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 WEDNESDAY: DECEMBER 13 , 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 6.0 5.2 115 8.4 7.7 109
Black Bear 8170 13.6 12.6 108 13.1 13.6 96
Blind Bull Sum 8650 11.2 6.7 167 7.3 7.2 101
Cottonwood Creek 7670 5.4 6.1 89 7.0 8.5 82
East Rim Divide 7930 3.0 2.7 111 4.1 4.2 98
Grand Targhee 9260 20.8 11.9 175 12.7 11.2 113
Granite Creek 6770 -M 4.0 * -M 7.0 *
Grassy Lake 7265 7.8 8.8 89 11.6 12.6 92
Gros Ventre Summit 8750 7.0 4.6 152 6.4 4.9 131
Gunsight Pass 9820 6.1 4.1 149 6.7 4.9 137
Lewis Lake Divide 7850 10.0 9.3 108 13.4 12.7 106
Phillips Bench 8200 7.7 7.6 101 9.4 9.6 98
Salt River Summit 7760 2.3 3.1 74 4.1 5.6 73
Snake River Station 6920 4.9 4.4 111 8.8 8.4 105
Spring Creek Divide 9000 7.6 6.9 110 8.1 8.3 98
Thumb Divide 7980 -M 4.1 * -M 6.8 *
Togwotee Pass 9580 13.2 8.6 153 13.0 9.0 144
Two Ocean Plateau 9240 17.0 10.2 167 11.6 10.0 116
Willow Creek 8380 9.0 7.7 117 12.5 11.9 105
Younts Peak 8350 -M 5.2 * -M 6.1 *
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Basin Index (%) 127 105
MADISON-GALLATIN
Black Bear 8170 13.6 12.6 108 13.1 13.6 96
Canyon 7870 3.9 3.6 108 6.2 5.9 105
Madison Plateau 7750 7.7 7.2 107 9.1 9.3 98
West Yellowstone 6700 3.0 2.8 107 6.0 5.1 118
Whiskey Creek 6800 3.7 4.3 86 5.6 7.5 75
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Basin Index (%) 105 97
YELLOWSTONE
Beartooth Lake 9360 13.1 7.4 177 11.4 6.9 165
Burnt Mtn 5880 1.0 1.5 67 6.3 5.8 109
Canyon 7870 3.9 3.6 108 6.2 5.9 105
Cole Creek 7850 5.8 5.4 107 4.5 5.6 80
Evening Star 9200 14.8 8.5 174 15.2 10.3 148
Fisher Creek 9100 18.0 10.8 167 15.3 11.5 133
Northeast Entrance 7350 -M 2.5 * -M 4.9 *
Parker Peak 9400 12.9 7.4 174 10.7 6.8 157
Sylvan Lake 8420 9.4 6.6 142 10.1 8.8 115
Thumb Divide 7980 -M 4.1 * -M 6.8 *
Two Ocean Plateau 9240 17.0 10.2 167 11.6 10.0 116
White Mill 8700 13.7 7.3 188 9.8 8.8 111
Wolverine 7650 3.3 3.1 106 7.2 4.9 147
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Basin Index (%) 157 127
WIND RIVER
Burroughs Creek 8750 5.4 -M * 6.8 -M *
Castle Creek 8400 2.7 -M * 4.3 -M *
Cold Springs 9630 3.5 2.6 135 4.3 4.2 102
Deer Park 9700 5.8 4.8 121 6.7 6.8 99
Hobbs Park 10100 8.7 5.6 155 7.3 5.2 140
Kirwin 9550 8.8 3.9 226 7.3 4.7 155
Little Warm 9370 7.5 3.6 208 7.4 5.1 145
Owl Creek 8975 1.7 2.1 81 3.4 2.5 136
South Pass 9040 5.0 5.0 100 4.1 6.7 61
St. Lawrence Alt 8620 2.5 2.6 96 4.7 3.7 127
Togwotee Pass 9580 13.2 8.6 153 13.0 9.0 144
Townsend Creek 8700 3.4 3.1 110 4.8 5.0 96
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Basin Index (%) 143 119
BIGHORN BASIN
Bald Mtn. 9380 7.4 6.5 114 4.8 6.1 79
Bear Trap Meadow 8200 3.3 1.9 174 4.3 3.6 119
Bone Springs Div 9350 5.7 5.9 97 4.5 5.7 79
Grave Springs 8550 2.3 2.4 96 2.3 4.1 56
Kirwin 9550 8.8 3.9 226 7.3 4.7 155
