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 MONDAY: MAY 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 9.0 1.2 750* 42.3 24.0 176
Black Bear 8170 45.3 36.0 126 60.1 43.8 137
Blind Bull Sum 8650 -M 22.0 * 39.2 22.8 172
Cottonwood Creek 7670 19.3 10.3 187 44.1 29.5 149
East Rim Divide 7930 .1 3.9 3 23.1 13.9 166
Grand Targhee 9260 54.7 45.1 121 51.8 36.6 142
Granite Creek 6770 11.2 1.2 933* 38.4 22.5 171
Grassy Lake 7265 26.4 22.2 119 61.6 41.1 150
Gros Ventre Summit 8750 -M 8.6 * -M 15.7 *
Gunsight Pass 9820 20.2 12.2 166 28.7 17.4 165
Lewis Lake Divide 7850 37.5 26.2 143 59.8 40.3 148
Phillips Bench 8200 32.7 21.9 149 50.8 32.4 157
Salt River Summit 7760 4.6 1.5 307 32.0 19.5 164
Snake River Station 6920 .0 .0 * 39.2 26.0 151
Spring Creek Divide 9000 38.6 22.6 171 44.9 27.7 162
Thumb Divide 7980 6.3 5.1 124 30.6 22.3 137
Togwotee Pass 9580 32.1 24.5 131 43.4 29.1 149
Two Ocean Plateau 9240 -M 29.2 * -M 32.2 *
Willow Creek 8380 -M 19.5 * 57.7 40.1 144
Younts Peak 8350 5.8 13.8 42 33.6 19.0 177
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Basin Index (%) 139 154
MADISON-GALLATIN
Black Bear 8170 45.3 36.0 126 60.1 43.8 137
Canyon 7870 9.3 5.3 175 28.9 19.4 149
Madison Plateau 7750 19.4 17.2 113 40.2 30.6 131
West Yellowstone 6700 .0 .0 * 26.0 17.1 152
Whiskey Creek 6800 5.1 8.6 59 30.0 23.6 127
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Basin Index (%) 118 138
YELLOWSTONE
Beartooth Lake 9360 32.2 22.6 142 31.9 23.7 135
Burnt Mtn 5880 .0 .0 * 18.7 18.8 99
Canyon 7870 9.3 5.3 175 28.9 19.4 149
Cole Creek 7850 12.1 17.1 71 14.4 18.9 76
Evening Star 9200 34.6 25.3 137 49.6 32.6 152
Fisher Creek 9100 49.9 34.1 146 52.9 37.5 141
Northeast Entrance 7350 .0 .0 * 23.2 15.1 154
Parker Peak 9400 35.5 21.6 164 40.1 21.8 184
Sylvan Lake 8420 17.4 17.0 102 42.2 26.9 157
Thumb Divide 7980 6.3 5.1 124 30.6 22.3 137
Two Ocean Plateau 9240 -M 29.2 * -M 32.2 *
White Mill 8700 34.1 24.4 140 40.0 28.3 141
Wolverine 7650 -M .0 * 23.7 15.1 157
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Basin Index (%) 134 141
WIND RIVER
Burroughs Creek 8750 9.9 -M * 29.3 -M *
Castle Creek 8400 .0 -M * 17.9 -M *
Cold Springs 9630 6.2 .2 3100* 22.5 14.0 161
Deer Park 9700 30.4 13.5 225 43.6 25.5 171
Hobbs Park 10100 30.3 15.0 202 34.8 18.6 187
Kirwin 9550 19.2 10.4 185 29.3 15.4 190
Little Warm 9370 12.3 6.1 202 27.6 16.9 163
Owl Creek 8975 .0 .0 * 15.6 9.2 170
South Pass 9040 27.3 10.1 270 33.9 22.1 153
St. Lawrence Alt 8620 .0 .1 0* 20.8 13.1 159
Togwotee Pass 9580 32.1 24.5 131 43.4 29.1 149
Townsend Creek 8700 12.4 1.2 1033 28.5 16.6 172
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Basin Index (%) 210 166
BIGHORN BASIN
Bald Mtn. 9380 20.2 20.7 98 21.6 21.7 100
Bear Trap Meadow 8200 .0 .0 * 15.0 12.2 123
Bone Springs Div 9350 18.6 15.9 117 22.5 20.3 111
Grave Springs 8550 4.8 6.4 75 13.7 14.7 93
Kirwin 9550 19.2 10.4 185 29.3 15.4 190
