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: MAY 25 , 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 3.6 .0 * 43.2 25.0 173
Black Bear 8170 42.8 31.2 137 61.7 45.3 136
Blind Bull Sum 8650 -M 17.1 * 39.7 23.7 168
Cottonwood Creek 7670 14.3 1.4 1021* 45.8 30.6 150
East Rim Divide 7930 .1 .0 * 23.5 14.5 162
Grand Targhee 9260 54.3 41.2 132 53.0 38.0 139
Granite Creek 6770 .8 .0 * 38.7 23.4 165
Grassy Lake 7265 19.8 12.2 162 62.5 42.6 147
Gros Ventre Summit 8750 10.4 2.2 473 27.2 16.5 165
Gunsight Pass 9820 18.8 7.3 258 29.7 18.1 164
Lewis Lake Divide 7850 30.1 18.5 163 60.1 41.7 144
Phillips Bench 8200 27.3 15.2 180 51.3 33.4 154
Salt River Summit 7760 .2 .0 * 32.8 20.3 162
Snake River Station 6920 .0 .0 * 39.6 27.1 146
Spring Creek Divide 9000 35.2 16.7 211 46.1 28.6 161
Thumb Divide 7980 .3 .0 * 31.2 23.2 134
Togwotee Pass 9580 31.3 22.4 140 44.5 30.3 147
Two Ocean Plateau 9240 -M 27.7 * -M 33.5 *
Willow Creek 8380 -M 11.1 * 59.5 41.6 143
Younts Peak 8350 .0 9.6 0 34.0 20.0 170
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Basin Index (%) 163 152
MADISON-GALLATIN
Black Bear 8170 42.8 31.2 137 61.7 45.3 136
Canyon 7870 4.0 .4 1000* 29.8 20.3 147
Madison Plateau 7750 15.7 12.0 131 41.3 32.2 128
West Yellowstone 6700 .0 .0 * 26.8 18.0 149
Whiskey Creek 6800 .0 2.4 0 31.3 24.9 126
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Basin Index (%) 136 136
YELLOWSTONE
Beartooth Lake 9360 32.4 20.4 159 33.2 24.6 135
Burnt Mtn 5880 .0 .0 * 23.6 20.0 118
Canyon 7870 4.0 .4 1000* 29.8 20.3 147
Cole Creek 7850 14.4 13.6 106 19.3 20.2 96
Evening Star 9200 34.3 21.8 157 51.0 34.1 150
Fisher Creek 9100 45.9 31.2 147 53.7 39.1 137
Northeast Entrance 7350 .0 .0 * 23.8 16.0 149
Parker Peak 9400 32.6 18.5 176 41.3 23.0 180
Sylvan Lake 8420 13.2 12.6 105 43.5 28.3 154
Thumb Divide 7980 .3 .0 * 31.2 23.2 134
Two Ocean Plateau 9240 -M 27.7 * -M 33.5 *
White Mill 8700 29.6 20.9 142 40.7 29.5 138
Wolverine 7650 -M .0 * 24.6 15.9 155
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Basin Index (%) 148 141
WIND RIVER
Burroughs Creek 8750 4.1 -M * 29.9 -M *
Castle Creek 8400 .0 -M * 18.7 -M *
Cold Springs 9630 4.7 .0 * 24.5 14.8 166
Deer Park 9700 31.7 8.1 391 47.2 26.6 177
Hobbs Park 10100 31.1 10.7 291 37.7 19.8 190
Kirwin 9550 18.0 6.0 300 30.8 16.3 189
Little Warm 9370 9.6 .4 2400* 28.1 17.9 157
Owl Creek 8975 .0 .0 * 17.1 10.1 169
South Pass 9040 28.1 2.6 1081 36.7 22.9 160
St. Lawrence Alt 8620 .1 .0 * 22.9 13.9 165
Togwotee Pass 9580 31.3 22.4 140 44.5 30.3 147
Townsend Creek 8700 11.9 .0 * 31.3 17.6 178
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Basin Index (%) 332* 169
BIGHORN BASIN
Bald Mtn. 9380 19.9 17.2 116 23.2 22.8 102
Bear Trap Meadow 8200 .0 .0 * 17.3 13.3 130
Bone Springs Div 9350 17.2 12.6 137 23.3 21.6 108
Grave Springs 8550 2.6 .0 * 16.1 15.6 103
Kirwin 9550 18.0 6.0 300 30.8 16.3 189
Marquette 8760 14.5 -M * 26.4 -M *