Marquette 8760 3.1 -M * 5.5 -M *
Middle Powder 7760 -M 3.4 * -M 5.0 *
Owl Creek 8975 1.7 2.1 81 3.4 2.5 136
Powder River Pass 9480 -M 3.6 * -M 4.8 *
Shell Creek 9580 8.2 5.5 149 5.2 5.3 98
Timber Creek 7950 1.4 2.0 70 1.2 3.5 34
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Basin Index (%) 128 93
SHOSHONE RIVER
Blackwater 9780 14.9 8.0 186 12.3 8.0 154
Evening Star 9200 14.8 8.5 174 15.2 10.3 148
Marquette 8760 3.1 -M * 5.5 -M *
Sylvan Road 7120 4.0 3.8 105 8.2 7.2 114
Younts Peak 8350 -M 5.2 * -M 6.1 *
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Basin Index (%) 166 140
POWDER RIVER
Bear Trap Meadow 8200 3.3 1.9 174 4.3 3.6 119
Cloud Peak Reservoir 9860 4.9 4.6 107 5.7 5.2 110
Grave Springs 8550 2.3 2.4 96 2.3 4.1 56
Hansen Sawmill 8360 -M 2.0 * -M 3.4 *
Middle Powder 7760 -M 3.4 * -M 5.0 *
Powder River Pass 9480 -M 3.6 * -M 4.8 *
Soldier Park 8720 1.5 -M * 3.8 -M *
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Basin Index (%) 118* 95*
TONGUE RIVER
Big Goose 7990 -M 3.0 * -M 4.5 *
Bone Springs Div 9350 5.7 5.9 97 4.5 5.7 79
Burgess Junction 7880 2.6 3.6 72 3.0 4.8 62
Dome Lake 8880 3.3 4.2 79 3.8 5.5 69
Little Goose 8870 2.7 -M * 4.6 -M *
Sucker Creek 8880 3.3 3.9 85 -M 5.4 *
Tie Creek 6870 .7 1.1 64 3.4 4.6 74
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Basin Index (%) 83 71
BELLE FOURCHE
Cole Canyon 5910 1.3 1.1 118 3.3 3.9 85
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Basin Index (%) 118 85
CHEYENNE RIVER BASIN
Blind Park 6890 2.4 2.0 120 4.2 4.8 88
North Rapid Creek 6130 -M 2.2 * -M 4.1 *
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Basin Index (%) 120 88
UPPER N. PLATTE
Arapaho Ridge 10960 6.0 7.0 86 6.4 8.6 74
Blackhall Mtn 9820 7.9 -M * 8.5 -M *
Columbine 9160 3.2 6.0 53 8.0 8.7 92
Divide Peak 8880 -M 5.8 * -M 8.0 *
Joe Wright 10120 5.4 7.4 73 10.6 9.6 110
Laprele Creek 8375 1.8 2.8 64 3.3 4.8 69
Med Bow 10500 11.5 -M * 10.2 -M *
North French Creek 10130 8.2 8.7 94 9.1 9.2 99
Never Summer 10280 6.4 6.3 102 6.1 -M *
Old Battle 10000 -M 9.4 * -M 12.4 *
Rawah 9020 3.5 3.3 106 6.7 5.8 116
Sage Creek Basin 7850 2.3 3.7 62 3.9 5.5 71
Sand Lake 10050 9.1 8.8 103 8.1 8.8 92
South Brush Creek 8440 3.5 3.4 103 5.0 5.6 89
Tower 10500 8.9 14.4 62 10.9 14.3 76
Webber Springs 9250 4.8 7.0 69 7.0 9.4 74
Willow Creek Pass 9540 5.2 4.1 127 5.5 5.3 104
Zirkel 9340 4.9 6.6 74 9.6 10.4 92
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Basin Index (%) 82 89
SWEETWATER
Deer Park 9700 5.8 4.8 121 6.7 6.8 99
Larsen Creek 9000 2.4 3.4 71 4.2 -M *
South Pass 9040 5.0 5.0 100 4.1 6.7 61
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Basin Index (%) 100 80
LOWER N. PLATTE
Casper Mtn. 7900 2.9 4.2 69 3.0 6.2 48
Laprele Creek 8375 1.8 2.8 64 3.3 4.8 69
Reno Hill 8400 3.9 4.7 83 5.0 5.8 86
