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: APRIL 26 , 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 20.6 10.6 194 41.4 22.2 186
Black Bear 8170 50.1 37.0 135 58.0 40.9 142
Blind Bull Sum 8650 45.8 24.2 189 38.0 20.8 183
Cottonwood Creek 7670 28.2 17.0 166 41.7 26.6 157
East Rim Divide 7930 10.6 8.9 119 22.1 12.5 177
Grand Targhee 9260 54.8 43.3 127 48.2 33.5 144
Granite Creek 6770 21.8 9.3 234 37.4 20.7 181
Grassy Lake 7265 37.6 30.1 125 58.9 38.4 153
Gros Ventre Summit 8750 20.9 12.3 170 25.5 14.1 181
Gunsight Pass 9820 -M 13.4 * 27.0 15.5 174
Lewis Lake Divide 7850 47.1 30.7 153 58.3 37.7 155
Phillips Bench 8200 40.2 25.5 158 49.2 29.9 165
Salt River Summit 7760 17.2 8.4 205 -M 17.9 *
Snake River Station 6920 13.6 9.8 139 38.1 24.2 157
Spring Creek Divide 9000 43.0 23.9 180 42.7 25.5 167
Thumb Divide 7980 19.5 14.1 138 29.5 20.3 145
Togwotee Pass 9580 35.5 24.5 145 41.4 26.5 156
Two Ocean Plateau 9240 -M 29.2 * -M 29.3 *
Willow Creek 8380 28.4 25.3 112 55.0 36.5 151
Younts Peak 8350 24.2 15.1 160 32.8 17.1 192
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Basin Index (%) 151 161
MADISON-GALLATIN
Black Bear 8170 50.1 37.0 135 58.0 40.9 142
Canyon 7870 18.1 11.6 156 27.8 17.5 159
Madison Plateau 7750 29.2 22.4 130 39.3 28.2 139
West Yellowstone 6700 .7 4.7 15 25.6 15.5 165
Whiskey Creek 6800 12.6 15.4 82 29.1 21.8 133
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Basin Index (%) 122 145
YELLOWSTONE
Beartooth Lake 9360 35.2 23.5 150 30.2 21.3 142
Burnt Mtn 5880 .0 .0 * 16.5 14.9 111
Canyon 7870 18.1 11.6 156 27.8 17.5 159
Cole Creek 7850 13.7 16.3 84 11.1 15.5 72
Evening Star 9200 40.3 24.6 164 47.6 29.6 161
Fisher Creek 9100 46.7 33.2 141 51.1 34.3 149
Northeast Entrance 7350 3.3 4.9 67 22.3 13.4 166
Parker Peak 9400 40.8 21.8 187 38.4 19.4 198
Sylvan Lake 8420 25.8 20.3 127 40.6 24.3 167
Thumb Divide 7980 19.5 14.1 138 29.5 20.3 145
Two Ocean Plateau 9240 -M 29.2 * -M 29.3 *
White Mill 8700 40.0 23.8 168 38.8 25.6 152
Wolverine 7650 3.0 5.2 58 22.7 13.3 171
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Basin Index (%) 144 151
WIND RIVER
Burroughs Creek 8750 19.9 -M * 28.4 -M *
Castle Creek 8400 8.0 -M * 17.1 -M *
Cold Springs 9630 15.2 2.7 563 20.8 11.7 178
Deer Park 9700 34.7 16.3 213 41.2 22.8 181
Hobbs Park 10100 32.1 15.7 204 31.3 15.9 197
Kirwin 9550 24.3 10.2 238 27.4 13.1 209
Little Warm 9370 18.8 9.4 200 25.9 14.6 177
Owl Creek 8975 8.2 2.3 357 14.4 7.4 195
South Pass 9040 31.8 15.2 209 30.8 19.6 157
St. Lawrence Alt 8620 7.7 4.6 167 18.9 10.9 173
Togwotee Pass 9580 35.5 24.5 145 41.4 26.5 156
Townsend Creek 8700 17.5 8.7 201 25.2 14.3 176
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Basin Index (%) 206 177
BIGHORN BASIN
Bald Mtn. 9380 22.4 20.5 109 19.5 18.9 103
Bear Trap Meadow 8200 6.5 1.7 382 13.7 10.0 137
Bone Springs Div 9350 22.4 16.4 137 20.0 17.4 115
Grave Springs 8550 10.1 9.2 110 11.9 12.3 97
Kirwin 9550 24.3 10.2 238 27.4 13.1 209
Marquette 8760 16.7 -M * 20.7 -M *
