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 SUNDAY: APRIL 23 , 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 20.9 11.3 185 40.7 22.0 185
Black Bear 8170 48.4 36.8 132 56.4 40.3 140
Blind Bull Sum 8650 45.2 24.3 186 37.4 20.5 182
Cottonwood Creek 7670 27.0 17.8 152 40.6 26.2 155
East Rim Divide 7930 10.8 9.3 116 21.6 12.3 176
Grand Targhee 9260 52.0 42.7 122 46.1 33.0 140
Granite Creek 6770 21.9 10.0 219 36.9 20.5 180
Grassy Lake 7265 37.5 30.6 123 57.8 37.8 153
Gros Ventre Summit 8750 -M 12.9 * -M 13.9 *
Gunsight Pass 9820 24.4 13.6 179 26.3 15.2 173
Lewis Lake Divide 7850 46.7 30.7 152 57.5 37.2 155
Phillips Bench 8200 39.2 25.3 155 48.2 29.5 163
Salt River Summit 7760 17.2 8.9 193 30.2 17.6 172
Snake River Station 6920 14.5 10.9 133 37.3 23.8 157
Spring Creek Divide 9000 42.3 23.6 179 41.9 25.2 166
Thumb Divide 7980 20.2 14.3 141 29.2 20.0 146
Togwotee Pass 9580 35.1 24.3 144 40.7 26.0 157
Two Ocean Plateau 9240 -M 28.7 * -M 28.9 *
Willow Creek 8380 27.9 26.4 106 53.1 35.8 148
Younts Peak 8350 24.0 15.1 159 32.4 16.9 192
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Basin Index (%) 148 160
MADISON-GALLATIN
Black Bear 8170 48.4 36.8 132 56.4 40.3 140
Canyon 7870 17.2 12.0 143 26.7 17.2 155
Madison Plateau 7750 28.1 22.8 123 38.0 27.8 137
West Yellowstone 6700 .4 6.0 7 24.1 15.3 158
Whiskey Creek 6800 12.1 15.4 79 28.0 21.5 130
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Basin Index (%) 114 142
YELLOWSTONE
Beartooth Lake 9360 34.6 23.6 147 29.7 21.0 141
Burnt Mtn 5880 .1 .0 * 15.5 14.5 107
Canyon 7870 17.2 12.0 143 26.7 17.2 155
Cole Creek 7850 12.4 16.4 76 10.1 14.9 68
Evening Star 9200 40.1 24.4 164 47.1 29.1 162
Fisher Creek 9100 45.6 33.0 138 50.1 33.8 148
Northeast Entrance 7350 3.2 5.7 56 21.6 13.1 165
Parker Peak 9400 39.5 21.4 185 37.2 19.1 195
Sylvan Lake 8420 25.3 20.3 125 39.7 24.0 165
Thumb Divide 7980 20.2 14.3 141 29.2 20.0 146
Two Ocean Plateau 9240 -M 28.7 * -M 28.9 *
White Mill 8700 39.0 23.7 165 38.1 25.2 151
Wolverine 7650 3.2 6.2 52 22.2 13.1 169
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Basin Index (%) 140 150
WIND RIVER
Burroughs Creek 8750 20.5 -M * 28.2 -M *
Castle Creek 8400 8.1 -M * 16.8 -M *
Cold Springs 9630 15.7 3.9 403 20.8 11.3 184
Deer Park 9700 34.4 16.4 210 40.6 22.1 184
Hobbs Park 10100 31.7 15.3 207 31.2 15.3 204
Kirwin 9550 24.1 10.1 239 27.3 12.8 213
Little Warm 9370 18.7 9.9 189 25.8 14.2 182
Owl Creek 8975 8.7 3.2 272 14.3 7.1 201
South Pass 9040 31.9 15.3 208 30.6 19.0 161
St. Lawrence Alt 8620 8.2 5.1 161 18.6 10.3 181
Togwotee Pass 9580 35.1 24.3 144 40.7 26.0 157
Townsend Creek 8700 17.7 9.0 197 25.0 13.7 182
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Basin Index (%) 201 181
BIGHORN BASIN
Bald Mtn. 9380 21.5 20.1 107 18.8 18.5 102
Bear Trap Meadow 8200 5.1 2.5 204 11.8 9.7 122
Bone Springs Div 9350 21.4 16.3 131 19.4 17.1 113
Grave Springs 8550 8.5 9.4 90 10.4 11.9 87
Kirwin 9550 24.1 10.1 239 27.3 12.8 213
Marquette 8760 15.6 -M * 19.7 -M *
