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: DECEMBER 20 , 2016
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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 8.8 5.8 152 16.1 8.5 189
Black Bear 8170 13.2 14.2 93 22.6 15.1 150
Blind Bull Sum 8650 12.1 7.8 155 13.8 7.9 175
Cottonwood Creek 7670 8.5 7.0 121 15.5 9.5 163
East Rim Divide 7930 4.8 3.5 137 8.1 4.6 176
Grand Targhee 9260 20.8 14.3 145 20.3 12.7 160
Granite Creek 6770 7.4 4.7 157 13.7 7.8 176
Grassy Lake 7265 12.5 10.0 125 24.2 13.9 174
Gros Ventre Summit 8750 5.2 4.8 108 9.6 5.3 181
Gunsight Pass 9820 5.8 4.4 132 10.3 5.4 191
Lewis Lake Divide 7850 10.7 10.2 105 22.4 14.0 160
Phillips Bench 8200 8.5 8.7 98 17.7 10.6 167
Salt River Summit 7760 4.5 3.7 122 10.4 6.2 168
Snake River Station 6920 8.4 5.2 162 17.0 9.4 181
Spring Creek Divide 9000 10.7 8.1 132 16.0 9.2 174
Thumb Divide 7980 5.5 5.0 110 11.6 7.4 157
Togwotee Pass 9580 11.8 9.4 126 15.4 9.9 156
Two Ocean Plateau 9240 -M 10.8 * -M 10.9 *
Willow Creek 8380 10.0 8.8 114 20.4 13.2 155
Younts Peak 8350 6.6 5.7 116 11.4 6.6 173
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Basin Index (%) 124 167
MADISON-GALLATIN
Black Bear 8170 13.2 14.2 93 22.6 15.1 150
Canyon 7870 5.5 4.3 128 11.7 6.6 177
Madison Plateau 7750 7.1 8.5 84 17.2 10.3 167
West Yellowstone 6700 3.9 3.6 108 11.2 5.9 190
Whiskey Creek 6800 4.3 5.2 83 12.1 8.3 146
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Basin Index (%) 95 162
YELLOWSTONE
Beartooth Lake 9360 10.7 8.4 127 5.7 7.7 74
Burnt Mtn 5880 3.1 1.7 182 6.9 6.2 111
Canyon 7870 5.5 4.3 128 11.7 6.6 177
Cole Creek 7850 4.6 5.6 82 4.6 5.9 78
Evening Star 9200 12.5 9.4 133 18.4 11.3 163
Fisher Creek 9100 12.1 12.6 96 17.5 12.7 138
Northeast Entrance 7350 4.1 2.8 146 9.4 5.3 177
Parker Peak 9400 11.1 8.3 134 14.1 7.5 188
Sylvan Lake 8420 8.1 7.7 105 18.2 9.6 190
Thumb Divide 7980 5.5 5.0 110 11.6 7.4 157
Two Ocean Plateau 9240 -M 10.8 * -M 10.9 *
White Mill 8700 10.1 8.5 119 13.6 9.6 142
Wolverine 7650 5.1 3.6 142 8.8 5.4 163
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Basin Index (%) 119 148
WIND RIVER
Burroughs Creek 8750 6.8 -M * 9.4 -M *
Castle Creek 8400 3.9 -M * 6.0 -M *
Cold Springs 9630 3.6 2.8 129 6.1 4.5 136
Deer Park 9700 7.8 5.2 150 11.7 7.4 158
Hobbs Park 10100 7.1 5.9 120 8.2 5.5 149
Kirwin 9550 5.9 4.1 144 8.7 5.0 174
Little Warm 9370 3.5 3.8 92 8.2 5.4 152
Owl Creek 8975 2.2 2.3 96 3.7 2.6 142
South Pass 9040 7.6 5.5 138 8.4 7.2 117
St. Lawrence Alt 8620 1.9 2.5 76 5.3 3.9 136
Togwotee Pass 9580 11.8 9.4 126 15.4 9.9 156
Townsend Creek 8700 3.3 3.3 100 6.2 5.2 119
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Basin Index (%) 122 145
BIGHORN BASIN
Bald Mtn. 9380 9.2 7.1 130 8.1 6.8 119
Bear Trap Meadow 8200 1.5 2.2 68 3.4 3.8 89
Bone Springs Div 9350 6.3 6.4 98 7.3 6.2 118
Grave Springs 8550 2.3 2.7 85 3.9 4.4 89
