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: MAY 19 , 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 8.3 .0 * 43.2 24.4 177
Black Bear 8170 45.7 34.3 133 61.6 44.6 138
Blind Bull Sum 8650 -M 20.5 * 39.5 23.1 171
Cottonwood Creek 7670 18.8 7.3 258 44.9 29.9 150
East Rim Divide 7930 .0 1.0 0* 23.4 14.1 166
Grand Targhee 9260 55.0 42.8 129 52.6 36.8 143
Granite Creek 6770 8.2 .0 * 38.7 22.9 169
Grassy Lake 7265 25.3 18.5 137 62.4 41.8 149
Gros Ventre Summit 8750 -M 6.3 * -M 16.0 *
Gunsight Pass 9820 20.4 10.9 187 29.4 17.7 166
Lewis Lake Divide 7850 35.8 23.1 155 60.0 40.9 147
Phillips Bench 8200 31.9 19.9 160 51.3 32.8 156
Salt River Summit 7760 3.6 .0 * 32.5 19.9 163
Snake River Station 6920 .0 .0 * 39.6 26.4 150
Spring Creek Divide 9000 37.7 21.0 180 45.7 28.0 163
Thumb Divide 7980 4.7 2.0 235 31.1 22.7 137
Togwotee Pass 9580 32.8 23.2 141 44.3 29.6 150
Two Ocean Plateau 9240 -M 28.5 * -M 32.7 *
Willow Creek 8380 -M 17.5 * 59.4 40.7 146
Younts Peak 8350 3.0 12.1 25 33.5 19.4 173
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Basin Index (%) 153 154
MADISON-GALLATIN
Black Bear 8170 45.7 34.3 133 61.6 44.6 138
Canyon 7870 8.9 2.8 318 29.7 19.8 150
Madison Plateau 7750 19.4 14.8 131 41.2 31.5 131
West Yellowstone 6700 .0 .0 * 26.7 17.5 153
Whiskey Creek 6800 4.5 6.3 71 30.3 24.2 125
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Basin Index (%) 135 138
YELLOWSTONE
Beartooth Lake 9360 33.9 21.9 155 32.6 24.1 135
Burnt Mtn 5880 3.0 .0 * 23.1 19.0 122
Canyon 7870 8.9 2.8 318 29.7 19.8 150
Cole Creek 7850 16.1 16.5 98 19.2 19.4 99
Evening Star 9200 35.4 24.1 147 50.7 33.2 153
Fisher Creek 9100 49.8 33.0 151 53.4 38.2 140
Northeast Entrance 7350 .0 .0 * 23.7 15.4 154
Parker Peak 9400 35.2 20.2 174 41.3 22.3 185
Sylvan Lake 8420 16.7 15.5 108 43.3 27.5 157
Thumb Divide 7980 4.7 2.0 235 31.1 22.7 137
Two Ocean Plateau 9240 -M 28.5 * -M 32.7 *
White Mill 8700 33.6 22.8 147 40.5 28.8 141
Wolverine 7650 .0 .0 * 24.7 15.4 160
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Basin Index (%) 149 145
WIND RIVER
Burroughs Creek 8750 8.7 -M * 29.4 -M *
Castle Creek 8400 .0 -M * 18.3 -M *
Cold Springs 9630 6.7 .0 * 24.2 14.3 169
Deer Park 9700 31.6 11.1 285 45.8 25.9 177
Hobbs Park 10100 31.6 13.6 232 36.4 19.2 190
Kirwin 9550 19.6 8.8 223 30.2 15.8 191
Little Warm 9370 11.8 3.4 347 27.9 17.3 161
Owl Creek 8975 .9 .0 * 16.7 9.5 176
South Pass 9040 -M 7.7 * 35.4 22.4 158
St. Lawrence Alt 8620 1.7 .0 * 22.4 13.4 167
Togwotee Pass 9580 32.8 23.2 141 44.3 29.6 150
Townsend Creek 8700 13.3 .0 * 30.1 17.0 177
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Basin Index (%) 250* 170
BIGHORN BASIN
Bald Mtn. 9380 20.6 19.6 105 22.7 22.0 103
Bear Trap Meadow 8200 .6 .0 * 16.6 12.5 133
Bone Springs Div 9350 18.0 14.6 123 22.6 20.7 109
Grave Springs 8550 5.1 3.5 146 15.1 14.9 101
Kirwin 9550 19.6 8.8 223 30.2 15.8 191
Marquette 8760 15.8 -M * 25.9 -M *
