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 18 , 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 * 43.0 24.3 177
Black Bear 8170 45.6 34.8 131 61.3 44.4 138
Blind Bull Sum 8650 -M 21.0 * 39.3 23.1 170
Cottonwood Creek 7670 18.4 8.2 224 44.4 29.8 149
East Rim Divide 7930 .0 1.8 0 23.3 14.0 166
Grand Targhee 9260 54.9 43.4 126 52.5 36.7 143
Granite Creek 6770 8.7 .0 * 38.6 22.8 169
Grassy Lake 7265 25.2 19.5 129 62.2 41.7 149
Gros Ventre Summit 8750 -M 7.0 * -M 16.0 *
Gunsight Pass 9820 19.9 11.4 175 29.0 17.6 165
Lewis Lake Divide 7850 35.8 23.8 150 60.0 40.8 147
Phillips Bench 8200 31.6 20.5 154 51.3 32.7 157
Salt River Summit 7760 3.2 .0 * 32.1 19.8 162
Snake River Station 6920 .0 .0 * 39.5 26.3 150
Spring Creek Divide 9000 37.4 21.5 174 45.4 27.9 163
Thumb Divide 7980 4.5 2.8 161 30.9 22.6 137
Togwotee Pass 9580 32.2 23.5 137 44.0 29.5 149
Two Ocean Plateau 9240 -M 28.7 * -M 32.6 *
Willow Creek 8380 -M 18.2 * 59.3 40.6 146
Younts Peak 8350 2.7 12.5 22 33.5 19.3 174
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Basin Index (%) 147 154
MADISON-GALLATIN
Black Bear 8170 45.6 34.8 131 61.3 44.4 138
Canyon 7870 8.8 3.5 251 29.6 19.7 150
Madison Plateau 7750 19.1 15.3 125 41.0 31.3 131
West Yellowstone 6700 .0 .0 * 26.5 17.4 152
Whiskey Creek 6800 4.3 6.9 62 30.0 24.1 124
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Basin Index (%) 129 138
YELLOWSTONE
Beartooth Lake 9360 33.8 22.1 153 32.2 24.0 134
Burnt Mtn 5880 2.3 .0 * 21.8 18.9 115
Canyon 7870 8.8 3.5 251 29.6 19.7 150
Cole Creek 7850 14.4 16.7 86 17.1 19.3 89
Evening Star 9200 34.9 24.5 142 49.9 33.1 151
Fisher Creek 9100 50.0 33.3 150 53.1 38.1 139
Northeast Entrance 7350 .2 .0 * 23.8 15.3 156
Parker Peak 9400 34.8 20.6 169 41.0 22.2 185
Sylvan Lake 8420 16.5 15.9 104 43.2 27.3 158
Thumb Divide 7980 4.5 2.8 161 30.9 22.6 137
Two Ocean Plateau 9240 -M 28.7 * -M 32.6 *
White Mill 8700 33.6 23.2 145 40.2 28.7 140
Wolverine 7650 .0 .0 * 24.5 15.4 159
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Basin Index (%) 144 143
WIND RIVER
Burroughs Creek 8750 8.5 -M * 29.5 -M *
Castle Creek 8400 .0 -M * 18.2 -M *
Cold Springs 9630 4.9 .0 * 22.7 14.3 159
Deer Park 9700 30.4 11.8 258 44.6 25.9 172
Hobbs Park 10100 29.6 14.0 211 34.8 19.1 182
Kirwin 9550 18.9 9.3 203 29.5 15.7 188
Little Warm 9370 11.4 4.2 271 27.6 17.3 160
Owl Creek 8975 .0 .0 * 15.8 9.5 166
South Pass 9040 27.2 8.5 320 34.1 22.3 153
St. Lawrence Alt 8620 -M .0 * 20.9 13.4 156
Togwotee Pass 9580 32.2 23.5 137 44.0 29.5 149
Townsend Creek 8700 11.5 .2 5750* 28.6 17.0 168
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Basin Index (%) 232 164
BIGHORN BASIN
Bald Mtn. 9380 20.5 20.0 102 22.6 21.9 103
Bear Trap Meadow 8200 .5 .0 * 16.2 12.5 130
Bone Springs Div 9350 17.8 15.0 119 22.7 20.7 110
Grave Springs 8550 4.4 4.4 100 14.1 14.9 95
Kirwin 9550 18.9 9.3 203 29.5 15.7 188
Marquette 8760 13.8 -M * 24.2 -M *
Middle Powder 7760 4.0 7.0 57 15.1 16.2 93
Owl Creek 8975 .0 .0 * 15.8 9.5 166
Powder River Pass 9480 3.6 6.8 53 18.5 17.1 108
Shell Creek 9580 14.0 15.8 89 19.0 18.4 103
Timber Creek 7950 .7 .0 * 16.1 12.0 134
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Basin Index (%) 108 119
SHOSHONE RIVER
Blackwater 9780 39.6 24.8 160 47.5 25.7 185
Evening Star 9200 34.9 24.5 142 49.9 33.1 151
Marquette 8760 13.8 -M * 24.2 -M *
Sylvan Road 7120 .0 .0 * 33.2 20.1 165
Younts Peak 8350 2.7 12.5 22 33.5 19.3 174
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Basin Index (%) 125 167
POWDER RIVER
Bear Trap Meadow 8200 .5 .0 * 16.2 12.5 130
Cloud Peak Reservoir 9860 17.7 15.5 114 27.4 19.4 141
Grave Springs 8550 4.4 4.4 100 14.1 14.9 95
Hansen Sawmill 8360 6.9 .0 * 20.4 12.7 161
Middle Powder 7760 4.0 7.0 57 15.1 16.2 93
Powder River Pass 9480 3.6 6.8 53 18.5 17.1 108
Soldier Park 8720 8.4 -M * 22.0 -M *
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Basin Index (%) 110 120
TONGUE RIVER