Middle Powder 7760 .6 .8 75* 16.2 16.8 96
Owl Creek 8975 .0 .0 * 17.1 10.1 169
Powder River Pass 9480 1.3 2.0 65 19.1 18.1 106
Shell Creek 9580 13.4 13.7 98 19.5 19.2 102
Timber Creek 7950 .1 .0 * 18.2 12.8 142
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Basin Index (%) 140* 121
SHOSHONE RIVER
Blackwater 9780 35.9 23.1 155 48.2 26.7 181
Evening Star 9200 34.3 21.8 157 51.0 34.1 150
Marquette 8760 14.5 -M * 26.4 -M *
Sylvan Road 7120 .0 .0 * 33.1 20.8 159
Younts Peak 8350 .0 9.6 0 34.0 20.0 170
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Basin Index (%) 129 164
POWDER RIVER
Bear Trap Meadow 8200 .0 .0 * 17.3 13.3 130
Cloud Peak Reservoir 9860 17.6 12.0 147 28.7 20.4 141
Grave Springs 8550 2.6 .0 * 16.1 15.6 103
Hansen Sawmill 8360 4.2 .0 * 18.7 13.6 138
Middle Powder 7760 .6 .8 75* 16.2 16.8 96
Powder River Pass 9480 1.3 2.0 65 19.1 18.1 106
Soldier Park 8720 5.7 -M * 22.5 -M *
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Basin Index (%) 178* 119
TONGUE RIVER
Big Goose 7990 6.6 .9 733* 21.6 17.8 121
Bone Springs Div 9350 17.2 12.6 137 23.3 21.6 108
Burgess Junction 7880 4.4 4.7 94 17.9 17.6 102
Dome Lake 8880 13.1 2.4 546 24.7 19.7 125
Little Goose 8870 10.1 -M * 25.8 -M *
Sucker Creek 8880 9.8 5.5 178 21.0 20.9 100
Tie Creek 6870 .1 .0 * 24.5 18.1 135
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Basin Index (%) 196 115
BELLE FOURCHE
Cole Canyon 5910 .0 .0 * 14.1 15.6 90
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Basin Index (%) * 90
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 14.7 17.6 84
North Rapid Creek 6130 .0 .0 * 13.0 15.1 86
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Basin Index (%) * 85
UPPER N. PLATTE
Arapaho Ridge 10960 21.0 13.8 152 32.7 28.9 113
Blackhall Mtn 9820 29.1 -M * 44.7 -M *
Columbine 9160 .0 .0 * 34.8 30.9 113
Divide Peak 8880 .0 1.3 0* 28.2 26.8 105
Joe Wright 10120 15.3 18.5 83 36.9 33.4 110
Laprele Creek 8375 .3 .0 * 18.0 17.4 103
Med Bow 10500 35.8 -M * 43.3 -M *
North French Creek 10130 22.2 26.2 85 36.1 34.3 105
Never Summer 10280 22.1 18.0 123 25.1 -M *
Old Battle 10000 37.5 30.0 125 45.9 42.7 107
Rawah 9020 .2 .0 * 22.4 19.1 117
Sage Creek Basin 7850 -M .0 * 19.1 17.7 108
Sand Lake 10050 31.5 25.2 125 34.7 32.4 107
South Brush Creek 8440 .0 .0 * 17.5 20.5 85
Tower 10500 41.6 44.8 93 54.9 48.4 113
Webber Springs 9250 11.0 6.5 169 39.6 32.4 122
Willow Creek Pass 9540 11.6 5.8 200 22.8 17.8 128
Zirkel 9340 8.8 1.9 463* 49.8 33.7 148
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Basin Index (%) 116 113
SWEETWATER
Deer Park 9700 31.7 8.1 391 47.2 26.6 177
Larsen Creek 9000 .3 2.1 14 28.0 -M *
South Pass 9040 28.1 2.6 1081 36.7 22.9 160
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Basin Index (%) 470 169
LOWER N. PLATTE
Casper Mtn. 7900 .7 1.1 64* 22.0 21.0 105
Laprele Creek 8375 .3 .0 * 18.0 17.4 103
Reno Hill 8400 .8 .0 * 22.4 22.0 102
