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 SUNDAY: DECEMBER 18 , 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 5.6 155 15.9 8.3 192
Black Bear 8170 12.9 13.7 94 22.2 14.6 152
Blind Bull Sum 8650 11.7 7.5 156 13.5 7.7 175
Cottonwood Creek 7670 8.3 6.7 124 15.0 9.3 161
East Rim Divide 7930 4.6 3.3 139 7.8 4.5 173
Grand Targhee 9260 20.5 13.9 147 19.3 12.4 156
Granite Creek 6770 7.2 4.5 160 13.7 7.6 180
Grassy Lake 7265 12.3 9.7 127 23.7 13.7 173
Gros Ventre Summit 8750 5.1 4.7 109 9.1 5.2 175
Gunsight Pass 9820 5.4 4.3 126 9.7 5.2 187
Lewis Lake Divide 7850 10.5 9.8 107 21.7 13.7 158
Phillips Bench 8200 8.0 8.4 95 17.5 10.4 168
Salt River Summit 7760 4.2 3.5 120 9.9 6.1 162
Snake River Station 6920 8.3 5.0 166 16.9 9.2 184
Spring Creek Divide 9000 10.3 8.0 129 15.6 8.9 175
Thumb Divide 7980 5.2 4.7 111 11.3 7.3 155
Togwotee Pass 9580 11.6 9.2 126 15.1 9.6 157
Two Ocean Plateau 9240 15.9 10.6 150 17.4 10.7 163
Willow Creek 8380 9.6 8.5 113 20.2 13.0 155
Younts Peak 8350 6.2 5.6 111 10.7 6.4 167
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Basin Index (%) 127 167
MADISON-GALLATIN
Black Bear 8170 12.9 13.7 94 22.2 14.6 152
Canyon 7870 5.6 4.1 137 11.6 6.5 178
Madison Plateau 7750 7.0 8.1 86 16.9 10.1 167
West Yellowstone 6700 3.5 3.4 103 11.1 5.7 195
Whiskey Creek 6800 4.0 4.9 82 11.8 8.1 146
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Basin Index (%) 96 164
YELLOWSTONE
Beartooth Lake 9360 10.3 8.1 127 5.3 7.6 70
Burnt Mtn 5880 2.9 1.7 171 6.7 6.1 110
Canyon 7870 5.6 4.1 137 11.6 6.5 178
Cole Creek 7850 4.2 5.6 75 4.3 5.8 74
Evening Star 9200 12.1 9.1 133 17.9 11.1 161
Fisher Creek 9100 11.8 12.1 98 17.0 12.4 137
Northeast Entrance 7350 4.0 2.7 148 9.3 5.2 179
Parker Peak 9400 10.4 8.0 130 13.8 7.3 189
Sylvan Lake 8420 8.0 7.5 107 18.0 9.4 191
Thumb Divide 7980 5.2 4.7 111 11.3 7.3 155
Two Ocean Plateau 9240 15.9 10.6 150 17.4 10.7 163
White Mill 8700 9.9 8.2 121 13.2 9.4 140
Wolverine 7650 5.0 3.5 143 8.5 5.3 160
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Basin Index (%) 123 148
WIND RIVER
Burroughs Creek 8750 6.7 -M * 8.7 -M *
Castle Creek 8400 3.7 -M * 5.5 -M *
Cold Springs 9630 3.3 2.7 122 5.7 4.4 130
Deer Park 9700 7.8 5.1 153 11.3 7.4 153
Hobbs Park 10100 6.7 5.9 114 7.7 5.4 143
Kirwin 9550 5.7 4.0 142 8.1 4.8 169
Little Warm 9370 3.0 3.8 79 7.7 5.3 145
Owl Creek 8975 2.0 2.2 91 3.4 2.6 131
South Pass 9040 7.5 5.4 139 8.1 7.1 114
St. Lawrence Alt 8620 1.3 2.6 50 5.0 3.8 132
Togwotee Pass 9580 11.6 9.2 126 15.1 9.6 157
Townsend Creek 8700 2.9 3.3 88 5.7 5.2 110
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Basin Index (%) 117 140
BIGHORN BASIN
Bald Mtn. 9380 8.9 6.9 129 7.5 6.7 112
Bear Trap Meadow 8200 1.0 2.1 48 3.0 3.8 79
Bone Springs Div 9350 6.3 6.2 102 7.0 6.0 117
Grave Springs 8550 2.1 2.5 84 3.7 4.3 86
Kirwin 9550 5.7 4.0 142 8.1 4.8 169
