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 SATURDAY: APRIL 8 , 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 24.1 15.2 159 39.3 20.7 190
Black Bear 8170 45.8 37.1 123 53.3 37.9 141
Blind Bull Sum 8650 43.1 23.3 185 -M 19.3 *
Cottonwood Creek 7670 27.4 20.9 131 37.8 24.4 155
East Rim Divide 7930 15.5 10.2 152 20.9 11.7 179
Grand Targhee 9260 45.5 38.7 118 39.4 30.7 128
Granite Creek 6770 26.0 14.3 182 35.8 19.5 184
Grassy Lake 7265 37.5 31.4 119 54.6 35.6 153
Gros Ventre Summit 8750 -M 12.9 * -M 12.8 *
Gunsight Pass 9820 23.1 13.9 166 25.0 13.8 181
Lewis Lake Divide 7850 45.9 30.0 153 54.8 35.1 156
Phillips Bench 8200 37.8 25.5 148 46.2 27.9 166
Salt River Summit 7760 19.5 12.7 154 28.8 16.5 175
Snake River Station 6920 18.4 14.8 124 35.7 22.2 161
Spring Creek Divide 9000 40.7 22.5 181 40.1 23.6 170
Thumb Divide 7980 22.5 14.7 153 27.9 18.4 152
Togwotee Pass 9580 33.5 22.2 151 38.5 24.1 160
Two Ocean Plateau 9240 -M 26.2 * -M 26.9 *
Willow Creek 8380 28.5 28.4 100 48.9 33.3 147
Younts Peak 8350 25.6 14.4 178 31.2 15.6 200
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Basin Index (%) 144 160
MADISON-GALLATIN
Black Bear 8170 45.8 37.1 123 53.3 37.9 141
Canyon 7870 17.4 12.4 140 25.6 16.1 159
Madison Plateau 7750 27.2 21.6 126 35.9 26.1 138
West Yellowstone 6700 6.2 9.3 67 23.2 14.1 165
Whiskey Creek 6800 13.5 14.8 91 26.6 20.0 133
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Basin Index (%) 116 144
YELLOWSTONE
Beartooth Lake 9360 32.6 21.4 152 27.7 19.5 142
Burnt Mtn 5880 .1 4.3 2 14.7 12.9 114
Canyon 7870 17.4 12.4 140 25.6 16.1 159
Cole Creek 7850 11.8 14.8 80 9.0 12.9 70
Evening Star 9200 38.2 23.8 161 44.5 27.1 164
Fisher Creek 9100 42.8 31.3 137 46.4 31.3 148
Northeast Entrance 7350 7.7 8.9 87 20.4 12.1 169
Parker Peak 9400 35.1 19.6 179 34.3 17.5 196
Sylvan Lake 8420 24.0 19.4 124 37.3 22.0 170
Thumb Divide 7980 22.5 14.7 153 27.9 18.4 152
Two Ocean Plateau 9240 -M 26.2 * -M 26.9 *
White Mill 8700 36.0 22.3 161 35.6 23.4 152
Wolverine 7650 6.1 9.6 64 21.0 12.1 174
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Basin Index (%) 135 153
WIND RIVER
Burroughs Creek 8750 23.3 -M * 27.6 -M *
Castle Creek 8400 11.0 -M * 15.8 -M *
Cold Springs 9630 17.6 6.6 267 20.0 9.9 202
Deer Park 9700 32.9 15.8 208 37.9 19.9 190
Hobbs Park 10100 29.9 14.2 211 28.2 13.5 209
Kirwin 9550 22.8 9.6 238 25.4 11.5 221
Little Warm 9370 -M 10.3 * 24.6 12.8 192
Owl Creek 8975 10.1 5.8 174 12.6 6.0 210
South Pass 9040 31.7 15.3 207 28.6 17.3 165
St. Lawrence Alt 8620 10.6 6.9 154 17.4 9.0 193
Togwotee Pass 9580 33.5 22.2 151 38.5 24.1 160
Townsend Creek 8700 18.7 9.7 193 23.0 12.0 192
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Basin Index (%) 196 188
BIGHORN BASIN
Bald Mtn. 9380 19.4 19.2 101 17.0 16.8 101
Bear Trap Meadow 8200 4.8 4.9 98 8.7 8.6 101
Bone Springs Div 9350 20.0 16.9 118 18.0 15.5 116
Grave Springs 8550 6.9 9.5 73 7.9 10.7 74
Kirwin 9550 22.8 9.6 238 25.4 11.5 221
Marquette 8760 14.3 -M * 17.7 -M *
