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 THURSDAY: APRIL 20 , 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 21.7 11.9 182 40.6 21.7 187
Black Bear 8170 48.3 36.9 131 56.1 39.8 141
Blind Bull Sum 8650 44.2 24.0 184 -M 20.2 *
Cottonwood Creek 7670 27.4 18.6 147 40.1 25.8 155
East Rim Divide 7930 12.4 9.5 131 21.4 12.2 175
Grand Targhee 9260 50.2 42.0 120 44.7 32.6 137
Granite Creek 6770 22.9 10.8 212 36.8 20.3 181
Grassy Lake 7265 37.6 31.3 120 57.3 37.3 154
Gros Ventre Summit 8750 -M 13.2 * -M 13.7 *
Gunsight Pass 9820 24.2 13.6 178 26.1 14.9 175
Lewis Lake Divide 7850 46.9 30.4 154 57.6 36.8 157
Phillips Bench 8200 38.9 25.6 152 47.9 29.2 164
Salt River Summit 7760 17.8 9.7 184 29.9 17.4 172
Snake River Station 6920 16.0 11.3 142 37.2 23.5 158
Spring Creek Divide 9000 42.0 23.5 179 41.6 24.7 168
Thumb Divide 7980 21.1 14.5 146 29.1 19.7 148
Togwotee Pass 9580 34.3 23.8 144 40.0 25.7 156
Two Ocean Plateau 9240 -M 28.1 * -M 28.5 *
Willow Creek 8380 27.8 26.8 104 52.2 35.3 148
Younts Peak 8350 24.7 15.1 164 32.0 16.6 193
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Basin Index (%) 147 159
MADISON-GALLATIN
Black Bear 8170 48.3 36.9 131 56.1 39.8 141
Canyon 7870 17.7 12.2 145 26.6 17.0 156
Madison Plateau 7750 28.2 22.9 123 37.8 27.5 137
West Yellowstone 6700 2.6 7.4 35 24.1 15.1 160
Whiskey Creek 6800 12.8 15.3 84 27.9 21.2 132
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Basin Index (%) 116 143
YELLOWSTONE
Beartooth Lake 9360 33.6 23.4 144 28.9 20.8 139
Burnt Mtn 5880 .1 .0 * 15.1 14.2 106
Canyon 7870 17.7 12.2 145 26.6 17.0 156
Cole Creek 7850 11.9 16.3 73 9.5 14.5 66
Evening Star 9200 39.3 24.8 158 46.3 28.7 161
Fisher Creek 9100 45.0 32.4 139 49.2 33.3 148
Northeast Entrance 7350 3.9 6.7 58 21.1 13.0 162
Parker Peak 9400 38.0 20.9 182 35.9 18.7 192
Sylvan Lake 8420 25.0 20.4 123 38.9 23.6 165
Thumb Divide 7980 21.1 14.5 146 29.1 19.7 148
Two Ocean Plateau 9240 -M 28.1 * -M 28.5 *
White Mill 8700 38.0 23.7 160 37.3 24.9 150
Wolverine 7650 4.0 7.2 56 21.4 12.8 167
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Basin Index (%) 137 149
WIND RIVER
Burroughs Creek 8750 21.0 -M * 28.0 -M *
Castle Creek 8400 8.6 -M * 15.8 -M *
Cold Springs 9630 15.8 4.6 343 20.4 10.9 187
Deer Park 9700 33.2 16.3 204 39.3 21.5 183
Hobbs Park 10100 30.4 14.8 205 29.8 14.8 201
Kirwin 9550 22.8 10.0 228 26.1 12.4 210
Little Warm 9370 19.0 10.1 188 25.5 13.9 183
Owl Creek 8975 8.4 4.0 210 13.4 6.9 194
South Pass 9040 31.4 15.5 203 29.6 18.6 159
St. Lawrence Alt 8620 7.8 5.3 147 17.9 9.9 181
Togwotee Pass 9580 34.3 23.8 144 40.0 25.7 156
Townsend Creek 8700 17.4 9.4 185 24.2 13.3 182
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Basin Index (%) 194 180
BIGHORN BASIN
Bald Mtn. 9380 21.0 19.8 106 18.1 18.2 99
Bear Trap Meadow 8200 4.1 3.2 128 10.5 9.4 112
Bone Springs Div 9350 20.9 16.1 130 18.8 16.7 113
Grave Springs 8550 7.7 9.6 80 9.7 11.7 83
Kirwin 9550 22.8 10.0 228 26.1 12.4 210
