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 22 , 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 21.3 11.5 185 40.7 21.9 186
Black Bear 8170 48.2 36.9 131 56.4 40.2 140
Blind Bull Sum 8650 44.5 24.2 184 37.3 20.4 183
Cottonwood Creek 7670 27.6 18.1 152 40.5 26.1 155
East Rim Divide 7930 11.7 9.4 124 21.5 12.3 175
Grand Targhee 9260 51.9 42.5 122 46.1 32.9 140
Granite Creek 6770 22.4 10.3 217 36.9 20.4 181
Grassy Lake 7265 37.3 30.8 121 57.7 37.7 153
Gros Ventre Summit 8750 -M 13.0 * -M 13.8 *
Gunsight Pass 9820 24.2 13.7 177 26.3 15.0 175
Lewis Lake Divide 7850 46.5 30.6 152 57.6 37.1 155
Phillips Bench 8200 39.1 25.3 155 48.2 29.4 164
Salt River Summit 7760 17.5 9.2 190 30.0 17.5 171
Snake River Station 6920 14.9 11.1 134 37.3 23.7 157
Spring Creek Divide 9000 42.1 23.6 178 41.8 25.0 167
Thumb Divide 7980 20.7 14.4 144 29.1 19.8 147
Togwotee Pass 9580 34.9 24.2 144 40.6 25.9 157
Two Ocean Plateau 9240 -M 28.5 * -M 28.8 *
Willow Creek 8380 27.9 26.6 105 53.1 35.6 149
Younts Peak 8350 24.6 15.2 162 32.2 16.8 192
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Basin Index (%) 148 160
MADISON-GALLATIN
Black Bear 8170 48.2 36.9 131 56.4 40.2 140
Canyon 7870 17.5 12.1 145 26.6 17.2 155
Madison Plateau 7750 28.1 22.9 123 37.9 27.7 137
West Yellowstone 6700 1.8 6.5 28 24.1 15.2 159
Whiskey Creek 6800 12.4 15.4 81 27.9 21.4 130
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Basin Index (%) 115 142
YELLOWSTONE
Beartooth Lake 9360 34.5 23.6 146 29.5 20.9 141
Burnt Mtn 5880 .2 .0 * 15.5 14.5 107
Canyon 7870 17.5 12.1 145 26.6 17.2 155
Cole Creek 7850 12.5 16.4 76 10.0 14.8 68
Evening Star 9200 39.8 24.6 162 47.0 29.0 162
Fisher Creek 9100 45.5 32.8 139 50.0 33.7 148
Northeast Entrance 7350 3.7 6.0 62 21.6 13.1 165
Parker Peak 9400 39.5 21.2 186 37.0 18.9 196
Sylvan Lake 8420 25.4 20.4 125 39.7 23.8 167
Thumb Divide 7980 20.7 14.4 144 29.1 19.8 147
Two Ocean Plateau 9240 -M 28.5 * -M 28.8 *
White Mill 8700 38.8 23.7 164 37.9 25.1 151
Wolverine 7650 3.2 6.6 48 22.2 13.0 171
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Basin Index (%) 139 150
WIND RIVER
Burroughs Creek 8750 20.6 -M * 28.1 -M *
Castle Creek 8400 8.4 -M * 16.9 -M *
Cold Springs 9630 15.7 4.1 383 20.6 11.1 186
Deer Park 9700 34.4 16.3 211 40.5 21.8 186
Hobbs Park 10100 31.6 15.1 209 30.1 15.1 199
Kirwin 9550 24.0 10.0 240 27.2 12.7 214
Little Warm 9370 18.7 10.0 187 25.6 14.0 183
Owl Creek 8975 8.7 3.5 249 14.3 7.0 204
South Pass 9040 32.0 15.4 208 30.4 18.8 162
St. Lawrence Alt 8620 8.4 5.1 165 18.6 10.1 184
Togwotee Pass 9580 34.9 24.2 144 40.6 25.9 157
Townsend Creek 8700 17.8 9.1 196 24.5 13.5 181
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Basin Index (%) 201 182
BIGHORN BASIN
Bald Mtn. 9380 21.4 20.0 107 18.7 18.4 102
Bear Trap Meadow 8200 5.1 2.7 189 11.7 9.6 122
Bone Springs Div 9350 21.3 16.2 131 19.3 17.0 114
Grave Springs 8550 8.4 9.4 89 10.4 11.9 87
Kirwin 9550 24.0 10.0 240 27.2 12.7 214
Marquette 8760 15.6 -M * 19.5 -M *