Marquette 8760 13.9 -M * 23.8 -M *
Middle Powder 7760 5.1 8.9 57 15.0 15.9 94
Owl Creek 8975 .0 .0 * 15.6 9.2 170
Powder River Pass 9480 4.0 8.3 48 18.2 16.8 108
Shell Creek 9580 14.5 16.6 87 18.8 18.1 104
Timber Creek 7950 .0 .0 * 15.1 11.7 129
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Basin Index (%) 99 118
SHOSHONE RIVER
Blackwater 9780 39.0 24.8 157 46.7 25.3 185
Evening Star 9200 34.6 25.3 137 49.6 32.6 152
Marquette 8760 13.9 -M * 23.8 -M *
Sylvan Road 7120 .0 .0 * 32.5 19.8 164
Younts Peak 8350 5.8 13.8 42 33.6 19.0 177
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Basin Index (%) 124 168
POWDER RIVER
Bear Trap Meadow 8200 .0 .0 * 15.0 12.2 123
Cloud Peak Reservoir 9860 17.5 16.3 107 26.6 19.0 140
Grave Springs 8550 4.8 6.4 75 13.7 14.7 93
Hansen Sawmill 8360 7.7 .0 * 18.7 12.5 150
Middle Powder 7760 5.1 8.9 57 15.0 15.9 94
Powder River Pass 9480 4.0 8.3 48 18.2 16.8 108
Soldier Park 8720 8.8 -M * 20.7 -M *
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Basin Index (%) 98 118
TONGUE RIVER
Big Goose 7990 8.9 8.8 101 20.2 16.6 122
Bone Springs Div 9350 18.6 15.9 117 22.5 20.3 111
Burgess Junction 7880 7.5 10.6 71 16.3 16.6 98
Dome Lake 8880 13.9 9.7 143 22.5 18.5 122
Little Goose 8870 11.8 -M * 24.4 -M *
Sucker Creek 8880 10.3 11.3 91 19.3 19.7 98
Tie Creek 6870 .1 .2 50* 20.1 16.8 120
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Basin Index (%) 105 111
BELLE FOURCHE
Cole Canyon 5910 .0 .0 * 12.4 14.4 86
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Basin Index (%) * 86
CHEYENNE RIVER BASIN
Blind Park 6890 .1 .0 * 12.9 16.2 80
North Rapid Creek 6130 .0 .0 * 11.0 14.2 77
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Basin Index (%) * 79
UPPER N. PLATTE
Arapaho Ridge 10960 21.4 21.6 99 30.4 28.2 108
Blackhall Mtn 9820 29.7 -M * 42.0 -M *
Columbine 9160 .0 8.5 0 32.4 30.2 107
Divide Peak 8880 .1 10.5 1 26.6 26.0 102
Joe Wright 10120 14.2 22.8 62 33.9 32.2 105
Laprele Creek 8375 .3 .0 * 15.9 16.4 97
Med Bow 10500 36.4 -M * 41.3 -M *
North French Creek 10130 22.9 32.1 71 34.3 33.0 104
Never Summer 10280 21.9 22.1 99 23.2 -M *
Old Battle 10000 35.7 35.1 102 43.6 41.5 105
Rawah 9020 .1 1.4 7 20.8 18.8 111
Sage Creek Basin 7850 -M .0 * 18.2 17.2 106
Sand Lake 10050 31.1 30.5 102 32.3 31.2 104
South Brush Creek 8440 .0 1.5 0 16.8 19.6 86
Tower 10500 38.6 49.9 77 52.0 47.2 110
Webber Springs 9250 13.5 16.4 82 37.5 31.7 118
Willow Creek Pass 9540 13.3 11.4 117 21.0 17.0 124
Zirkel 9340 12.8 16.7 77 47.3 33.2 142
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Basin Index (%) 81 109
SWEETWATER
Deer Park 9700 30.4 13.5 225 43.6 25.5 171
Larsen Creek 9000 .3 5.0 6 26.2 -M *
South Pass 9040 27.3 10.1 270 33.9 22.1 153
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Basin Index (%) 203 163
LOWER N. PLATTE
Casper Mtn. 7900 1.9 9.1 21 19.8 19.9 99
Laprele Creek 8375 .3 .0 * 15.9 16.4 97
Reno Hill 8400 1.9 7.8 24 20.1 20.8 97
