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 TUESDAY: MAY 9 , 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 14.2 5.0 284 42.2 23.6 179
Black Bear 8170 49.1 36.8 133 59.9 42.9 140
Blind Bull Sum 8650 -M 22.5 * 39.2 22.1 177
Cottonwood Creek 7670 24.7 13.1 189 44.1 28.6 154
East Rim Divide 7930 1.9 6.2 31 23.0 13.5 170
Grand Targhee 9260 57.4 46.4 124 51.5 35.9 143
Granite Creek 6770 16.0 5.9 271 38.4 22.0 175
Grassy Lake 7265 33.1 26.4 125 61.5 40.4 152
Gros Ventre Summit 8750 18.4 9.8 188 26.6 15.3 174
Gunsight Pass 9820 23.9 11.9 201 28.6 16.8 170
Lewis Lake Divide 7850 42.1 29.5 143 59.8 39.6 151
Phillips Bench 8200 37.5 23.3 161 50.8 31.7 160
Salt River Summit 7760 11.0 5.1 216 31.9 19.0 168
Snake River Station 6920 5.8 3.1 187 39.2 25.5 154
Spring Creek Divide 9000 44.3 23.8 186 44.8 27.0 166
Thumb Divide 7980 13.2 8.9 148 30.6 21.7 141
Togwotee Pass 9580 35.6 25.3 141 43.3 28.4 152
Two Ocean Plateau 9240 -M 29.7 * -M 31.1 *
Willow Creek 8380 23.8 21.3 112 57.7 39.0 148
Younts Peak 8350 15.6 15.5 101 33.7 18.4 183
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Basin Index (%) 147 158
MADISON-GALLATIN
Black Bear 8170 49.1 36.8 133 59.9 42.9 140
Canyon 7870 13.7 7.7 178 28.8 18.8 153
Madison Plateau 7750 24.4 20.4 120 40.0 29.9 134
West Yellowstone 6700 .0 .0 * 26.0 16.6 157
Whiskey Creek 6800 8.6 11.1 77 29.9 23.0 130
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Basin Index (%) 126 141
YELLOWSTONE
Beartooth Lake 9360 34.7 23.0 151 31.8 23.0 138
Burnt Mtn 5880 .0 .0 * 18.6 17.0 109
Canyon 7870 13.7 7.7 178 28.8 18.8 153
Cole Creek 7850 14.9 17.1 87 14.3 17.8 80
Evening Star 9200 36.1 25.3 143 49.5 31.7 156
Fisher Creek 9100 45.6 34.0 134 52.7 36.5 144
Northeast Entrance 7350 .0 1.0 0 23.1 14.5 159
Parker Peak 9400 39.9 21.8 183 40.1 21.1 190
Sylvan Lake 8420 25.9 18.1 143 42.1 26.2 161
Thumb Divide 7980 13.2 8.9 148 30.6 21.7 141
Two Ocean Plateau 9240 -M 29.7 * -M 31.1 *
White Mill 8700 38.8 24.6 158 40.0 27.4 146
Wolverine 7650 -M .4 * 23.8 14.5 164
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Basin Index (%) 145 146
WIND RIVER
Burroughs Creek 8750 14.8 -M * 29.4 -M *
Castle Creek 8400 1.4 -M * 17.9 -M *
Cold Springs 9630 12.0 1.7 706 22.5 13.3 169
Deer Park 9700 34.5 14.5 238 43.5 24.4 178
Hobbs Park 10100 34.0 15.9 214 34.5 17.7 195
Kirwin 9550 23.0 10.9 211 29.3 14.7 199
Little Warm 9370 16.6 6.7 248 27.4 16.1 170
Owl Creek 8975 2.8 .6 467 15.5 8.5 182
South Pass 9040 31.8 12.2 261 33.8 21.2 159
St. Lawrence Alt 8620 4.6 1.4 329 20.8 12.3 169
Togwotee Pass 9580 35.6 25.3 141 43.3 28.4 152
Townsend Creek 8700 17.0 4.4 386 28.3 15.7 180
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Basin Index (%) 226 173
BIGHORN BASIN
Bald Mtn. 9380 22.6 20.5 110 21.5 20.9 103
Bear Trap Meadow 8200 2.0 .2 1000* 14.9 11.5 130
Bone Springs Div 9350 21.9 16.5 133 21.7 19.5 111
Grave Springs 8550 9.1 7.9 115 13.6 13.9 98
Kirwin 9550 23.0 10.9 211 29.3 14.7 199
Marquette 8760 17.6 -M * 23.8 -M *