Middle Powder 7760 12.4 12.2 102 13.1 13.5 97
Owl Creek 8975 8.2 2.3 357 14.4 7.4 195
Powder River Pass 9480 10.6 10.1 105 16.2 14.3 113
Shell Creek 9580 19.5 15.9 123 17.1 15.5 110
Timber Creek 7950 6.9 3.6 192 13.3 9.2 145
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Basin Index (%) 140 127
SHOSHONE RIVER
Blackwater 9780 40.7 24.6 165 45.0 22.7 198
Evening Star 9200 40.3 24.6 164 47.6 29.6 161
Marquette 8760 16.7 -M * 20.7 -M *
Sylvan Road 7120 .0 7.9 0 31.9 18.0 177
Younts Peak 8350 24.2 15.1 160 32.8 17.1 192
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Basin Index (%) 146 180
POWDER RIVER
Bear Trap Meadow 8200 6.5 1.7 382 13.7 10.0 137
Cloud Peak Reservoir 9860 19.8 16.4 121 24.1 15.8 153
Grave Springs 8550 10.1 9.2 110 11.9 12.3 97
Hansen Sawmill 8360 14.0 4.1 341 18.9 10.3 183
Middle Powder 7760 12.4 12.2 102 13.1 13.5 97
Powder River Pass 9480 10.6 10.1 105 16.2 14.3 113
Soldier Park 8720 16.5 -M * 18.4 -M *
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Basin Index (%) 137 128
TONGUE RIVER
Big Goose 7990 13.4 9.1 147 17.6 13.5 130
Bone Springs Div 9350 22.4 16.4 137 20.0 17.4 115
Burgess Junction 7880 12.0 12.4 97 14.0 14.1 99
Dome Lake 8880 17.9 11.8 152 19.9 15.6 128
Little Goose 8870 16.8 -M * 21.7 -M *
Sucker Creek 8880 14.5 12.6 115 16.6 16.6 100
Tie Creek 6870 2.2 3.2 69 17.1 13.6 126
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Basin Index (%) 126 116
BELLE FOURCHE
Cole Canyon 5910 1.5 .6 250 10.9 11.0 99
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Basin Index (%) 250 99
CHEYENNE RIVER BASIN
Blind Park 6890 .2 3.2 6 10.7 13.7 78
North Rapid Creek 6130 .2 3.1 6 9.3 11.7 79
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Basin Index (%) 6 79
UPPER N. PLATTE
Arapaho Ridge 10960 25.1 21.9 115 28.3 25.6 111
Blackhall Mtn 9820 35.2 -M * 40.1 -M *
Columbine 9160 11.1 20.3 55 29.7 27.8 107
Divide Peak 8880 10.6 18.0 59 24.3 23.7 103
Joe Wright 10120 17.6 23.4 75 31.5 29.0 109
Laprele Creek 8375 6.1 7.2 85 13.9 14.5 96
Med Bow 10500 37.4 -M * 38.3 -M *
North French Creek 10130 25.8 32.8 79 30.8 29.8 103
Never Summer 10280 24.0 21.3 113 21.6 -M *
Old Battle 10000 38.0 34.3 111 40.7 38.2 107
Rawah 9020 5.3 8.0 66 19.5 16.7 117
Sage Creek Basin 7850 -M 2.2 * 17.5 15.7 111
Sand Lake 10050 31.4 31.1 101 30.1 28.1 107
South Brush Creek 8440 .3 10.0 3 14.3 17.2 83
Tower 10500 42.1 49.5 85 47.6 43.6 109
Webber Springs 9250 21.9 21.9 100 35.3 29.2 121
Willow Creek Pass 9540 18.4 13.8 133 19.8 15.2 130
Zirkel 9340 23.2 22.1 105 44.7 30.4 147
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Basin Index (%) 90 111
SWEETWATER
Deer Park 9700 34.7 16.3 213 41.2 22.8 181
Larsen Creek 9000 12.9 9.7 133 25.3 -M *
South Pass 9040 31.8 15.2 209 30.8 19.6 157
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Basin Index (%) 193 170
LOWER N. PLATTE
Casper Mtn. 7900 11.1 14.2 78 16.6 17.3 96
Laprele Creek 8375 6.1 7.2 85 13.9 14.5 96
Reno Hill 8400 12.3 13.7 90 17.0 18.1 94
