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 2 , 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 23.4 14.9 157 38.6 20.3 190
Black Bear 8170 44.7 36.6 122 52.0 36.8 141
Blind Bull Sum 8650 42.2 22.6 187 -M 18.9 *
Cottonwood Creek 7670 26.2 21.3 123 36.5 23.8 153
East Rim Divide 7930 16.4 10.0 164 20.7 11.4 182
Grand Targhee 9260 43.3 36.9 117 38.9 29.9 130
Granite Creek 6770 26.5 14.8 179 35.4 19.2 184
Grassy Lake 7265 35.4 31.6 112 52.6 34.8 151
Gros Ventre Summit 8750 19.4 13.0 149 23.5 12.5 188
Gunsight Pass 9820 21.7 13.4 162 23.7 13.3 178
Lewis Lake Divide 7850 44.3 29.5 150 54.2 34.3 158
Phillips Bench 8200 36.5 24.4 150 45.3 27.3 166
Salt River Summit 7760 19.4 12.9 150 28.2 16.1 175
Snake River Station 6920 17.9 15.3 117 34.5 21.7 159
Spring Creek Divide 9000 39.7 22.5 176 39.4 23.1 171
Thumb Divide 7980 22.1 14.8 149 27.1 17.9 151
Togwotee Pass 9580 32.2 21.7 148 37.0 23.4 158
Two Ocean Plateau 9240 -M 25.6 * -M 26.3 *
Willow Creek 8380 28.2 28.0 101 47.3 32.4 146
Younts Peak 8350 25.2 14.2 177 30.6 15.2 201
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Basin Index (%) 142 161
MADISON-GALLATIN
Black Bear 8170 44.7 36.6 122 52.0 36.8 141
Canyon 7870 17.0 12.4 137 24.9 15.7 159
Madison Plateau 7750 26.2 21.4 122 35.0 25.4 138
West Yellowstone 6700 7.4 10.2 73 22.4 13.6 165
Whiskey Creek 6800 13.3 15.0 89 26.0 19.4 134
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Basin Index (%) 114 145
YELLOWSTONE
Beartooth Lake 9360 31.6 21.1 150 27.0 19.0 142
Burnt Mtn 5880 .8 4.4 18 14.4 12.3 117
Canyon 7870 17.0 12.4 137 24.9 15.7 159
Cole Creek 7850 11.3 13.7 82 8.2 12.1 68
Evening Star 9200 37.6 23.9 157 43.8 26.3 167
Fisher Creek 9100 42.6 30.4 140 46.0 30.5 151
Northeast Entrance 7350 8.7 9.5 92 20.0 11.8 169
Parker Peak 9400 33.2 18.9 176 33.2 17.0 195
Sylvan Lake 8420 23.0 19.2 120 36.0 21.5 167
Thumb Divide 7980 22.1 14.8 149 27.1 17.9 151
Two Ocean Plateau 9240 -M 25.6 * -M 26.3 *
White Mill 8700 35.0 21.7 161 35.3 22.8 155
Wolverine 7650 7.2 9.2 78 20.5 11.8 174
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Basin Index (%) 136 154
WIND RIVER
Burroughs Creek 8750 22.9 -M * 27.0 -M *
Castle Creek 8400 10.4 -M * 14.7 -M *
Cold Springs 9630 16.9 7.1 238 19.3 9.6 201
Deer Park 9700 32.5 14.8 220 37.5 18.8 199
Hobbs Park 10100 29.1 13.5 216 27.3 12.7 215
Kirwin 9550 22.2 9.5 234 24.5 11.1 221
Little Warm 9370 18.1 10.2 177 23.8 12.3 193
Owl Creek 8975 9.2 5.6 164 11.6 5.7 204
South Pass 9040 31.1 14.9 209 28.3 16.7 169
St. Lawrence Alt 8620 -M 6.8 * 16.8 8.6 195
Togwotee Pass 9580 32.2 21.7 148 37.0 23.4 158
Townsend Creek 8700 18.4 9.1 202 22.5 11.4 197
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Basin Index (%) 197 191
BIGHORN BASIN
Bald Mtn. 9380 18.8 18.8 100 16.2 16.4 99
Bear Trap Meadow 8200 4.6 5.1 90 7.7 8.1 95
Bone Springs Div 9350 19.0 16.1 118 17.3 14.9 116
Grave Springs 8550 6.7 9.0 74 7.4 10.1 73
Kirwin 9550 22.2 9.5 234 24.5 11.1 221
Marquette 8760 12.2 -M * 16.4 -M *