Windy Peak 7900 .1 .0 * 18.4 15.4 119
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Basin Index (%) 173* 107
LARAMIE RIVER
Brooklyn Lake 10240 12.7 11.9 107 29.4 27.7 106
Cinnabar Park 9574 5.7 7.5 76 29.2 29.9 98
Crow Creek 8330 .0 .0 * 15.8 15.7 101
Deadman Hill 10220 16.3 13.3 123 28.8 23.4 123
Rawah 9020 .2 .0 * 22.4 19.1 117
Roach 9700 8.5 7.4 115 28.4 25.1 113
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Basin Index (%) 108 109
S. PLATTE
Black Mountain 8920 .9 -M * 20.7 -M *
Crow Creek 8330 .0 .0 * 15.8 15.7 101
Deadman Hill 10220 16.3 13.3 123 28.8 23.4 123
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Basin Index (%) 123* 114
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * 20.6 18.9 109
Divide Peak 8880 .0 1.3 0* 28.2 26.8 105
Elk River 8700 .1 .0 * 24.4 24.9 98
Little Snake River 8915 10.3 7.8 132 45.4 35.7 127
Old Battle 10000 37.5 30.0 125 45.9 42.7 107
Sage Creek Basin 7850 -M .0 * 19.1 17.7 108
Sandstone RS 8150 .0 .0 * 19.8 22.8 87
Whiskey Park 8950 13.4 16.1 83 37.3 34.2 109
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Basin Index (%) 111* 108
UPPER GREEN RIVER
Big Sandy Opening 9080 10.6 .0 * 27.4 17.3 158
Blind Bull Sum 8650 -M 17.1 * 39.7 23.7 168
East Rim Divide 7930 .1 .0 * 23.5 14.5 162
Elkhart Park G.S. 9400 9.8 3.2 306 27.6 17.2 160
Gros Ventre Summit 8750 10.4 2.2 473 27.2 16.5 165
Gunsight Pass 9820 18.8 7.3 258 29.7 18.1 164
Kendall R.S. 7740 .0 .0 * 31.8 17.1 186
Loomis Park 8240 9.8 .0 * 35.4 21.0 169
New Fork Lake 8340 -M .0 * 22.3 13.9 160
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 .0 .0 * 29.9 17.1 175
Spring Creek Divide 9000 35.2 16.7 211 46.1 28.6 161
Triple Peak 8500 19.9 3.5 569 45.8 30.8 149
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Basin Index (%) 348* 164
LOWER GREEN RIVER
Blacks Fork Jct 8869 .1 -M * 19.7 -M *
Buck Pasture 9632 1.0 -M * 28.4 -M *
EF Blacks Fork GS 9360 -M -M * 23.8 -M *
Hams Fork 7840 .1 .0 * 24.9 14.8 168
Hewinta 9500 .0 .0 * 22.1 18.1 122
Hickerson Park 9122 .1 .0 * 16.3 13.9 117
Hole-in-Rock 9168 .0 .0 * 17.1 13.5 127
Indian Creek 9425 33.6 14.9 226 46.9 27.5 171
Kelley R.S. 8180 3.0 .0 * 35.5 22.3 159
Spirit Lk 10235 1.9 -M * 22.6 -M *
Steel Creek Park 10158 14.5 12.2 119 26.6 21.4 124
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Basin Index (%) 189* 144
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 22.2 -M *
Bug Lake 7987 15.0 .0 * 39.1 23.9 164
Burts Miller Ranch 8000 .0 -M * 12.4 -M *
Chalk Creek #1 9171 19.2 11.1 173 42.4 31.4 135
Hayden Fork 9130 .1 .0 * 33.2 26.3 126
Kelley R.S. 8180 3.0 .0 * 35.5 22.3 159
Lily Lake 9133 .0 .0 * 24.0 21.8 110
Monte Cristo 8932 24.3 9.6 253 46.4 32.1 145
Salt River Summit 7760 .2 .0 * 32.8 20.3 162
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Basin Index (%) 299* 142
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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.