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 SATURDAY: DECEMBER 2 , 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 6.3 4.1 154 8.2 6.2 132
Black Bear 8170 12.6 9.2 137 12.2 10.9 112
Blind Bull Sum 8650 11.1 5.3 209 7.1 5.9 120
Cottonwood Creek 7670 4.7 4.5 104 6.5 7.1 92
East Rim Divide 7930 3.1 2.0 155 4.0 3.5 114
Grand Targhee 9260 19.8 9.9 200 12.0 9.9 121
Granite Creek 6770 4.6 2.7 170 7.8 5.6 139
Grassy Lake 7265 7.6 6.6 115 11.0 10.2 108
Gros Ventre Summit 8750 6.6 3.8 174 6.2 4.2 148
Gunsight Pass 9820 5.6 3.3 170 6.2 4.2 148
Lewis Lake Divide 7850 10.0 7.5 133 12.6 10.2 124
Phillips Bench 8200 7.0 5.8 121 9.0 7.6 118
Salt River Summit 7760 1.6 2.1 76 3.7 4.5 82
Snake River Station 6920 4.0 3.4 118 8.2 6.8 121
Spring Creek Divide 9000 7.0 5.3 132 7.5 6.7 112
Thumb Divide 7980 6.5 3.3 197 7.7 5.5 140
Togwotee Pass 9580 12.3 7.4 166 11.9 7.4 161
Two Ocean Plateau 9240 16.3 8.7 187 11.1 8.3 134
Willow Creek 8380 8.2 5.9 139 11.4 9.9 115
Younts Peak 8350 -M 4.4 * -M 5.1 *
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Basin Index (%) 154 122
MADISON-GALLATIN
Black Bear 8170 12.6 9.2 137 12.2 10.9 112
Canyon 7870 4.3 3.1 139 5.6 4.9 114
Madison Plateau 7750 7.5 5.3 142 8.5 7.5 113
West Yellowstone 6700 2.6 2.0 130 5.5 4.3 128
Whiskey Creek 6800 3.8 3.3 115 5.0 6.0 83
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Basin Index (%) 134 110
YELLOWSTONE
Beartooth Lake 9360 12.5 6.2 202 10.7 5.7 188
Burnt Mtn 5880 .2 1.3 15 5.3 5.2 102
Canyon 7870 4.3 3.1 139 5.6 4.9 114
Cole Creek 7850 4.5 4.2 107 3.6 5.0 72
Evening Star 9200 13.6 7.3 186 14.2 8.6 165
Fisher Creek 9100 16.4 8.9 184 13.8 9.4 147
Northeast Entrance 7350 2.1 1.7 124 5.7 4.2 136
Parker Peak 9400 12.4 6.3 197 10.1 5.8 174
Sylvan Lake 8420 9.0 5.3 170 9.6 7.4 130
Thumb Divide 7980 6.5 3.3 197 7.7 5.5 140
Two Ocean Plateau 9240 16.3 8.7 187 11.1 8.3 134
White Mill 8700 13.4 6.2 216 8.8 7.3 121
Wolverine 7650 3.2 2.1 152 6.7 4.2 160
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Basin Index (%) 177 139
WIND RIVER
Burroughs Creek 8750 5.2 -M * 6.2 -M *
Castle Creek 8400 2.5 -M * 4.0 -M *
Cold Springs 9630 3.1 2.5 124 3.6 3.7 97
Deer Park 9700 5.2 4.2 124 5.9 5.7 104
Hobbs Park 10100 7.8 4.6 170 6.3 4.5 140
Kirwin 9550 7.8 3.5 223 6.4 4.0 160
Little Warm 9370 7.2 2.9 248 6.8 4.3 158
Owl Creek 8975 1.3 1.6 81 3.0 2.2 136
South Pass 9040 4.3 4.0 108 3.6 5.4 67
St. Lawrence Alt 8620 1.7 2.1 81 3.9 3.3 118
Togwotee Pass 9580 12.3 7.4 166 11.9 7.4 161
Townsend Creek 8700 2.7 2.5 108 4.1 4.4 93
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Basin Index (%) 151 124
BIGHORN BASIN
Bald Mtn. 9380 6.5 5.9 110 4.1 5.3 77
Bear Trap Meadow 8200 2.5 1.5 167 3.8 3.2 119
Bone Springs Div 9350 4.7 5.1 92 3.9 5.0 78
Grave Springs 8550 1.6 1.9 84 1.8 3.8 47
Kirwin 9550 7.8 3.5 223 6.4 4.0 160
