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: NOVEMBER 18 , 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 5.6 1.9 295 7.1 4.2 169
Black Bear 8170 10.7 6.3 170 9.2 7.4 124
Blind Bull Sum 8650 9.3 3.3 282 6.0 3.9 154
Cottonwood Creek 7670 3.8 2.6 146 5.0 5.0 100
East Rim Divide 7930 2.6 1.3 200 3.3 2.5 132
Grand Targhee 9260 15.9 8.1 196 9.1 8.8 103
Granite Creek 6770 -M 1.4 * -M 3.8 *
Grassy Lake 7265 6.2 3.9 159 7.8 6.8 115
Gros Ventre Summit 8750 6.2 2.8 221 5.5 3.1 177
Gunsight Pass 9820 4.6 2.5 184 5.2 3.4 153
Lewis Lake Divide 7850 8.5 4.2 202 9.7 6.8 143
Phillips Bench 8200 6.7 3.4 197 7.5 5.1 147
Salt River Summit 7760 1.9 1.0 190* 3.2 3.2 100
Snake River Station 6920 4.0 1.4 286* 6.3 4.6 137
Spring Creek Divide 9000 5.6 3.3 170 6.0 4.7 128
Thumb Divide 7980 5.2 2.0 260 6.3 3.9 162
Togwotee Pass 9580 10.0 5.0 200 9.2 5.3 174
Two Ocean Plateau 9240 14.3 6.0 238 9.0 5.8 155
Willow Creek 8380 6.6 3.6 183 8.8 6.9 128
Younts Peak 8350 6.9 3.0 230 6.2 3.8 163
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Basin Index (%) 205 137
MADISON-GALLATIN
Black Bear 8170 10.7 6.3 170 9.2 7.4 124
Canyon 7870 3.3 1.8 183 4.3 3.5 123
Madison Plateau 7750 6.4 3.2 200 6.7 5.1 131
West Yellowstone 6700 2.5 1.1 227 4.1 3.1 132
Whiskey Creek 6800 -M 1.8 * 4.3 4.1 105
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Basin Index (%) 185 123
YELLOWSTONE
Beartooth Lake 9360 10.9 4.6 237 9.0 4.0 225
Burnt Mtn 5880 2.5 .1 2500* 4.9 4.3 114
Canyon 7870 3.3 1.8 183 4.3 3.5 123
Cole Creek 7850 4.5 3.5 129 3.2 4.2 76
Evening Star 9200 11.8 4.9 241 11.3 6.1 185
Fisher Creek 9100 14.2 5.9 241 11.5 6.6 174
Northeast Entrance 7350 2.5 .9 278* 4.5 3.1 145
Parker Peak 9400 10.7 4.5 238 8.0 4.3 186
Sylvan Lake 8420 8.0 3.6 222 7.7 5.3 145
Thumb Divide 7980 5.2 2.0 260 6.3 3.9 162
Two Ocean Plateau 9240 14.3 6.0 238 9.0 5.8 155
White Mill 8700 11.6 4.3 270 7.0 5.2 135
Wolverine 7650 3.8 1.0 380 5.3 3.1 171
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Basin Index (%) 240 155
WIND RIVER
Burroughs Creek 8750 4.5 -M * 4.6 -M *
Castle Creek 8400 1.9 -M * 3.2 -M *
Cold Springs 9630 2.4 1.8 133 3.0 2.9 103
Deer Park 9700 5.2 3.3 158 5.3 4.7 113
Hobbs Park 10100 7.0 3.5 200 5.5 3.6 153
Kirwin 9550 6.9 2.7 256 5.3 3.1 171
Little Warm 9370 6.1 2.2 277 5.5 3.2 172
Owl Creek 8975 1.0 1.3 77 2.5 1.9 132
South Pass 9040 3.9 2.8 139 3.2 4.1 78
St. Lawrence Alt 8620 1.4 1.5 93 3.5 2.6 135
Togwotee Pass 9580 10.0 5.0 200 9.2 5.3 174
Townsend Creek 8700 2.5 1.9 132 3.5 3.4 103
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Basin Index (%) 178 134
BIGHORN BASIN
Bald Mtn. 9380 5.5 4.4 125 3.3 4.2 79
Bear Trap Meadow 8200 1.8 1.0 180 3.2 2.6 123
Bone Springs Div 9350 3.8 4.1 93 3.3 4.0 82
Grave Springs 8550 1.5 1.4 107 1.7 3.1 55
Kirwin 9550 6.9 2.7 256 5.3 3.1 171
Marquette 8760 2.0 -M * 4.0 -M *
