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: MAY 3 , 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 19.8 8.4 236 42.2 22.9 184
Black Bear 8170 50.4 37.3 135 59.8 42.0 142
Blind Bull Sum 8650 48.5 22.9 212 39.0 21.5 181
Cottonwood Creek 7670 29.4 14.7 200 44.0 27.7 159
East Rim Divide 7930 9.6 7.9 122 22.5 13.0 173
Grand Targhee 9260 58.1 45.5 128 51.1 34.9 146
Granite Creek 6770 20.8 7.8 267 38.2 21.5 178
Grassy Lake 7265 39.9 28.3 141 61.5 39.5 156
Gros Ventre Summit 8750 20.8 11.3 184 26.5 14.7 180
Gunsight Pass 9820 26.0 12.1 215 28.2 16.2 174
Lewis Lake Divide 7850 48.4 29.7 163 59.8 38.8 154
Phillips Bench 8200 41.5 24.8 167 50.8 30.9 164
Salt River Summit 7760 17.5 7.6 230 31.9 18.5 172
Snake River Station 6920 13.6 6.2 219 39.3 24.9 158
Spring Creek Divide 9000 44.7 24.3 184 44.6 26.4 169
Thumb Divide 7980 19.7 11.3 174 30.5 21.1 145
Togwotee Pass 9580 37.0 24.7 150 43.1 27.5 157
Two Ocean Plateau 9240 -M 29.9 * -M 30.3 *
Willow Creek 8380 28.7 22.3 129 57.6 37.9 152
Younts Peak 8350 22.6 15.7 144 33.7 17.8 189
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Basin Index (%) 165 162
MADISON-GALLATIN
Black Bear 8170 50.4 37.3 135 59.8 42.0 142
Canyon 7870 18.4 9.6 192 28.8 18.1 159
Madison Plateau 7750 30.0 21.0 143 40.0 29.1 137
West Yellowstone 6700 .0 .6 0* 26.0 16.0 162
Whiskey Creek 6800 12.3 13.8 89 29.8 22.5 132
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Basin Index (%) 135 144
YELLOWSTONE
Beartooth Lake 9360 36.4 22.7 160 31.5 22.1 143
Burnt Mtn 5880 .0 .0 * 18.5 16.1 115
Canyon 7870 18.4 9.6 192 28.8 18.1 159
Cole Creek 7850 17.3 16.7 104 14.2 16.6 86
Evening Star 9200 41.7 24.8 168 49.2 30.6 161
Fisher Creek 9100 48.3 32.6 148 52.5 35.4 148
Northeast Entrance 7350 2.1 2.0 105 23.1 13.9 166
Parker Peak 9400 42.9 21.2 202 40.0 20.2 198
Sylvan Lake 8420 26.9 19.3 139 42.0 25.3 166
Thumb Divide 7980 19.7 11.3 174 30.5 21.1 145
Two Ocean Plateau 9240 -M 29.9 * -M 30.3 *
White Mill 8700 40.6 23.9 170 40.0 26.5 151
Wolverine 7650 2.5 1.4 179 23.7 13.9 171
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Basin Index (%) 160 152
WIND RIVER
Burroughs Creek 8750 19.8 -M * 29.2 -M *
Castle Creek 8400 6.7 -M * 17.4 -M *
Cold Springs 9630 16.0 1.3 1231 22.3 12.6 177
Deer Park 9700 36.9 15.7 235 43.4 23.6 184
Hobbs Park 10100 34.9 16.0 218 34.4 16.9 204
Kirwin 9550 25.7 10.6 242 29.1 14.0 208
Little Warm 9370 19.3 8.4 230 27.2 15.5 175
Owl Creek 8975 8.5 .7 1214 15.3 8.1 189
South Pass 9040 34.2 14.4 238 33.6 20.5 164
St. Lawrence Alt 8620 9.3 2.1 443 20.5 11.7 175
Togwotee Pass 9580 37.0 24.7 150 43.1 27.5 157
Townsend Creek 8700 19.7 6.9 286 28.1 15.1 186
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Basin Index (%) 240 179
BIGHORN BASIN
Bald Mtn. 9380 24.7 20.5 120 21.3 19.9 107
Bear Trap Meadow 8200 7.0 .6 1167 14.8 10.8 137
Bone Springs Div 9350 23.8 16.4 145 21.5 18.4 117
Grave Springs 8550 11.4 9.4 121 13.5 13.0 104
Kirwin 9550 25.7 10.6 242 29.1 14.0 208
Marquette 8760 20.4 -M * 23.7 -M *
