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 FRIDAY: MAY 5 , 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 18.2 7.2 253 42.2 23.2 182
Black Bear 8170 50.8 37.2 137 59.8 42.3 141
Blind Bull Sum 8650 48.4 22.7 213 39.0 21.7 180
Cottonwood Creek 7670 27.7 14.1 196 44.0 28.0 157
East Rim Divide 7930 6.9 7.4 93 22.5 13.1 172
Grand Targhee 9260 60.4 46.0 131 51.1 35.3 145
Granite Creek 6770 19.4 7.4 262 38.4 21.6 178
Grassy Lake 7265 39.2 27.6 142 61.5 39.8 155
Gros Ventre Summit 8750 20.1 10.8 186 26.5 14.9 178
Gunsight Pass 9820 26.4 11.8 224 28.2 16.3 173
Lewis Lake Divide 7850 47.1 29.5 160 59.9 39.1 153
Phillips Bench 8200 40.9 24.2 169 50.7 31.1 163
Salt River Summit 7760 15.9 7.1 224 31.9 18.6 172
Snake River Station 6920 11.7 5.1 229 39.2 25.1 156
Spring Creek Divide 9000 44.4 24.2 183 44.6 26.6 168
Thumb Divide 7980 17.8 10.3 173 30.5 21.3 143
Togwotee Pass 9580 36.7 24.8 148 43.1 27.8 155
Two Ocean Plateau 9240 -M 29.9 * -M 30.6 *
Willow Creek 8380 28.8 21.8 132 57.6 38.3 150
Younts Peak 8350 20.5 15.7 131 33.7 18.0 187
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Basin Index (%) 164 160
MADISON-GALLATIN
Black Bear 8170 50.8 37.2 137 59.8 42.3 141
Canyon 7870 17.4 8.8 198 28.9 18.3 158
Madison Plateau 7750 29.5 20.8 142 40.0 29.4 136
West Yellowstone 6700 .0 .0 * 26.0 16.2 160
Whiskey Creek 6800 11.4 12.9 88 29.9 22.6 132
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Basin Index (%) 137 143
YELLOWSTONE
Beartooth Lake 9360 36.2 22.7 159 31.7 22.3 142
Burnt Mtn 5880 .0 .0 * 18.5 16.2 114
Canyon 7870 17.4 8.8 198 28.9 18.3 158
Cole Creek 7850 16.8 16.8 100 14.2 16.8 85
Evening Star 9200 41.6 24.9 167 49.3 30.9 160
Fisher Creek 9100 48.5 32.9 147 52.7 35.7 148
Northeast Entrance 7350 .0 1.2 0 23.0 14.0 164
Parker Peak 9400 43.1 21.3 202 40.1 20.4 197
Sylvan Lake 8420 26.1 18.7 140 42.0 25.5 165
Thumb Divide 7980 17.8 10.3 173 30.5 21.3 143
Two Ocean Plateau 9240 -M 29.9 * -M 30.6 *
White Mill 8700 40.8 24.0 170 40.0 26.7 150
Wolverine 7650 .2 .8 25* 23.8 14.0 170
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Basin Index (%) 158 151
WIND RIVER
Burroughs Creek 8750 18.1 -M * 29.3 -M *
Castle Creek 8400 5.0 -M * 17.3 -M *
Cold Springs 9630 14.5 1.5 967 22.4 12.8 175
Deer Park 9700 36.2 15.1 240 43.4 23.8 182
Hobbs Park 10100 34.7 15.9 218 34.5 17.1 202
Kirwin 9550 24.9 10.7 233 29.3 14.2 206
Little Warm 9370 18.6 7.8 238 27.2 15.7 173
Owl Creek 8975 6.6 .6 1100 15.3 8.2 187
South Pass 9040 33.4 13.8 242 33.8 20.8 162
St. Lawrence Alt 8620 8.3 1.8 461 20.6 11.8 175
Togwotee Pass 9580 36.7 24.8 148 43.1 27.8 155
Townsend Creek 8700 18.9 6.2 305 28.2 15.2 186
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Basin Index (%) 237 178
BIGHORN BASIN
Bald Mtn. 9380 24.0 20.4 118 21.5 20.1 107
Bear Trap Meadow 8200 5.9 .3 1967* 14.9 11.0 135
Bone Springs Div 9350 23.8 16.4 145 21.7 18.6 117
Grave Springs 8550 11.1 9.1 122 13.7 13.1 105
Kirwin 9550 24.9 10.7 233 29.3 14.2 206
Marquette 8760 20.1 -M * 23.9 -M *
