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 30 , 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 21.2 9.7 219 42.1 22.6 186
Black Bear 8170 51.6 37.4 138 59.7 41.6 144
Blind Bull Sum 8650 -M 23.4 * 38.7 21.2 183
Cottonwood Creek 7670 29.9 15.7 190 43.6 27.3 160
East Rim Divide 7930 11.1 8.3 134 22.4 12.9 174
Grand Targhee 9260 57.8 44.4 130 50.9 34.4 148
Granite Creek 6770 22.3 8.5 262 38.2 21.3 179
Grassy Lake 7265 39.6 29.4 135 61.1 39.1 156
Gros Ventre Summit 8750 -M 11.7 * -M 14.5 *
Gunsight Pass 9820 -M 12.8 * 28.1 16.0 176
Lewis Lake Divide 7850 48.6 30.3 160 59.5 38.4 155
Phillips Bench 8200 41.7 25.6 163 50.5 30.5 166
Salt River Summit 7760 18.2 8.0 228 -M 18.3 *
Snake River Station 6920 14.4 7.9 182 39.0 24.6 159
Spring Creek Divide 9000 44.5 24.3 183 43.9 26.1 168
Thumb Divide 7980 20.6 12.9 160 30.4 20.8 146
Togwotee Pass 9580 36.9 24.7 149 42.8 27.1 158
Two Ocean Plateau 9240 -M 29.7 * -M 29.9 *
Willow Creek 8380 29.3 23.5 125 57.2 37.4 153
Younts Peak 8350 23.8 15.4 155 33.3 17.5 190
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Basin Index (%) 157 162
MADISON-GALLATIN
Black Bear 8170 51.6 37.4 138 59.7 41.6 144
Canyon 7870 18.8 10.8 174 28.7 17.9 160
Madison Plateau 7750 29.8 21.6 138 40.0 28.8 139
West Yellowstone 6700 .3 2.5 12 26.0 15.9 164
Whiskey Creek 6800 12.8 14.9 86 29.7 22.2 134
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Basin Index (%) 130 146
YELLOWSTONE
Beartooth Lake 9360 35.9 22.9 157 30.9 21.8 142
Burnt Mtn 5880 .9 .0 * 18.4 15.5 119
Canyon 7870 18.8 10.8 174 28.7 17.9 160
Cole Creek 7850 17.2 16.4 105 14.1 16.2 87
Evening Star 9200 41.5 24.9 167 48.7 30.2 161
Fisher Creek 9100 47.4 32.8 145 51.8 34.9 148
Northeast Entrance 7350 3.1 3.5 89 22.7 13.7 166
Parker Peak 9400 42.3 21.4 198 39.5 19.9 198
Sylvan Lake 8420 27.1 20.1 135 41.8 24.9 168
Thumb Divide 7980 20.6 12.9 160 30.4 20.8 146
Two Ocean Plateau 9240 -M 29.7 * -M 29.9 *
White Mill 8700 40.4 23.8 170 39.4 26.1 151
Wolverine 7650 3.0 3.1 97 23.4 13.7 171
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Basin Index (%) 155 153
WIND RIVER
Burroughs Creek 8750 20.6 -M * 29.0 -M *
Castle Creek 8400 8.2 -M * 17.2 -M *
Cold Springs 9630 16.2 1.4 1157 22.2 12.4 179
Deer Park 9700 37.2 16.1 231 42.6 23.2 184
Hobbs Park 10100 35.1 16.0 219 31.9 16.5 193
Kirwin 9550 26.0 10.4 250 29.0 13.6 213
Little Warm 9370 19.3 8.8 219 26.8 15.3 175
Owl Creek 8975 9.1 1.2 758 15.2 7.8 195
South Pass 9040 34.5 15.0 230 33.5 20.2 166
St. Lawrence Alt 8620 9.7 3.0 323 20.5 11.4 180
Togwotee Pass 9580 36.9 24.7 149 42.8 27.1 158
Townsend Creek 8700 20.0 7.8 256 27.9 14.8 189
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Basin Index (%) 234 180
BIGHORN BASIN
Bald Mtn. 9380 24.1 20.5 118 20.7 19.5 106
Bear Trap Meadow 8200 7.2 1.1 655 14.7 10.4 141
Bone Springs Div 9350 23.3 16.6 140 20.9 18.0 116
Grave Springs 8550 11.2 9.4 119 13.3 12.6 106
Kirwin 9550 26.0 10.4 250 29.0 13.6 213
Marquette 8760 -M -M * 23.6 -M *