Middle Powder 7760 13.7 11.4 120 14.1 14.3 99
Owl Creek 8975 8.5 .7 1214 15.3 8.1 189
Powder River Pass 9480 12.1 9.1 133 18.0 15.2 118
Shell Creek 9580 20.5 16.0 128 18.2 16.5 110
Timber Creek 7950 7.8 2.7 289 15.1 10.2 148
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Basin Index (%) 159 129
SHOSHONE RIVER
Blackwater 9780 42.2 25.7 164 46.4 23.7 196
Evening Star 9200 41.7 24.8 168 49.2 30.6 161
Marquette 8760 20.4 -M * 23.7 -M *
Sylvan Road 7120 .0 4.6 0 32.5 18.7 174
Younts Peak 8350 22.6 15.7 144 33.7 17.8 189
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Basin Index (%) 150 178
POWDER RIVER
Bear Trap Meadow 8200 7.0 .6 1167 14.8 10.8 137
Cloud Peak Reservoir 9860 22.0 16.4 134 26.2 16.9 155
Grave Springs 8550 11.4 9.4 121 13.5 13.0 104
Hansen Sawmill 8360 15.6 1.8 867 18.9 11.0 172
Middle Powder 7760 13.7 11.4 120 14.1 14.3 99
Powder River Pass 9480 12.1 9.1 133 18.0 15.2 118
Soldier Park 8720 18.2 -M * 20.4 -M *
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Basin Index (%) 168 130
TONGUE RIVER
Big Goose 7990 15.4 9.3 166 19.7 14.3 138
Bone Springs Div 9350 23.8 16.4 145 21.5 18.4 117
Burgess Junction 7880 13.5 11.8 114 15.8 15.0 105
Dome Lake 8880 19.8 11.3 175 21.8 16.6 131
Little Goose 8870 19.2 -M * 24.0 -M *
Sucker Creek 8880 16.5 12.0 138 18.8 17.6 107
Tie Creek 6870 4.7 2.5 188 19.7 14.6 135
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Basin Index (%) 148 122
BELLE FOURCHE
Cole Canyon 5910 1.4 .1 1400* 11.8 12.3 96
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Basin Index (%) 1400* 96
CHEYENNE RIVER BASIN
Blind Park 6890 .3 .2 150* 11.6 14.6 79
North Rapid Creek 6130 .1 .5 20* 9.9 12.6 79
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Basin Index (%) 57* 79
UPPER N. PLATTE
Arapaho Ridge 10960 26.9 22.3 121 29.8 26.4 113
Blackhall Mtn 9820 37.1 -M * 42.0 -M *
Columbine 9160 12.9 17.5 74 32.0 28.8 111
Divide Peak 8880 12.3 17.8 69 26.0 24.6 106
Joe Wright 10120 19.3 22.9 84 33.2 30.2 110
Laprele Creek 8375 6.3 5.6 112 14.9 15.2 98
Med Bow 10500 40.6 -M * 41.1 -M *
North French Creek 10130 28.9 32.8 88 34.0 31.1 109
Never Summer 10280 25.2 21.8 116 22.7 -M *
Old Battle 10000 40.5 34.7 117 42.9 39.5 109
Rawah 9020 5.9 5.2 113 20.5 17.5 117
Sage Creek Basin 7850 -M 1.0 * 18.1 16.3 111
Sand Lake 10050 33.4 31.5 106 32.1 29.3 110
South Brush Creek 8440 .4 8.4 5 15.5 18.1 86
Tower 10500 44.5 50.4 88 50.7 45.1 112
Webber Springs 9250 23.1 21.3 108 37.0 30.2 123
Willow Creek Pass 9540 19.2 14.5 132 20.5 16.0 128
Zirkel 9340 24.7 20.8 119 46.8 31.2 150
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Basin Index (%) 99 114
SWEETWATER
Deer Park 9700 36.9 15.7 235 43.4 23.6 184
Larsen Creek 9000 12.8 8.6 149 26.0 -M *
South Pass 9040 34.2 14.4 238 33.6 20.5 164
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Basin Index (%) 217 175
LOWER N. PLATTE
Casper Mtn. 7900 13.0 12.8 102 18.6 18.3 102
Laprele Creek 8375 6.3 5.6 112 14.9 15.2 98
Reno Hill 8400 13.5 12.2 111 18.4 19.2 96