Middle Powder 7760 7.0 11.5 61 7.0 11.2 62
Owl Creek 8975 9.2 5.6 164 11.6 5.7 204
Powder River Pass 9480 8.1 10.0 81 12.0 12.0 100
Shell Creek 9580 16.5 14.7 112 13.6 13.2 103
Timber Creek 7950 7.2 4.8 150 10.5 7.1 148
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Basin Index (%) 114 116
SHOSHONE RIVER
Blackwater 9780 36.9 22.2 166 41.2 19.8 208
Evening Star 9200 37.6 23.9 157 43.8 26.3 167
Marquette 8760 12.2 -M * 16.4 -M *
Sylvan Road 7120 8.3 11.1 75 29.9 16.1 186
Younts Peak 8350 25.2 14.2 177 30.6 15.2 201
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Basin Index (%) 151 188
POWDER RIVER
Bear Trap Meadow 8200 4.6 5.1 90 7.7 8.1 95
Cloud Peak Reservoir 9860 15.3 14.2 108 17.0 12.7 134
Grave Springs 8550 6.7 9.0 74 7.4 10.1 73
Hansen Sawmill 8360 -M 6.3 * 13.2 8.2 161
Middle Powder 7760 7.0 11.5 61 7.0 11.2 62
Powder River Pass 9480 8.1 10.0 81 12.0 12.0 100
Soldier Park 8720 14.6 -M * 13.4 -M *
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Basin Index (%) 84 103
TONGUE RIVER
Big Goose 7990 11.3 9.1 124 13.2 10.8 122
Bone Springs Div 9350 19.0 16.1 118 17.3 14.9 116
Burgess Junction 7880 10.2 11.4 89 11.4 11.8 97
Dome Lake 8880 15.7 11.6 135 15.7 13.0 121
Little Goose 8870 12.8 -M * 16.0 -M *
Sucker Creek 8880 12.7 11.5 110 12.8 13.8 93
Tie Creek 6870 4.4 5.5 80 13.5 11.0 123
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Basin Index (%) 112 111
BELLE FOURCHE
Cole Canyon 5910 .0 5.8 0 6.9 8.9 78
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Basin Index (%) 0 78
CHEYENNE RIVER BASIN
Blind Park 6890 .0 7.2 0 8.3 11.3 73
North Rapid Creek 6130 .0 6.8 0 6.9 9.3 74
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Basin Index (%) 0 74
UPPER N. PLATTE
Arapaho Ridge 10960 24.2 20.0 121 25.0 21.5 116
Blackhall Mtn 9820 35.2 -M * 36.4 -M *
Columbine 9160 19.0 23.0 83 26.6 24.6 108
Divide Peak 8880 15.3 19.6 78 21.8 20.7 105
Joe Wright 10120 17.4 20.4 85 27.1 24.8 109
Laprele Creek 8375 10.7 9.5 113 12.0 11.9 101
Med Bow 10500 37.0 -M * 33.9 -M *
North French Creek 10130 23.4 28.2 83 26.4 25.8 102
Never Summer 10280 21.0 19.8 106 18.2 -M *
Old Battle 10000 35.5 30.0 118 37.3 33.9 110
Rawah 9020 9.0 10.4 87 16.2 13.7 118
Sage Creek Basin 7850 6.8 12.6 54 15.9 14.0 114
Sand Lake 10050 29.8 27.8 107 26.7 23.8 112
South Brush Creek 8440 4.7 12.2 39 12.1 14.7 82
Tower 10500 39.1 44.4 88 42.5 38.3 111
Webber Springs 9250 25.5 23.0 111 32.5 25.8 126
Willow Creek Pass 9540 17.0 11.8 144 17.8 12.9 138
Zirkel 9340 32.8 26.4 124 41.0 27.5 149
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Basin Index (%) 98 114
SWEETWATER
Deer Park 9700 32.5 14.8 220 37.5 18.8 199
Larsen Creek 9000 17.3 12.1 143 23.0 -M *
South Pass 9040 31.1 14.9 209 28.3 16.7 169
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Basin Index (%) 194 185
LOWER N. PLATTE
Casper Mtn. 7900 10.7 13.6 79 12.1 14.1 86
Laprele Creek 8375 10.7 9.5 113 12.0 11.9 101
Reno Hill 8400 12.1 13.4 90 13.5 14.6 92
