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 THURSDAY: MAY 4 , 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 19.3 7.8 247 42.2 23.1 183
Black Bear 8170 50.5 37.3 135 59.8 42.2 142
Blind Bull Sum 8650 48.8 22.8 214 39.0 21.6 181
Cottonwood Creek 7670 28.7 14.4 199 44.0 27.8 158
East Rim Divide 7930 8.6 7.7 112 22.5 13.1 172
Grand Targhee 9260 59.3 45.7 130 51.1 35.2 145
Granite Creek 6770 20.4 7.6 268 38.4 21.6 178
Grassy Lake 7265 39.8 27.9 143 61.5 39.7 155
Gros Ventre Summit 8750 20.4 11.1 184 26.6 14.9 179
Gunsight Pass 9820 26.2 12.0 218 28.2 16.3 173
Lewis Lake Divide 7850 48.1 29.6 162 59.8 39.0 153
Phillips Bench 8200 41.3 24.5 169 50.7 31.0 164
Salt River Summit 7760 16.9 7.4 228 32.0 18.6 172
Snake River Station 6920 12.9 5.6 230 39.3 25.0 157
Spring Creek Divide 9000 44.6 24.3 184 44.6 26.5 168
Thumb Divide 7980 19.1 10.8 177 30.5 21.3 143
Togwotee Pass 9580 36.9 24.7 149 43.1 27.7 156
Two Ocean Plateau 9240 -M 29.9 * -M 30.5 *
Willow Creek 8380 29.4 22.0 134 57.6 38.1 151
Younts Peak 8350 21.7 15.8 137 33.7 18.0 187
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Basin Index (%) 165 161
MADISON-GALLATIN
Black Bear 8170 50.5 37.3 135 59.8 42.2 142
Canyon 7870 18.1 9.1 199 28.8 18.2 158
Madison Plateau 7750 30.1 20.9 144 40.0 29.2 137
West Yellowstone 6700 .0 .2 0* 26.0 16.2 160
Whiskey Creek 6800 12.0 13.3 90 29.8 22.6 132
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Basin Index (%) 137 144
YELLOWSTONE
Beartooth Lake 9360 36.3 22.7 160 31.6 22.2 142
Burnt Mtn 5880 .0 .0 * 18.5 16.2 114
Canyon 7870 18.1 9.1 199 28.8 18.2 158
Cole Creek 7850 17.2 16.7 103 14.3 16.7 86
Evening Star 9200 41.7 24.9 167 49.3 30.8 160
Fisher Creek 9100 48.3 32.7 148 52.5 35.5 148
Northeast Entrance 7350 .8 1.6 50 23.1 14.0 165
Parker Peak 9400 42.9 21.2 202 40.0 20.3 197
Sylvan Lake 8420 26.6 19.0 140 42.0 25.4 165
Thumb Divide 7980 19.1 10.8 177 30.5 21.3 143
Two Ocean Plateau 9240 -M 29.9 * -M 30.5 *
White Mill 8700 40.4 24.0 168 40.0 26.6 150
Wolverine 7650 1.4 1.1 127 23.8 14.0 170
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Basin Index (%) 159 151
WIND RIVER
Burroughs Creek 8750 19.2 -M * 29.3 -M *
Castle Creek 8400 5.9 -M * 17.3 -M *
Cold Springs 9630 15.2 1.4 1086 22.3 12.7 176
Deer Park 9700 36.8 15.4 239 43.4 23.8 182
Hobbs Park 10100 34.8 16.0 218 34.5 17.0 203
Kirwin 9550 25.4 10.6 240 29.2 14.1 207
Little Warm 9370 19.0 8.1 235 27.2 15.6 174
Owl Creek 8975 7.8 .6 1300 15.3 8.1 189
South Pass 9040 33.8 14.1 240 33.7 20.7 163
St. Lawrence Alt 8620 8.8 2.0 440 20.6 11.8 175
Togwotee Pass 9580 36.9 24.7 149 43.1 27.7 156
Townsend Creek 8700 19.3 6.6 292 28.2 15.2 186
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Basin Index (%) 239 178
BIGHORN BASIN
Bald Mtn. 9380 24.7 20.4 121 21.5 20.0 108
Bear Trap Meadow 8200 6.6 .4 1650* 14.9 10.9 137
Bone Springs Div 9350 23.9 16.4 146 21.7 18.6 117
Grave Springs 8550 11.4 9.3 123 13.7 13.1 105
Kirwin 9550 25.4 10.6 240 29.2 14.1 207
Marquette 8760 20.4 -M * 23.8 -M *
