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 FRIDAY: APRIL 21 , 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 21.1 11.7 180 40.5 21.8 186
Black Bear 8170 48.1 36.9 130 56.4 40.0 141
Blind Bull Sum 8650 44.7 24.1 185 -M 20.3 *
Cottonwood Creek 7670 27.4 18.3 150 40.3 26.0 155
East Rim Divide 7930 11.7 9.4 124 21.5 12.3 175
Grand Targhee 9260 51.0 42.2 121 45.3 32.8 138
Granite Creek 6770 22.6 10.5 215 36.9 20.4 181
Grassy Lake 7265 37.3 31.1 120 57.7 37.6 153
Gros Ventre Summit 8750 -M 13.2 * -M 13.8 *
Gunsight Pass 9820 24.0 13.7 175 26.3 15.0 175
Lewis Lake Divide 7850 46.6 30.5 153 57.5 37.0 155
Phillips Bench 8200 38.9 25.4 153 48.1 29.3 164
Salt River Summit 7760 17.5 9.4 186 30.1 17.4 173
Snake River Station 6920 14.8 11.1 133 37.3 23.6 158
Spring Creek Divide 9000 42.2 23.5 180 41.7 24.9 167
Thumb Divide 7980 20.7 14.4 144 29.1 19.8 147
Togwotee Pass 9580 34.5 24.0 144 40.3 25.8 156
Two Ocean Plateau 9240 -M 28.3 * -M 28.7 *
Willow Creek 8380 27.8 26.7 104 52.8 35.4 149
Younts Peak 8350 24.7 15.2 162 32.2 16.7 193
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Basin Index (%) 147 159
MADISON-GALLATIN
Black Bear 8170 48.1 36.9 130 56.4 40.0 141
Canyon 7870 17.5 12.2 143 26.6 17.1 156
Madison Plateau 7750 28.2 22.9 123 37.9 27.6 137
West Yellowstone 6700 1.9 7.0 27 24.1 15.2 159
Whiskey Creek 6800 12.5 15.4 81 27.9 21.3 131
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Basin Index (%) 115 143
YELLOWSTONE
Beartooth Lake 9360 33.7 23.5 143 28.9 20.8 139
Burnt Mtn 5880 .1 .0 * 15.1 14.4 105
Canyon 7870 17.5 12.2 143 26.6 17.1 156
Cole Creek 7850 11.7 16.4 71 9.5 14.7 65
Evening Star 9200 39.5 24.7 160 46.5 28.9 161
Fisher Creek 9100 45.1 32.6 138 49.2 33.5 147
Northeast Entrance 7350 3.4 6.4 53 21.3 13.0 164
Parker Peak 9400 38.4 21.1 182 36.4 18.8 194
Sylvan Lake 8420 25.0 20.4 123 39.3 23.7 166
Thumb Divide 7980 20.7 14.4 144 29.1 19.8 147
Two Ocean Plateau 9240 -M 28.3 * -M 28.7 *
White Mill 8700 38.4 23.7 162 37.4 25.0 150
Wolverine 7650 2.9 6.9 42 21.7 12.9 168
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Basin Index (%) 137 149
WIND RIVER
Burroughs Creek 8750 20.8 -M * 28.2 -M *
Castle Creek 8400 8.4 -M * 16.9 -M *
Cold Springs 9630 15.7 4.3 365 20.5 11.0 186
Deer Park 9700 33.2 16.3 204 39.4 21.7 182
Hobbs Park 10100 30.7 14.9 206 29.9 14.9 201
Kirwin 9550 23.7 10.0 237 26.5 12.5 212
Little Warm 9370 18.7 10.0 187 25.6 14.0 183
Owl Creek 8975 8.2 3.7 222 13.7 6.9 199
South Pass 9040 31.3 15.4 203 29.7 18.7 159
St. Lawrence Alt 8620 7.9 5.2 152 18.1 10.0 181
Togwotee Pass 9580 34.5 24.0 144 40.3 25.8 156
Townsend Creek 8700 17.3 9.3 186 24.3 13.4 181
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Basin Index (%) 196 180
BIGHORN BASIN
Bald Mtn. 9380 20.7 19.9 104 18.2 18.3 99
Bear Trap Meadow 8200 4.0 2.9 138 10.6 9.5 112
Bone Springs Div 9350 20.8 16.1 129 19.0 16.9 112
Grave Springs 8550 7.9 9.5 83 9.8 11.8 83
Kirwin 9550 23.7 10.0 237 26.5 12.5 212
Marquette 8760 14.5 -M * 18.4 -M *