Windy Peak 7900 8.4 7.8 108 11.2 10.1 111
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Basin Index (%) 95 96
LARAMIE RIVER
Brooklyn Lake 10240 22.6 20.3 111 22.5 20.3 111
Cinnabar Park 9574 17.4 20.2 86 21.7 23.2 94
Crow Creek 8330 .2 6.9 3 9.0 10.3 87
Deadman Hill 10220 20.1 15.7 128 19.5 16.5 118
Rawah 9020 9.0 10.4 87 16.2 13.7 118
Roach 9700 16.2 15.8 103 20.2 18.4 110
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Basin Index (%) 96 107
S. PLATTE
Black Mountain 8920 10.7 -M * 12.3 -M *
Crow Creek 8330 .2 6.9 3 9.0 10.3 87
Deadman Hill 10220 20.1 15.7 128 19.5 16.5 118
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Basin Index (%) 90 106
LITTLE SNAKE RIVER
Battle Mountain 7440 -M 10.5 * 16.3 14.6 112
Divide Peak 8880 15.3 19.6 78 21.8 20.7 105
Elk River 8700 12.5 18.7 67 19.7 19.4 102
Little Snake River 8915 26.4 23.5 112 37.8 28.8 131
Old Battle 10000 35.5 30.0 118 37.3 33.9 110
Sage Creek Basin 7850 6.8 12.6 54 15.9 14.0 114
Sandstone RS 8150 7.2 13.0 55 15.9 17.8 89
Whiskey Park 8950 25.1 26.1 96 29.1 27.0 108
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Basin Index (%) 90 110
UPPER GREEN RIVER
Big Sandy Opening 9080 20.9 12.4 169 22.9 12.7 180
Blind Bull Sum 8650 42.2 22.6 187 -M 18.9 *
East Rim Divide 7930 16.4 10.0 164 20.7 11.4 182
Elkhart Park G.S. 9400 18.7 12.1 155 23.7 12.8 185
Gros Ventre Summit 8750 19.4 13.0 149 23.5 12.5 188
Gunsight Pass 9820 21.7 13.4 162 23.7 13.3 178
Kendall R.S. 7740 20.2 11.4 177 28.5 13.8 207
Loomis Park 8240 26.3 14.2 185 31.7 16.8 189
New Fork Lake 8340 15.3 10.4 147 17.4 10.4 167
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 18.6 12.3 151 27.0 13.8 196
Spring Creek Divide 9000 39.7 22.5 176 39.4 23.1 171
Triple Peak 8500 -M 21.8 * -M 24.5 *
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Basin Index (%) 168 184
LOWER GREEN RIVER
Blacks Fork Jct 8869 9.2 -M * 15.8 -M *
Buck Pasture 9632 17.6 -M * 23.3 -M *
EF Blacks Fork GS 9360 15.3 -M * 17.1 -M *
Hams Fork 7840 14.1 10.9 129 21.2 11.0 193
Hewinta 9500 9.0 10.9 83 17.1 13.5 127
Hickerson Park 9122 9.8 7.6 129 13.0 9.8 133
Hole-in-Rock 9168 7.9 6.9 114 13.6 9.2 148
Indian Creek 9425 39.6 24.1 164 -M 21.8 *
Kelley R.S. 8180 25.1 15.0 167 29.9 17.5 171
Spirit Lk 10235 16.5 -M * 18.7 -M *
Steel Creek Park 10158 18.8 15.4 122 20.7 15.8 131
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Basin Index (%) 137 150
UPPER BEAR RIVER
Bear River RS 8777 9.4 -M * 18.4 -M *
Bug Lake 7987 31.8 18.2 175 33.6 18.8 179
Burts Miller Ranch 8000 3.4 -M * 10.0 -M *
Chalk Creek #1 9171 33.4 23.6 142 35.8 24.3 147
Hayden Fork 9130 19.6 15.2 129 29.5 20.3 145
Kelley R.S. 8180 25.1 15.0 167 29.9 17.5 171
Lily Lake 9133 13.9 12.2 114 19.8 16.5 120
Monte Cristo 8932 35.4 26.6 133 38.4 25.1 153
Salt River Summit 7760 19.4 12.9 150 28.2 16.1 175
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Basin Index (%) 144 155
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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.