Middle Powder 7760 13.1 11.8 111 13.7 14.0 98
Owl Creek 8975 9.1 1.2 758 15.2 7.8 195
Powder River Pass 9480 11.9 9.6 124 17.8 14.9 119
Shell Creek 9580 20.3 16.0 127 17.8 16.1 111
Timber Creek 7950 8.4 3.2 262 15.1 9.8 154
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Basin Index (%) 155 130
SHOSHONE RIVER
Blackwater 9780 41.9 25.2 166 46.1 23.3 198
Evening Star 9200 41.5 24.9 167 48.7 30.2 161
Marquette 8760 -M -M * 23.6 -M *
Sylvan Road 7120 .0 6.3 0 32.5 18.5 176
Younts Peak 8350 23.8 15.4 155 33.3 17.5 190
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Basin Index (%) 149 179
POWDER RIVER
Bear Trap Meadow 8200 7.2 1.1 655 14.7 10.4 141
Cloud Peak Reservoir 9860 21.7 16.5 132 25.9 16.4 158
Grave Springs 8550 11.2 9.4 119 13.3 12.6 106
Hansen Sawmill 8360 15.9 2.9 548 18.9 10.7 177
Middle Powder 7760 13.1 11.8 111 13.7 14.0 98
Powder River Pass 9480 11.9 9.6 124 17.8 14.9 119
Soldier Park 8720 18.2 -M * 20.2 -M *
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Basin Index (%) 158 132
TONGUE RIVER
Big Goose 7990 15.0 9.2 163 19.5 13.8 141
Bone Springs Div 9350 23.3 16.6 140 20.9 18.0 116
Burgess Junction 7880 13.2 12.1 109 15.7 14.6 108
Dome Lake 8880 19.5 11.5 170 21.5 16.2 133
Little Goose 8870 18.9 -M * 23.6 -M *
Sucker Creek 8880 16.2 12.3 132 18.4 17.1 108
Tie Creek 6870 4.4 2.7 163 19.2 14.1 136
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Basin Index (%) 142 123
BELLE FOURCHE
Cole Canyon 5910 1.6 .3 533* 11.7 11.5 102
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Basin Index (%) 533* 102
CHEYENNE RIVER BASIN
Blind Park 6890 .0 1.3 0 10.8 14.1 77
North Rapid Creek 6130 .0 1.3 0 9.6 12.0 80
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Basin Index (%) 0 78
UPPER N. PLATTE
Arapaho Ridge 10960 26.4 22.3 118 29.4 26.0 113
Blackhall Mtn 9820 36.8 -M * 41.6 -M *
Columbine 9160 12.5 18.6 67 30.8 28.4 108
Divide Peak 8880 12.2 18.0 68 25.7 24.1 107
Joe Wright 10120 18.7 23.4 80 32.6 29.6 110
Laprele Creek 8375 7.0 6.4 109 14.6 14.9 98
Med Bow 10500 39.4 -M * 40.0 -M *
North French Creek 10130 27.7 32.9 84 32.7 30.5 107
Never Summer 10280 24.8 21.7 114 22.3 -M *
Old Battle 10000 40.0 34.7 115 42.4 39.0 109
Rawah 9020 5.8 6.5 89 19.9 17.1 116
Sage Creek Basin 7850 -M 1.1 * 17.9 16.1 111
Sand Lake 10050 32.2 31.3 103 31.2 28.9 108
South Brush Creek 8440 .4 9.6 4 14.9 17.7 84
Tower 10500 44.1 49.9 88 49.6 44.5 111
Webber Springs 9250 23.1 21.9 105 36.7 29.8 123
Willow Creek Pass 9540 19.2 14.1 136 20.4 15.6 131
Zirkel 9340 24.6 21.2 116 46.1 30.8 150
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Basin Index (%) 96 113
SWEETWATER
Deer Park 9700 37.2 16.1 231 42.6 23.2 184
Larsen Creek 9000 13.7 9.3 147 25.8 -M *
South Pass 9040 34.5 15.0 230 33.5 20.2 166
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Basin Index (%) 211 175
LOWER N. PLATTE
Casper Mtn. 7900 12.9 13.7 94 18.3 17.8 103
Laprele Creek 8375 7.0 6.4 109 14.6 14.9 98
Reno Hill 8400 13.0 12.8 102 17.8 18.7 95
