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: DECEMBER 19 , 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 8.7 5.7 153 15.9 8.4 189
Black Bear 8170 13.1 14.0 94 22.3 14.8 151
Blind Bull Sum 8650 11.6 7.6 153 13.4 7.8 172
Cottonwood Creek 7670 8.2 6.8 121 14.8 9.4 157
East Rim Divide 7930 4.6 3.5 131 7.9 4.6 172
Grand Targhee 9260 20.6 14.1 146 19.6 12.6 156
Granite Creek 6770 7.2 4.6 157 13.6 7.7 177
Grassy Lake 7265 12.3 9.9 124 23.8 13.8 172
Gros Ventre Summit 8750 5.1 4.8 106 9.2 5.2 177
Gunsight Pass 9820 5.7 4.3 133 10.0 5.3 189
Lewis Lake Divide 7850 10.3 10.0 103 21.7 13.8 157
Phillips Bench 8200 7.9 8.5 93 17.5 10.4 168
Salt River Summit 7760 4.2 3.6 117 9.8 6.1 161
Snake River Station 6920 8.3 5.1 163 16.9 9.3 182
Spring Creek Divide 9000 10.4 8.0 130 15.7 9.0 174
Thumb Divide 7980 5.3 4.9 108 11.4 7.4 154
Togwotee Pass 9580 11.6 9.3 125 15.2 9.8 155
Two Ocean Plateau 9240 16.0 10.7 150 17.6 10.8 163
Willow Creek 8380 9.5 8.6 110 20.2 13.1 154
Younts Peak 8350 6.4 5.6 114 11.2 6.5 172
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Basin Index (%) 125 166
MADISON-GALLATIN
Black Bear 8170 13.1 14.0 94 22.3 14.8 151
Canyon 7870 5.6 4.2 133 11.6 6.5 178
Madison Plateau 7750 7.0 8.3 84 16.9 10.2 166
West Yellowstone 6700 3.7 3.5 106 11.2 5.8 193
Whiskey Creek 6800 4.1 5.1 80 12.0 8.2 146
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Basin Index (%) 95 163
YELLOWSTONE
Beartooth Lake 9360 10.4 8.3 125 5.4 7.7 70
Burnt Mtn 5880 3.0 1.7 176 6.8 6.1 111
Canyon 7870 5.6 4.2 133 11.6 6.5 178
Cole Creek 7850 4.4 5.6 79 4.4 5.9 75
Evening Star 9200 12.2 9.2 133 18.2 11.2 162
Fisher Creek 9100 11.8 12.4 95 17.2 12.5 138
Northeast Entrance 7350 4.0 2.8 143 9.3 5.3 175
Parker Peak 9400 10.7 8.1 132 13.9 7.4 188
Sylvan Lake 8420 8.0 7.6 105 18.0 9.5 189
Thumb Divide 7980 5.3 4.9 108 11.4 7.4 154
Two Ocean Plateau 9240 16.0 10.7 150 17.6 10.8 163
White Mill 8700 9.9 8.3 119 13.4 9.5 141
Wolverine 7650 4.9 3.5 140 8.6 5.4 159
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Basin Index (%) 122 148
WIND RIVER
Burroughs Creek 8750 6.8 -M * 9.0 -M *
Castle Creek 8400 3.7 -M * 5.7 -M *
Cold Springs 9630 3.4 2.8 121 5.9 4.4 134
Deer Park 9700 7.8 5.1 153 11.5 7.4 155
Hobbs Park 10100 6.8 5.9 115 7.8 5.5 142
Kirwin 9550 5.9 4.0 148 8.4 4.9 171
Little Warm 9370 3.3 3.8 87 8.0 5.3 151
Owl Creek 8975 2.1 2.2 95 3.5 2.6 135
South Pass 9040 7.5 5.4 139 8.3 7.2 115
St. Lawrence Alt 8620 1.5 2.6 58 5.1 3.9 131
Togwotee Pass 9580 11.6 9.3 125 15.2 9.8 155
Townsend Creek 8700 2.9 3.3 88 5.7 5.2 110
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Basin Index (%) 119 141
BIGHORN BASIN
Bald Mtn. 9380 9.1 7.0 130 7.8 6.8 115
Bear Trap Meadow 8200 1.3 2.1 62 3.2 3.8 84
Bone Springs Div 9350 6.2 6.3 98 7.2 6.1 118
Grave Springs 8550 2.1 2.6 81 3.7 4.4 84
Kirwin 9550 5.9 4.0 148 8.4 4.9 171
