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 26 , 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 3.0 .0 * 43.2 25.1 172
Black Bear 8170 41.8 30.6 137 61.7 45.5 136
Blind Bull Sum 8650 -M 16.5 * 39.6 23.8 166
Cottonwood Creek 7670 13.3 .7 1900* 45.7 30.7 149
East Rim Divide 7930 .0 .0 * 23.5 14.6 161
Grand Targhee 9260 52.5 41.2 127 52.9 38.1 139
Granite Creek 6770 .1 .0 * 38.8 23.5 165
Grassy Lake 7265 18.9 11.2 169 62.5 42.8 146
Gros Ventre Summit 8750 -M 1.6 * -M 16.5 *
Gunsight Pass 9820 18.9 6.5 291 29.6 18.2 163
Lewis Lake Divide 7850 29.3 17.6 166 60.2 41.8 144
Phillips Bench 8200 26.1 14.4 181 51.3 33.5 153
Salt River Summit 7760 .0 .0 * 32.8 20.4 161
Snake River Station 6920 .0 .0 * 39.6 27.1 146
Spring Creek Divide 9000 34.4 15.9 216 46.3 28.7 161
Thumb Divide 7980 .2 .0 * 31.2 23.3 134
Togwotee Pass 9580 30.7 22.2 138 44.5 30.4 146
Two Ocean Plateau 9240 -M 27.6 * -M 33.6 *
Willow Creek 8380 -M 9.8 * 59.5 41.8 142
Younts Peak 8350 .0 9.1 0 34.0 20.1 169
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Basin Index (%) 159* 151
MADISON-GALLATIN
Black Bear 8170 41.8 30.6 137 61.7 45.5 136
Canyon 7870 3.4 .0 * 29.8 20.4 146
Madison Plateau 7750 14.8 11.4 130 41.4 32.3 128
West Yellowstone 6700 .0 .0 * 26.8 18.0 149
Whiskey Creek 6800 .0 1.9 0 31.2 25.0 125
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Basin Index (%) 137 135
YELLOWSTONE
Beartooth Lake 9360 32.1 20.1 160 33.2 24.7 134
Burnt Mtn 5880 .0 .0 * 23.7 20.1 118
Canyon 7870 3.4 .0 * 29.8 20.4 146
Cole Creek 7850 14.4 13.1 110 19.3 20.4 95
Evening Star 9200 33.6 21.4 157 51.0 34.2 149
Fisher Creek 9100 46.0 30.7 150 53.7 39.2 137
Northeast Entrance 7350 .0 .0 * 23.8 16.1 148
Parker Peak 9400 32.0 18.1 177 41.4 23.1 179
Sylvan Lake 8420 12.6 12.1 104 43.5 28.4 153
Thumb Divide 7980 .2 .0 * 31.2 23.3 134
Two Ocean Plateau 9240 -M 27.6 * -M 33.6 *
White Mill 8700 29.3 20.5 143 40.7 29.6 138
Wolverine 7650 -M .0 * 24.7 16.0 154
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Basin Index (%) 150 141
WIND RIVER
Burroughs Creek 8750 3.5 -M * 29.8 -M *
Castle Creek 8400 .0 -M * 18.8 -M *
Cold Springs 9630 3.6 .0 * 24.5 14.9 164
Deer Park 9700 31.8 7.6 418 47.2 26.7 177
Hobbs Park 10100 30.5 10.2 299 37.9 19.9 190
Kirwin 9550 17.7 5.5 322 30.9 16.4 188
Little Warm 9370 8.9 .1 8900* 28.1 17.9 157
Owl Creek 8975 .0 .0 * 17.1 10.2 168
South Pass 9040 27.1 2.0 1355 37.0 23.1 160
St. Lawrence Alt 8620 .1 .0 * 23.0 13.9 165
Togwotee Pass 9580 30.7 22.2 138 44.5 30.4 146
Townsend Creek 8700 11.0 .0 * 31.4 17.7 177
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Basin Index (%) 339* 168
BIGHORN BASIN
Bald Mtn. 9380 19.8 16.8 118 23.1 22.9 101
Bear Trap Meadow 8200 .0 .0 * 17.2 13.4 128
Bone Springs Div 9350 16.5 12.2 135 23.2 21.7 107
Grave Springs 8550 1.6 .0 * 15.9 15.7 101
Kirwin 9550 17.7 5.5 322 30.9 16.4 188
Marquette 8760 14.3 -M * 26.5 -M *
