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 MONDAY: MAY 29 , 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 .6 .0 * 43.3 25.4 170
Black Bear 8170 40.4 28.0 144 61.9 45.9 135
Blind Bull Sum 8650 47.4 14.2 334 40.0 24.1 166
Cottonwood Creek 7670 10.5 .0 * 46.0 31.1 148
East Rim Divide 7930 .1 .0 * 23.7 14.8 160
Grand Targhee 9260 52.2 40.8 128 53.5 38.2 140
Granite Creek 6770 .0 .0 * 39.5 23.8 166
Grassy Lake 7265 17.6 8.3 212 62.9 43.3 145
Gros Ventre Summit 8750 8.8 .0 * 27.4 16.8 163
Gunsight Pass 9820 18.0 4.6 391 30.1 18.4 164
Lewis Lake Divide 7850 27.2 14.6 186 60.3 42.3 143
Phillips Bench 8200 25.6 12.1 212 51.7 33.9 153
Salt River Summit 7760 .0 .0 * 32.9 20.6 160
Snake River Station 6920 .0 .0 * 40.0 27.5 145
Spring Creek Divide 9000 32.4 13.6 238 46.5 28.9 161
Thumb Divide 7980 .3 .0 * 31.5 23.6 133
Togwotee Pass 9580 30.2 20.6 147 44.9 30.7 146
Two Ocean Plateau 9240 -M 26.5 * -M 34.1 *
Willow Creek 8380 -M 6.4 * 60.0 42.2 142
Younts Peak 8350 .0 6.3 0 34.8 20.4 171
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Basin Index (%) 191 151
MADISON-GALLATIN
Black Bear 8170 40.4 28.0 144 61.9 45.9 135
Canyon 7870 1.4 .0 * 30.0 20.7 145
Madison Plateau 7750 13.2 9.0 147 41.6 32.8 127
West Yellowstone 6700 .0 .0 * 26.8 18.3 146
Whiskey Creek 6800 -M .0 * 31.7 25.3 125
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Basin Index (%) 149* 134
YELLOWSTONE
Beartooth Lake 9360 31.4 18.9 166 33.3 25.0 133
Burnt Mtn 5880 .0 .0 * 23.7 20.5 116
Canyon 7870 1.4 .0 * 30.0 20.7 145
Cole Creek 7850 13.2 11.4 116 19.6 21.0 93
Evening Star 9200 33.2 19.8 168 51.2 34.6 148
Fisher Creek 9100 43.4 29.2 149 53.7 39.7 135
Northeast Entrance 7350 .0 .0 * 23.8 16.4 145
Parker Peak 9400 30.9 15.9 194 41.5 23.5 177
Sylvan Lake 8420 11.8 9.6 123 43.7 29.0 151
Thumb Divide 7980 .3 .0 * 31.5 23.6 133
Two Ocean Plateau 9240 -M 26.5 * -M 34.1 *
White Mill 8700 27.9 18.9 148 40.7 30.1 135
Wolverine 7650 -M .0 * 24.9 16.3 153
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Basin Index (%) 156 139
WIND RIVER
Burroughs Creek 8750 1.5 -M * 30.1 -M *
Castle Creek 8400 .0 -M * 19.3 -M *
Cold Springs 9630 2.3 .0 * 24.9 15.1 165
Deer Park 9700 30.9 5.4 572 47.9 26.9 178
Hobbs Park 10100 30.8 8.1 380 38.7 20.2 192
Kirwin 9550 17.1 3.6 475 31.5 16.7 189
Little Warm 9370 8.5 .0 * 28.3 18.2 155
Owl Creek 8975 .0 .0 * 17.4 10.5 166
South Pass 9040 27.4 .7 3914* 38.0 23.4 162
St. Lawrence Alt 8620 .0 .0 * 23.4 14.3 164
Togwotee Pass 9580 30.2 20.6 147 44.9 30.7 146
Townsend Creek 8700 10.4 .0 * 32.0 17.9 179
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Basin Index (%) 410* 169
BIGHORN BASIN
Bald Mtn. 9380 20.0 15.3 131 23.7 23.2 102
Bear Trap Meadow 8200 .0 .0 * 17.2 13.6 126
Bone Springs Div 9350 15.7 10.8 145 23.7 22.0 108
Grave Springs 8550 .7 .0 * 15.8 16.0 99
Kirwin 9550 17.1 3.6 475 31.5 16.7 189
Marquette 8760 13.7 -M * 26.7 -M *