Middle Powder 7760 10.4 12.4 84 10.1 13.1 77
Owl Creek 8975 8.7 3.2 272 14.3 7.1 201
Powder River Pass 9480 10.2 10.2 100 15.7 14.0 112
Shell Creek 9580 19.4 15.7 124 16.8 15.1 111
Timber Creek 7950 7.0 4.2 167 13.0 8.8 148
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Basin Index (%) 131 123
SHOSHONE RIVER
Blackwater 9780 40.0 24.1 166 44.3 22.2 200
Evening Star 9200 40.1 24.4 164 47.1 29.1 162
Marquette 8760 15.6 -M * 19.7 -M *
Sylvan Road 7120 .0 8.9 0 31.6 17.8 178
Younts Peak 8350 24.0 15.1 159 32.4 16.9 192
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Basin Index (%) 144 181
POWDER RIVER
Bear Trap Meadow 8200 5.1 2.5 204 11.8 9.7 122
Cloud Peak Reservoir 9860 18.7 16.1 116 22.5 15.3 147
Grave Springs 8550 8.5 9.4 90 10.4 11.9 87
Hansen Sawmill 8360 12.4 4.5 276 17.5 9.9 177
Middle Powder 7760 10.4 12.4 84 10.1 13.1 77
Powder River Pass 9480 10.2 10.2 100 15.7 14.0 112
Soldier Park 8720 15.7 -M * 17.2 -M *
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Basin Index (%) 119 119
TONGUE RIVER
Big Goose 7990 12.2 9.2 133 16.1 13.1 123
Bone Springs Div 9350 21.4 16.3 131 19.4 17.1 113
Burgess Junction 7880 11.2 12.6 89 13.1 13.7 96
Dome Lake 8880 16.9 11.8 143 18.5 15.2 122
Little Goose 8870 15.1 -M * 19.8 -M *
Sucker Creek 8880 13.7 12.7 108 15.5 16.1 96
Tie Creek 6870 .1 3.9 3 14.8 13.3 111
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Basin Index (%) 114 110
BELLE FOURCHE
Cole Canyon 5910 .0 1.4 0 8.8 10.7 82
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Basin Index (%) 0 82
CHEYENNE RIVER BASIN
Blind Park 6890 .0 3.9 0 10.4 13.4 78
North Rapid Creek 6130 .0 3.9 0 8.8 11.4 77
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Basin Index (%) 0 77
UPPER N. PLATTE
Arapaho Ridge 10960 24.8 21.5 115 27.5 24.7 111
Blackhall Mtn 9820 34.6 -M * 39.0 -M *
Columbine 9160 11.1 20.7 54 28.6 27.3 105
Divide Peak 8880 11.1 18.3 61 23.7 23.2 102
Joe Wright 10120 17.1 22.7 75 30.5 28.3 108
Laprele Creek 8375 6.7 7.4 91 13.6 14.0 97
Med Bow 10500 36.3 -M * 36.9 -M *
North French Creek 10130 24.6 32.2 76 29.5 29.1 101
Never Summer 10280 23.3 20.9 111 21.0 -M *
Old Battle 10000 36.9 33.5 110 39.5 37.5 105
Rawah 9020 5.2 8.1 64 18.8 15.8 119
Sage Creek Basin 7850 -M 4.2 * 17.0 15.4 110
Sand Lake 10050 30.7 30.7 100 29.3 27.3 107
South Brush Creek 8440 .3 9.8 3 13.5 16.7 81
Tower 10500 40.1 48.8 82 45.8 42.9 107
Webber Springs 9250 22.5 21.8 103 34.2 28.8 119
Willow Creek Pass 9540 18.3 13.5 136 19.3 14.7 131
Zirkel 9340 23.3 22.5 104 43.5 30.0 145
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Basin Index (%) 89 110
SWEETWATER
Deer Park 9700 34.4 16.4 210 40.6 22.1 184
Larsen Creek 9000 12.9 10.0 129 24.8 -M *
South Pass 9040 31.9 15.3 208 30.6 19.0 161
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Basin Index (%) 190 173
LOWER N. PLATTE
Casper Mtn. 7900 10.0 14.2 70 14.8 16.9 88
Laprele Creek 8375 6.7 7.4 91 13.6 14.0 97
Reno Hill 8400 12.1 14.0 86 16.3 17.5 93
