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 16 , 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 8.4 .0 * 42.3 24.1 176
Black Bear 8170 44.9 35.8 125 60.1 44.1 136
Blind Bull Sum 8650 -M 21.8 * 39.2 22.9 171
Cottonwood Creek 7670 18.4 9.6 192 44.1 29.5 149
East Rim Divide 7930 .0 3.3 0 23.1 13.9 166
Grand Targhee 9260 54.7 44.6 123 51.8 36.7 141
Granite Creek 6770 10.0 .4 2500* 38.4 22.6 170
Grassy Lake 7265 25.8 21.3 121 61.5 41.3 149
Gros Ventre Summit 8750 -M 8.2 * -M 15.8 *
Gunsight Pass 9820 19.9 12.0 166 28.7 17.5 164
Lewis Lake Divide 7850 36.9 25.3 146 59.8 40.5 148
Phillips Bench 8200 31.9 21.5 148 50.8 32.5 156
Salt River Summit 7760 3.6 1.0 360* 31.9 19.6 163
Snake River Station 6920 .0 .0 * 39.2 26.1 150
Spring Creek Divide 9000 38.2 22.3 171 44.9 27.8 162
Thumb Divide 7980 5.1 4.3 119 30.6 22.4 137
Togwotee Pass 9580 31.9 24.1 132 43.3 29.2 148
Two Ocean Plateau 9240 -M 29.1 * -M 32.3 *
Willow Creek 8380 -M 19.3 * 57.7 40.3 143
Younts Peak 8350 3.2 13.3 24 33.5 19.2 174
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Basin Index (%) 139 153
MADISON-GALLATIN
Black Bear 8170 44.9 35.8 125 60.1 44.1 136
Canyon 7870 8.7 4.8 181 28.9 19.5 148
Madison Plateau 7750 19.2 16.5 116 40.2 30.9 130
West Yellowstone 6700 .0 .0 * 26.0 17.2 151
Whiskey Creek 6800 4.7 8.1 58 30.0 23.8 126
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Basin Index (%) 119 137
YELLOWSTONE
Beartooth Lake 9360 32.5 22.5 144 31.9 23.8 134
Burnt Mtn 5880 .0 .0 * 18.7 18.8 99
Canyon 7870 8.7 4.8 181 28.9 19.5 148
Cole Creek 7850 11.8 16.9 70 14.4 19.0 76
Evening Star 9200 34.7 25.1 138 49.6 32.7 152
Fisher Creek 9100 -M 33.9 * 52.9 37.7 140
Northeast Entrance 7350 .0 .0 * 23.2 15.1 154
Parker Peak 9400 34.7 21.3 163 40.1 22.0 182
Sylvan Lake 8420 16.6 16.7 99 42.1 27.1 155
Thumb Divide 7980 5.1 4.3 119 30.6 22.4 137
Two Ocean Plateau 9240 -M 29.1 * -M 32.3 *
White Mill 8700 33.5 24.1 139 40.0 28.4 141
Wolverine 7650 -M .0 * 23.6 15.2 155
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Basin Index (%) 131 141
WIND RIVER
Burroughs Creek 8750 8.7 -M * 29.3 -M *
Castle Creek 8400 .0 -M * 17.9 -M *
Cold Springs 9630 5.1 .0 * 22.5 14.1 160
Deer Park 9700 29.8 13.0 229 43.5 25.6 170
Hobbs Park 10100 29.7 14.6 203 34.8 18.7 186
Kirwin 9550 18.9 10.1 187 29.3 15.5 189
Little Warm 9370 11.9 5.6 212 27.6 17.0 162
Owl Creek 8975 .0 .0 * 15.6 9.3 168
South Pass 9040 26.5 9.7 273 33.9 22.2 153
St. Lawrence Alt 8620 .0 .0 * 20.8 13.2 158
Togwotee Pass 9580 31.9 24.1 132 43.3 29.2 148
Townsend Creek 8700 11.5 .6 1917* 28.5 16.7 171
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Basin Index (%) 213 165
BIGHORN BASIN
Bald Mtn. 9380 19.9 20.5 97 21.6 21.7 100
Bear Trap Meadow 8200 .0 .0 * 15.1 12.2 124
Bone Springs Div 9350 18.1 15.6 116 22.5 20.4 110
Grave Springs 8550 4.1 5.9 69 13.8 14.8 93
Kirwin 9550 18.9 10.1 187 29.3 15.5 189
Marquette 8760 13.6 -M * 23.8 -M *