Middle Powder 7760 13.6 11.4 119 14.2 14.4 99
Owl Creek 8975 7.8 .6 1300 15.3 8.1 189
Powder River Pass 9480 11.8 9.1 130 18.1 15.4 118
Shell Creek 9580 20.4 16.0 128 18.3 16.6 110
Timber Creek 7950 7.3 2.5 292 15.1 10.2 148
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Basin Index (%) 158 129
SHOSHONE RIVER
Blackwater 9780 42.1 25.8 163 46.4 23.8 195
Evening Star 9200 41.7 24.9 167 49.3 30.8 160
Marquette 8760 20.4 -M * 23.8 -M *
Sylvan Road 7120 .0 4.1 0 32.5 18.8 173
Younts Peak 8350 21.7 15.8 137 33.7 18.0 187
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Basin Index (%) 149 177
POWDER RIVER
Bear Trap Meadow 8200 6.6 .4 1650* 14.9 10.9 137
Cloud Peak Reservoir 9860 22.0 16.3 135 26.3 17.0 155
Grave Springs 8550 11.4 9.3 123 13.7 13.1 105
Hansen Sawmill 8360 15.4 1.7 906 18.9 11.1 170
Middle Powder 7760 13.6 11.4 119 14.2 14.4 99
Powder River Pass 9480 11.8 9.1 130 18.1 15.4 118
Soldier Park 8720 17.9 -M * 20.5 -M *
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Basin Index (%) 168 130
TONGUE RIVER
Big Goose 7990 15.2 9.4 162 20.0 14.4 139
Bone Springs Div 9350 23.9 16.4 146 21.7 18.6 117
Burgess Junction 7880 13.4 11.8 114 15.8 15.1 105
Dome Lake 8880 19.7 11.3 174 22.0 16.7 132
Little Goose 8870 19.1 -M * 24.0 -M *
Sucker Creek 8880 16.4 11.9 138 19.0 17.7 107
Tie Creek 6870 4.2 2.5 168 19.7 14.7 134
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Basin Index (%) 147 122
BELLE FOURCHE
Cole Canyon 5910 1.3 .0 * 12.0 12.4 97
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Basin Index (%) * 97
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .2 0* 11.7 14.6 80
North Rapid Creek 6130 .0 .0 * 10.0 12.6 79
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Basin Index (%) 0* 80
UPPER N. PLATTE
Arapaho Ridge 10960 26.9 22.3 121 29.9 26.5 113
Blackhall Mtn 9820 37.1 -M * 42.1 -M *
Columbine 9160 12.7 17.1 74 32.0 28.9 111
Divide Peak 8880 12.1 17.5 69 26.0 24.8 105
Joe Wright 10120 19.5 22.9 85 33.4 30.4 110
Laprele Creek 8375 6.0 5.4 111 15.0 15.3 98
Med Bow 10500 40.8 -M * 41.2 -M *
North French Creek 10130 28.9 32.7 88 34.0 31.2 109
Never Summer 10280 25.4 21.8 117 22.6 -M *
Old Battle 10000 40.4 34.8 116 43.1 39.7 109
Rawah 9020 5.8 4.8 121 20.6 17.6 117
Sage Creek Basin 7850 -M .8 * 18.0 16.4 110
Sand Lake 10050 33.5 31.6 106 32.2 29.5 109
South Brush Creek 8440 .3 7.9 4 15.5 18.2 85
Tower 10500 44.5 50.7 88 50.9 45.3 112
Webber Springs 9250 22.9 21.1 109 37.0 30.3 122
Willow Creek Pass 9540 19.3 14.5 133 20.5 16.0 128
Zirkel 9340 24.8 20.7 120 46.7 31.3 149
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Basin Index (%) 99 113
SWEETWATER
Deer Park 9700 36.8 15.4 239 43.4 23.8 182
Larsen Creek 9000 11.9 8.3 143 26.0 -M *
South Pass 9040 33.8 14.1 240 33.7 20.7 163
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Basin Index (%) 218 173
LOWER N. PLATTE
Casper Mtn. 7900 12.9 12.5 103 18.7 18.4 102
Laprele Creek 8375 6.0 5.4 111 15.0 15.3 98
Reno Hill 8400 13.5 12.1 112 18.6 19.3 96