Marquette 8760 2.0 -M * 4.5 -M *
Middle Powder 7760 2.0 3.1 65 1.9 4.5 42
Owl Creek 8975 1.3 1.6 81 3.0 2.2 136
Powder River Pass 9480 5.6 3.0 187 4.7 4.2 112
Shell Creek 9580 7.7 5.1 151 4.8 4.7 102
Timber Creek 7950 .8 1.7 47 1.0 3.3 30
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Basin Index (%) 125 88
SHOSHONE RIVER
Blackwater 9780 14.0 7.2 194 11.4 6.7 170
Evening Star 9200 13.6 7.3 186 14.2 8.6 165
Marquette 8760 2.0 -M * 4.5 -M *
Sylvan Road 7120 4.1 2.9 141 7.7 6.1 126
Younts Peak 8350 -M 4.4 * -M 5.1 *
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Basin Index (%) 182 156
POWDER RIVER
Bear Trap Meadow 8200 2.5 1.5 167 3.8 3.2 119
Cloud Peak Reservoir 9860 3.9 3.9 100 4.9 4.8 102
Grave Springs 8550 1.6 1.9 84 1.8 3.8 47
Hansen Sawmill 8360 2.4 1.7 141 3.5 3.1 113
Middle Powder 7760 2.0 3.1 65 1.9 4.5 42
Powder River Pass 9480 5.6 3.0 187 4.7 4.2 112
Soldier Park 8720 1.1 -M * 3.5 -M *
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Basin Index (%) 119 87
TONGUE RIVER
Big Goose 7990 1.5 2.5 60 2.3 4.1 56
Bone Springs Div 9350 4.7 5.1 92 3.9 5.0 78
Burgess Junction 7880 1.9 3.2 59 2.3 4.2 55
Dome Lake 8880 2.8 3.8 74 3.1 5.0 62
Little Goose 8870 1.8 -M * 3.7 -M *
Sucker Creek 8880 2.2 3.3 67 -M 4.8 *
Tie Creek 6870 .1 .8 12 2.8 4.2 67
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Basin Index (%) 71 64
BELLE FOURCHE
Cole Canyon 5910 .2 .8 25 2.1 3.6 58
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Basin Index (%) 25 58
CHEYENNE RIVER BASIN
Blind Park 6890 1.4 1.8 78 3.2 4.4 73
North Rapid Creek 6130 1.6 1.5 107 2.1 3.7 57
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Basin Index (%) 91 65
UPPER N. PLATTE
Arapaho Ridge 10960 5.4 5.8 93 5.8 7.0 83
Blackhall Mtn 9820 6.5 -M * 7.1 -M *
Columbine 9160 2.6 4.7 55 6.9 7.2 96
Divide Peak 8880 2.7 4.7 57 5.9 6.9 86
Joe Wright 10120 4.1 6.1 67 9.5 8.3 114
Laprele Creek 8375 1.3 2.3 57 2.7 4.1 66
Med Bow 10500 9.2 -M * 8.3 -M *
North French Creek 10130 6.6 7.2 92 7.4 7.9 94
Never Summer 10280 5.8 5.1 114 5.8 -M *
Old Battle 10000 6.0 8.0 75 6.0 10.2 59
Rawah 9020 2.6 2.6 100 5.9 5.0 118
Sage Creek Basin 7850 1.5 2.3 65 3.2 4.7 68
Sand Lake 10050 7.6 7.4 103 6.7 7.5 89
South Brush Creek 8440 2.6 2.9 90 4.3 5.0 86
Tower 10500 7.1 11.7 61 9.4 11.8 80
Webber Springs 9250 3.5 5.1 69 5.8 7.8 74
Willow Creek Pass 9540 4.7 3.7 127 5.1 4.6 111
Zirkel 9340 4.0 4.8 83 8.6 8.5 101
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Basin Index (%) 81 88
SWEETWATER
Deer Park 9700 5.2 4.2 124 5.9 5.7 104
Larsen Creek 9000 1.8 2.6 69 3.9 -M *
South Pass 9040 4.3 4.0 108 3.6 5.4 67
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Basin Index (%) 105 86
LOWER N. PLATTE
Casper Mtn. 7900 1.6 3.6 44 2.0 5.5 36
Laprele Creek 8375 1.3 2.3 57 2.7 4.1 66
Reno Hill 8400 2.7 3.7 73 3.7 5.0 74