Middle Powder 7760 .0 .0 * 15.9 17.1 93
Owl Creek 8975 .0 .0 * 17.4 10.5 166
Powder River Pass 9480 .2 .0 * 19.4 18.4 105
Shell Creek 9580 12.9 11.2 115 19.8 19.6 101
Timber Creek 7950 .0 .0 * 19.1 13.2 145
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Basin Index (%) 163* 119
SHOSHONE RIVER
Blackwater 9780 36.6 21.7 169 48.5 27.1 179
Evening Star 9200 33.2 19.8 168 51.2 34.6 148
Marquette 8760 13.7 -M * 26.7 -M *
Sylvan Road 7120 .0 .0 * 33.4 21.1 158
Younts Peak 8350 .0 6.3 0 34.8 20.4 171
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Basin Index (%) 146 163
POWDER RIVER
Bear Trap Meadow 8200 .0 .0 * 17.2 13.6 126
Cloud Peak Reservoir 9860 17.1 8.4 204 28.9 20.9 138
Grave Springs 8550 .7 .0 * 15.8 16.0 99
Hansen Sawmill 8360 2.4 .0 * 19.0 13.9 137
Middle Powder 7760 .0 .0 * 15.9 17.1 93
Powder River Pass 9480 .2 .0 * 19.4 18.4 105
Soldier Park 8720 4.2 -M * 23.0 -M *
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Basin Index (%) 243* 116
TONGUE RIVER
Big Goose 7990 5.4 .0 * 21.8 18.1 120
Bone Springs Div 9350 15.7 10.8 145 23.7 22.0 108
Burgess Junction 7880 3.0 1.4 214 18.6 17.8 104
Dome Lake 8880 12.0 .0 * 25.3 20.1 126
Little Goose 8870 9.4 -M * 26.3 -M *
Sucker Creek 8880 8.7 2.3 378 21.5 21.2 101
Tie Creek 6870 .2 .0 * 24.8 18.4 135
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Basin Index (%) 310* 115
BELLE FOURCHE
Cole Canyon 5910 .0 .0 * 14.3 16.1 89
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Basin Index (%) * 89
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 15.2 18.0 84
North Rapid Creek 6130 .0 .0 * 13.3 15.7 85
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Basin Index (%) * 85
UPPER N. PLATTE
Arapaho Ridge 10960 20.6 10.2 202 33.5 29.0 116
Blackhall Mtn 9820 28.1 -M * 45.3 -M *
Columbine 9160 .0 .0 * 35.4 31.3 113
Divide Peak 8880 .0 .0 * 28.3 27.2 104
Joe Wright 10120 14.8 15.7 94 38.1 33.9 112
Laprele Creek 8375 .2 .0 * 18.1 17.7 102
Med Bow 10500 35.9 -M * 44.2 -M *
North French Creek 10130 21.8 23.0 95 36.8 34.8 106
Never Summer 10280 22.7 16.6 137 26.2 -M *
Old Battle 10000 37.4 26.5 141 46.7 43.2 108
Rawah 9020 .2 .0 * 23.1 19.3 120
Sage Creek Basin 7850 -M .0 * 19.6 17.8 110
Sand Lake 10050 31.1 22.1 141 35.8 32.8 109
South Brush Creek 8440 .0 .0 * 17.5 20.9 84
Tower 10500 40.5 40.1 101 56.2 48.9 115
Webber Springs 9250 9.3 1.1 845* 40.5 32.8 123
Willow Creek Pass 9540 10.6 1.9 558 23.7 18.2 130
Zirkel 9340 5.4 .0 * 50.6 33.8 150
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Basin Index (%) 137* 114
SWEETWATER
Deer Park 9700 30.9 5.4 572 47.9 26.9 178
Larsen Creek 9000 .2 .9 22* 28.4 -M *
South Pass 9040 27.4 .7 3914* 38.0 23.4 162
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Basin Index (%) 836* 171
LOWER N. PLATTE
Casper Mtn. 7900 .4 .0 * 22.2 21.4 104
Laprele Creek 8375 .2 .0 * 18.1 17.7 102
Reno Hill 8400 .1 .0 * 22.5 22.4 100
