 9425 30.6 13.0 235 47.0 27.7 170
Kelley R.S. 8180 .0 .0 * 35.6 22.5 158
Spirit Lk 10235 .5 -M * 22.6 -M *
Steel Creek Park 10158 13.7 10.9 126 26.8 21.7 124
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Basin Index (%) 185* 143
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 22.3 -M *
Bug Lake 7987 11.9 .0 * 39.3 24.2 162
Burts Miller Ranch 8000 .0 -M * 12.4 -M *
Chalk Creek #1 9171 17.2 8.8 195 42.6 31.7 134
Hayden Fork 9130 .1 .0 * 33.3 26.5 126
Kelley R.S. 8180 .0 .0 * 35.6 22.5 158
Lily Lake 9133 .0 .0 * 24.1 22.1 109
Monte Cristo 8932 21.5 7.1 303 46.5 32.4 144
Salt River Summit 7760 .0 .0 * 32.9 20.5 160
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Basin Index (%) 319* 141
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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.