Middle Powder 7760 10.3 12.4 83 9.8 13.0 75
Owl Creek 8975 8.7 3.5 249 14.3 7.0 204
Powder River Pass 9480 10.1 10.2 99 15.5 13.9 112
Shell Creek 9580 19.2 15.6 123 16.7 15.0 111
Timber Creek 7950 7.2 4.4 164 13.0 8.6 151
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Basin Index (%) 130 123
SHOSHONE RIVER
Blackwater 9780 39.9 24.0 166 44.3 22.0 201
Evening Star 9200 39.8 24.6 162 47.0 29.0 162
Marquette 8760 15.6 -M * 19.5 -M *
Sylvan Road 7120 .0 9.2 0 31.7 17.8 178
Younts Peak 8350 24.6 15.2 162 32.2 16.8 192
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Basin Index (%) 143 181
POWDER RIVER
Bear Trap Meadow 8200 5.1 2.7 189 11.7 9.6 122
Cloud Peak Reservoir 9860 18.6 16.0 116 22.2 15.2 146
Grave Springs 8550 8.4 9.4 89 10.4 11.9 87
Hansen Sawmill 8360 12.3 4.5 273 17.4 9.8 178
Middle Powder 7760 10.3 12.4 83 9.8 13.0 75
Powder River Pass 9480 10.1 10.2 99 15.5 13.9 112
Soldier Park 8720 15.6 -M * 17.1 -M *
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Basin Index (%) 117 119
TONGUE RIVER
Big Goose 7990 12.3 9.2 134 15.9 12.9 123
Bone Springs Div 9350 21.3 16.2 131 19.3 17.0 114
Burgess Junction 7880 11.1 12.7 87 13.0 13.7 95
Dome Lake 8880 16.9 11.8 143 18.3 15.1 121
Little Goose 8870 15.2 -M * 19.8 -M *
Sucker Creek 8880 13.6 12.7 107 15.4 16.0 96
Tie Creek 6870 .2 4.1 5 14.9 13.1 114
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Basin Index (%) 113 110
BELLE FOURCHE
Cole Canyon 5910 .0 1.6 0 8.8 10.6 83
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Basin Index (%) 0 83
CHEYENNE RIVER BASIN
Blind Park 6890 .0 3.9 0 10.3 13.3 77
North Rapid Creek 6130 .0 3.9 0 8.8 11.3 78
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Basin Index (%) 0 78
UPPER N. PLATTE
Arapaho Ridge 10960 24.6 21.4 115 27.5 24.5 112
Blackhall Mtn 9820 34.4 -M * 38.8 -M *
Columbine 9160 10.9 20.6 53 28.6 27.2 105
Divide Peak 8880 10.9 18.4 59 23.6 23.0 103
Joe Wright 10120 17.0 22.5 76 30.5 28.1 109
Laprele Creek 8375 6.7 7.7 87 13.5 13.9 97
Med Bow 10500 35.9 -M * 36.9 -M *
North French Creek 10130 24.6 32.1 77 29.4 28.9 102
Never Summer 10280 23.3 20.8 112 21.0 -M *
Old Battle 10000 36.8 33.2 111 39.4 37.4 105
Rawah 9020 5.3 8.2 65 18.8 15.7 120
Sage Creek Basin 7850 -M 4.9 * 17.0 15.3 111
Sand Lake 10050 30.5 30.6 100 29.0 27.1 107
South Brush Creek 8440 .8 9.7 8 13.3 16.7 80
Tower 10500 39.8 48.5 82 45.6 42.5 107
Webber Springs 9250 22.5 21.8 103 34.2 28.6 120
Willow Creek Pass 9540 18.2 13.4 136 19.3 14.6 132
Zirkel 9340 23.2 22.6 103 43.4 29.9 145
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Basin Index (%) 89 111
SWEETWATER
Deer Park 9700 34.4 16.3 211 40.5 21.8 186
Larsen Creek 9000 12.9 10.1 128 24.7 -M *
South Pass 9040 32.0 15.4 208 30.4 18.8 162
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Basin Index (%) 190 175
LOWER N. PLATTE
Casper Mtn. 7900 9.9 14.3 69 14.6 16.8 87
Laprele Creek 8375 6.7 7.7 87 13.5 13.9 97
Reno Hill 8400 12.1 14.0 86 16.1 17.4 93
Windy Peak 7900 4.4 6.4 69 12.8 11.8 108