Middle Powder 7760 4.4 6.2 71 14.7 16.2 91
Owl Creek 8975 .9 .0 * 16.7 9.5 176
Powder River Pass 9480 3.7 6.0 62 18.7 17.2 109
Shell Creek 9580 14.0 15.6 90 19.1 18.4 104
Timber Creek 7950 2.3 .0 * 17.7 12.1 146
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Basin Index (%) 120 122
SHOSHONE RIVER
Blackwater 9780 39.8 24.5 162 48.1 25.8 186
Evening Star 9200 35.4 24.1 147 50.7 33.2 153
Marquette 8760 15.8 -M * 25.9 -M *
Sylvan Road 7120 .0 .0 * 33.4 20.2 165
Younts Peak 8350 3.0 12.1 25 33.5 19.4 173
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Basin Index (%) 129 168
POWDER RIVER
Bear Trap Meadow 8200 .6 .0 * 16.6 12.5 133
Cloud Peak Reservoir 9860 17.9 15.2 118 27.8 19.5 143
Grave Springs 8550 5.1 3.5 146 15.1 14.9 101
Hansen Sawmill 8360 7.1 .0 * 18.9 12.8 148
Middle Powder 7760 4.4 6.2 71 14.7 16.2 91
Powder River Pass 9480 3.7 6.0 62 18.7 17.2 109
Soldier Park 8720 8.5 -M * 22.2 -M *
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Basin Index (%) 126 120
TONGUE RIVER
Big Goose 7990 8.4 5.7 147 20.9 17.1 122
Bone Springs Div 9350 18.0 14.6 123 22.6 20.7 109
Burgess Junction 7880 6.4 8.7 74 16.4 16.9 97
Dome Lake 8880 13.8 7.0 197 24.1 19.0 127
Little Goose 8870 11.4 -M * 25.2 -M *
Sucker Creek 8880 10.5 9.2 114 20.6 20.1 102
Tie Creek 6870 2.6 .0 * 24.1 17.2 140
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Basin Index (%) 132 116
BELLE FOURCHE
Cole Canyon 5910 .1 .0 * 13.1 14.8 89
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Basin Index (%) * 89
CHEYENNE RIVER BASIN
Blind Park 6890 .2 .0 * 13.8 16.6 83
North Rapid Creek 6130 .1 .0 * 11.9 14.4 83
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Basin Index (%) * 83
UPPER N. PLATTE
Arapaho Ridge 10960 21.0 19.0 111 31.8 28.4 112
Blackhall Mtn 9820 28.5 -M * 43.6 -M *
Columbine 9160 1.2 4.0 30 33.7 30.5 110
Divide Peak 8880 .9 6.7 13 27.3 26.4 103
Joe Wright 10120 14.3 21.6 66 35.4 32.7 108
Laprele Creek 8375 1.1 .0 * 16.8 16.8 100
Med Bow 10500 35.4 -M * 42.1 -M *
North French Creek 10130 21.5 30.2 71 35.1 33.6 104
Never Summer 10280 21.0 20.8 101 23.9 -M *
Old Battle 10000 36.7 32.9 112 43.9 42.0 105
Rawah 9020 .8 .6 133* 21.3 18.9 113
Sage Creek Basin 7850 .5 .0 * 18.8 17.3 109
Sand Lake 10050 30.5 28.3 108 33.5 31.8 105
South Brush Creek 8440 .0 .4 0* 15.8 20.0 79
Tower 10500 39.5 48.2 82 53.5 47.7 112
Webber Springs 9250 11.5 13.0 88 38.7 32.0 121
Willow Creek Pass 9540 12.3 9.8 126 22.0 17.3 127
Zirkel 9340 -M 11.4 * 49.0 33.3 147
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Basin Index (%) 90 111
SWEETWATER
Deer Park 9700 31.6 11.1 285 45.8 25.9 177
Larsen Creek 9000 .9 3.9 23 27.4 -M *
South Pass 9040 -M 7.7 * 35.4 22.4 158
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Basin Index (%) 217 168
LOWER N. PLATTE
Casper Mtn. 7900 1.9 5.4 35 20.7 20.3 102
Laprele Creek 8375 1.1 .0 * 16.8 16.8 100
Reno Hill 8400 1.9 4.6 41 20.6 21.3 97