Middle Powder 7760 10.4 11.0 95 14.3 15.2 94
Owl Creek 8975 2.8 .6 467 15.5 8.5 182
Powder River Pass 9480 8.4 9.0 93 18.2 16.1 113
Shell Creek 9580 17.8 16.7 107 18.6 17.5 106
Timber Creek 7950 3.1 1.7 182 15.0 10.8 139
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Basin Index (%) 127 123
SHOSHONE RIVER
Blackwater 9780 40.8 25.0 163 46.5 24.4 191
Evening Star 9200 36.1 25.3 143 49.5 31.7 156
Marquette 8760 17.6 -M * 23.8 -M *
Sylvan Road 7120 .0 1.9 0 32.3 19.2 168
Younts Peak 8350 15.6 15.5 101 33.7 18.4 183
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Basin Index (%) 137 173
POWDER RIVER
Bear Trap Meadow 8200 2.0 .2 1000* 14.9 11.5 130
Cloud Peak Reservoir 9860 19.6 16.7 117 26.5 18.0 147
Grave Springs 8550 9.1 7.9 115 13.6 13.9 98
Hansen Sawmill 8360 12.2 1.4 871 18.8 11.8 159
Middle Powder 7760 10.4 11.0 95 14.3 15.2 94
Powder River Pass 9480 8.4 9.0 93 18.2 16.1 113
Soldier Park 8720 14.3 -M * 20.5 -M *
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Basin Index (%) 134 123
TONGUE RIVER
Big Goose 7990 12.5 10.4 120 20.1 15.6 129
Bone Springs Div 9350 21.9 16.5 133 21.7 19.5 111
Burgess Junction 7880 11.2 11.5 97 16.0 15.9 101
Dome Lake 8880 17.5 11.2 156 22.0 17.8 124
Little Goose 8870 15.9 -M * 24.0 -M *
Sucker Creek 8880 13.5 12.5 108 19.1 18.8 102
Tie Creek 6870 .2 1.7 12 19.9 15.7 127
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Basin Index (%) 120 115
BELLE FOURCHE
Cole Canyon 5910 .0 .0 * 12.1 13.4 90
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Basin Index (%) * 90
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 11.6 15.3 76
North Rapid Creek 6130 .0 .0 * 10.0 13.2 76
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Basin Index (%) * 76
UPPER N. PLATTE
Arapaho Ridge 10960 24.6 22.4 110 30.0 27.3 110
Blackhall Mtn 9820 35.2 -M * 42.1 -M *
Columbine 9160 7.7 13.5 57 32.2 29.5 109
Divide Peak 8880 7.2 14.9 48 26.1 25.4 103
Joe Wright 10120 17.3 23.0 75 33.5 31.2 107
Laprele Creek 8375 .4 3.4 12 15.5 16.0 97
Med Bow 10500 37.8 -M * 41.3 -M *
North French Creek 10130 26.2 32.8 80 34.1 32.2 106
Never Summer 10280 24.1 22.1 109 22.7 -M *
Old Battle 10000 38.1 36.6 104 43.3 40.7 106
Rawah 9020 1.2 3.0 40 20.8 18.0 116
Sage Creek Basin 7850 -M .0 * 18.2 16.8 108
Sand Lake 10050 32.6 31.8 103 32.2 30.3 106
South Brush Creek 8440 .5 5.8 9 16.7 18.9 88
Tower 10500 43.2 51.4 84 51.1 46.2 111
Webber Springs 9250 19.0 19.8 96 37.1 31.0 120
Willow Creek Pass 9540 17.0 13.7 124 20.6 16.4 126
Zirkel 9340 19.8 19.9 99 46.8 32.2 145
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Basin Index (%) 89 111
SWEETWATER
Deer Park 9700 34.5 14.5 238 43.5 24.4 178
Larsen Creek 9000 6.3 6.8 93 26.2 -M *
South Pass 9040 31.8 12.2 261 33.8 21.2 159
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Basin Index (%) 217 170
LOWER N. PLATTE
Casper Mtn. 7900 9.1 11.7 78 19.0 19.3 98
Laprele Creek 8375 .4 3.4 12 15.5 16.0 97
Reno Hill 8400 9.2 11.0 84 19.1 20.0 96