Windy Peak 7900 4.4 6.3 70 12.8 12.0 107
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Basin Index (%) 79 95
LARAMIE RIVER
Brooklyn Lake 10240 20.5 22.5 91 24.2 23.3 104
Cinnabar Park 9574 12.7 19.9 64 23.4 25.8 91
Crow Creek 8330 1.1 .2 550* 11.0 12.2 90
Deadman Hill 10220 20.5 17.7 116 22.3 19.4 115
Rawah 9020 5.2 8.1 64 18.8 15.8 119
Roach 9700 14.9 16.7 89 22.3 21.0 106
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Basin Index (%) 88 104
S. PLATTE
Black Mountain 8920 8.1 -M * 14.5 -M *
Crow Creek 8330 1.1 .2 550* 11.0 12.2 90
Deadman Hill 10220 20.5 17.7 116 22.3 19.4 115
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Basin Index (%) 121* 105
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 2.9 0 17.7 16.3 109
Divide Peak 8880 11.1 18.3 61 23.7 23.2 102
Elk River 8700 5.6 14.8 38 21.1 21.7 97
Little Snake River 8915 21.7 23.6 92 40.1 31.3 128
Old Battle 10000 36.9 33.5 110 39.5 37.5 105
Sage Creek Basin 7850 -M 4.2 * 17.0 15.4 110
Sandstone RS 8150 -M 9.6 * 16.6 19.8 84
Whiskey Park 8950 22.1 25.6 86 31.7 30.1 105
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Basin Index (%) 82 106
UPPER GREEN RIVER
Big Sandy Opening 9080 21.9 12.3 178 24.7 14.4 172
Blind Bull Sum 8650 45.2 24.3 186 37.4 20.5 182
East Rim Divide 7930 10.8 9.3 116 21.6 12.3 176
Elkhart Park G.S. 9400 19.9 11.8 169 25.2 14.3 176
Gros Ventre Summit 8750 -M 12.9 * -M 13.9 *
Gunsight Pass 9820 24.4 13.6 179 26.3 15.2 173
Kendall R.S. 7740 15.8 7.3 216 29.8 14.9 200
Loomis Park 8240 24.4 12.3 198 33.1 18.2 182
New Fork Lake 8340 12.5 8.1 154 18.8 11.5 163
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 15.8 10.4 152 28.2 15.0 188
Spring Creek Divide 9000 42.3 23.6 179 41.9 25.2 166
Triple Peak 8500 35.3 19.2 184 42.5 26.7 159
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Basin Index (%) 176 175
LOWER GREEN RIVER
Blacks Fork Jct 8869 5.2 -M * 17.3 -M *
Buck Pasture 9632 15.7 -M * 24.9 -M *
EF Blacks Fork GS 9360 11.8 -M * 19.0 -M *
Hams Fork 7840 10.3 5.7 181 22.7 12.3 185
Hewinta 9500 6.9 7.4 93 19.0 15.3 124
Hickerson Park 9122 4.7 5.1 92 13.7 11.3 121
Hole-in-Rock 9168 5.5 5.5 100 14.6 10.8 135
Indian Creek 9425 41.7 23.5 177 42.8 24.0 178
Kelley R.S. 8180 23.6 12.0 197 31.9 19.3 165
Spirit Lk 10235 15.1 -M * 19.6 -M *
Steel Creek Park 10158 20.3 16.4 124 22.9 18.1 127
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Basin Index (%) 149 151
UPPER BEAR RIVER
Bear River RS 8777 1.7 -M * 19.9 -M *
Bug Lake 7987 31.9 16.4 195 35.7 20.7 172
Burts Miller Ranch 8000 .0 -M * 11.2 -M *
Chalk Creek #1 9171 32.2 24.5 131 38.4 27.2 141
Hayden Fork 9130 14.8 11.0 135 31.5 22.7 139
Kelley R.S. 8180 23.6 12.0 197 31.9 19.3 165
Lily Lake 9133 11.6 10.1 115 21.4 18.6 115
Monte Cristo 8932 36.2 27.3 133 41.8 27.9 150
Salt River Summit 7760 17.2 8.9 193 30.2 17.6 172
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Basin Index (%) 152 150
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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.