Marquette 8760 3.8 -M * 6.3 -M *
Middle Powder 7760 2.6 3.8 68 3.2 5.4 59
Owl Creek 8975 2.0 2.2 91 3.4 2.6 131
Powder River Pass 9480 1.5 3.8 39 4.0 5.0 80
Shell Creek 9580 6.6 6.1 108 5.5 5.6 98
Timber Creek 7950 2.5 1.9 132 3.8 3.6 106
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Basin Index (%) 99 103
SHOSHONE RIVER
Blackwater 9780 13.8 9.0 153 16.4 8.5 193
Evening Star 9200 12.1 9.1 133 17.9 11.1 161
Marquette 8760 3.8 -M * 6.3 -M *
Sylvan Road 7120 5.5 4.1 134 15.0 7.7 195
Younts Peak 8350 6.2 5.6 111 10.7 6.4 167
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Basin Index (%) 135 178
POWDER RIVER
Bear Trap Meadow 8200 1.0 2.1 48 3.0 3.8 79
Cloud Peak Reservoir 9860 3.3 5.0 66 5.2 5.6 93
Grave Springs 8550 2.1 2.5 84 3.7 4.3 86
Hansen Sawmill 8360 2.3 2.3 100 4.0 3.6 111
Middle Powder 7760 2.6 3.8 68 3.2 5.4 59
Powder River Pass 9480 1.5 3.8 39 4.0 5.0 80
Soldier Park 8720 2.1 -M * 4.4 -M *
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Basin Index (%) 66 83
TONGUE RIVER
Big Goose 7990 2.9 3.0 97 4.3 4.6 93
Bone Springs Div 9350 6.3 6.2 102 7.0 6.0 117
Burgess Junction 7880 3.3 3.9 85 4.7 5.1 92
Dome Lake 8880 2.9 4.5 64 5.8 5.9 98
Little Goose 8870 3.4 -M * 5.2 -M *
Sucker Creek 8880 4.0 4.1 98 4.6 5.8 79
Tie Creek 6870 2.6 1.2 217 5.3 4.8 110
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Basin Index (%) 96 98
BELLE FOURCHE
Cole Canyon 5910 2.0 1.0 200 3.1 4.1 76
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Basin Index (%) 200 76
CHEYENNE RIVER BASIN
Blind Park 6890 2.7 2.2 123 4.1 5.2 79
North Rapid Creek 6130 2.4 2.4 100 2.6 4.3 60
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Basin Index (%) 111 71
UPPER N. PLATTE
Arapaho Ridge 10960 9.2 7.6 121 11.0 9.2 120
Blackhall Mtn 9820 10.6 -M * 12.7 -M *
Columbine 9160 8.5 6.9 123 10.1 9.6 105
Divide Peak 8880 5.6 6.5 86 7.6 8.6 88
Joe Wright 10120 5.9 8.0 74 11.1 10.3 108
Laprele Creek 8375 3.1 3.0 103 3.5 5.1 69
Med Bow 10500 13.3 -M * -M -M *
North French Creek 10130 8.1 9.6 84 10.2 10.0 102
Never Summer 10280 7.7 6.9 112 8.0 -M *
Old Battle 10000 10.0 10.5 95 10.6 13.5 79
Rawah 9020 4.7 3.6 131 6.9 6.2 111
Sage Creek Basin 7850 3.9 4.2 93 5.4 5.9 92
Sand Lake 10050 9.0 9.4 96 8.9 9.5 94
South Brush Creek 8440 2.8 3.8 74 4.0 6.1 66
Tower 10500 12.7 16.4 77 15.1 15.5 97
Webber Springs 9250 7.5 8.0 94 10.9 10.4 105
Willow Creek Pass 9540 6.4 4.6 139 7.2 5.6 129
Zirkel 9340 10.2 7.6 134 13.7 11.2 122
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Basin Index (%) 99 100
SWEETWATER
Deer Park 9700 7.8 5.1 153 11.3 7.4 153
Larsen Creek 9000 5.3 3.8 139 9.7 -M *
South Pass 9040 7.5 5.4 139 8.1 7.1 114
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Basin Index (%) 144 134
LOWER N. PLATTE
Casper Mtn. 7900 3.3 4.8 69 4.2 6.5 65
Laprele Creek 8375 3.1 3.0 103 3.5 5.1 69
Reno Hill 8400 -M 5.0 * -M 6.2 *