Middle Powder 7760 4.2 8.3 51 15.2 15.9 96
Owl Creek 8975 .0 .0 * 15.6 9.3 168
Powder River Pass 9480 3.2 8.0 40 18.2 16.8 108
Shell Creek 9580 14.0 16.4 85 18.9 18.2 104
Timber Creek 7950 .0 .0 * 15.2 11.8 129
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Basin Index (%) 97 118
SHOSHONE RIVER
Blackwater 9780 38.9 24.9 156 46.7 25.4 184
Evening Star 9200 34.7 25.1 138 49.6 32.7 152
Marquette 8760 13.6 -M * 23.8 -M *
Sylvan Road 7120 .0 .0 * 32.4 19.9 163
Younts Peak 8350 3.2 13.3 24 33.5 19.2 174
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Basin Index (%) 121 167
POWDER RIVER
Bear Trap Meadow 8200 .0 .0 * 15.1 12.2 124
Cloud Peak Reservoir 9860 16.9 16.1 105 26.6 19.1 139
Grave Springs 8550 4.1 5.9 69 13.8 14.8 93
Hansen Sawmill 8360 6.6 .0 * 18.7 12.5 150
Middle Powder 7760 4.2 8.3 51 15.2 15.9 96
Powder River Pass 9480 3.2 8.0 40 18.2 16.8 108
Soldier Park 8720 7.6 -M * 20.8 -M *
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Basin Index (%) 91 118
TONGUE RIVER
Big Goose 7990 8.1 8.2 99 20.3 16.7 122
Bone Springs Div 9350 18.1 15.6 116 22.5 20.4 110
Burgess Junction 7880 6.7 10.2 66 16.3 16.6 98
Dome Lake 8880 13.4 9.2 146 22.7 18.6 122
Little Goose 8870 10.9 -M * 24.4 -M *
Sucker Creek 8880 9.7 10.8 90 19.2 19.8 97
Tie Creek 6870 .1 .0 * 20.2 16.9 120
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Basin Index (%) 104 111
BELLE FOURCHE
Cole Canyon 5910 .0 .0 * 12.5 14.5 86
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Basin Index (%) * 86
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 13.2 16.3 81
North Rapid Creek 6130 .0 .0 * 11.3 14.2 80
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Basin Index (%) * 80
UPPER N. PLATTE
Arapaho Ridge 10960 20.5 21.1 97 30.4 28.4 107
Blackhall Mtn 9820 28.5 -M * 42.0 -M *
Columbine 9160 .0 7.5 0 32.4 30.3 107
Divide Peak 8880 .0 9.6 0 26.6 26.1 102
Joe Wright 10120 13.5 22.6 60 33.9 32.3 105
Laprele Creek 8375 .3 .0 * 16.0 16.5 97
Med Bow 10500 35.7 -M * 41.3 -M *
North French Creek 10130 21.7 31.8 68 34.3 33.2 103
Never Summer 10280 21.1 22.0 96 23.2 -M *
Old Battle 10000 35.3 34.5 102 43.6 41.6 105
Rawah 9020 .1 1.2 8 20.8 18.8 111
Sage Creek Basin 7850 -M .0 * 18.3 17.2 106
Sand Lake 10050 30.2 29.9 101 32.2 31.4 103
South Brush Creek 8440 .0 1.0 0* 17.0 19.7 86
Tower 10500 37.8 49.5 76 52.0 47.3 110
Webber Springs 9250 11.9 15.6 76 37.5 31.8 118
Willow Creek Pass 9540 12.4 11.0 113 21.0 17.1 123
Zirkel 9340 11.4 15.6 73 47.4 33.3 142
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Basin Index (%) 79 109
SWEETWATER
Deer Park 9700 29.8 13.0 229 43.5 25.6 170
Larsen Creek 9000 .3 4.7 6 26.2 -M *
South Pass 9040 26.5 9.7 273 33.9 22.2 153
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Basin Index (%) 207 162
LOWER N. PLATTE
Casper Mtn. 7900 .8 8.3 10 20.0 20.0 100
Laprele Creek 8375 .3 .0 * 16.0 16.5 97
Reno Hill 8400 1.2 7.2 17 20.2 21.0 96