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Basin Index (%) 78 95
LARAMIE RIVER
Brooklyn Lake 10240 19.7 22.4 88 23.9 23.1 103
Cinnabar Park 9574 12.7 19.9 64 23.4 25.7 91
Crow Creek 8330 1.5 .4 375* 11.0 12.1 91
Deadman Hill 10220 20.5 17.4 118 22.3 19.2 116
Rawah 9020 5.3 8.2 65 18.8 15.7 120
Roach 9700 14.8 16.6 89 22.3 20.9 107
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Basin Index (%) 88 104
S. PLATTE
Black Mountain 8920 8.2 -M * 14.5 -M *
Crow Creek 8330 1.5 .4 375* 11.0 12.1 91
Deadman Hill 10220 20.5 17.4 118 22.3 19.2 116
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Basin Index (%) 124* 106
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 3.5 0 17.8 16.2 110
Divide Peak 8880 10.9 18.4 59 23.6 23.0 103
Elk River 8700 5.5 15.0 37 21.2 21.5 99
Little Snake River 8915 21.4 23.8 90 40.1 31.2 129
Old Battle 10000 36.8 33.2 111 39.4 37.4 105
Sage Creek Basin 7850 -M 4.9 * 17.0 15.3 111
Sandstone RS 8150 .1 9.8 1 16.2 19.7 82
Whiskey Park 8950 21.7 25.7 84 31.7 29.9 106
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Basin Index (%) 74 107
UPPER GREEN RIVER
Big Sandy Opening 9080 21.9 12.4 177 24.6 14.3 172
Blind Bull Sum 8650 44.5 24.2 184 37.3 20.4 183
East Rim Divide 7930 11.7 9.4 124 21.5 12.3 175
Elkhart Park G.S. 9400 19.8 11.9 166 25.2 14.2 177
Gros Ventre Summit 8750 -M 13.0 * -M 13.8 *
Gunsight Pass 9820 24.2 13.7 177 26.3 15.0 175
Kendall R.S. 7740 16.1 7.7 209 29.7 14.8 201
Loomis Park 8240 24.5 12.5 196 33.0 18.1 182
New Fork Lake 8340 12.9 8.3 155 18.7 11.4 164
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 15.8 10.5 150 28.1 14.9 189
Spring Creek Divide 9000 42.1 23.6 178 41.8 25.0 167
Triple Peak 8500 35.5 19.2 185 42.5 26.6 160
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Basin Index (%) 175 176
LOWER GREEN RIVER
Blacks Fork Jct 8869 5.0 -M * 17.3 -M *
Buck Pasture 9632 15.4 -M * 25.0 -M *
EF Blacks Fork GS 9360 11.7 -M * 19.0 -M *
Hams Fork 7840 11.0 6.0 183 22.6 12.2 185
Hewinta 9500 6.9 7.6 91 18.9 15.2 124
Hickerson Park 9122 5.3 5.2 102 13.6 11.2 121
Hole-in-Rock 9168 5.5 5.6 98 14.5 10.7 136
Indian Creek 9425 41.1 23.5 175 42.7 23.8 179
Kelley R.S. 8180 23.7 12.2 194 31.9 19.1 167
Spirit Lk 10235 15.1 -M * 19.6 -M *
Steel Creek Park 10158 20.3 16.3 125 22.9 18.0 127
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Basin Index (%) 149 152
UPPER BEAR RIVER
Bear River RS 8777 2.6 -M * 19.9 -M *
Bug Lake 7987 31.9 16.6 192 35.6 20.6 173
Burts Miller Ranch 8000 .0 -M * 11.1 -M *
Chalk Creek #1 9171 32.0 24.5 131 38.4 27.1 142
Hayden Fork 9130 14.8 11.2 132 31.4 22.6 139
Kelley R.S. 8180 23.7 12.2 194 31.9 19.1 167
Lily Lake 9133 11.8 10.2 116 21.5 18.5 116
Monte Cristo 8932 36.1 27.3 132 41.8 27.7 151
Salt River Summit 7760 17.5 9.2 190 30.0 17.5 171
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Basin Index (%) 151 151
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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.