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: APRIL 28 , 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 21.1 10.2 207 41.9 22.4 187
Black Bear 8170 51.9 37.1 140 59.7 41.2 145
Blind Bull Sum 8650 -M 23.9 * 38.7 20.9 185
Cottonwood Creek 7670 29.8 16.4 182 43.3 26.9 161
East Rim Divide 7930 11.1 8.6 129 22.4 12.6 178
Grand Targhee 9260 -M 43.8 * -M 33.9 *
Granite Creek 6770 22.4 8.8 255 38.0 20.9 182
Grassy Lake 7265 39.6 29.9 132 61.1 38.7 158
Gros Ventre Summit 8750 21.6 12.0 180 26.1 14.3 183
Gunsight Pass 9820 -M 13.2 * 27.8 15.7 177
Lewis Lake Divide 7850 48.4 30.5 159 59.3 38.0 156
Phillips Bench 8200 41.7 25.6 163 50.4 30.2 167
Salt River Summit 7760 17.6 8.2 215 -M 18.1 *
Snake River Station 6920 14.4 8.9 162 39.0 24.3 160
Spring Creek Divide 9000 44.1 24.1 183 43.6 25.8 169
Thumb Divide 7980 20.4 13.7 149 30.4 20.6 148
Togwotee Pass 9580 36.8 24.7 149 42.5 26.8 159
Two Ocean Plateau 9240 -M 29.4 * -M 29.6 *
Willow Creek 8380 29.6 24.5 121 56.9 36.9 154
Younts Peak 8350 24.5 15.2 161 33.0 17.3 191
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Basin Index (%) 159 165
MADISON-GALLATIN
Black Bear 8170 51.9 37.1 140 59.7 41.2 145
Canyon 7870 18.8 11.3 166 28.6 17.7 162
Madison Plateau 7750 29.8 22.1 135 39.9 28.4 140
West Yellowstone 6700 .8 3.7 22 26.1 15.6 167
Whiskey Creek 6800 12.8 15.2 84 29.6 22.0 135
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Basin Index (%) 128 147
YELLOWSTONE
Beartooth Lake 9360 35.8 23.2 154 30.6 21.6 142
Burnt Mtn 5880 .0 .0 * 17.2 15.2 113
Canyon 7870 18.8 11.3 166 28.6 17.7 162
Cole Creek 7850 15.1 16.3 93 12.3 15.8 78
Evening Star 9200 41.1 24.8 166 48.3 29.9 162
Fisher Creek 9100 47.3 33.1 143 51.5 34.6 149
Northeast Entrance 7350 3.5 4.4 80 22.7 13.5 168
Parker Peak 9400 42.3 21.7 195 39.3 19.6 201
Sylvan Lake 8420 27.0 20.3 133 41.8 24.6 170
Thumb Divide 7980 20.4 13.7 149 30.4 20.6 148
Two Ocean Plateau 9240 -M 29.4 * -M 29.6 *
White Mill 8700 40.5 23.8 170 39.2 25.8 152
Wolverine 7650 3.3 4.2 79 23.5 13.5 174
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Basin Index (%) 150 153
WIND RIVER
Burroughs Creek 8750 20.4 -M * 28.6 -M *
Castle Creek 8400 7.9 -M * 17.3 -M *
Cold Springs 9630 15.2 2.0 760 21.0 12.0 175
Deer Park 9700 35.5 16.3 218 41.8 23.0 182
Hobbs Park 10100 32.9 15.8 208 31.8 16.3 195
Kirwin 9550 25.1 10.3 244 27.7 13.4 207
Little Warm 9370 19.2 9.1 211 26.5 14.8 179
Owl Creek 8975 8.4 1.7 494 14.6 7.6 192
South Pass 9040 32.6 15.1 216 31.4 20.0 157
St. Lawrence Alt 8620 7.9 3.8 208 19.3 11.2 172
Togwotee Pass 9580 36.8 24.7 149 42.5 26.8 159
Townsend Creek 8700 18.1 8.2 221 25.5 14.6 175
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Basin Index (%) 217 177
BIGHORN BASIN
Bald Mtn. 9380 23.1 20.5 113 20.1 19.2 105
Bear Trap Meadow 8200 6.8 1.5 453 14.0 10.2 137
Bone Springs Div 9350 23.1 16.5 140 20.6 17.7 116
Grave Springs 8550 10.9 9.2 118 12.7 12.4 102
Kirwin 9550 25.1 10.3 244 27.7 13.4 207
Marquette 8760 18.6 -M * 22.2 -M *