Windy Peak 7900 .8 1.8 44 2.6 3.6 72
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Basin Index (%) 56 60
LARAMIE RIVER
Brooklyn Lake 10240 4.3 4.3 100 5.8 5.9 98
Cinnabar Park 9574 5.9 5.5 107 7.7 6.9 112
Crow Creek 8330 .0 2.0 0 4.1 3.7 111
Deadman Hill 10220 6.7 4.9 137 7.0 5.4 130
Rawah 9020 2.6 2.6 100 5.9 5.0 118
Roach 9700 4.4 4.1 107 6.5 5.8 112
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Basin Index (%) 102 113
S. PLATTE
Black Mountain 8920 3.0 -M * 5.2 -M *
Crow Creek 8330 .0 2.0 0 4.1 3.7 111
Deadman Hill 10220 6.7 4.9 137 7.0 5.4 130
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Basin Index (%) 97 122
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 1.6 0 3.0 4.7 64
Divide Peak 8880 2.7 4.7 57 5.9 6.9 86
Elk River 8700 2.7 3.1 87 5.1 5.8 88
Little Snake River 8915 2.8 3.9 72 7.0 9.1 77
Old Battle 10000 6.0 8.0 75 6.0 10.2 59
Sage Creek Basin 7850 1.5 2.3 65 3.2 4.7 68
Sandstone RS 8150 1.0 2.2 45 2.7 5.5 49
Whiskey Park 8950 3.4 4.9 69 6.2 7.6 82
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Basin Index (%) 65 72
UPPER GREEN RIVER
Big Sandy Opening 9080 3.7 3.7 100 4.2 4.1 102
Blind Bull Sum 8650 11.1 5.3 209 7.1 5.9 120
East Rim Divide 7930 3.1 2.0 155 4.0 3.5 114
Elkhart Park G.S. 9400 3.4 3.4 100 3.7 4.2 88
Gros Ventre Summit 8750 6.6 3.8 174 6.2 4.2 148
Gunsight Pass 9820 5.6 3.3 170 6.2 4.2 148
Kendall R.S. 7740 4.0 2.6 154 5.2 4.1 127
Loomis Park 8240 4.9 3.2 153 5.7 4.9 116
New Fork Lake 8340 3.0 2.4 125 2.7 3.4 79
Pocket Creek 9360 4.1 -M * 3.7 -M *
Snider Basin 8060 2.3 2.9 79 4.5 4.0 112
Spring Creek Divide 9000 7.0 5.3 132 7.5 6.7 112
Triple Peak 8500 7.3 5.1 143 9.8 6.9 142
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Basin Index (%) 144 119
LOWER GREEN RIVER
Blacks Fork Jct 8869 1.8 -M * 2.7 -M *
Buck Pasture 9632 3.0 -M * 3.6 -M *
EF Blacks Fork GS 9360 2.0 -M * 3.2 -M *
Hams Fork 7840 1.3 2.3 57 3.0 3.4 88
Hewinta 9500 1.3 2.0 65 3.1 4.6 67
Hickerson Park 9122 1.9 1.6 119 1.7 3.8 45
Hole-in-Rock 9168 1.4 1.7 82 2.1 3.6 58
Indian Creek 9425 5.9 5.9 100 4.9 6.1 80
Kelley R.S. 8180 2.9 3.1 94 3.9 5.2 75
Spirit Lk 10235 2.2 -M * 2.4 -M *
Steel Creek Park 10158 3.9 4.0 98 3.9 5.3 74
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Basin Index (%) 90 71
UPPER BEAR RIVER
Bear River RS 8777 1.6 -M * 3.0 -M *
Bug Lake 7987 3.3 3.6 92 5.4 5.6 96
Burts Miller Ranch 8000 .2 -M * 1.8 -M *
Chalk Creek #1 9171 3.7 5.4 69 4.7 7.7 61
Hayden Fork 9130 2.4 3.1 77 4.0 6.4 62
Kelley R.S. 8180 2.9 3.1 94 3.9 5.2 75
Lily Lake 9133 1.5 2.9 52 3.1 5.6 55
Monte Cristo 8932 5.3 5.8 91 5.6 7.4 76
Salt River Summit 7760 1.6 2.1 76 3.7 4.5 82
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Basin Index (%) 80 72
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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.