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 MONDAY: MAY 8 , 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 15.1 5.5 275 42.2 23.5 180
Black Bear 8170 49.6 36.9 134 59.9 42.8 140
Blind Bull Sum 8650 -M 22.6 * 39.0 22.0 177
Cottonwood Creek 7670 25.5 13.3 192 44.0 28.6 154
East Rim Divide 7930 3.1 6.6 47 22.6 13.4 169
Grand Targhee 9260 57.7 46.4 124 51.4 35.9 143
Granite Creek 6770 15.9 6.3 252 38.4 21.9 175
Grassy Lake 7265 33.9 26.7 127 61.5 40.3 153
Gros Ventre Summit 8750 18.6 10.0 186 26.5 15.2 174
Gunsight Pass 9820 24.0 11.8 203 28.2 16.7 169
Lewis Lake Divide 7850 43.2 29.5 146 59.8 39.5 151
Phillips Bench 8200 38.6 23.4 165 50.7 31.6 160
Salt River Summit 7760 12.1 5.7 212 31.8 18.9 168
Snake River Station 6920 7.1 3.5 203 39.3 25.4 155
Spring Creek Divide 9000 44.6 24.0 186 44.5 26.9 165
Thumb Divide 7980 14.2 9.4 151 30.5 21.6 141
Togwotee Pass 9580 35.9 25.2 142 43.2 28.3 153
Two Ocean Plateau 9240 -M 29.7 * -M 30.9 *
Willow Creek 8380 24.7 21.5 115 57.6 38.9 148
Younts Peak 8350 16.7 15.6 107 33.6 18.3 184
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Basin Index (%) 150 158
MADISON-GALLATIN
Black Bear 8170 49.6 36.9 134 59.9 42.8 140
Canyon 7870 14.6 8.0 182 28.8 18.6 155
Madison Plateau 7750 25.4 20.6 123 40.0 29.8 134
West Yellowstone 6700 .0 .0 * 26.0 16.5 158
Whiskey Creek 6800 9.2 11.5 80 29.9 22.9 131
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Basin Index (%) 128 141
YELLOWSTONE
Beartooth Lake 9360 35.2 23.0 153 31.8 22.8 139
Burnt Mtn 5880 .0 .0 * 18.6 16.9 110
Canyon 7870 14.6 8.0 182 28.8 18.6 155
Cole Creek 7850 15.2 17.0 89 14.2 17.5 81
Evening Star 9200 36.4 25.2 144 49.4 31.5 157
Fisher Creek 9100 46.3 33.8 137 52.6 36.3 145
Northeast Entrance 7350 .0 1.0 0 23.1 14.4 160
Parker Peak 9400 40.7 21.7 188 40.1 20.9 192
Sylvan Lake 8420 26.5 18.2 146 42.1 26.0 162
Thumb Divide 7980 14.2 9.4 151 30.5 21.6 141
Two Ocean Plateau 9240 -M 29.7 * -M 30.9 *
White Mill 8700 39.8 24.5 162 40.0 27.2 147
Wolverine 7650 -M .4 * 23.8 14.3 166
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Basin Index (%) 148 147
WIND RIVER
Burroughs Creek 8750 15.1 -M * 29.3 -M *
Castle Creek 8400 1.9 -M * 17.3 -M *
Cold Springs 9630 12.0 1.6 750 22.4 13.2 170
Deer Park 9700 34.9 14.6 239 43.4 24.3 179
Hobbs Park 10100 34.1 15.9 214 34.5 17.6 196
Kirwin 9550 23.1 10.8 214 29.3 14.6 201
Little Warm 9370 16.6 6.9 241 27.2 16.1 169
Owl Creek 8975 3.0 .5 600* 15.3 8.4 182
South Pass 9040 32.1 12.6 255 33.8 21.1 160
St. Lawrence Alt 8620 5.0 1.4 357 20.6 12.2 169
Togwotee Pass 9580 35.9 25.2 142 43.2 28.3 153
Townsend Creek 8700 17.2 4.8 358 28.2 15.6 181
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Basin Index (%) 227 174
BIGHORN BASIN
Bald Mtn. 9380 22.7 20.4 111 21.5 20.7 104
Bear Trap Meadow 8200 2.6 .2 1300* 14.9 11.4 131
Bone Springs Div 9350 21.9 16.4 134 21.8 19.3 113
Grave Springs 8550 9.5 8.2 116 13.7 13.7 100
Kirwin 9550 23.1 10.8 214 29.3 14.6 201
Marquette 8760 17.9 -M * 23.8 -M *
