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: NOVEMBER 15 , 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 4.4 1.7 259 5.5 3.9 141
Black Bear 8170 8.0 5.7 140 6.8 6.9 99
Blind Bull Sum 8650 6.6 3.0 220 4.1 3.6 114
Cottonwood Creek 7670 2.7 2.3 117 3.8 4.7 81
East Rim Divide 7930 1.6 1.1 145 2.5 2.4 104
Grand Targhee 9260 13.6 7.3 186 7.8 8.1 96
Granite Creek 6770 -M 1.2 * -M 3.5 *
Grassy Lake 7265 4.1 3.5 117 5.6 6.4 88
Gros Ventre Summit 8750 4.6 2.6 177 4.1 3.0 137
Gunsight Pass 9820 2.8 2.4 117 3.9 3.3 118
Lewis Lake Divide 7850 5.4 3.6 150 6.9 6.2 111
Phillips Bench 8200 4.5 3.0 150 5.4 4.7 115
Salt River Summit 7760 1.0 .9 111* 2.2 2.9 76
Snake River Station 6920 2.5 1.2 208* 4.8 4.3 112
Spring Creek Divide 9000 3.9 3.0 130 4.3 4.3 100
Thumb Divide 7980 3.3 1.8 183 4.7 3.7 127
Togwotee Pass 9580 7.7 4.5 171 7.0 5.0 140
Two Ocean Plateau 9240 11.7 5.4 217 7.0 5.5 127
Willow Creek 8380 4.6 3.2 144 6.8 6.4 106
Younts Peak 8350 5.1 2.8 182 4.7 3.6 131
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Basin Index (%) 166 110
MADISON-GALLATIN
Black Bear 8170 8.0 5.7 140 6.8 6.9 99
Canyon 7870 2.6 1.6 162 3.6 3.4 106
Madison Plateau 7750 4.9 2.8 175 5.3 4.8 110
West Yellowstone 6700 1.9 .9 211* 3.0 3.0 100
Whiskey Creek 6800 -M 1.6 * 3.2 3.9 82
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Basin Index (%) 158 100
YELLOWSTONE
Beartooth Lake 9360 9.8 4.4 223 8.0 3.8 211
Burnt Mtn 5880 2.4 .0 * 4.6 4.2 110
Canyon 7870 2.6 1.6 162 3.6 3.4 106
Cole Creek 7850 4.5 3.4 132 3.0 4.1 73
Evening Star 9200 10.3 4.4 234 9.8 5.7 172
Fisher Creek 9100 12.4 5.3 234 10.0 6.3 159
Northeast Entrance 7350 2.4 .7 343* 4.1 2.9 141
Parker Peak 9400 9.5 4.2 226 6.9 4.1 168
Sylvan Lake 8420 6.8 3.2 212 6.4 5.0 128
Thumb Divide 7980 3.3 1.8 183 4.7 3.7 127
Two Ocean Plateau 9240 11.7 5.4 217 7.0 5.5 127
White Mill 8700 10.6 3.9 272 6.1 4.9 124
Wolverine 7650 3.3 .8 412* 4.8 2.9 166
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Basin Index (%) 229 140
WIND RIVER
Burroughs Creek 8750 3.2 -M * 3.3 -M *
Castle Creek 8400 1.7 -M * 3.0 -M *
Cold Springs 9630 1.9 1.7 112 2.5 2.8 89
Deer Park 9700 2.3 3.1 74 2.6 4.5 58
Hobbs Park 10100 5.2 3.2 162 4.2 3.4 124
Kirwin 9550 5.8 2.5 232 4.1 3.0 137
Little Warm 9370 5.3 2.0 265 4.4 3.1 142
Owl Creek 8975 .9 1.3 69 2.5 1.8 139
South Pass 9040 1.6 2.5 64 1.3 3.9 33
St. Lawrence Alt 8620 .9 1.3 69 3.0 2.5 120
Togwotee Pass 9580 7.7 4.5 171 7.0 5.0 140
Townsend Creek 8700 1.5 1.7 88 2.4 3.2 75
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Basin Index (%) 139 102
BIGHORN BASIN
Bald Mtn. 9380 4.9 4.2 117 2.9 4.1 71
Bear Trap Meadow 8200 1.5 .9 167 2.8 2.5 112
Bone Springs Div 9350 3.1 3.9 79 2.8 3.9 72
Grave Springs 8550 1.2 1.4 86 1.7 3.0 57
Kirwin 9550 5.8 2.5 232 4.1 3.0 137