Windy Peak 7900 2.0 .0 * 17.4 14.7 118
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Basin Index (%) 69 103
LARAMIE RIVER
Brooklyn Lake 10240 12.5 17.2 73 28.0 27.1 103
Cinnabar Park 9574 6.4 13.1 49 28.7 29.5 97
Crow Creek 8330 -M .0 * 15.0 15.1 99
Deadman Hill 10220 15.9 17.1 93 27.5 22.9 120
Rawah 9020 .8 .6 133* 21.3 18.9 113
Roach 9700 9.1 12.1 75 27.5 24.5 112
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Basin Index (%) 74 107
S. PLATTE
Black Mountain 8920 -M -M * 19.6 -M *
Crow Creek 8330 -M .0 * 15.0 15.1 99
Deadman Hill 10220 15.9 17.1 93 27.5 22.9 120
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Basin Index (%) 93* 112
LITTLE SNAKE RIVER
Battle Mountain 7440 .2 .0 * 20.4 18.6 110
Divide Peak 8880 .9 6.7 13 27.3 26.4 103
Elk River 8700 .9 .0 * 24.4 24.5 100
Little Snake River 8915 12.0 14.4 83 44.6 35.0 127
Old Battle 10000 36.7 32.9 112 43.9 42.0 105
Sage Creek Basin 7850 .5 .0 * 18.8 17.3 109
Sandstone RS 8150 .1 .0 * 19.1 22.4 85
Whiskey Park 8950 17.9 22.6 79 36.9 33.8 109
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Basin Index (%) 90 107
UPPER GREEN RIVER
Big Sandy Opening 9080 13.3 4.2 317 26.8 16.8 160
Blind Bull Sum 8650 -M 20.5 * 39.5 23.1 171
East Rim Divide 7930 .0 1.0 0* 23.4 14.1 166
Elkhart Park G.S. 9400 12.6 6.2 203 27.5 16.7 165
Gros Ventre Summit 8750 -M 6.3 * -M 16.0 *
Gunsight Pass 9820 20.4 10.9 187 29.4 17.7 166
Kendall R.S. 7740 .0 .0 * 31.7 16.7 190
Loomis Park 8240 14.4 3.3 436 35.4 20.5 173
New Fork Lake 8340 .0 .0 * 21.3 13.5 158
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 .0 .8 0* 29.5 16.8 176
Spring Creek Divide 9000 37.7 21.0 180 45.7 28.0 163
Triple Peak 8500 23.9 9.5 252 45.3 30.1 150
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Basin Index (%) 215* 166
LOWER GREEN RIVER
Blacks Fork Jct 8869 .0 -M * 19.6 -M *
Buck Pasture 9632 4.9 -M * 28.2 -M *
EF Blacks Fork GS 9360 -M -M * 23.6 -M *
Hams Fork 7840 .0 .0 * 24.7 14.3 173
Hewinta 9500 .0 .0 * 21.6 17.7 122
Hickerson Park 9122 .9 .0 * 16.0 13.4 119
Hole-in-Rock 9168 .1 .0 * 16.6 13.0 128
Indian Creek 9425 35.2 19.3 182 46.4 27.0 172
Kelley R.S. 8180 8.0 3.5 229 35.2 21.7 162
Spirit Lk 10235 4.2 -M * 22.1 -M *
Steel Creek Park 10158 16.1 15.2 106 26.2 21.0 125
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Basin Index (%) 159* 146
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 21.9 -M *
Bug Lake 7987 20.3 6.1 333 38.8 23.4 166
Burts Miller Ranch 8000 .0 -M * 12.1 -M *
Chalk Creek #1 9171 24.0 16.4 146 42.1 30.8 137
Hayden Fork 9130 .3 .0 * 33.1 25.7 129
Kelley R.S. 8180 8.0 3.5 229 35.2 21.7 162
Lily Lake 9133 .1 .0 * 23.5 21.3 110
Monte Cristo 8932 28.2 15.8 178 46.3 31.5 147
Salt River Summit 7760 3.6 .0 * 32.5 19.9 163
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Basin Index (%) 202* 144
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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.