Middle Powder 7760 13.2 11.3 117 14.2 14.5 98
Owl Creek 8975 6.6 .6 1100 15.3 8.2 187
Powder River Pass 9480 11.3 9.1 124 18.2 15.4 118
Shell Creek 9580 20.1 16.2 124 18.4 16.7 110
Timber Creek 7950 6.6 2.3 287 15.1 10.3 147
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Basin Index (%) 153 128
SHOSHONE RIVER
Blackwater 9780 42.0 25.8 163 46.4 23.9 194
Evening Star 9200 41.6 24.9 167 49.3 30.9 160
Marquette 8760 20.1 -M * 23.9 -M *
Sylvan Road 7120 .0 3.7 0 32.4 18.9 171
Younts Peak 8350 20.5 15.7 131 33.7 18.0 187
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Basin Index (%) 149 176
POWDER RIVER
Bear Trap Meadow 8200 5.9 .3 1967* 14.9 11.0 135
Cloud Peak Reservoir 9860 20.9 16.4 127 26.4 17.1 154
Grave Springs 8550 11.1 9.1 122 13.7 13.1 105
Hansen Sawmill 8360 14.8 1.7 871 18.9 11.1 170
Middle Powder 7760 13.2 11.3 117 14.2 14.5 98
Powder River Pass 9480 11.3 9.1 124 18.2 15.4 118
Soldier Park 8720 17.3 -M * 20.5 -M *
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Basin Index (%) 161 129
TONGUE RIVER
Big Goose 7990 14.8 9.6 154 20.1 14.5 139
Bone Springs Div 9350 23.8 16.4 145 21.7 18.6 117
Burgess Junction 7880 13.1 11.7 112 15.9 15.1 105
Dome Lake 8880 19.5 11.3 173 22.0 16.8 131
Little Goose 8870 18.7 -M * 24.0 -M *
Sucker Creek 8880 15.8 12.0 132 19.0 17.8 107
Tie Creek 6870 3.5 2.4 146 19.7 14.8 133
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Basin Index (%) 143 121
BELLE FOURCHE
Cole Canyon 5910 .6 .0 * 12.1 12.4 98
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Basin Index (%) * 98
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 11.7 14.7 80
North Rapid Creek 6130 .0 .0 * 10.0 12.6 79
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Basin Index (%) * 79
UPPER N. PLATTE
Arapaho Ridge 10960 26.2 22.2 118 29.9 26.8 112
Blackhall Mtn 9820 37.0 -M * 42.2 -M *
Columbine 9160 11.9 16.5 72 32.1 29.1 110
Divide Peak 8880 11.4 17.1 67 26.1 24.8 105
Joe Wright 10120 19.3 22.8 85 33.4 30.6 109
Laprele Creek 8375 5.0 5.2 96 15.2 15.4 99
Med Bow 10500 39.5 -M * 41.3 -M *
North French Creek 10130 28.5 32.7 87 34.0 31.3 109
Never Summer 10280 25.0 21.9 114 22.7 -M *
Old Battle 10000 40.4 35.0 115 43.2 39.8 109
Rawah 9020 4.9 4.4 111 20.7 17.7 117
Sage Creek Basin 7850 -M .6 * 18.0 16.5 109
Sand Lake 10050 33.7 31.6 107 32.3 29.6 109
South Brush Creek 8440 .4 7.5 5 15.9 18.3 87
Tower 10500 44.5 51.0 87 51.0 45.5 112
Webber Springs 9250 23.3 20.8 112 37.0 30.4 122
Willow Creek Pass 9540 19.0 14.5 131 20.5 16.1 127
Zirkel 9340 24.6 20.6 119 46.8 31.5 149
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Basin Index (%) 98 113
SWEETWATER
Deer Park 9700 36.2 15.1 240 43.4 23.8 182
Larsen Creek 9000 10.6 8.0 132 26.0 -M *
South Pass 9040 33.4 13.8 242 33.8 20.8 162
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Basin Index (%) 217 173
LOWER N. PLATTE
Casper Mtn. 7900 12.6 12.2 103 18.7 18.5 101
Laprele Creek 8375 5.0 5.2 96 15.2 15.4 99
Reno Hill 8400 13.0 12.0 108 18.8 19.4 97