Middle Powder 7760 12.7 12.1 105 13.2 13.8 96
Owl Creek 8975 8.4 1.7 494 14.6 7.6 192
Powder River Pass 9480 11.5 9.8 117 17.2 14.6 118
Shell Creek 9580 19.9 16.0 124 17.4 15.8 110
Timber Creek 7950 7.3 3.5 209 14.1 9.5 148
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Basin Index (%) 147 128
SHOSHONE RIVER
Blackwater 9780 41.6 24.9 167 45.6 22.9 199
Evening Star 9200 41.1 24.8 166 48.3 29.9 162
Marquette 8760 18.6 -M * 22.2 -M *
Sylvan Road 7120 .0 7.1 0 32.5 18.2 179
Younts Peak 8350 24.5 15.2 161 33.0 17.3 191
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Basin Index (%) 149 181
POWDER RIVER
Bear Trap Meadow 8200 6.8 1.5 453 14.0 10.2 137
Cloud Peak Reservoir 9860 20.8 16.5 126 24.7 16.1 153
Grave Springs 8550 10.9 9.2 118 12.7 12.4 102
Hansen Sawmill 8360 15.0 3.6 417 19.2 10.5 183
Middle Powder 7760 12.7 12.1 105 13.2 13.8 96
Powder River Pass 9480 11.5 9.8 117 17.2 14.6 118
Soldier Park 8720 17.5 -M * 19.4 -M *
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Basin Index (%) 147 130
TONGUE RIVER
Big Goose 7990 14.1 9.1 155 18.2 13.6 134
Bone Springs Div 9350 23.1 16.5 140 20.6 17.7 116
Burgess Junction 7880 12.7 12.2 104 14.8 14.4 103
Dome Lake 8880 18.5 11.7 158 20.5 16.0 128
Little Goose 8870 17.8 -M * 22.6 -M *
Sucker Creek 8880 15.3 12.5 122 17.1 16.9 101
Tie Creek 6870 3.3 2.8 118 18.2 13.8 132
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Basin Index (%) 134 118
BELLE FOURCHE
Cole Canyon 5910 1.5 .3 500* 11.2 11.4 98
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Basin Index (%) 500* 98
CHEYENNE RIVER BASIN
Blind Park 6890 .1 2.3 4 10.8 13.9 78
North Rapid Creek 6130 .0 2.3 0 9.6 11.9 81
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Basin Index (%) 2 79
UPPER N. PLATTE
Arapaho Ridge 10960 25.8 22.3 116 28.9 25.8 112
Blackhall Mtn 9820 36.7 -M * 41.4 -M *
Columbine 9160 12.3 19.5 63 30.7 28.1 109
Divide Peak 8880 11.5 18.0 64 25.1 23.9 105
Joe Wright 10120 18.5 23.5 79 32.3 29.3 110
Laprele Creek 8375 6.3 6.9 91 14.2 14.7 97
Med Bow 10500 38.7 -M * 39.4 -M *
North French Creek 10130 26.9 33.0 82 31.9 30.2 106
Never Summer 10280 24.7 21.5 115 22.2 -M *
Old Battle 10000 39.5 34.6 114 41.8 38.6 108
Rawah 9020 5.8 7.4 78 20.0 17.0 118
Sage Creek Basin 7850 -M 1.4 * 17.8 15.9 112
Sand Lake 10050 32.1 31.2 103 30.7 28.5 108
South Brush Creek 8440 .3 9.9 3 14.7 17.5 84
Tower 10500 44.0 49.8 88 48.6 44.1 110
Webber Springs 9250 22.8 22.0 104 36.3 29.5 123
Willow Creek Pass 9540 18.9 13.8 137 20.2 15.4 131
Zirkel 9340 24.4 21.6 113 45.9 30.5 150
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Basin Index (%) 94 113
SWEETWATER
Deer Park 9700 35.5 16.3 218 41.8 23.0 182
Larsen Creek 9000 13.4 9.5 141 25.7 -M *
South Pass 9040 32.6 15.1 216 31.4 20.0 157
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Basin Index (%) 199 170
LOWER N. PLATTE
Casper Mtn. 7900 12.2 14.1 87 17.5 17.6 99
Laprele Creek 8375 6.3 6.9 91 14.2 14.7 97
Reno Hill 8400 12.9 13.4 96 17.6 18.4 96