Marquette 8760 14.2 -M * 18.2 -M *
Middle Powder 7760 9.8 12.5 78 9.2 12.8 72
Owl Creek 8975 8.4 4.0 210 13.4 6.9 194
Powder River Pass 9480 9.5 10.2 93 14.9 13.7 109
Shell Creek 9580 19.2 15.4 125 16.5 14.8 111
Timber Creek 7950 6.6 4.8 138 11.9 8.4 142
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Basin Index (%) 123 119
SHOSHONE RIVER
Blackwater 9780 39.3 23.8 165 43.5 21.8 200
Evening Star 9200 39.3 24.8 158 46.3 28.7 161
Marquette 8760 14.2 -M * 18.2 -M *
Sylvan Road 7120 .4 9.8 4 31.5 17.6 179
Younts Peak 8350 24.7 15.1 164 32.0 16.6 193
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Basin Index (%) 141 181
POWDER RIVER
Bear Trap Meadow 8200 4.1 3.2 128 10.5 9.4 112
Cloud Peak Reservoir 9860 17.2 15.8 109 20.7 14.9 139
Grave Springs 8550 7.7 9.6 80 9.7 11.7 83
Hansen Sawmill 8360 11.1 4.8 231 15.8 9.5 166
Middle Powder 7760 9.8 12.5 78 9.2 12.8 72
Powder River Pass 9480 9.5 10.2 93 14.9 13.7 109
Soldier Park 8720 14.4 -M * 15.8 -M *
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Basin Index (%) 106 112
TONGUE RIVER
Big Goose 7990 11.7 9.3 126 15.3 12.6 121
Bone Springs Div 9350 20.9 16.1 130 18.8 16.7 113
Burgess Junction 7880 11.0 12.5 88 12.9 13.4 96
Dome Lake 8880 16.7 11.8 142 17.9 14.9 120
Little Goose 8870 14.4 -M * 19.0 -M *
Sucker Creek 8880 13.4 12.7 106 15.1 15.8 96
Tie Creek 6870 .1 4.4 2 14.6 12.8 114
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Basin Index (%) 110 110
BELLE FOURCHE
Cole Canyon 5910 .0 2.0 0 8.5 10.4 82
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Basin Index (%) 0 82
CHEYENNE RIVER BASIN
Blind Park 6890 .0 4.1 0 10.3 13.1 79
North Rapid Creek 6130 .0 4.2 0 8.8 11.0 80
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Basin Index (%) 0 79
UPPER N. PLATTE
Arapaho Ridge 10960 23.9 21.4 112 26.6 24.3 109
Blackhall Mtn 9820 34.1 -M * 38.6 -M *
Columbine 9160 11.2 20.6 54 27.9 26.9 104
Divide Peak 8880 11.0 18.9 58 23.3 22.8 102
Joe Wright 10120 15.5 22.2 70 29.0 27.7 105
Laprele Creek 8375 6.4 8.0 80 12.8 13.7 93
Med Bow 10500 35.3 -M * 36.0 -M *
North French Creek 10130 23.6 32.0 74 28.3 28.6 99
Never Summer 10280 22.1 20.7 107 19.9 -M *
Old Battle 10000 36.4 32.7 111 39.0 37.0 105
Rawah 9020 4.0 8.4 48 17.5 15.5 113
Sage Creek Basin 7850 -M 6.0 * 17.0 15.3 111
Sand Lake 10050 30.0 30.5 98 28.2 26.8 105
South Brush Creek 8440 -M 9.8 * 12.9 16.5 78
Tower 10500 37.9 48.0 79 44.5 42.1 106
Webber Springs 9250 22.8 22.0 104 34.0 28.4 120
Willow Creek Pass 9540 17.9 13.1 137 18.8 14.4 131
Zirkel 9340 23.7 22.7 104 42.7 29.7 144
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Basin Index (%) 89 109
SWEETWATER
Deer Park 9700 33.2 16.3 204 39.3 21.5 183
Larsen Creek 9000 13.1 10.3 127 24.1 -M *
South Pass 9040 31.4 15.5 203 29.6 18.6 159
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Basin Index (%) 185 172
LOWER N. PLATTE
Casper Mtn. 7900 9.6 14.4 67 14.2 16.6 86
Laprele Creek 8375 6.4 8.0 80 12.8 13.7 93
Reno Hill 8400 11.8 13.9 85 15.7 17.2 91