Marquette 8760 1.7 -M * 3.7 -M *
Middle Powder 7760 1.6 1.7 94 1.6 3.5 46
Owl Creek 8975 .9 1.3 69 2.5 1.8 139
Powder River Pass 9480 4.3 2.1 205 3.8 3.1 123
Shell Creek 9580 6.3 3.8 166 3.6 3.5 103
Timber Creek 7950 1.1 1.1 100 1.1 2.8 39
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Basin Index (%) 134 86
SHOSHONE RIVER
Blackwater 9780 10.9 4.4 248 8.0 4.6 174
Evening Star 9200 10.3 4.4 234 9.8 5.7 172
Marquette 8760 1.7 -M * 3.7 -M *
Sylvan Road 7120 3.1 1.3 238 5.0 3.9 128
Younts Peak 8350 5.1 2.8 182 4.7 3.6 131
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Basin Index (%) 228 154
POWDER RIVER
Bear Trap Meadow 8200 1.5 .9 167 2.8 2.5 112
Cloud Peak Reservoir 9860 2.2 2.9 76 3.3 3.8 87
Grave Springs 8550 1.2 1.4 86 1.7 3.0 57
Hansen Sawmill 8360 1.4 .9 156 2.4 2.5 96
Middle Powder 7760 1.6 1.7 94 1.6 3.5 46
Powder River Pass 9480 4.3 2.1 205 3.8 3.1 123
Soldier Park 8720 1.0 -M * 2.7 -M *
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Basin Index (%) 123 85
TONGUE RIVER
Big Goose 7990 1.0 1.5 67 1.7 3.2 53
Bone Springs Div 9350 3.1 3.9 79 2.8 3.9 72
Burgess Junction 7880 1.2 2.2 55 1.8 3.4 53
Dome Lake 8880 2.3 2.7 85 2.7 3.9 69
Little Goose 8870 1.3 -M * 2.8 -M *
Sucker Creek 8880 1.2 2.4 50 -M 3.8 *
Tie Creek 6870 .6 .5 120* 1.8 3.5 51
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Basin Index (%) 71 60
BELLE FOURCHE
Cole Canyon 5910 .8 .3 267* 1.9 2.9 66
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Basin Index (%) 267* 66
CHEYENNE RIVER BASIN
Blind Park 6890 .9 1.1 82 2.6 3.6 72
North Rapid Creek 6130 .9 .9 100 1.6 3.1 52
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Basin Index (%) 90 63
UPPER N. PLATTE
Arapaho Ridge 10960 4.1 4.0 102 4.7 5.5 85
Blackhall Mtn 9820 5.0 -M * 5.4 -M *
Columbine 9160 1.7 2.4 71 4.5 4.8 94
Divide Peak 8880 1.3 2.9 45 4.4 4.9 90
Joe Wright 10120 2.4 4.3 56 7.4 5.9 125
Laprele Creek 8375 .4 1.5 27 1.8 3.1 58
Med Bow 10500 6.3 -M * 5.5 -M *
North French Creek 10130 4.3 4.5 96 5.3 5.4 98
Never Summer 10280 4.7 3.8 124 4.8 -M *
Old Battle 10000 4.4 5.3 83 4.4 6.9 64
Rawah 9020 1.8 1.4 129 4.7 3.9 121
Sage Creek Basin 7850 .7 1.6 44 2.3 3.5 66
Sand Lake 10050 5.1 4.6 111 4.7 5.2 90
South Brush Creek 8440 1.7 1.5 113 3.1 3.6 86
Tower 10500 4.8 7.6 63 7.4 7.9 94
Webber Springs 9250 2.1 2.8 75 4.3 5.3 81
Willow Creek Pass 9540 4.1 2.3 178 4.3 3.3 130
Zirkel 9340 2.1 2.7 78 6.2 6.4 97
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Basin Index (%) 86 92
SWEETWATER
Deer Park 9700 2.3 3.1 74 2.6 4.5 58
Larsen Creek 9000 .7 1.2 58* 2.0 -M *
South Pass 9040 1.6 2.5 64 1.3 3.9 33
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Basin Index (%) 68 46
LOWER N. PLATTE
Casper Mtn. 7900 .8 2.3 35 1.1 4.1 27
Laprele Creek 8375 .4 1.5 27 1.8 3.1 58
Reno Hill 8400 1.3 2.4 54 2.2 3.9 56