Middle Powder 7760 9.7 12.4 78 9.5 12.9 74
Owl Creek 8975 8.2 3.7 222 13.7 6.9 199
Powder River Pass 9480 9.3 10.2 91 15.0 13.8 109
Shell Creek 9580 19.2 15.4 125 16.6 14.9 111
Timber Creek 7950 6.4 4.6 139 12.2 8.5 144
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Basin Index (%) 124 120
SHOSHONE RIVER
Blackwater 9780 39.6 23.8 166 43.5 21.9 199
Evening Star 9200 39.5 24.7 160 46.5 28.9 161
Marquette 8760 14.5 -M * 18.4 -M *
Sylvan Road 7120 .0 9.5 0 31.5 17.7 178
Younts Peak 8350 24.7 15.2 162 32.2 16.7 193
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Basin Index (%) 142 180
POWDER RIVER
Bear Trap Meadow 8200 4.0 2.9 138 10.6 9.5 112
Cloud Peak Reservoir 9860 17.2 15.9 108 20.7 15.0 138
Grave Springs 8550 7.9 9.5 83 9.8 11.8 83
Hansen Sawmill 8360 10.8 4.6 235 16.0 9.7 165
Middle Powder 7760 9.7 12.4 78 9.5 12.9 74
Powder River Pass 9480 9.3 10.2 91 15.0 13.8 109
Soldier Park 8720 14.2 -M * 15.9 -M *
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Basin Index (%) 106 112
TONGUE RIVER
Big Goose 7990 11.6 9.2 126 15.4 12.8 120
Bone Springs Div 9350 20.8 16.1 129 19.0 16.9 112
Burgess Junction 7880 11.0 12.6 87 12.9 13.6 95
Dome Lake 8880 16.6 11.8 141 18.0 15.0 120
Little Goose 8870 14.3 -M * 19.0 -M *
Sucker Creek 8880 13.3 12.7 105 15.2 15.9 96
Tie Creek 6870 .1 4.2 2 14.6 13.0 112
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Basin Index (%) 110 109
BELLE FOURCHE
Cole Canyon 5910 .0 1.8 0 8.7 10.5 83
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Basin Index (%) 0 83
CHEYENNE RIVER BASIN
Blind Park 6890 .0 4.0 0 10.4 13.2 79
North Rapid Creek 6130 .0 4.0 0 8.9 11.2 79
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Basin Index (%) 0 79
UPPER N. PLATTE
Arapaho Ridge 10960 24.4 21.3 115 27.4 24.4 112
Blackhall Mtn 9820 34.3 -M * 38.8 -M *
Columbine 9160 10.9 20.6 53 28.4 27.0 105
Divide Peak 8880 10.9 18.6 59 23.5 22.9 103
Joe Wright 10120 16.0 22.4 71 29.5 27.9 106
Laprele Creek 8375 6.2 7.8 79 13.0 13.8 94
Med Bow 10500 35.3 -M * 36.3 -M *
North French Creek 10130 23.6 32.0 74 28.5 28.7 99
Never Summer 10280 22.6 20.7 109 20.4 -M *
Old Battle 10000 36.5 32.9 111 39.1 37.2 105
Rawah 9020 4.2 8.3 51 17.8 15.6 114
Sage Creek Basin 7850 -M 5.4 * 17.0 15.3 111
Sand Lake 10050 29.8 30.6 97 28.2 27.0 104
South Brush Creek 8440 -M 9.7 * 13.0 16.5 79
Tower 10500 39.0 48.2 81 44.8 42.3 106
Webber Springs 9250 22.1 21.8 101 34.1 28.5 120
Willow Creek Pass 9540 18.1 13.3 136 19.2 14.5 132
Zirkel 9340 23.2 22.6 103 43.1 29.8 145
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Basin Index (%) 90 109
SWEETWATER
Deer Park 9700 33.2 16.3 204 39.4 21.7 182
Larsen Creek 9000 12.6 10.2 124 24.3 -M *
South Pass 9040 31.3 15.4 203 29.7 18.7 159
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Basin Index (%) 184 171
LOWER N. PLATTE
Casper Mtn. 7900 9.6 14.4 67 14.2 16.7 85
Laprele Creek 8375 6.2 7.8 79 13.0 13.8 94
Reno Hill 8400 11.7 14.0 84 15.8 17.3 91