Windy Peak 7900 3.6 3.1 116 14.1 13.2 107
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Basin Index (%) 109 100
LARAMIE RIVER
Brooklyn Lake 10240 21.6 23.0 94 26.6 25.1 106
Cinnabar Park 9574 14.5 18.8 77 26.8 27.3 98
Crow Creek 8330 .0 .0 * 12.3 13.7 90
Deadman Hill 10220 22.8 19.1 119 24.9 21.0 119
Rawah 9020 5.8 4.8 121 20.6 17.6 117
Roach 9700 16.9 17.1 99 25.3 22.6 112
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Basin Index (%) 99 107
S. PLATTE
Black Mountain 8920 8.5 -M * 16.4 -M *
Crow Creek 8330 .0 .0 * 12.3 13.7 90
Deadman Hill 10220 22.8 19.1 119 24.9 21.0 119
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Basin Index (%) 119* 107
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * 19.4 17.4 111
Divide Peak 8880 12.1 17.5 69 26.0 24.8 105
Elk River 8700 5.2 12.0 43 23.3 23.1 101
Little Snake River 8915 23.5 21.7 108 43.4 33.2 131
Old Battle 10000 40.4 34.8 116 43.1 39.7 109
Sage Creek Basin 7850 -M .8 * 18.0 16.4 110
Sandstone RS 8150 -M 4.6 * 19.0 21.0 90
Whiskey Park 8950 24.6 26.9 91 35.3 32.0 110
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Basin Index (%) 94 110
UPPER GREEN RIVER
Big Sandy Opening 9080 22.3 9.4 237 25.8 15.5 166
Blind Bull Sum 8650 48.8 22.8 214 39.0 21.6 181
East Rim Divide 7930 8.6 7.7 112 22.5 13.1 172
Elkhart Park G.S. 9400 20.9 10.6 197 26.3 15.2 173
Gros Ventre Summit 8750 20.4 11.1 184 26.6 14.9 179
Gunsight Pass 9820 26.2 12.0 218 28.2 16.3 173
Kendall R.S. 7740 12.9 2.6 496 30.6 15.7 195
Loomis Park 8240 23.3 10.0 233 34.4 19.2 179
New Fork Lake 8340 11.2 5.5 204 19.6 12.3 159
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 13.1 8.5 154 29.2 15.8 185
Spring Creek Divide 9000 44.6 24.3 184 44.6 26.5 168
Triple Peak 8500 36.4 16.3 223 44.9 28.2 159
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Basin Index (%) 205 173
LOWER GREEN RIVER
Blacks Fork Jct 8869 4.6 -M * 18.8 -M *
Buck Pasture 9632 16.4 -M * 27.3 -M *
EF Blacks Fork GS 9360 12.4 -M * 21.5 -M *
Hams Fork 7840 8.5 1.5 567 23.8 13.3 179
Hewinta 9500 7.2 4.2 171 20.9 16.5 127
Hickerson Park 9122 2.8 3.2 88 14.9 12.2 122
Hole-in-Rock 9168 3.5 1.7 206 15.7 11.8 133
Indian Creek 9425 44.5 22.1 201 45.0 25.3 178
Kelley R.S. 8180 24.1 10.4 232 33.7 20.5 164
Spirit Lk 10235 15.6 -M * 20.9 -M *
Steel Creek Park 10158 22.4 17.4 129 25.3 19.5 130
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Basin Index (%) 187 151
UPPER BEAR RIVER
Bear River RS 8777 .5 -M * 21.4 -M *
Bug Lake 7987 32.1 13.8 233 37.6 22.0 171
Burts Miller Ranch 8000 .0 -M * 11.9 -M *
Chalk Creek #1 9171 35.0 23.4 150 41.1 28.9 142
Hayden Fork 9130 14.2 8.6 165 33.4 24.1 139
Kelley R.S. 8180 24.1 10.4 232 33.7 20.5 164
Lily Lake 9133 12.4 9.7 128 23.0 19.9 116
Monte Cristo 8932 39.4 25.3 156 44.6 29.7 150
Salt River Summit 7760 16.9 7.4 228 32.0 18.6 172
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Basin Index (%) 177 150
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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.