Windy Peak 7900 3.9 3.4 115 14.0 13.2 106
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Basin Index (%) 108 100
LARAMIE RIVER
Brooklyn Lake 10240 21.5 23.1 93 26.4 25.0 106
Cinnabar Park 9574 14.6 19.0 77 26.9 27.3 99
Crow Creek 8330 .0 .0 * 12.3 13.6 90
Deadman Hill 10220 22.6 19.2 118 24.8 20.9 119
Rawah 9020 5.9 5.2 113 20.5 17.5 117
Roach 9700 16.8 17.1 98 25.2 22.5 112
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Basin Index (%) 97 107
S. PLATTE
Black Mountain 8920 8.3 -M * 16.4 -M *
Crow Creek 8330 .0 .0 * 12.3 13.6 90
Deadman Hill 10220 22.6 19.2 118 24.8 20.9 119
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Basin Index (%) 118* 108
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * 19.6 17.3 113
Divide Peak 8880 12.3 17.8 69 26.0 24.6 106
Elk River 8700 6.0 12.5 48 23.4 23.0 102
Little Snake River 8915 23.8 21.8 109 43.4 33.1 131
Old Battle 10000 40.5 34.7 117 42.9 39.5 109
Sage Creek Basin 7850 -M 1.0 * 18.1 16.3 111
Sandstone RS 8150 -M 5.1 * 18.8 21.0 90
Whiskey Park 8950 24.7 26.8 92 35.3 31.8 111
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Basin Index (%) 94 110
UPPER GREEN RIVER
Big Sandy Opening 9080 22.6 9.8 231 25.7 15.3 168
Blind Bull Sum 8650 48.5 22.9 212 39.0 21.5 181
East Rim Divide 7930 9.6 7.9 122 22.5 13.0 173
Elkhart Park G.S. 9400 20.7 10.8 192 26.3 15.2 173
Gros Ventre Summit 8750 20.8 11.3 184 26.5 14.7 180
Gunsight Pass 9820 26.0 12.1 215 28.2 16.2 174
Kendall R.S. 7740 13.6 3.2 425 30.6 15.6 196
Loomis Park 8240 23.7 10.5 226 34.3 19.1 180
New Fork Lake 8340 11.8 6.0 197 19.5 12.3 159
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 13.9 8.9 156 29.2 15.7 186
Spring Creek Divide 9000 44.7 24.3 184 44.6 26.4 169
Triple Peak 8500 36.4 16.7 218 44.8 28.1 159
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Basin Index (%) 202 174
LOWER GREEN RIVER
Blacks Fork Jct 8869 5.2 -M * 18.8 -M *
Buck Pasture 9632 16.7 -M * 27.3 -M *
EF Blacks Fork GS 9360 12.8 -M * 21.5 -M *
Hams Fork 7840 9.4 2.0 470 23.8 13.2 180
Hewinta 9500 7.9 4.4 180 20.9 16.4 127
Hickerson Park 9122 3.5 3.5 100 14.9 12.2 122
Hole-in-Rock 9168 4.5 2.0 225 15.6 11.6 134
Indian Creek 9425 44.6 22.5 198 45.0 25.2 179
Kelley R.S. 8180 24.2 10.8 224 33.7 20.3 166
Spirit Lk 10235 16.0 -M * 20.9 -M *
Steel Creek Park 10158 22.5 17.4 129 25.2 19.3 131
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Basin Index (%) 186 152
UPPER BEAR RIVER
Bear River RS 8777 .8 -M * 21.4 -M *
Bug Lake 7987 32.3 14.2 227 37.6 21.8 172
Burts Miller Ranch 8000 .0 -M * 11.9 -M *
Chalk Creek #1 9171 34.5 23.8 145 41.1 28.7 143
Hayden Fork 9130 14.9 8.8 169 33.5 24.0 140
Kelley R.S. 8180 24.2 10.8 224 33.7 20.3 166
Lily Lake 9133 12.8 9.9 129 23.1 19.8 117
Monte Cristo 8932 39.0 25.8 151 44.6 29.5 151
Salt River Summit 7760 17.5 7.6 230 31.9 18.5 172
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Basin Index (%) 174 151
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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.