Windy Peak 7900 .0 .0 * 18.7 15.8 118
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Basin Index (%) * 105
LARAMIE RIVER
Brooklyn Lake 10240 10.2 8.0 128 29.9 28.1 106
Cinnabar Park 9574 3.4 3.7 92 29.5 30.1 98
Crow Creek 8330 .0 .0 * 16.1 15.9 101
Deadman Hill 10220 17.0 10.3 165 30.0 23.8 126
Rawah 9020 .2 .0 * 23.1 19.3 120
Roach 9700 6.9 3.9 177 29.0 25.4 114
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Basin Index (%) 146 111
S. PLATTE
Black Mountain 8920 -M -M * 21.2 -M *
Crow Creek 8330 .0 .0 * 16.1 15.9 101
Deadman Hill 10220 17.0 10.3 165 30.0 23.8 126
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Basin Index (%) 165* 116
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * 20.9 19.1 109
Divide Peak 8880 .0 .0 * 28.3 27.2 104
Elk River 8700 .1 .0 * 25.2 25.2 100
Little Snake River 8915 7.9 4.1 193 45.8 35.9 128
Old Battle 10000 37.4 26.5 141 46.7 43.2 108
Sage Creek Basin 7850 -M .0 * 19.6 17.8 110
Sandstone RS 8150 .0 .0 * 20.0 23.1 87
Whiskey Park 8950 12.2 10.2 120 37.8 34.6 109
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Basin Index (%) 141* 108
UPPER GREEN RIVER
Big Sandy Opening 9080 8.0 .0 * 27.5 17.7 155
Blind Bull Sum 8650 47.4 14.2 334 40.0 24.1 166
East Rim Divide 7930 .1 .0 * 23.7 14.8 160
Elkhart Park G.S. 9400 7.5 1.0 750* 27.7 17.6 157
Gros Ventre Summit 8750 8.8 .0 * 27.4 16.8 163
Gunsight Pass 9820 18.0 4.6 391 30.1 18.4 164
Kendall R.S. 7740 .0 .0 * 31.9 17.4 183
Loomis Park 8240 7.5 .0 * 35.5 21.3 167
New Fork Lake 8340 -M .0 * 22.5 14.3 157
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 -M .0 * 30.2 17.4 174
Spring Creek Divide 9000 32.4 13.6 238 46.5 28.9 161
Triple Peak 8500 16.7 .1 16700* 46.4 31.2 149
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Basin Index (%) 437* 162
LOWER GREEN RIVER
Blacks Fork Jct 8869 .0 -M * 19.8 -M *
Buck Pasture 9632 .2 -M * 28.9 -M *
EF Blacks Fork GS 9360 -M -M * 24.1 -M *
Hams Fork 7840 .0 .0 * 25.0 15.0 167
Hewinta 9500 .0 .0 * 22.4 18.4 122
Hickerson Park 9122 .0 .0 * 16.3 14.2 115
Hole-in-Rock 9168 .0 .0 * 17.2 13.7 126
Indian Creek 9425 29.6 12.6 235 47.1 27.8 169
Kelley R.S. 8180 -M .0 * 35.6 22.6 158
Spirit Lk 10235 .2 -M * 22.6 -M *
Steel Creek Park 10158 13.3 10.5 127 26.9 21.7 124
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Basin Index (%) 186* 143
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 22.3 -M *
Bug Lake 7987 10.6 .0 * 39.3 24.3 162
Burts Miller Ranch 8000 .0 -M * 12.4 -M *
Chalk Creek #1 9171 15.7 8.1 194 42.5 31.7 134
Hayden Fork 9130 .1 .0 * 33.2 26.6 125
Kelley R.S. 8180 -M .0 * 35.6 22.6 158
Lily Lake 9133 .0 .0 * 24.1 22.1 109
Monte Cristo 8932 20.2 6.3 321 46.5 32.5 143
Salt River Summit 7760 .0 .0 * 32.9 20.6 160
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Basin Index (%) 324* 141
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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.