Windy Peak 7900 3.9 6.6 59 11.8 11.6 102
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Basin Index (%) 74 92
LARAMIE RIVER
Brooklyn Lake 10240 20.4 22.2 92 23.6 22.8 104
Cinnabar Park 9574 12.5 20.1 62 22.7 25.3 90
Crow Creek 8330 .0 .7 0* 9.2 12.0 77
Deadman Hill 10220 19.6 17.0 115 21.0 18.9 111
Rawah 9020 4.0 8.4 48 17.5 15.5 113
Roach 9700 14.5 16.6 87 21.8 20.6 106
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Basin Index (%) 84 101
S. PLATTE
Black Mountain 8920 7.4 -M * 13.3 -M *
Crow Creek 8330 .0 .7 0* 9.2 12.0 77
Deadman Hill 10220 19.6 17.0 115 21.0 18.9 111
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Basin Index (%) 111* 98
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 4.3 0 16.5 16.1 102
Divide Peak 8880 11.0 18.9 58 23.3 22.8 102
Elk River 8700 6.1 15.5 39 20.6 21.3 97
Little Snake River 8915 21.2 24.3 87 39.5 31.2 127
Old Battle 10000 36.4 32.7 111 39.0 37.0 105
Sage Creek Basin 7850 -M 6.0 * 17.0 15.3 111
Sandstone RS 8150 -M 10.1 * 16.3 19.5 84
Whiskey Park 8950 21.1 25.9 81 30.9 29.6 104
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Basin Index (%) 79 105
UPPER GREEN RIVER
Big Sandy Opening 9080 21.6 12.7 170 24.2 14.1 172
Blind Bull Sum 8650 44.2 24.0 184 -M 20.2 *
East Rim Divide 7930 12.4 9.5 131 21.4 12.2 175
Elkhart Park G.S. 9400 19.9 11.9 167 25.1 14.0 179
Gros Ventre Summit 8750 -M 13.2 * -M 13.7 *
Gunsight Pass 9820 24.2 13.6 178 26.1 14.9 175
Kendall R.S. 7740 16.6 8.4 198 29.6 14.8 200
Loomis Park 8240 25.3 13.0 195 33.0 18.0 183
New Fork Lake 8340 13.3 8.8 151 18.6 11.3 165
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 15.9 10.7 149 28.1 14.8 190
Spring Creek Divide 9000 42.0 23.5 179 41.6 24.7 168
Triple Peak 8500 35.5 19.3 184 42.2 26.3 160
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Basin Index (%) 174 176
LOWER GREEN RIVER
Blacks Fork Jct 8869 5.2 -M * 16.8 -M *
Buck Pasture 9632 15.6 -M * 24.5 -M *
EF Blacks Fork GS 9360 11.6 -M * 18.6 -M *
Hams Fork 7840 11.4 6.7 170 22.4 12.0 187
Hewinta 9500 6.6 8.1 81 18.4 15.0 123
Hickerson Park 9122 5.6 5.4 104 13.5 11.0 123
Hole-in-Rock 9168 5.3 5.9 90 14.2 10.5 135
Indian Creek 9425 40.8 23.3 175 42.3 23.5 180
Kelley R.S. 8180 24.0 12.7 189 31.6 18.9 167
Spirit Lk 10235 15.1 -M * 19.4 -M *
Steel Creek Park 10158 19.7 16.2 122 22.3 17.7 126
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Basin Index (%) 145 152
UPPER BEAR RIVER
Bear River RS 8777 3.1 -M * 19.7 -M *
Bug Lake 7987 31.2 17.2 181 35.6 20.4 175
Burts Miller Ranch 8000 .0 -M * 11.0 -M *
Chalk Creek #1 9171 31.4 24.6 128 37.8 26.7 142
Hayden Fork 9130 14.3 11.8 121 30.9 22.4 138
Kelley R.S. 8180 24.0 12.7 189 31.6 18.9 167
Lily Lake 9133 11.5 10.6 108 21.1 18.3 115
Monte Cristo 8932 35.9 27.5 131 41.5 27.3 152
Salt River Summit 7760 17.8 9.7 184 29.9 17.4 172
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Basin Index (%) 146 151
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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.