Windy Peak 7900 .0 .0 * 15.4 14.3 108
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Basin Index (%) 15 100
LARAMIE RIVER
Brooklyn Lake 10240 13.3 19.2 69 27.0 26.7 101
Cinnabar Park 9574 6.3 14.8 43 27.0 29.3 92
Crow Creek 8330 .0 .0 * 12.5 15.0 83
Deadman Hill 10220 15.0 18.2 82 25.3 22.5 112
Rawah 9020 .1 1.2 8 20.8 18.8 111
Roach 9700 8.6 13.5 64 25.8 24.1 107
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Basin Index (%) 65 101
S. PLATTE
Black Mountain 8920 -M -M * 16.8 -M *
Crow Creek 8330 .0 .0 * 12.5 15.0 83
Deadman Hill 10220 15.0 18.2 82 25.3 22.5 112
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Basin Index (%) 82* 101
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * 19.7 18.4 107
Divide Peak 8880 .0 9.6 0 26.6 26.1 102
Elk River 8700 .1 2.2 5 23.2 24.3 95
Little Snake River 8915 12.0 17.3 69 43.8 35.0 125
Old Battle 10000 35.3 34.5 102 43.6 41.6 105
Sage Creek Basin 7850 -M .0 * 18.3 17.2 106
Sandstone RS 8150 .0 .0 * 19.6 22.3 88
Whiskey Park 8950 15.4 24.2 64 35.4 33.6 105
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Basin Index (%) 72 105
UPPER GREEN RIVER
Big Sandy Opening 9080 12.2 7.0 174 25.8 16.6 155
Blind Bull Sum 8650 -M 21.8 * 39.2 22.9 171
East Rim Divide 7930 .0 3.3 0 23.1 13.9 166
Elkhart Park G.S. 9400 12.3 8.0 154 26.9 16.5 163
Gros Ventre Summit 8750 -M 8.2 * -M 15.8 *
Gunsight Pass 9820 19.9 12.0 166 28.7 17.5 164
Kendall R.S. 7740 .0 .0 * 31.3 16.5 190
Loomis Park 8240 13.9 5.4 257 35.2 20.3 173
New Fork Lake 8340 .0 .7 0* 21.2 13.3 159
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 .0 3.9 0 29.3 16.6 177
Spring Creek Divide 9000 38.2 22.3 171 44.9 27.8 162
Triple Peak 8500 24.2 12.0 202 44.8 29.9 150
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Basin Index (%) 162 165
LOWER GREEN RIVER
Blacks Fork Jct 8869 .1 -M * 19.1 -M *
Buck Pasture 9632 5.3 -M * 27.7 -M *
EF Blacks Fork GS 9360 -M -M * 23.1 -M *
Hams Fork 7840 .0 .0 * 24.0 14.2 169
Hewinta 9500 .0 .0 * 21.2 17.5 121
Hickerson Park 9122 .1 .0 * 15.0 13.2 114
Hole-in-Rock 9168 .0 .0 * 15.8 12.8 123
Indian Creek 9425 33.8 20.9 162 45.1 26.7 169
Kelley R.S. 8180 7.3 5.8 126 34.1 21.5 159
Spirit Lk 10235 3.6 -M * 21.0 -M *
Steel Creek Park 10158 15.7 16.1 98 25.5 20.7 123
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Basin Index (%) 133* 143
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 21.5 -M *
Bug Lake 7987 20.1 9.4 214 37.7 23.2 162
Burts Miller Ranch 8000 .0 -M * 11.9 -M *
Chalk Creek #1 9171 23.5 18.7 126 41.2 30.5 135
Hayden Fork 9130 .1 2.1 5 32.5 25.5 127
Kelley R.S. 8180 7.3 5.8 126 34.1 21.5 159
Lily Lake 9133 .0 .7 0* 23.1 21.1 109
Monte Cristo 8932 27.2 18.4 148 44.8 31.3 143
Salt River Summit 7760 3.6 1.0 360* 31.9 19.6 163
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Basin Index (%) 146 142
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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.