Middle Powder 7760 2.0 1.9 105 1.6 3.6 44
Owl Creek 8975 1.0 1.3 77 2.5 1.9 132
Powder River Pass 9480 4.9 2.2 223 4.1 3.3 124
Shell Creek 9580 6.9 3.9 177 4.1 3.7 111
Timber Creek 7950 1.3 1.3 100 1.2 2.8 43
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Basin Index (%) 147 94
SHOSHONE RIVER
Blackwater 9780 12.6 4.7 268 9.5 4.9 194
Evening Star 9200 11.8 4.9 241 11.3 6.1 185
Marquette 8760 2.0 -M * 4.0 -M *
Sylvan Road 7120 3.9 1.5 260 6.3 4.2 150
Younts Peak 8350 6.9 3.0 230 6.2 3.8 163
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Basin Index (%) 250 175
POWDER RIVER
Bear Trap Meadow 8200 1.8 1.0 180 3.2 2.6 123
Cloud Peak Reservoir 9860 3.1 3.1 100 4.1 4.0 102
Grave Springs 8550 1.5 1.4 107 1.7 3.1 55
Hansen Sawmill 8360 2.1 1.0 210 3.1 2.6 119
Middle Powder 7760 2.0 1.9 105 1.6 3.6 44
Powder River Pass 9480 4.9 2.2 223 4.1 3.3 124
Soldier Park 8720 1.3 -M * 3.2 -M *
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Basin Index (%) 145 93
TONGUE RIVER
Big Goose 7990 1.3 1.7 76 1.9 3.3 58
Bone Springs Div 9350 3.8 4.1 93 3.3 4.0 82
Burgess Junction 7880 1.5 2.4 62 1.9 3.5 54
Dome Lake 8880 2.6 2.9 90 2.7 4.0 68
Little Goose 8870 1.6 -M * 3.0 -M *
Sucker Creek 8880 1.8 2.6 69 -M 3.9 *
Tie Creek 6870 .9 .6 150 2.2 3.6 61
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Basin Index (%) 83 65
BELLE FOURCHE
Cole Canyon 5910 .7 .4 175* 1.9 3.0 63
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Basin Index (%) 175* 63
CHEYENNE RIVER BASIN
Blind Park 6890 1.0 1.2 83 2.9 3.7 78
North Rapid Creek 6130 1.0 .9 111 1.8 3.2 56
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Basin Index (%) 95 68
UPPER N. PLATTE
Arapaho Ridge 10960 4.8 4.5 107 5.3 5.7 93
Blackhall Mtn 9820 6.2 -M * 6.7 -M *
Columbine 9160 2.6 2.8 93 5.7 5.1 112
Divide Peak 8880 2.9 3.2 91 5.7 5.1 112
Joe Wright 10120 3.6 4.6 78 8.7 6.2 140
Laprele Creek 8375 1.2 1.8 67 2.4 3.3 73
Med Bow 10500 8.5 -M * 7.4 -M *
North French Creek 10130 6.0 4.8 125 6.7 5.8 116
Never Summer 10280 5.6 4.1 137 5.5 -M *
Old Battle 10000 5.9 5.7 104 5.6 7.4 76
Rawah 9020 2.4 1.7 141 5.3 4.1 129
Sage Creek Basin 7850 1.6 1.7 94 3.1 3.6 86
Sand Lake 10050 7.2 5.0 144 6.1 5.5 111
South Brush Creek 8440 2.8 1.6 175 4.0 3.8 105
Tower 10500 5.8 8.4 69 8.1 8.5 95
Webber Springs 9250 3.3 3.3 100 5.1 5.7 89
Willow Creek Pass 9540 4.6 2.6 177 4.7 3.5 134
Zirkel 9340 3.5 3.3 106 7.6 6.7 113
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Basin Index (%) 108 105
SWEETWATER
Deer Park 9700 5.2 3.3 158 5.3 4.7 113
Larsen Creek 9000 1.7 1.4 121 3.1 -M *
South Pass 9040 3.9 2.8 139 3.2 4.1 78
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Basin Index (%) 144 97
LOWER N. PLATTE
Casper Mtn. 7900 1.8 2.7 67 1.8 4.4 41
Laprele Creek 8375 1.2 1.8 67 2.4 3.3 73
Reno Hill 8400 2.3 2.5 92 3.3 4.0 82