Middle Powder 7760 .0 .5 0* 15.7 16.9 93
Owl Creek 8975 .0 .0 * 17.1 10.2 168
Powder River Pass 9480 .7 1.4 50 19.1 18.1 106
Shell Creek 9580 13.1 13.2 99 19.6 19.3 102
Timber Creek 7950 .4 .0 * 18.5 12.9 143
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Basin Index (%) 141* 120
SHOSHONE RIVER
Blackwater 9780 36.0 22.9 157 48.2 26.8 180
Evening Star 9200 33.6 21.4 157 51.0 34.2 149
Marquette 8760 14.3 -M * 26.5 -M *
Sylvan Road 7120 .0 .0 * 33.3 20.8 160
Younts Peak 8350 .0 9.1 0 34.0 20.1 169
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Basin Index (%) 130 163
POWDER RIVER
Bear Trap Meadow 8200 .0 .0 * 17.2 13.4 128
Cloud Peak Reservoir 9860 17.1 11.2 153 28.7 20.5 140
Grave Springs 8550 1.6 .0 * 15.9 15.7 101
Hansen Sawmill 8360 3.4 .0 * -M 13.6 *
Middle Powder 7760 .0 .5 0* 15.7 16.9 93
Powder River Pass 9480 .7 1.4 50 19.1 18.1 106
Soldier Park 8720 5.1 -M * 22.5 -M *
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Basin Index (%) 174* 114
TONGUE RIVER
Big Goose 7990 6.1 .2 3050* 21.6 17.9 121
Bone Springs Div 9350 16.5 12.2 135 23.2 21.7 107
Burgess Junction 7880 4.1 3.8 108 17.6 17.6 100
Dome Lake 8880 12.5 1.7 735 24.6 19.8 124
Little Goose 8870 9.8 -M * 25.8 -M *
Sucker Creek 8880 9.6 4.8 200 21.0 21.0 100
Tie Creek 6870 .1 .0 * 24.5 18.1 135
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Basin Index (%) 215 114
BELLE FOURCHE
Cole Canyon 5910 .0 .0 * 14.3 15.8 91
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Basin Index (%) * 91
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 14.7 17.7 83
North Rapid Creek 6130 -M .0 * 12.9 15.3 84
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Basin Index (%) * 84
UPPER N. PLATTE
Arapaho Ridge 10960 21.1 12.9 164 33.1 28.9 115
Blackhall Mtn 9820 28.7 -M * 44.7 -M *
Columbine 9160 .0 .0 * 35.1 31.0 113
Divide Peak 8880 .0 .6 0* 28.1 26.9 104
Joe Wright 10120 15.1 17.9 84 37.4 33.5 112
Laprele Creek 8375 .2 .0 * 17.8 17.4 102
Med Bow 10500 35.8 -M * 43.5 -M *
North French Creek 10130 22.0 25.5 86 36.3 34.4 106
Never Summer 10280 22.1 17.6 126 25.6 -M *
Old Battle 10000 37.0 29.1 127 45.8 42.9 107
Rawah 9020 .2 .0 * 22.5 19.2 117
Sage Creek Basin 7850 -M .0 * 19.2 17.7 108
Sand Lake 10050 31.0 24.4 127 34.8 32.5 107
South Brush Creek 8440 .0 .0 * 16.9 20.6 82
Tower 10500 40.3 43.8 92 55.0 48.6 113
Webber Springs 9250 10.2 5.2 196 39.8 32.5 122
Willow Creek Pass 9540 11.3 4.9 231 23.1 17.9 129
Zirkel 9340 7.8 .8 975* 50.4 33.7 150
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Basin Index (%) 119 113
SWEETWATER
Deer Park 9700 31.8 7.6 418 47.2 26.7 177
Larsen Creek 9000 .1 1.8 6 28.0 -M *
South Pass 9040 27.1 2.0 1355 37.0 23.1 160
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Basin Index (%) 518 169
LOWER N. PLATTE
Casper Mtn. 7900 .3 .7 43* 21.9 21.1 104
Laprele Creek 8375 .2 .0 * 17.8 17.4 102