Windy Peak 7900 1.4 2.2 64 3.2 4.2 76
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Basin Index (%) 72 69
LARAMIE RIVER
Brooklyn Lake 10240 5.4 5.9 92 7.1 7.1 100
Cinnabar Park 9574 6.7 6.9 97 8.8 8.6 102
Crow Creek 8330 .0 3.5 0 4.5 4.3 105
Deadman Hill 10220 7.7 5.3 145 8.0 6.2 129
Rawah 9020 3.5 3.3 106 6.7 5.8 116
Roach 9700 4.8 4.8 100 7.1 6.9 103
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Basin Index (%) 95 108
S. PLATTE
Black Mountain 8920 3.7 -M * 5.9 -M *
Crow Creek 8330 .0 3.5 0 4.5 4.3 105
Deadman Hill 10220 7.7 5.3 145 8.0 6.2 129
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Basin Index (%) 88 119
LITTLE SNAKE RIVER
Battle Mountain 7440 .9 2.4 38 -M 5.5 *
Divide Peak 8880 -M 5.8 * -M 8.0 *
Elk River 8700 3.5 4.4 80 6.0 6.9 87
Little Snake River 8915 4.1 5.1 80 8.6 11.1 77
Old Battle 10000 -M 9.4 * -M 12.4 *
Sage Creek Basin 7850 2.3 3.7 62 3.9 5.5 71
Sandstone RS 8150 1.8 3.2 56 3.1 6.5 48
Whiskey Park 8950 4.8 7.0 69 7.7 9.1 85
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Basin Index (%) 67 75
UPPER GREEN RIVER
Big Sandy Opening 9080 4.2 4.4 95 4.7 4.9 96
Blind Bull Sum 8650 11.2 6.7 167 7.3 7.2 101
East Rim Divide 7930 3.0 2.7 111 4.1 4.2 98
Elkhart Park G.S. 9400 3.7 4.0 92 4.2 5.0 84
Gros Ventre Summit 8750 7.0 4.6 152 6.4 4.9 131
Gunsight Pass 9820 6.1 4.1 149 6.7 4.9 137
Kendall R.S. 7740 4.2 3.3 127 5.2 4.9 106
Loomis Park 8240 5.1 4.2 121 5.9 6.1 97
New Fork Lake 8340 3.3 3.1 106 3.0 4.0 75
Pocket Creek 9360 4.6 -M * 3.7 -M *
Snider Basin 8060 2.5 3.5 71 5.2 4.9 106
Spring Creek Divide 9000 7.6 6.9 110 8.1 8.3 98
Triple Peak 8500 8.1 6.0 135 10.4 8.5 122
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Basin Index (%) 123 105
LOWER GREEN RIVER
Blacks Fork Jct 8869 2.0 -M * 3.1 -M *
Buck Pasture 9632 3.3 -M * 4.4 -M *
EF Blacks Fork GS 9360 2.2 -M * 3.0 -M *
Hams Fork 7840 1.7 3.1 55 3.2 4.1 78
Hewinta 9500 1.4 2.5 56 3.6 5.4 67
Hickerson Park 9122 2.2 1.9 116 1.7 4.2 40
Hole-in-Rock 9168 1.6 2.1 76 2.2 4.0 55
Indian Creek 9425 6.6 7.2 92 5.4 7.5 72
Kelley R.S. 8180 3.4 4.1 83 4.5 6.4 70
Spirit Lk 10235 2.4 -M * 2.8 -M *
Steel Creek Park 10158 4.5 5.1 88 4.4 6.1 72
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Basin Index (%) 82 66
UPPER BEAR RIVER
Bear River RS 8777 2.0 -M * 3.4 -M *
Bug Lake 7987 4.3 4.7 91 6.1 7.0 87
Burts Miller Ranch 8000 .7 -M * 2.2 -M *
Chalk Creek #1 9171 4.4 7.6 58 5.4 9.2 59
Hayden Fork 9130 3.1 3.8 82 4.6 7.5 61
Kelley R.S. 8180 3.4 4.1 83 4.5 6.4 70
Lily Lake 9133 2.4 3.9 62 3.6 6.5 55
Monte Cristo 8932 -M 7.3 * -M 9.0 *
Salt River Summit 7760 2.3 3.1 74 4.1 5.6 73
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Basin Index (%) 73 67
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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.