Kirwin 9550 5.9 4.1 144 8.7 5.0 174
Marquette 8760 3.5 -M * 6.5 -M *
Middle Powder 7760 2.8 4.0 70 3.7 5.5 67
Owl Creek 8975 2.2 2.3 96 3.7 2.6 142
Powder River Pass 9480 1.6 3.9 41 4.5 5.1 88
Shell Creek 9580 6.9 6.3 110 6.0 5.8 103
Timber Creek 7950 2.6 1.9 137 4.0 3.6 111
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Basin Index (%) 101 109
SHOSHONE RIVER
Blackwater 9780 14.0 9.2 152 17.2 8.8 195
Evening Star 9200 12.5 9.4 133 18.4 11.3 163
Marquette 8760 3.5 -M * 6.5 -M *
Sylvan Road 7120 5.6 4.3 130 15.2 7.9 192
Younts Peak 8350 6.6 5.7 116 11.4 6.6 173
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Basin Index (%) 135 180
POWDER RIVER
Bear Trap Meadow 8200 1.5 2.2 68 3.4 3.8 89
Cloud Peak Reservoir 9860 3.6 5.1 71 5.9 5.6 105
Grave Springs 8550 2.3 2.7 85 3.9 4.4 89
Hansen Sawmill 8360 2.6 2.4 108 4.2 3.7 114
Middle Powder 7760 2.8 4.0 70 3.7 5.5 67
Powder River Pass 9480 1.6 3.9 41 4.5 5.1 88
Soldier Park 8720 2.7 -M * 4.8 -M *
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Basin Index (%) 71 91
TONGUE RIVER
Big Goose 7990 3.3 3.1 106 4.5 4.8 94
Bone Springs Div 9350 6.3 6.4 98 7.3 6.2 118
Burgess Junction 7880 3.4 4.0 85 5.1 5.2 98
Dome Lake 8880 3.4 4.6 74 5.9 6.1 97
Little Goose 8870 3.6 -M * 5.6 -M *
Sucker Creek 8880 4.2 4.2 100 5.1 6.0 85
Tie Creek 6870 2.7 1.2 225 5.6 4.9 114
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Basin Index (%) 99 101
BELLE FOURCHE
Cole Canyon 5910 2.1 1.0 210 3.4 4.2 81
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Basin Index (%) 210 81
CHEYENNE RIVER BASIN
Blind Park 6890 3.0 2.3 130 4.2 5.2 81
North Rapid Creek 6130 2.8 2.5 112 3.1 4.4 70
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Basin Index (%) 121 76
UPPER N. PLATTE
Arapaho Ridge 10960 9.3 8.0 116 11.2 9.4 119
Blackhall Mtn 9820 10.8 -M * 13.0 -M *
Columbine 9160 8.6 7.3 118 10.9 9.9 110
Divide Peak 8880 5.8 6.8 85 8.1 8.9 91
Joe Wright 10120 6.4 8.3 77 11.3 10.6 107
Laprele Creek 8375 3.7 3.2 116 4.0 5.2 77
Med Bow 10500 13.6 -M * 14.2 -M *
North French Creek 10130 8.3 10.0 83 10.3 10.4 99
Never Summer 10280 7.9 7.2 110 8.3 -M *
Old Battle 10000 10.1 10.9 93 11.3 14.0 81
Rawah 9020 4.7 3.7 127 7.3 6.4 114
Sage Creek Basin 7850 4.1 4.4 93 5.6 6.1 92
Sand Lake 10050 9.4 9.7 97 9.5 9.8 97
South Brush Creek 8440 3.0 4.1 73 4.6 6.3 73
Tower 10500 12.7 17.1 74 15.8 16.0 99
Webber Springs 9250 7.7 8.2 94 11.3 10.7 106
Willow Creek Pass 9540 6.5 4.8 135 7.5 5.7 132
Zirkel 9340 10.4 7.8 133 14.1 11.8 119
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Basin Index (%) 98 101
SWEETWATER
Deer Park 9700 7.8 5.2 150 11.7 7.4 158
Larsen Creek 9000 5.9 4.0 148 10.0 -M *
South Pass 9040 7.6 5.5 138 8.4 7.2 117
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Basin Index (%) 145 138
LOWER N. PLATTE
Casper Mtn. 7900 3.8 5.0 76 4.6 6.6 70
Laprele Creek 8375 3.7 3.2 116 4.0 5.2 77
Reno Hill 8400 -M 5.1 * -M 6.3 *