Reno Hill 8400 .3 .0 * 22.2 22.0 101
Windy Peak 7900 .0 .0 * 18.3 15.5 118
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Basin Index (%) 114* 106
LARAMIE RIVER
Brooklyn Lake 10240 11.7 11.0 106 29.3 27.8 105
Cinnabar Park 9574 5.2 6.5 80 29.3 29.9 98
Crow Creek 8330 .0 .0 * 16.0 15.8 101
Deadman Hill 10220 16.4 12.5 131 29.2 23.5 124
Rawah 9020 .2 .0 * 22.5 19.2 117
Roach 9700 8.0 6.5 123 28.6 25.2 113
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Basin Index (%) 114 110
S. PLATTE
Black Mountain 8920 .1 -M * 20.9 -M *
Crow Creek 8330 .0 .0 * 16.0 15.8 101
Deadman Hill 10220 16.4 12.5 131 29.2 23.5 124
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Basin Index (%) 131* 115
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * 20.6 18.9 109
Divide Peak 8880 .0 .6 0* 28.1 26.9 104
Elk River 8700 .1 .0 * 24.8 25.0 99
Little Snake River 8915 9.7 6.9 141 45.3 35.8 127
Old Battle 10000 37.0 29.1 127 45.8 42.9 107
Sage Creek Basin 7850 -M .0 * 19.2 17.7 108
Sandstone RS 8150 .0 .0 * 19.6 22.9 86
Whiskey Park 8950 12.0 14.5 83 37.3 34.3 109
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Basin Index (%) 115* 107
UPPER GREEN RIVER
Big Sandy Opening 9080 9.3 .0 * 27.4 17.4 157
Blind Bull Sum 8650 -M 16.5 * 39.6 23.8 166
East Rim Divide 7930 .0 .0 * 23.5 14.6 161
Elkhart Park G.S. 9400 8.9 2.7 330 27.6 17.3 160
Gros Ventre Summit 8750 -M 1.6 * -M 16.5 *
Gunsight Pass 9820 18.9 6.5 291 29.6 18.2 163
Kendall R.S. 7740 .0 .0 * 31.8 17.2 185
Loomis Park 8240 9.5 .0 * 35.4 21.0 169
New Fork Lake 8340 -M .0 * 22.2 14.0 159
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 -M .0 * 29.9 17.2 174
Spring Creek Divide 9000 34.4 15.9 216 46.3 28.7 161
Triple Peak 8500 18.8 2.5 752 46.1 30.9 149
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Basin Index (%) 362* 163
LOWER GREEN RIVER
Blacks Fork Jct 8869 .0 -M * 19.8 -M *
Buck Pasture 9632 .5 -M * 28.7 -M *
EF Blacks Fork GS 9360 -M -M * 24.0 -M *
Hams Fork 7840 .0 .0 * 24.9 14.8 168
Hewinta 9500 .0 .0 * 22.2 18.1 123
Hickerson Park 9122 .0 .0 * 16.2 14.0 116
Hole-in-Rock 9168 .0 .0 * 17.2 13.6 126
Indian Creek 9425 32.2 14.2 227 46.9 27.6 170
Kelley R.S. 8180 1.7 .0 * 35.5 22.3 159
Spirit Lk 10235 1.4 -M * 22.5 -M *
Steel Creek Park 10158 14.1 11.7 121 26.8 21.5 125
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Basin Index (%) 185* 144
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 22.3 -M *
Bug Lake 7987 14.1 .0 * 39.2 24.1 163
Burts Miller Ranch 8000 .0 -M * 12.4 -M *
Chalk Creek #1 9171 18.3 10.3 178 42.5 31.5 135
Hayden Fork 9130 .1 .0 * 33.3 26.3 127
Kelley R.S. 8180 1.7 .0 * 35.5 22.3 159
Lily Lake 9133 .0 .0 * 24.1 21.9 110
Monte Cristo 8932 23.2 8.7 267 46.5 32.2 144
Salt River Summit 7760 .0 .0 * 32.8 20.4 161
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Basin Index (%) 302* 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.