Windy Peak 7900 3.8 5.1 75 13.2 12.7 104
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Basin Index (%) 89 99
LARAMIE RIVER
Brooklyn Lake 10240 20.5 23.1 89 25.1 24.2 104
Cinnabar Park 9574 13.5 20.0 68 25.2 26.6 95
Crow Creek 8330 .2 .0 * 11.7 13.1 89
Deadman Hill 10220 21.2 18.6 114 23.5 20.2 116
Rawah 9020 5.8 7.4 78 20.0 17.0 118
Roach 9700 15.6 17.1 91 23.9 21.9 109
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Basin Index (%) 89 105
S. PLATTE
Black Mountain 8920 7.9 -M * 15.3 -M *
Crow Creek 8330 .2 .0 * 11.7 13.1 89
Deadman Hill 10220 21.2 18.6 114 23.5 20.2 116
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Basin Index (%) 115* 106
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .6 0* 19.3 16.9 114
Divide Peak 8880 11.5 18.0 64 25.1 23.9 105
Elk River 8700 5.8 14.1 41 23.0 22.3 103
Little Snake River 8915 23.3 22.9 102 42.7 32.1 133
Old Battle 10000 39.5 34.6 114 41.8 38.6 108
Sage Creek Basin 7850 -M 1.4 * 17.8 15.9 112
Sandstone RS 8150 .0 7.2 0 18.2 20.4 89
Whiskey Park 8950 24.4 25.9 94 34.5 30.9 112
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Basin Index (%) 85 111
UPPER GREEN RIVER
Big Sandy Opening 9080 23.1 11.6 199 25.5 14.9 171
Blind Bull Sum 8650 -M 23.9 * 38.7 20.9 185
East Rim Divide 7930 11.1 8.6 129 22.4 12.6 178
Elkhart Park G.S. 9400 20.9 11.7 179 26.2 14.7 178
Gros Ventre Summit 8750 21.6 12.0 180 26.1 14.3 183
Gunsight Pass 9820 -M 13.2 * 27.8 15.7 177
Kendall R.S. 7740 15.5 5.6 277 30.6 15.2 201
Loomis Park 8240 24.7 11.4 217 34.2 18.6 184
New Fork Lake 8340 13.0 6.9 188 19.2 11.8 163
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 16.1 9.9 163 28.8 15.3 188
Spring Creek Divide 9000 44.1 24.1 183 43.6 25.8 169
Triple Peak 8500 36.7 18.5 198 44.2 27.4 161
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Basin Index (%) 189 177
LOWER GREEN RIVER
Blacks Fork Jct 8869 5.1 -M * 18.3 -M *
Buck Pasture 9632 16.5 -M * 26.8 -M *
EF Blacks Fork GS 9360 12.4 -M * 20.6 -M *
Hams Fork 7840 9.8 4.1 239 23.4 12.8 183
Hewinta 9500 6.9 5.7 121 20.2 15.8 128
Hickerson Park 9122 4.0 4.9 82 14.2 11.8 120
Hole-in-Rock 9168 4.7 3.8 124 15.0 11.2 134
Indian Creek 9425 43.4 23.7 183 44.2 24.6 180
Kelley R.S. 8180 24.3 11.8 206 33.3 19.8 168
Spirit Lk 10235 15.2 -M * 20.2 -M *
Steel Creek Park 10158 21.7 16.8 129 24.3 18.7 130
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Basin Index (%) 162 152
UPPER BEAR RIVER
Bear River RS 8777 1.7 -M * 21.1 -M *
Bug Lake 7987 32.6 15.9 205 36.6 21.3 172
Burts Miller Ranch 8000 .1 -M * 11.6 -M *
Chalk Creek #1 9171 33.9 24.6 138 40.4 27.9 145
Hayden Fork 9130 15.1 9.9 153 33.3 23.3 143
Kelley R.S. 8180 24.3 11.8 206 33.3 19.8 168
Lily Lake 9133 12.5 9.8 128 22.6 19.2 118
Monte Cristo 8932 38.0 27.2 140 43.7 28.7 152
Salt River Summit 7760 17.6 8.2 215 -M 18.1 *
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Basin Index (%) 162 150
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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.