Middle Powder 7760 7.3 12.1 60 7.7 11.7 66
Owl Creek 8975 10.1 5.8 174 12.6 6.0 210
Powder River Pass 9480 9.1 10.2 89 13.5 12.6 107
Shell Creek 9580 17.4 15.2 114 14.7 13.7 107
Timber Creek 7950 8.2 5.0 164 11.7 7.3 160
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Basin Index (%) 116 120
SHOSHONE RIVER
Blackwater 9780 38.1 22.7 168 42.1 20.3 207
Evening Star 9200 38.2 23.8 161 44.5 27.1 164
Marquette 8760 14.3 -M * 17.7 -M *
Sylvan Road 7120 6.7 10.7 63 30.5 16.5 185
Younts Peak 8350 25.6 14.4 178 31.2 15.6 200
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Basin Index (%) 152 187
POWDER RIVER
Bear Trap Meadow 8200 4.8 4.9 98 8.7 8.6 101
Cloud Peak Reservoir 9860 16.3 14.9 109 18.3 13.4 137
Grave Springs 8550 6.9 9.5 73 7.9 10.7 74
Hansen Sawmill 8360 11.2 6.1 184 14.2 8.6 165
Middle Powder 7760 7.3 12.1 60 7.7 11.7 66
Powder River Pass 9480 9.1 10.2 89 13.5 12.6 107
Soldier Park 8720 14.9 -M * 14.2 -M *
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Basin Index (%) 96 107
TONGUE RIVER
Big Goose 7990 11.9 9.7 123 14.2 11.5 123
Bone Springs Div 9350 20.0 16.9 118 18.0 15.5 116
Burgess Junction 7880 10.6 12.0 88 12.1 12.3 98
Dome Lake 8880 16.5 11.8 140 16.8 13.6 124
Little Goose 8870 13.8 -M * 17.3 -M *
Sucker Creek 8880 13.4 12.3 109 14.1 14.4 98
Tie Creek 6870 3.7 5.6 66 13.8 11.7 118
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Basin Index (%) 111 113
BELLE FOURCHE
Cole Canyon 5910 .0 4.9 0 7.5 9.6 78
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Basin Index (%) 0 78
CHEYENNE RIVER BASIN
Blind Park 6890 .0 6.9 0 9.1 11.9 76
North Rapid Creek 6130 .0 6.4 0 7.7 10.0 77
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Basin Index (%) 0 77
UPPER N. PLATTE
Arapaho Ridge 10960 25.0 21.0 119 26.0 22.6 115
Blackhall Mtn 9820 35.8 -M * 37.4 -M *
Columbine 9160 17.9 23.4 76 27.4 25.5 107
Divide Peak 8880 15.8 20.0 79 22.6 21.4 106
Joe Wright 10120 18.6 21.4 87 28.6 25.8 111
Laprele Creek 8375 10.4 9.4 111 12.6 12.5 101
Med Bow 10500 38.4 -M * 34.8 -M *
North French Creek 10130 24.4 29.7 82 27.1 26.7 101
Never Summer 10280 -M 20.4 * 19.3 -M *
Old Battle 10000 35.8 31.5 114 38.0 34.9 109
Rawah 9020 8.9 10.6 84 17.0 14.4 118
Sage Creek Basin 7850 5.3 11.6 46 16.4 14.6 112
Sand Lake 10050 30.6 29.1 105 27.4 24.8 110
South Brush Creek 8440 3.3 11.8 28 12.8 15.2 84
Tower 10500 39.0 46.0 85 43.3 39.8 109
Webber Springs 9250 25.8 23.1 112 33.1 26.7 124
Willow Creek Pass 9540 18.0 12.2 148 18.6 13.4 139
Zirkel 9340 32.0 26.2 122 41.7 28.5 146
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Basin Index (%) 95 113
SWEETWATER
Deer Park 9700 32.9 15.8 208 37.9 19.9 190
Larsen Creek 9000 16.6 11.5 144 23.3 -M *
South Pass 9040 31.7 15.3 207 28.6 17.3 165
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Basin Index (%) 191 179
LOWER N. PLATTE
Casper Mtn. 7900 11.4 14.4 79 13.0 15.1 86
Laprele Creek 8375 10.4 9.4 111 12.6 12.5 101
Reno Hill 8400 12.5 14.0 89 14.4 15.6 92