Windy Peak 7900 1.2 1.4 86 2.2 2.9 76
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Basin Index (%) 77 66
LARAMIE RIVER
Brooklyn Lake 10240 3.5 3.1 113 5.0 4.3 116
Cinnabar Park 9574 4.8 3.5 137 6.6 5.2 127
Crow Creek 8330 .8 1.0 80 3.7 2.9 128
Deadman Hill 10220 6.4 3.5 183 6.7 4.2 160
Rawah 9020 2.4 1.7 141 5.3 4.1 129
Roach 9700 4.2 2.7 156 6.0 4.3 140
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Basin Index (%) 143 133
S. PLATTE
Black Mountain 8920 2.8 -M * 4.9 -M *
Crow Creek 8330 .8 1.0 80 3.7 2.9 128
Deadman Hill 10220 6.4 3.5 183 6.7 4.2 160
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Basin Index (%) 160 146
LITTLE SNAKE RIVER
Battle Mountain 7440 .6 .8 75* 2.3 3.5 66
Divide Peak 8880 2.9 3.2 91 5.7 5.1 112
Elk River 8700 2.4 1.6 150* 4.5 4.3 105
Little Snake River 8915 3.0 2.9 103 6.5 6.9 94
Old Battle 10000 5.9 5.7 104 5.6 7.4 76
Sage Creek Basin 7850 1.6 1.7 94 3.1 3.6 86
Sandstone RS 8150 1.6 1.1 145* 2.5 4.1 61
Whiskey Park 8950 2.9 3.4 85 5.7 5.5 104
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Basin Index (%) 102 89
UPPER GREEN RIVER
Big Sandy Opening 9080 2.8 2.9 97 3.4 3.1 110
Blind Bull Sum 8650 9.3 3.3 282 6.0 3.9 154
East Rim Divide 7930 2.6 1.3 200 3.3 2.5 132
Elkhart Park G.S. 9400 2.5 2.4 104 2.8 3.2 88
Gros Ventre Summit 8750 6.2 2.8 221 5.5 3.1 177
Gunsight Pass 9820 4.6 2.5 184 5.2 3.4 153
Kendall R.S. 7740 3.4 1.6 212 4.2 3.0 140
Loomis Park 8240 4.1 2.1 195 4.5 3.5 129
New Fork Lake 8340 2.2 1.6 138 1.6 2.6 62
Pocket Creek 9360 3.3 -M * 3.0 -M *
Snider Basin 8060 2.2 1.6 138 3.3 2.9 114
Spring Creek Divide 9000 5.6 3.3 170 6.0 4.7 128
Triple Peak 8500 6.2 3.2 194 7.8 4.8 162
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Basin Index (%) 181 132
LOWER GREEN RIVER
Blacks Fork Jct 8869 1.6 -M * 2.3 -M *
Buck Pasture 9632 2.6 -M * 3.0 -M *
EF Blacks Fork GS 9360 1.8 -M * 2.5 -M *
Hams Fork 7840 1.2 1.2 100 2.3 2.6 88
Hewinta 9500 1.2 1.3 92 2.7 3.5 77
Hickerson Park 9122 1.9 1.3 146 1.6 3.1 52
Hole-in-Rock 9168 1.4 1.1 127 1.8 3.0 60
Indian Creek 9425 4.9 4.2 117 4.0 4.4 91
Kelley R.S. 8180 2.7 2.0 135 3.2 3.6 89
Spirit Lk 10235 1.9 -M * 2.2 -M *
Steel Creek Park 10158 3.7 3.0 123 3.6 4.1 88
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Basin Index (%) 121 79
UPPER BEAR RIVER
Bear River RS 8777 1.6 -M * 2.6 -M *
Bug Lake 7987 3.2 2.2 145 4.5 4.0 112
Burts Miller Ranch 8000 1.4 -M * 1.6 -M *
Chalk Creek #1 9171 3.6 3.5 103 4.2 5.6 75
Hayden Fork 9130 2.4 1.9 126 3.4 4.6 74
Kelley R.S. 8180 2.7 2.0 135 3.2 3.6 89
Lily Lake 9133 1.8 1.9 95 2.7 4.2 64
Monte Cristo 8932 5.2 2.8 186 4.9 5.2 94
Salt River Summit 7760 1.9 1.0 190* 3.2 3.2 100
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Basin Index (%) 136 86
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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.