Windy Peak 7900 .0 .0 * 15.4 14.2 108
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Basin Index (%) 24 100
LARAMIE RIVER
Brooklyn Lake 10240 14.2 19.7 72 27.0 26.6 102
Cinnabar Park 9574 7.3 15.3 48 27.0 29.2 92
Crow Creek 8330 .0 .0 * 12.5 14.9 84
Deadman Hill 10220 16.2 18.3 89 25.2 22.4 112
Rawah 9020 .1 1.4 7 20.8 18.8 111
Roach 9700 9.6 13.9 69 25.8 24.0 108
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Basin Index (%) 69 102
S. PLATTE
Black Mountain 8920 -M -M * 16.9 -M *
Crow Creek 8330 .0 .0 * 12.5 14.9 84
Deadman Hill 10220 16.2 18.3 89 25.2 22.4 112
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Basin Index (%) 89* 101
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * 19.6 18.4 107
Divide Peak 8880 .1 10.5 1 26.6 26.0 102
Elk River 8700 .1 3.3 3 23.2 24.2 96
Little Snake River 8915 13.5 18.0 75 43.7 34.9 125
Old Battle 10000 35.7 35.1 102 43.6 41.5 105
Sage Creek Basin 7850 -M .0 * 18.2 17.2 106
Sandstone RS 8150 .0 .0 * 19.5 22.2 88
Whiskey Park 8950 17.9 24.6 73 35.4 33.5 106
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Basin Index (%) 74 105
UPPER GREEN RIVER
Big Sandy Opening 9080 13.1 7.6 172 25.9 16.5 157
Blind Bull Sum 8650 -M 22.0 * 39.2 22.8 172
East Rim Divide 7930 .1 3.9 3 23.1 13.9 166
Elkhart Park G.S. 9400 12.7 8.5 149 27.0 16.4 165
Gros Ventre Summit 8750 -M 8.6 * -M 15.7 *
Gunsight Pass 9820 20.2 12.2 166 28.7 17.4 165
Kendall R.S. 7740 .2 .0 * 31.3 16.5 190
Loomis Park 8240 14.5 5.9 246 35.2 20.2 174
New Fork Lake 8340 .6 1.1 55 21.0 13.2 159
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 .0 4.8 0 29.3 16.6 177
Spring Creek Divide 9000 38.6 22.6 171 44.9 27.7 162
Triple Peak 8500 25.2 12.7 198 44.8 29.7 151
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Basin Index (%) 158 166
LOWER GREEN RIVER
Blacks Fork Jct 8869 .0 -M * 19.1 -M *
Buck Pasture 9632 6.2 -M * 27.6 -M *
EF Blacks Fork GS 9360 -M -M * 23.1 -M *
Hams Fork 7840 .0 .0 * 24.0 14.2 169
Hewinta 9500 .0 .1 0* 21.1 17.5 121
Hickerson Park 9122 .0 .0 * 14.9 13.2 113
Hole-in-Rock 9168 .0 .0 * 15.8 12.7 124
Indian Creek 9425 34.8 21.2 164 45.2 26.6 170
Kelley R.S. 8180 8.4 6.4 131 34.0 21.5 158
Spirit Lk 10235 4.8 -M * 21.0 -M *
Steel Creek Park 10158 16.2 16.5 98 25.5 20.7 123
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Basin Index (%) 134* 143
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 21.5 -M *
Bug Lake 7987 21.1 10.2 207 37.6 23.1 163
Burts Miller Ranch 8000 .0 -M * 11.9 -M *
Chalk Creek #1 9171 24.8 19.4 128 41.1 30.4 135
Hayden Fork 9130 .4 3.1 13 32.5 25.5 127
Kelley R.S. 8180 8.4 6.4 131 34.0 21.5 158
Lily Lake 9133 .0 1.2 0* 23.0 21.0 110
Monte Cristo 8932 28.3 19.0 149 44.7 31.2 143
Salt River Summit 7760 4.6 1.5 307 32.0 19.5 164
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Basin Index (%) 144 142
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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.