Windy Peak 7900 .1 1.2 8 14.0 13.8 101
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Basin Index (%) 69 98
LARAMIE RIVER
Brooklyn Lake 10240 18.7 21.7 86 26.9 25.9 104
Cinnabar Park 9574 12.1 17.8 68 26.9 28.2 95
Crow Creek 8330 .0 .0 * 12.5 14.2 88
Deadman Hill 10220 20.2 18.6 109 24.9 21.6 115
Rawah 9020 1.2 3.0 40 20.8 18.0 116
Roach 9700 14.2 16.2 88 25.3 23.2 109
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Basin Index (%) 86 105
S. PLATTE
Black Mountain 8920 2.5 -M * 16.4 -M *
Crow Creek 8330 .0 .0 * 12.5 14.2 88
Deadman Hill 10220 20.2 18.6 109 24.9 21.6 115
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Basin Index (%) 109* 104
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * 19.5 17.8 110
Divide Peak 8880 7.2 14.9 48 26.1 25.4 103
Elk River 8700 .1 8.6 1 23.2 23.6 98
Little Snake River 8915 19.7 20.7 95 43.7 34.3 127
Old Battle 10000 38.1 36.6 104 43.3 40.7 106
Sage Creek Basin 7850 -M .0 * 18.2 16.8 108
Sandstone RS 8150 -M 2.2 * 19.5 21.7 90
Whiskey Park 8950 23.4 26.9 87 35.3 32.8 108
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Basin Index (%) 82 107
UPPER GREEN RIVER
Big Sandy Opening 9080 18.8 8.6 219 25.8 16.0 161
Blind Bull Sum 8650 -M 22.5 * 39.2 22.1 177
East Rim Divide 7930 1.9 6.2 31 23.0 13.5 170
Elkhart Park G.S. 9400 17.4 9.7 179 26.7 15.8 169
Gros Ventre Summit 8750 18.4 9.8 188 26.6 15.3 174
Gunsight Pass 9820 23.9 11.9 201 28.6 16.8 170
Kendall R.S. 7740 9.1 .0 * 31.4 16.1 195
Loomis Park 8240 19.3 7.6 254 34.9 19.7 177
New Fork Lake 8340 6.7 3.0 223 20.2 12.7 159
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 6.9 7.5 92 29.3 16.1 182
Spring Creek Divide 9000 44.3 23.8 186 44.8 27.0 166
Triple Peak 8500 31.7 15.1 210 44.9 29.0 155
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Basin Index (%) 192 171
LOWER GREEN RIVER
Blacks Fork Jct 8869 .2 -M * 18.8 -M *
Buck Pasture 9632 12.2 -M * 27.5 -M *
EF Blacks Fork GS 9360 6.8 -M * 22.1 -M *
Hams Fork 7840 1.8 .2 900* 23.9 13.7 174
Hewinta 9500 1.1 2.4 46 21.0 17.0 124
Hickerson Park 9122 .2 .5 40* 14.9 12.7 117
Hole-in-Rock 9168 .0 .3 0* 15.8 12.2 130
Indian Creek 9425 40.0 21.0 190 45.1 25.9 174
Kelley R.S. 8180 15.1 8.6 176 33.9 20.9 162
Spirit Lk 10235 10.7 -M * 21.0 -M *
Steel Creek Park 10158 19.8 17.8 111 25.3 20.0 126
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Basin Index (%) 154* 147
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 21.3 -M *
Bug Lake 7987 27.2 12.4 219 37.7 22.4 168
Burts Miller Ranch 8000 .0 -M * 12.0 -M *
Chalk Creek #1 9171 31.3 21.9 143 41.1 29.6 139
Hayden Fork 9130 7.2 6.3 114 33.0 24.7 134
Kelley R.S. 8180 15.1 8.6 176 33.9 20.9 162
Lily Lake 9133 6.8 6.2 110 23.1 20.4 113
Monte Cristo 8932 34.8 22.0 158 44.7 30.4 147
Salt River Summit 7760 11.0 5.1 216 31.9 19.0 168
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Basin Index (%) 162 147
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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.