Marquette 8760 3.8 -M * 6.4 -M *
Middle Powder 7760 2.7 3.9 69 3.4 5.4 63
Owl Creek 8975 2.1 2.2 95 3.5 2.6 135
Powder River Pass 9480 1.6 3.8 42 4.2 5.1 82
Shell Creek 9580 6.8 6.2 110 5.7 5.7 100
Timber Creek 7950 2.6 1.9 137 4.0 3.6 111
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Basin Index (%) 101 106
SHOSHONE RIVER
Blackwater 9780 13.9 9.1 153 16.8 8.6 195
Evening Star 9200 12.2 9.2 133 18.2 11.2 162
Marquette 8760 3.8 -M * 6.4 -M *
Sylvan Road 7120 5.5 4.2 131 15.1 7.8 194
Younts Peak 8350 6.4 5.6 114 11.2 6.5 172
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Basin Index (%) 135 180
POWDER RIVER
Bear Trap Meadow 8200 1.3 2.1 62 3.2 3.8 84
Cloud Peak Reservoir 9860 3.4 5.1 67 5.7 5.6 102
Grave Springs 8550 2.1 2.6 81 3.7 4.4 84
Hansen Sawmill 8360 2.4 2.4 100 4.1 3.6 114
Middle Powder 7760 2.7 3.9 69 3.4 5.4 63
Powder River Pass 9480 1.6 3.8 42 4.2 5.1 82
Soldier Park 8720 2.2 -M * 4.5 -M *
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Basin Index (%) 68 87
TONGUE RIVER
Big Goose 7990 3.1 3.1 100 4.4 4.7 94
Bone Springs Div 9350 6.2 6.3 98 7.2 6.1 118
Burgess Junction 7880 3.3 3.9 85 4.8 5.1 94
Dome Lake 8880 3.0 4.5 67 5.8 6.0 97
Little Goose 8870 3.5 -M * 5.5 -M *
Sucker Creek 8880 4.1 4.2 98 4.8 5.9 81
Tie Creek 6870 2.7 1.2 225 5.5 4.9 112
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Basin Index (%) 97 99
BELLE FOURCHE
Cole Canyon 5910 2.1 1.0 210 3.3 4.1 80
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Basin Index (%) 210 80
CHEYENNE RIVER BASIN
Blind Park 6890 2.8 2.2 127 4.2 5.2 81
North Rapid Creek 6130 2.6 2.4 108 2.8 4.3 65
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Basin Index (%) 117 74
UPPER N. PLATTE
Arapaho Ridge 10960 9.2 7.8 118 11.1 9.3 119
Blackhall Mtn 9820 10.7 -M * 12.7 -M *
Columbine 9160 8.6 7.1 121 10.2 9.7 105
Divide Peak 8880 5.6 6.6 85 7.8 8.8 89
Joe Wright 10120 6.2 8.2 76 11.2 10.4 108
Laprele Creek 8375 3.3 3.1 106 3.7 5.1 73
Med Bow 10500 13.3 -M * 13.9 -M *
North French Creek 10130 7.9 9.8 81 10.1 10.2 99
Never Summer 10280 7.6 7.0 109 8.0 -M *
Old Battle 10000 10.0 10.7 93 10.7 13.7 78
Rawah 9020 4.7 3.7 127 7.0 6.2 113
Sage Creek Basin 7850 3.9 4.3 91 5.5 6.0 92
Sand Lake 10050 9.1 9.6 95 9.2 9.6 96
South Brush Creek 8440 2.8 4.0 70 4.0 6.2 65
Tower 10500 12.6 16.8 75 15.4 15.7 98
Webber Springs 9250 7.5 8.1 93 12.2 10.5 116
Willow Creek Pass 9540 6.4 4.7 136 7.2 5.6 129
Zirkel 9340 10.3 7.7 134 13.9 11.5 121
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Basin Index (%) 97 101
SWEETWATER
Deer Park 9700 7.8 5.1 153 11.5 7.4 155
Larsen Creek 9000 5.5 3.9 141 9.9 -M *
South Pass 9040 7.5 5.4 139 8.3 7.2 115
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Basin Index (%) 144 136
LOWER N. PLATTE
Casper Mtn. 7900 3.5 4.9 71 4.4 6.6 67
Laprele Creek 8375 3.3 3.1 106 3.7 5.1 73
Reno Hill 8400 -M 5.0 * -M 6.2 *