Middle Powder 7760 10.9 11.1 98 14.3 15.0 95
Owl Creek 8975 3.0 .5 600* 15.3 8.4 182
Powder River Pass 9480 8.8 9.0 98 18.1 16.0 113
Shell Creek 9580 17.9 16.6 108 18.5 17.3 107
Timber Creek 7950 3.5 1.8 194 15.0 10.7 140
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Basin Index (%) 130 124
SHOSHONE RIVER
Blackwater 9780 41.1 25.2 163 46.5 24.3 191
Evening Star 9200 36.4 25.2 144 49.4 31.5 157
Marquette 8760 17.9 -M * 23.8 -M *
Sylvan Road 7120 .0 2.4 0 32.3 19.2 168
Younts Peak 8350 16.7 15.6 107 33.6 18.3 184
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Basin Index (%) 138 173
POWDER RIVER
Bear Trap Meadow 8200 2.6 .2 1300* 14.9 11.4 131
Cloud Peak Reservoir 9860 20.0 16.6 120 26.5 17.8 149
Grave Springs 8550 9.5 8.2 116 13.7 13.7 100
Hansen Sawmill 8360 12.4 1.5 827 18.9 11.6 163
Middle Powder 7760 10.9 11.1 98 14.3 15.0 95
Powder River Pass 9480 8.8 9.0 98 18.1 16.0 113
Soldier Park 8720 14.6 -M * 20.5 -M *
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Basin Index (%) 138 124
TONGUE RIVER
Big Goose 7990 12.8 10.3 124 20.1 15.4 131
Bone Springs Div 9350 21.9 16.4 134 21.8 19.3 113
Burgess Junction 7880 11.4 11.4 100 16.0 15.7 102
Dome Lake 8880 17.9 11.2 160 22.0 17.5 126
Little Goose 8870 16.1 -M * 24.1 -M *
Sucker Creek 8880 13.7 12.3 111 19.1 18.6 103
Tie Creek 6870 .5 1.8 28 19.9 15.5 128
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Basin Index (%) 123 117
BELLE FOURCHE
Cole Canyon 5910 .0 .0 * 12.2 13.2 92
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Basin Index (%) * 92
CHEYENNE RIVER BASIN
Blind Park 6890 .1 .0 * 11.6 15.1 77
North Rapid Creek 6130 .0 .0 * 10.0 13.0 77
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Basin Index (%) * 77
UPPER N. PLATTE
Arapaho Ridge 10960 25.0 22.3 112 30.0 27.0 111
Blackhall Mtn 9820 35.4 -M * 42.0 -M *
Columbine 9160 8.6 14.4 60 32.1 29.3 110
Divide Peak 8880 8.1 15.6 52 26.1 25.2 104
Joe Wright 10120 17.6 22.9 77 33.5 30.9 108
Laprele Creek 8375 1.0 4.0 25 15.5 15.8 98
Med Bow 10500 38.2 -M * 41.2 -M *
North French Creek 10130 26.7 32.8 81 34.1 31.9 107
Never Summer 10280 24.3 22.1 110 22.7 -M *
Old Battle 10000 38.6 36.2 107 43.3 40.4 107
Rawah 9020 2.0 3.4 59 20.7 17.9 116
Sage Creek Basin 7850 -M .0 * 18.0 16.7 108
Sand Lake 10050 32.9 31.8 103 32.3 30.1 107
South Brush Creek 8440 .5 6.2 8 16.5 18.7 88
Tower 10500 43.9 51.4 85 51.0 46.1 111
Webber Springs 9250 19.7 20.2 98 37.1 30.8 120
Willow Creek Pass 9540 17.6 14.0 126 20.5 16.3 126
Zirkel 9340 20.6 20.1 102 46.8 32.0 146
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Basin Index (%) 90 112
SWEETWATER
Deer Park 9700 34.9 14.6 239 43.4 24.3 179
Larsen Creek 9000 7.4 7.1 104 26.1 -M *
South Pass 9040 32.1 12.6 255 33.8 21.1 160
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Basin Index (%) 217 170
LOWER N. PLATTE
Casper Mtn. 7900 10.1 11.9 85 18.9 19.0 99
Laprele Creek 8375 1.0 4.0 25 15.5 15.8 98
Reno Hill 8400 10.0 11.4 88 19.0 19.9 95