Windy Peak 7900 4.4 4.4 100 13.7 12.9 106
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Basin Index (%) 100 100
LARAMIE RIVER
Brooklyn Lake 10240 20.8 23.3 89 25.7 24.5 105
Cinnabar Park 9574 14.2 19.7 72 26.1 26.8 97
Crow Creek 8330 .3 .0 * 11.9 13.3 89
Deadman Hill 10220 22.2 18.9 117 24.4 20.5 119
Rawah 9020 5.8 6.5 89 19.9 17.1 116
Roach 9700 16.4 17.2 95 24.6 22.2 111
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Basin Index (%) 93 107
S. PLATTE
Black Mountain 8920 8.7 -M * 16.1 -M *
Crow Creek 8330 .3 .0 * 11.9 13.3 89
Deadman Hill 10220 22.2 18.9 117 24.4 20.5 119
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Basin Index (%) 119* 107
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * 19.3 17.0 114
Divide Peak 8880 12.2 18.0 68 25.7 24.1 107
Elk River 8700 6.2 13.6 46 23.2 22.5 103
Little Snake River 8915 23.5 22.5 104 42.7 32.5 131
Old Battle 10000 40.0 34.7 115 42.4 39.0 109
Sage Creek Basin 7850 -M 1.1 * 17.9 16.1 111
Sandstone RS 8150 .0 6.3 0 18.4 20.6 89
Whiskey Park 8950 24.5 26.3 93 34.7 31.3 111
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Basin Index (%) 88 110
UPPER GREEN RIVER
Big Sandy Opening 9080 23.1 10.9 212 25.6 15.1 170
Blind Bull Sum 8650 -M 23.4 * 38.7 21.2 183
East Rim Divide 7930 11.1 8.3 134 22.4 12.9 174
Elkhart Park G.S. 9400 20.9 11.5 182 26.2 14.9 176
Gros Ventre Summit 8750 -M 11.7 * -M 14.5 *
Gunsight Pass 9820 -M 12.8 * 28.1 16.0 176
Kendall R.S. 7740 15.7 4.8 327 30.6 15.4 199
Loomis Park 8240 25.0 11.2 223 34.3 18.8 182
New Fork Lake 8340 13.3 6.6 202 19.3 12.0 161
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 15.7 9.5 165 29.0 15.5 187
Spring Creek Divide 9000 44.5 24.3 183 43.9 26.1 168
Triple Peak 8500 36.8 17.9 206 44.3 27.8 159
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Basin Index (%) 196 175
LOWER GREEN RIVER
Blacks Fork Jct 8869 5.8 -M * 18.7 -M *
Buck Pasture 9632 17.1 -M * 27.3 -M *
EF Blacks Fork GS 9360 13.0 -M * 21.4 -M *
Hams Fork 7840 10.4 3.3 315 23.7 13.0 182
Hewinta 9500 8.1 5.0 162 20.7 16.0 129
Hickerson Park 9122 4.8 4.5 107 14.7 11.9 124
Hole-in-Rock 9168 5.4 2.9 186 15.5 11.4 136
Indian Creek 9425 44.1 23.3 189 44.9 24.9 180
Kelley R.S. 8180 24.4 11.7 209 33.6 20.1 167
Spirit Lk 10235 15.6 -M * 20.9 -M *
Steel Creek Park 10158 22.6 17.0 133 25.2 18.9 133
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Basin Index (%) 177 153
UPPER BEAR RIVER
Bear River RS 8777 2.0 -M * 21.3 -M *
Bug Lake 7987 33.7 15.4 219 37.5 21.6 174
Burts Miller Ranch 8000 .0 -M * 11.8 -M *
Chalk Creek #1 9171 34.5 24.4 141 41.0 28.2 145
Hayden Fork 9130 15.5 9.5 163 33.5 23.6 142
Kelley R.S. 8180 24.4 11.7 209 33.6 20.1 167
Lily Lake 9133 13.0 9.9 131 23.0 19.4 119
Monte Cristo 8932 38.6 26.9 143 44.4 29.1 153
Salt River Summit 7760 18.2 8.0 228 -M 18.3 *
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Basin Index (%) 168 150
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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.