Windy Peak 7900 3.2 2.6 123 3.9 4.5 87
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Basin Index (%) 94 74
LARAMIE RIVER
Brooklyn Lake 10240 6.7 6.8 99 7.1 7.8 91
Cinnabar Park 9574 6.2 7.5 83 8.8 9.6 92
Crow Creek 8330 2.3 3.7 62 3.5 4.6 76
Deadman Hill 10220 6.7 6.0 112 7.3 6.6 111
Rawah 9020 4.7 3.7 127 7.0 6.2 113
Roach 9700 -M 5.5 * -M 7.5 *
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Basin Index (%) 96 97
S. PLATTE
Black Mountain 8920 3.5 -M * 5.2 -M *
Crow Creek 8330 2.3 3.7 62 3.5 4.6 76
Deadman Hill 10220 6.7 6.0 112 7.3 6.6 111
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Basin Index (%) 93 96
LITTLE SNAKE RIVER
Battle Mountain 7440 3.2 3.0 107 -M 6.0 *
Divide Peak 8880 5.6 6.6 85 7.8 8.8 89
Elk River 8700 7.2 5.2 138 8.3 7.6 109
Little Snake River 8915 9.5 6.4 148 14.3 12.4 115
Old Battle 10000 10.0 10.7 93 10.7 13.7 78
Sage Creek Basin 7850 3.9 4.3 91 5.5 6.0 92
Sandstone RS 8150 4.5 3.7 122 4.7 7.2 65
Whiskey Park 8950 7.5 7.8 96 11.2 10.1 111
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Basin Index (%) 108 95
UPPER GREEN RIVER
Big Sandy Opening 9080 7.0 4.7 149 9.9 5.3 187
Blind Bull Sum 8650 11.6 7.6 153 13.4 7.8 172
East Rim Divide 7930 4.6 3.5 131 7.9 4.6 172
Elkhart Park G.S. 9400 4.3 4.5 96 9.7 5.4 180
Gros Ventre Summit 8750 5.1 4.8 106 9.2 5.2 177
Gunsight Pass 9820 5.7 4.3 133 10.0 5.3 189
Kendall R.S. 7740 6.4 3.8 168 10.8 5.4 200
Loomis Park 8240 7.4 5.0 148 12.7 6.6 192
New Fork Lake 8340 5.0 3.4 147 5.9 4.3 137
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 4.8 4.0 120 10.1 5.4 187
Spring Creek Divide 9000 10.4 8.0 130 15.7 9.0 174
Triple Peak 8500 12.1 6.9 175 16.9 9.2 184
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Basin Index (%) 140 180
LOWER GREEN RIVER
Blacks Fork Jct 8870 3.7 -M * 5.8 -M *
Buck Pasture 9700 5.4 -M * 8.4 -M *
EF Blacks Fork GS 9360 5.0 -M * 5.6 -M *
Hams Fork 7840 3.9 3.5 111 7.9 4.4 180
Hewinta 9519 3.8 3.0 127 6.1 5.8 105
Hickerson Park 9145 3.3 2.1 157 3.5 4.4 80
Hole-in-Rock 9150 2.1 2.3 91 4.1 4.2 98
Indian Creek 9425 9.9 8.3 119 13.8 8.2 168
Kelley R.S. 8180 6.8 4.7 145 12.3 7.0 176
Spirit Lk 10235 4.2 -M * 6.5 -M *
Steel Creek Park 10200 5.6 5.5 102 7.8 6.6 118
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Basin Index (%) 120 137
UPPER BEAR RIVER
Bear River RS 8777 4.0 -M * 5.9 -M *
Bug Lake 7950 9.0 5.3 170 10.3 7.6 136
Burts Miller Ranch 8000 2.3 -M * 3.1 -M *
Chalk Creek #1 8993 9.6 8.6 112 11.9 10.0 119
Hayden Fork 9212 6.9 4.4 157 10.8 8.2 132
Kelley R.S. 8180 6.8 4.7 145 12.3 7.0 176
Lily Lake 9156 4.4 4.4 100 6.8 7.0 97
Monte Cristo 8960 9.2 8.4 110 12.4 9.9 125
Salt River Summit 7760 4.2 3.6 117 9.8 6.1 161
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Basin Index (%) 127 133
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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.