Windy Peak 7900 3.8 5.8 66 13.0 12.5 104
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Basin Index (%) 81 97
LARAMIE RIVER
Brooklyn Lake 10240 19.9 22.9 87 24.6 23.9 103
Cinnabar Park 9574 12.7 20.0 64 24.3 26.3 92
Crow Creek 8330 .0 .0 * 11.4 12.9 88
Deadman Hill 10220 20.7 18.3 113 23.0 20.0 115
Rawah 9020 5.3 8.0 66 19.5 16.7 117
Roach 9700 15.0 16.9 89 23.2 21.6 107
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Basin Index (%) 85 104
S. PLATTE
Black Mountain 8920 7.7 -M * 14.9 -M *
Crow Creek 8330 .0 .0 * 11.4 12.9 88
Deadman Hill 10220 20.7 18.3 113 23.0 20.0 115
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Basin Index (%) 113* 105
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 1.6 0 18.9 16.7 113
Divide Peak 8880 10.6 18.0 59 24.3 23.7 103
Elk River 8700 5.0 14.4 35 22.3 22.1 101
Little Snake River 8915 21.8 23.2 94 41.4 31.8 130
Old Battle 10000 38.0 34.3 111 40.7 38.2 107
Sage Creek Basin 7850 -M 2.2 * 17.5 15.7 111
Sandstone RS 8150 -M 8.2 * 17.6 20.2 87
Whiskey Park 8950 22.8 25.6 89 33.1 30.7 108
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Basin Index (%) 84 108
UPPER GREEN RIVER
Big Sandy Opening 9080 22.6 12.0 188 25.3 14.7 172
Blind Bull Sum 8650 45.8 24.2 189 38.0 20.8 183
East Rim Divide 7930 10.6 8.9 119 22.1 12.5 177
Elkhart Park G.S. 9400 20.5 11.8 174 25.8 14.5 178
Gros Ventre Summit 8750 20.9 12.3 170 25.5 14.1 181
Gunsight Pass 9820 -M 13.4 * 27.0 15.5 174
Kendall R.S. 7740 15.3 6.3 243 30.2 15.0 201
Loomis Park 8240 24.0 11.6 207 33.6 18.4 183
New Fork Lake 8340 12.6 7.2 175 19.1 11.6 165
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 16.2 10.0 162 28.4 15.2 187
Spring Creek Divide 9000 43.0 23.9 180 42.7 25.5 167
Triple Peak 8500 35.5 18.9 188 43.2 27.1 159
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Basin Index (%) 182 176
LOWER GREEN RIVER
Blacks Fork Jct 8869 4.8 -M * 18.0 -M *
Buck Pasture 9632 15.7 -M * 26.0 -M *
EF Blacks Fork GS 9360 11.7 -M * 20.0 -M *
Hams Fork 7840 9.6 4.6 209 23.1 12.6 183
Hewinta 9500 6.6 6.5 102 19.8 15.6 127
Hickerson Park 9122 4.4 5.1 86 14.2 11.6 122
Hole-in-Rock 9168 4.7 4.6 102 15.0 11.1 135
Indian Creek 9425 42.1 23.8 177 43.6 24.3 179
Kelley R.S. 8180 23.7 11.8 201 32.7 19.6 167
Spirit Lk 10235 14.7 -M * 20.1 -M *
Steel Creek Park 10158 21.3 16.6 128 23.9 18.5 129
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Basin Index (%) 154 152
UPPER BEAR RIVER
Bear River RS 8777 1.5 -M * 20.5 -M *
Bug Lake 7987 31.9 16.2 197 36.2 21.1 172
Burts Miller Ranch 8000 .0 -M * 11.5 -M *
Chalk Creek #1 9171 33.0 24.7 134 39.6 27.7 143
Hayden Fork 9130 14.5 10.4 139 32.6 23.1 141
Kelley R.S. 8180 23.7 11.8 201 32.7 19.6 167
Lily Lake 9133 12.0 9.8 122 22.2 19.0 117
Monte Cristo 8932 37.2 27.3 136 43.0 28.4 151
Salt River Summit 7760 17.2 8.4 205 -M 17.9 *
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Basin Index (%) 156 149
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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.