Windy Peak 7900 3.2 2.7 119 4.1 4.6 89
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Basin Index (%) 98 77
LARAMIE RIVER
Brooklyn Lake 10240 6.9 6.9 100 7.4 7.9 94
Cinnabar Park 9574 6.4 7.5 85 9.0 9.8 92
Crow Creek 8330 2.2 3.8 58 3.7 4.6 80
Deadman Hill 10220 6.9 6.1 113 7.4 6.7 110
Rawah 9020 4.7 3.7 127 7.3 6.4 114
Roach 9700 4.9 5.6 88 6.6 7.7 86
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Basin Index (%) 95 96
S. PLATTE
Black Mountain 8920 3.6 -M * 5.2 -M *
Crow Creek 8330 2.2 3.8 58 3.7 4.6 80
Deadman Hill 10220 6.9 6.1 113 7.4 6.7 110
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Basin Index (%) 92 98
LITTLE SNAKE RIVER
Battle Mountain 7440 3.2 3.1 103 6.2 6.1 102
Divide Peak 8880 5.8 6.8 85 8.1 8.9 91
Elk River 8700 7.2 5.3 136 8.3 7.7 108
Little Snake River 8915 9.9 6.6 150 14.8 12.6 117
Old Battle 10000 10.1 10.9 93 11.3 14.0 81
Sage Creek Basin 7850 4.1 4.4 93 5.6 6.1 92
Sandstone RS 8150 4.5 3.8 118 5.3 7.4 72
Whiskey Park 8950 8.0 8.0 100 11.4 10.3 111
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Basin Index (%) 108 97
UPPER GREEN RIVER
Big Sandy Opening 9080 7.3 4.7 155 10.1 5.3 191
Blind Bull Sum 8650 12.1 7.8 155 13.8 7.9 175
East Rim Divide 7930 4.8 3.5 137 8.1 4.6 176
Elkhart Park G.S. 9400 4.5 4.5 100 9.9 5.4 183
Gros Ventre Summit 8750 5.2 4.8 108 9.6 5.3 181
Gunsight Pass 9820 5.8 4.4 132 10.3 5.4 191
Kendall R.S. 7740 6.6 3.9 169 10.8 5.4 200
Loomis Park 8240 7.7 5.1 151 12.9 6.7 193
New Fork Lake 8340 5.2 3.5 149 6.3 4.4 143
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 5.0 4.2 119 10.4 5.5 189
Spring Creek Divide 9000 10.7 8.1 132 16.0 9.2 174
Triple Peak 8500 12.3 7.1 173 17.2 9.3 185
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Basin Index (%) 142 182
LOWER GREEN RIVER
Blacks Fork Jct 8870 4.1 -M * 5.8 -M *
Buck Pasture 9700 5.8 -M * 8.5 -M *
EF Blacks Fork GS 9360 5.3 -M * 5.9 -M *
Hams Fork 7840 4.4 3.5 126 8.1 4.4 184
Hewinta 9519 4.0 3.1 129 6.4 5.8 110
Hickerson Park 9145 3.4 2.1 162 3.9 4.5 87
Hole-in-Rock 9150 2.3 2.4 96 4.3 4.2 102
Indian Creek 9425 10.1 8.5 119 14.2 8.3 171
Kelley R.S. 8180 7.1 4.8 148 12.7 7.0 181
Spirit Lk 10235 4.3 -M * 6.8 -M *
Steel Creek Park 10200 5.9 5.5 107 7.8 6.6 118
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Basin Index (%) 124 141
UPPER BEAR RIVER
Bear River RS 8777 4.0 -M * 6.1 -M *
Bug Lake 7950 9.0 5.4 167 10.4 7.7 135
Burts Miller Ranch 8000 2.3 -M * 3.4 -M *
Chalk Creek #1 8993 9.7 8.8 110 11.9 10.1 118
Hayden Fork 9212 6.9 4.5 153 10.9 8.2 133
Kelley R.S. 8180 7.1 4.8 148 12.7 7.0 181
Lily Lake 9156 4.6 4.5 102 6.8 7.1 96
Monte Cristo 8960 9.3 8.5 109 12.7 10.0 127
Salt River Summit 7760 4.5 3.7 122 10.4 6.2 168
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Basin Index (%) 127 135
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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.