Windy Peak 7900 8.4 7.7 109 11.9 10.6 112
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Basin Index (%) 94 96
LARAMIE RIVER
Brooklyn Lake 10240 22.8 22.0 104 23.1 21.1 109
Cinnabar Park 9574 17.2 21.3 81 22.2 24.1 92
Crow Creek 8330 .0 6.9 0 9.3 10.9 85
Deadman Hill 10220 21.1 16.2 130 20.4 17.3 118
Rawah 9020 8.9 10.6 84 17.0 14.4 118
Roach 9700 16.5 16.6 99 21.1 19.1 110
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Basin Index (%) 92 106
S. PLATTE
Black Mountain 8920 10.9 -M * 13.1 -M *
Crow Creek 8330 .0 6.9 0 9.3 10.9 85
Deadman Hill 10220 21.1 16.2 130 20.4 17.3 118
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Basin Index (%) 91 105
LITTLE SNAKE RIVER
Battle Mountain 7440 -M 9.3 * 16.7 15.0 111
Divide Peak 8880 15.8 20.0 79 22.6 21.4 106
Elk River 8700 11.9 19.1 62 20.2 20.0 101
Little Snake River 8915 26.2 25.5 103 38.4 29.9 128
Old Battle 10000 35.8 31.5 114 38.0 34.9 109
Sage Creek Basin 7850 5.3 11.6 46 16.4 14.6 112
Sandstone RS 8150 5.8 12.8 45 16.2 18.3 89
Whiskey Park 8950 25.5 27.5 93 29.7 27.9 106
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Basin Index (%) 85 109
UPPER GREEN RIVER
Big Sandy Opening 9080 21.2 12.7 167 23.1 13.2 175
Blind Bull Sum 8650 43.1 23.3 185 -M 19.3 *
East Rim Divide 7930 15.5 10.2 152 20.9 11.7 179
Elkhart Park G.S. 9400 19.3 12.3 157 24.1 13.2 183
Gros Ventre Summit 8750 -M 12.9 * -M 12.8 *
Gunsight Pass 9820 23.1 13.9 166 25.0 13.8 181
Kendall R.S. 7740 19.8 11.4 174 29.1 14.1 206
Loomis Park 8240 26.6 13.8 193 32.0 17.2 186
New Fork Lake 8340 15.4 10.3 150 17.8 10.7 166
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 18.1 12.3 147 27.1 14.1 192
Spring Creek Divide 9000 40.7 22.5 181 40.1 23.6 170
Triple Peak 8500 36.0 21.8 165 40.4 25.1 161
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Basin Index (%) 169 178
LOWER GREEN RIVER
Blacks Fork Jct 8869 8.8 -M * 16.0 -M *
Buck Pasture 9632 17.7 -M * 23.6 -M *
EF Blacks Fork GS 9360 14.9 -M * 17.0 -M *
Hams Fork 7840 13.8 10.5 131 21.4 11.3 189
Hewinta 9500 8.8 10.9 81 17.4 14.0 124
Hickerson Park 9122 9.4 7.9 119 13.3 10.2 130
Hole-in-Rock 9168 7.5 7.0 107 13.8 9.7 142
Indian Creek 9425 40.1 24.7 162 40.8 22.4 182
Kelley R.S. 8180 24.9 14.6 171 30.0 18.0 167
Spirit Lk 10235 16.7 -M * 18.9 -M *
Steel Creek Park 10158 19.1 15.8 121 21.1 16.5 128
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Basin Index (%) 135 155
UPPER BEAR RIVER
Bear River RS 8777 8.5 -M * 18.6 -M *
Bug Lake 7987 32.7 18.5 177 33.8 19.3 175
Burts Miller Ranch 8000 1.9 -M * 10.2 -M *
Chalk Creek #1 9171 33.5 24.4 137 36.0 25.1 143
Hayden Fork 9130 19.3 15.3 126 29.8 21.1 141
Kelley R.S. 8180 24.9 14.6 171 30.0 18.0 167
Lily Lake 9133 13.6 12.7 107 19.8 17.1 116
Monte Cristo 8932 35.9 27.8 129 38.9 25.9 150
Salt River Summit 7760 19.5 12.7 154 28.8 16.5 175
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Basin Index (%) 142 152
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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.