Windy Peak 7900 .2 1.6 12 14.0 13.6 103
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Basin Index (%) 74 99
LARAMIE RIVER
Brooklyn Lake 10240 19.4 21.9 89 26.8 25.7 104
Cinnabar Park 9574 12.6 18.0 70 26.8 28.0 96
Crow Creek 8330 .0 .0 * 12.4 14.1 88
Deadman Hill 10220 20.8 18.7 111 24.9 21.5 116
Rawah 9020 2.0 3.4 59 20.7 17.9 116
Roach 9700 14.6 16.4 89 25.3 23.1 110
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Basin Index (%) 89 105
S. PLATTE
Black Mountain 8920 3.9 -M * 16.4 -M *
Crow Creek 8330 .0 .0 * 12.4 14.1 88
Deadman Hill 10220 20.8 18.7 111 24.9 21.5 116
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Basin Index (%) 111* 105
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * 19.5 17.7 110
Divide Peak 8880 8.1 15.6 52 26.1 25.2 104
Elk River 8700 .3 9.3 3 23.2 23.5 99
Little Snake River 8915 20.5 20.9 98 43.6 34.0 128
Old Battle 10000 38.6 36.2 107 43.3 40.4 107
Sage Creek Basin 7850 -M .0 * 18.0 16.7 108
Sandstone RS 8150 -M 2.7 * 19.5 21.5 91
Whiskey Park 8950 23.1 27.0 86 35.2 32.6 108
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Basin Index (%) 83 108
UPPER GREEN RIVER
Big Sandy Opening 9080 19.3 8.7 222 25.7 15.9 162
Blind Bull Sum 8650 -M 22.6 * 39.0 22.0 177
East Rim Divide 7930 3.1 6.6 47 22.6 13.4 169
Elkhart Park G.S. 9400 17.8 9.8 182 26.3 15.7 168
Gros Ventre Summit 8750 18.6 10.0 186 26.5 15.2 174
Gunsight Pass 9820 24.0 11.8 203 28.2 16.7 169
Kendall R.S. 7740 9.4 .2 4700* 30.6 16.0 191
Loomis Park 8240 19.6 8.0 245 34.6 19.6 177
New Fork Lake 8340 7.3 3.5 209 20.1 12.7 158
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 8.2 7.6 108 29.3 16.1 182
Spring Creek Divide 9000 44.6 24.0 186 44.5 26.9 165
Triple Peak 8500 32.7 15.3 214 44.9 28.9 155
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Basin Index (%) 194 170
LOWER GREEN RIVER
Blacks Fork Jct 8869 .3 -M * 18.8 -M *
Buck Pasture 9632 12.7 -M * 27.3 -M *
EF Blacks Fork GS 9360 7.5 -M * 21.6 -M *
Hams Fork 7840 3.1 .3 1033* 23.9 13.6 176
Hewinta 9500 1.9 2.9 66 21.0 16.9 124
Hickerson Park 9122 .0 1.2 0 14.9 12.6 118
Hole-in-Rock 9168 .0 .7 0* 15.8 12.1 131
Indian Creek 9425 40.5 21.1 192 45.1 25.8 175
Kelley R.S. 8180 16.2 8.9 182 33.7 20.8 162
Spirit Lk 10235 11.7 -M * 21.0 -M *
Steel Creek Park 10158 20.3 17.7 115 25.3 19.9 127
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Basin Index (%) 155* 148
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 21.4 -M *
Bug Lake 7987 28.4 12.6 225 37.6 22.4 168
Burts Miller Ranch 8000 .0 -M * 12.0 -M *
Chalk Creek #1 9171 31.8 22.2 143 41.1 29.4 140
Hayden Fork 9130 8.1 6.6 123 33.5 24.6 136
Kelley R.S. 8180 16.2 8.9 182 33.7 20.8 162
Lily Lake 9133 7.5 7.0 107 23.0 20.3 113
Monte Cristo 8932 36.1 22.7 159 44.7 30.3 148
Salt River Summit 7760 12.1 5.7 212 31.8 18.9 168
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Basin Index (%) 164 147
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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.