Windy Peak 7900 .6 1.3 46 1.8 2.8 64
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Basin Index (%) 41 50
LARAMIE RIVER
Brooklyn Lake 10240 2.0 2.6 77 3.7 4.0 92
Cinnabar Park 9574 3.6 3.1 116 5.4 4.7 115
Crow Creek 8330 .6 .8 75 3.2 2.7 119
Deadman Hill 10220 5.3 3.2 166 5.6 4.0 140
Rawah 9020 1.8 1.4 129 4.7 3.9 121
Roach 9700 3.2 2.4 133 5.1 4.1 124
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Basin Index (%) 122 118
S. PLATTE
Black Mountain 8920 2.0 -M * 3.9 -M *
Crow Creek 8330 .6 .8 75 3.2 2.7 119
Deadman Hill 10220 5.3 3.2 166 5.6 4.0 140
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Basin Index (%) 148 131
LITTLE SNAKE RIVER
Battle Mountain 7440 .1 .7 14* 1.7 3.4 50
Divide Peak 8880 1.3 2.9 45 4.4 4.9 90
Elk River 8700 1.2 1.1 109* 3.7 4.0 92
Little Snake River 8915 1.7 2.5 68* 5.1 6.8 75
Old Battle 10000 4.4 5.3 83 4.4 6.9 64
Sage Creek Basin 7850 .7 1.6 44 2.3 3.5 66
Sandstone RS 8150 1.0 .9 111* 2.2 3.8 58
Whiskey Park 8950 1.5 3.0 50 4.4 5.1 86
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Basin Index (%) 66 73
UPPER GREEN RIVER
Big Sandy Opening 9080 1.9 2.7 70 2.6 3.0 87
Blind Bull Sum 8650 6.6 3.0 220 4.1 3.6 114
East Rim Divide 7930 1.6 1.1 145 2.5 2.4 104
Elkhart Park G.S. 9400 2.1 2.2 95 2.4 3.1 77
Gros Ventre Summit 8750 4.6 2.6 177 4.1 3.0 137
Gunsight Pass 9820 2.8 2.4 117 3.9 3.3 118
Kendall R.S. 7740 1.9 1.4 136 2.7 2.8 96
Loomis Park 8240 2.7 1.9 142 3.2 3.3 97
New Fork Lake 8340 1.6 1.5 107 1.3 2.5 52
Pocket Creek 9360 2.7 -M * 2.7 -M *
Snider Basin 8060 1.1 1.4 79 2.0 2.6 77
Spring Creek Divide 9000 3.9 3.0 130 4.3 4.3 100
Triple Peak 8500 4.0 2.8 143 5.7 4.5 127
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Basin Index (%) 134 101
LOWER GREEN RIVER
Blacks Fork Jct 8869 .4 -M * 1.3 -M *
Buck Pasture 9632 .8 -M * 1.8 -M *
EF Blacks Fork GS 9360 .7 -M * 1.5 -M *
Hams Fork 7840 .0 1.0 0* 1.2 2.4 50
Hewinta 9500 .0 1.1 0 1.6 3.4 47
Hickerson Park 9122 1.1 1.1 100 .9 3.0 30
Hole-in-Rock 9168 .6 .9 67 1.2 2.9 41
Indian Creek 9425 2.7 3.6 75 2.5 4.1 61
Kelley R.S. 8180 1.2 1.7 71 1.8 3.4 53
Spirit Lk 10235 1.0 -M * 1.3 -M *
Steel Creek Park 10158 2.4 2.8 86 2.0 3.8 53
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Basin Index (%) 66 49
UPPER BEAR RIVER
Bear River RS 8777 .5 -M * 1.3 -M *
Bug Lake 7987 1.2 1.8 67* 2.4 3.8 63
Burts Miller Ranch 8000 .1 -M * .7 -M *
Chalk Creek #1 9171 1.0 3.2 31 1.9 5.3 36
Hayden Fork 9130 .7 1.5 47* 1.8 4.4 41
Kelley R.S. 8180 1.2 1.7 71 1.8 3.4 53
Lily Lake 9133 .3 1.6 19 1.4 4.0 35
Monte Cristo 8932 2.4 2.3 104* 2.7 4.9 55
Salt River Summit 7760 1.0 .9 111* 2.2 2.9 76
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Basin Index (%) 60* 49
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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.