Windy Peak 7900 3.6 6.5 55 11.9 11.7 102
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Basin Index (%) 73 92
LARAMIE RIVER
Brooklyn Lake 10240 19.5 22.3 87 23.6 22.9 103
Cinnabar Park 9574 12.5 20.0 62 23.1 25.4 91
Crow Creek 8330 .3 .3 100* 9.7 12.0 81
Deadman Hill 10220 19.6 17.2 114 21.4 19.0 113
Rawah 9020 4.2 8.3 51 17.8 15.6 114
Roach 9700 14.6 16.6 88 22.1 20.7 107
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Basin Index (%) 83 102
S. PLATTE
Black Mountain 8920 7.5 -M * 13.9 -M *
Crow Creek 8330 .3 .3 100* 9.7 12.0 81
Deadman Hill 10220 19.6 17.2 114 21.4 19.0 113
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Basin Index (%) 114* 100
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 3.9 0 17.5 16.1 109
Divide Peak 8880 10.9 18.6 59 23.5 22.9 103
Elk River 8700 5.1 15.2 34 20.8 21.4 97
Little Snake River 8915 21.3 24.1 88 39.9 31.2 128
Old Battle 10000 36.5 32.9 111 39.1 37.2 105
Sage Creek Basin 7850 -M 5.4 * 17.0 15.3 111
Sandstone RS 8150 -M 10.0 * 16.3 19.6 83
Whiskey Park 8950 21.7 25.8 84 31.3 29.7 105
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Basin Index (%) 79 106
UPPER GREEN RIVER
Big Sandy Opening 9080 21.7 12.6 172 24.3 14.2 171
Blind Bull Sum 8650 44.7 24.1 185 -M 20.3 *
East Rim Divide 7930 11.7 9.4 124 21.5 12.3 175
Elkhart Park G.S. 9400 19.9 11.9 167 25.2 14.1 179
Gros Ventre Summit 8750 -M 13.2 * -M 13.8 *
Gunsight Pass 9820 24.0 13.7 175 26.3 15.0 175
Kendall R.S. 7740 16.3 8.1 201 29.8 14.8 201
Loomis Park 8240 24.6 12.8 192 33.0 18.0 183
New Fork Lake 8340 12.8 8.6 149 18.7 11.3 165
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 16.2 10.6 153 28.1 14.8 190
Spring Creek Divide 9000 42.2 23.5 180 41.7 24.9 167
Triple Peak 8500 35.3 19.2 184 42.2 26.5 159
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Basin Index (%) 174 175
LOWER GREEN RIVER
Blacks Fork Jct 8869 5.0 -M * 17.2 -M *
Buck Pasture 9632 15.3 -M * 24.8 -M *
EF Blacks Fork GS 9360 11.8 -M * 19.0 -M *
Hams Fork 7840 10.5 6.4 164 22.6 12.1 187
Hewinta 9500 6.8 7.9 86 18.9 15.0 126
Hickerson Park 9122 5.5 5.3 104 13.7 11.1 123
Hole-in-Rock 9168 5.5 5.7 96 14.5 10.6 137
Indian Creek 9425 41.0 23.4 175 42.7 23.7 180
Kelley R.S. 8180 23.8 12.4 192 31.9 19.0 168
Spirit Lk 10235 15.1 -M * 19.6 -M *
Steel Creek Park 10158 20.3 16.2 125 22.8 17.8 128
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Basin Index (%) 147 153
UPPER BEAR RIVER
Bear River RS 8777 2.8 -M * 19.9 -M *
Bug Lake 7987 31.6 16.9 187 35.7 20.5 174
Burts Miller Ranch 8000 .0 -M * 11.1 -M *
Chalk Creek #1 9171 31.9 24.5 130 38.3 26.9 142
Hayden Fork 9130 14.6 11.4 128 31.4 22.5 140
Kelley R.S. 8180 23.8 12.4 192 31.9 19.0 168
Lily Lake 9133 11.8 10.4 113 21.4 18.4 116
Monte Cristo 8932 36.1 27.4 132 41.7 27.5 152
Salt River Summit 7760 17.5 9.4 186 30.1 17.4 173
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Basin Index (%) 149 151
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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.