Windy Peak 7900 3.0 2.5 120 3.8 4.4 86
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Basin Index (%) 91 72
LARAMIE RIVER
Brooklyn Lake 10240 6.7 6.7 100 6.9 7.7 90
Cinnabar Park 9574 6.1 7.4 82 8.8 9.4 94
Crow Creek 8330 2.2 3.7 59 3.7 4.5 82
Deadman Hill 10220 6.6 5.8 114 7.3 6.6 111
Rawah 9020 4.7 3.6 131 6.9 6.2 111
Roach 9700 -M 5.3 * -M 7.4 *
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Basin Index (%) 97 98
S. PLATTE
Black Mountain 8920 3.4 -M * 5.1 -M *
Crow Creek 8330 2.2 3.7 59 3.7 4.5 82
Deadman Hill 10220 6.6 5.8 114 7.3 6.6 111
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Basin Index (%) 93 99
LITTLE SNAKE RIVER
Battle Mountain 7440 3.3 2.8 118 -M 5.9 *
Divide Peak 8880 5.6 6.5 86 7.6 8.6 88
Elk River 8700 7.2 5.0 144 8.2 7.5 109
Little Snake River 8915 9.6 6.2 155 14.4 12.1 119
Old Battle 10000 10.0 10.5 95 10.6 13.5 79
Sage Creek Basin 7850 3.9 4.2 93 5.4 5.9 92
Sandstone RS 8150 4.6 3.7 124 4.5 7.2 62
Whiskey Park 8950 7.5 7.7 97 11.2 10.0 112
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Basin Index (%) 111 96
UPPER GREEN RIVER
Big Sandy Opening 9080 6.9 4.7 147 9.8 5.2 188
Blind Bull Sum 8650 11.7 7.5 156 13.5 7.7 175
East Rim Divide 7930 4.6 3.3 139 7.8 4.5 173
Elkhart Park G.S. 9400 4.1 4.4 93 9.6 5.3 181
Gros Ventre Summit 8750 5.1 4.7 109 9.1 5.2 175
Gunsight Pass 9820 5.4 4.3 126 9.7 5.2 187
Kendall R.S. 7740 6.4 3.7 173 10.8 5.3 204
Loomis Park 8240 7.5 4.9 153 12.7 6.6 192
New Fork Lake 8340 5.0 3.4 147 5.8 4.3 135
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 4.7 3.9 121 9.9 5.3 187
Spring Creek Divide 9000 10.3 8.0 129 15.6 8.9 175
Triple Peak 8500 12.1 6.8 178 16.9 9.1 186
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Basin Index (%) 141 181
LOWER GREEN RIVER
Blacks Fork Jct 8870 3.8 -M * 5.8 -M *
Buck Pasture 9700 5.4 -M * 8.4 -M *
EF Blacks Fork GS 9360 5.0 -M * 5.5 -M *
Hams Fork 7840 4.0 3.4 118 7.9 4.3 184
Hewinta 9519 3.8 2.9 131 6.1 5.7 107
Hickerson Park 9145 3.2 2.0 160 3.4 4.4 77
Hole-in-Rock 9150 2.1 2.3 91 3.9 4.2 93
Indian Creek 9425 9.8 8.1 121 13.5 8.0 169
Kelley R.S. 8180 6.8 4.6 148 12.3 6.9 178
Spirit Lk 10235 4.5 -M * 6.5 -M *
Steel Creek Park 10200 5.6 5.4 104 7.7 6.5 118
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Basin Index (%) 123 137
UPPER BEAR RIVER
Bear River RS 8777 4.0 -M * 5.9 -M *
Bug Lake 7950 9.0 5.3 170 10.3 7.5 137
Burts Miller Ranch 8000 2.3 -M * 3.1 -M *
Chalk Creek #1 8993 9.5 8.4 113 11.9 9.9 120
Hayden Fork 9212 7.0 4.3 163 10.7 8.1 132
Kelley R.S. 8180 6.8 4.6 148 12.3 6.9 178
Lily Lake 9156 4.4 4.4 100 6.9 7.0 99
Monte Cristo 8960 9.2 8.2 112 12.3 9.8 126
Salt River Summit 7760 4.2 3.5 120 9.9 6.1 162
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Basin Index (%) 129 134
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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.