Windy Peak 7900 2.7 2.8 96 14.1 13.3 106
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Basin Index (%) 103 100
LARAMIE RIVER
Brooklyn Lake 10240 21.2 22.8 93 26.8 25.2 106
Cinnabar Park 9574 14.1 18.5 76 26.8 27.5 97
Crow Creek 8330 .0 .0 * 12.3 13.8 89
Deadman Hill 10220 22.4 19.1 117 24.9 21.1 118
Rawah 9020 4.9 4.4 111 20.7 17.7 117
Roach 9700 16.5 17.0 97 25.3 22.8 111
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Basin Index (%) 97 107
S. PLATTE
Black Mountain 8920 7.7 -M * 16.4 -M *
Crow Creek 8330 .0 .0 * 12.3 13.8 89
Deadman Hill 10220 22.4 19.1 117 24.9 21.1 118
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Basin Index (%) 117* 107
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * 19.4 17.4 111
Divide Peak 8880 11.4 17.1 67 26.1 24.8 105
Elk River 8700 3.9 11.3 35 23.2 23.2 100
Little Snake River 8915 22.7 21.4 106 43.5 33.3 131
Old Battle 10000 40.4 35.0 115 43.2 39.8 109
Sage Creek Basin 7850 -M .6 * 18.0 16.5 109
Sandstone RS 8150 -M 4.1 * 19.2 21.1 91
Whiskey Park 8950 24.5 27.0 91 35.2 32.1 110
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Basin Index (%) 92 109
UPPER GREEN RIVER
Big Sandy Opening 9080 21.7 9.0 241 25.7 15.5 166
Blind Bull Sum 8650 48.4 22.7 213 39.0 21.7 180
East Rim Divide 7930 6.9 7.4 93 22.5 13.1 172
Elkhart Park G.S. 9400 20.5 10.3 199 26.3 15.3 172
Gros Ventre Summit 8750 20.1 10.8 186 26.5 14.9 178
Gunsight Pass 9820 26.4 11.8 224 28.2 16.3 173
Kendall R.S. 7740 11.9 2.0 595 30.6 15.7 195
Loomis Park 8240 22.0 9.5 232 34.5 19.2 180
New Fork Lake 8340 10.1 5.0 202 19.7 12.4 159
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 12.6 8.2 154 29.2 15.8 185
Spring Creek Divide 9000 44.4 24.2 183 44.6 26.6 168
Triple Peak 8500 36.2 15.9 228 44.9 28.3 159
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Basin Index (%) 206 173
LOWER GREEN RIVER
Blacks Fork Jct 8869 3.4 -M * 18.7 -M *
Buck Pasture 9632 15.8 -M * 27.3 -M *
EF Blacks Fork GS 9360 11.6 -M * 21.6 -M *
Hams Fork 7840 7.0 1.1 636 23.9 13.3 180
Hewinta 9500 6.2 4.0 155 20.9 16.6 126
Hickerson Park 9122 1.5 2.7 56 14.9 12.3 121
Hole-in-Rock 9168 2.1 1.5 140 15.7 11.9 132
Indian Creek 9425 43.6 21.8 200 45.1 25.4 178
Kelley R.S. 8180 -M 10.0 * 33.7 20.5 164
Spirit Lk 10235 15.2 -M * 20.9 -M *
Steel Creek Park 10158 22.1 17.5 126 25.3 19.6 129
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Basin Index (%) 170 150
UPPER BEAR RIVER
Bear River RS 8777 .1 -M * 21.3 -M *
Bug Lake 7987 32.6 13.4 243 37.6 22.1 170
Burts Miller Ranch 8000 .0 -M * 11.9 -M *
Chalk Creek #1 9171 34.5 23.2 149 41.1 29.1 141
Hayden Fork 9130 13.0 8.1 160 33.3 24.3 137
Kelley R.S. 8180 -M 10.0 * 33.7 20.5 164
Lily Lake 9133 11.6 9.2 126 23.0 20.0 115
Monte Cristo 8932 38.9 24.6 158 44.6 29.9 149
Salt River Summit 7760 15.9 7.1 224 31.9 18.6 172
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Basin Index (%) 171 149
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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.