Big Goose 7990 8.3 6.6 126 20.7 17.1 121
Bone Springs Div 9350 17.8 15.0 119 22.7 20.7 110
Burgess Junction 7880 6.4 9.3 69 16.4 16.8 98
Dome Lake 8880 13.8 7.8 177 23.9 18.9 126
Little Goose 8870 11.2 -M * 25.1 -M *
Sucker Creek 8880 10.4 9.7 107 20.3 20.0 102
Tie Creek 6870 -M .0 * -M 17.2 *
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Basin Index (%) 117 111
BELLE FOURCHE
Cole Canyon 5910 .0 .0 * 12.9 14.7 88
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Basin Index (%) * 88
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 13.6 16.5 82
North Rapid Creek 6130 .0 .0 * 11.8 14.3 83
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Basin Index (%) * 82
UPPER N. PLATTE
Arapaho Ridge 10960 19.9 19.8 101 30.6 28.4 108
Blackhall Mtn 9820 27.5 -M * 42.5 -M *
Columbine 9160 .0 5.2 0 32.5 30.5 107
Divide Peak 8880 .0 7.7 0 26.4 26.3 100
Joe Wright 10120 13.1 21.9 60 34.2 32.6 105
Laprele Creek 8375 .2 .0 * 15.7 16.8 93
Med Bow 10500 34.7 -M * 41.7 -M *
North French Creek 10130 20.9 30.8 68 34.6 33.5 103
Never Summer 10280 20.8 21.3 98 23.5 -M *
Old Battle 10000 35.5 33.4 106 43.4 41.9 104
Rawah 9020 .4 .7 57* 20.9 18.9 111
Sage Creek Basin 7850 -M .0 * 18.5 17.2 108
Sand Lake 10050 29.2 28.8 101 32.3 31.7 102
South Brush Creek 8440 .0 .4 0* 16.1 19.9 81
Tower 10500 37.5 48.6 77 52.0 47.6 109
Webber Springs 9250 11.0 13.9 79 37.8 31.9 118
Willow Creek Pass 9540 11.4 10.2 112 21.2 17.2 123
Zirkel 9340 9.8 13.0 75 47.7 33.3 143
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Basin Index (%) 82 108
SWEETWATER
Deer Park 9700 30.4 11.8 258 44.6 25.9 172
Larsen Creek 9000 .5 4.2 12 27.0 -M *
South Pass 9040 27.2 8.5 320 34.1 22.3 153
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Basin Index (%) 237 163
LOWER N. PLATTE
Casper Mtn. 7900 .3 6.4 5 19.8 20.3 98
Laprele Creek 8375 .2 .0 * 15.7 16.8 93
Reno Hill 8400 .5 5.6 9 19.7 21.2 93
Windy Peak 7900 .0 .0 * 15.3 14.7 104
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Basin Index (%) 8 97
LARAMIE RIVER
Brooklyn Lake 10240 11.7 18.0 65 26.9 27.0 100
Cinnabar Park 9574 5.1 13.8 37 27.4 29.5 93
Crow Creek 8330 .2 .0 * 13.0 15.0 87
Deadman Hill 10220 14.1 17.6 80 26.0 22.8 114
Rawah 9020 .4 .7 57* 20.9 18.9 111
Roach 9700 7.7 12.6 61 26.2 24.5 107
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Basin Index (%) 63 102
S. PLATTE
Black Mountain 8920 .6 -M * 17.7 -M *
Crow Creek 8330 .2 .0 * 13.0 15.0 87
Deadman Hill 10220 14.1 17.6 80 26.0 22.8 114
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Basin Index (%) 81* 103
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * 19.8 18.5 107
Divide Peak 8880 .0 7.7 0 26.4 26.3 100
Elk River 8700 .4 .3 133* 23.8 24.5 97
Little Snake River 8915 11.4 15.5 74 44.0 35.0 126
Old Battle 10000 35.5 33.4 106 43.4 41.9 104
Sage Creek Basin 7850 -M .0 * 18.5 17.2 108
Sandstone RS 8150 .1 .0 * 19.1 22.4 85
Whiskey Park 8950 16.3 23.2 70 35.9 33.7 107
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Basin Index (%) 80 105
UPPER GREEN RIVER
Big Sandy Opening 9080 13.0 5.2 250 26.7 16.8 159
Blind Bull Sum 8650 -M 21.0 * 39.3 23.1 170
East Rim Divide 7930 .0 1.8 0 23.3 14.0 166
Elkhart Park G.S. 9400 12.5 6.9 181 27.4 16.6 165
Gros Ventre Summit 8750 -M 7.0 * -M 16.0 *
Gunsight Pass 9820 19.9 11.4 175 29.0 17.6 165
Kendall R.S. 7740 .0 .0 * 31.7 16.7 190
Loomis Park 8240 14.0 4.0 350 35.4 20.4 174
New Fork Lake 8340 .0 .0 * 21.2 13.5 157
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 -M 1.7 * 29.2 16.7 175
Spring Creek Divide 9000 37.4 21.5 174 45.4 27.9 163
Triple Peak 8500 23.5 10.3 228 45.0 30.1 150
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Basin Index (%) 197 166
LOWER GREEN RIVER
Blacks Fork Jct 8869 .0 -M * 19.4 -M *
Buck Pasture 9632 4.8 -M * 28.1 -M *
EF Blacks Fork GS 9360 -M -M * 23.4 -M *
Hams Fork 7840 .0 .0 * 24.3 14.3 170
Hewinta 9500 .0 .0 * 21.4 17.6 122
Hickerson Park 9122 .4 .0 * 15.5 13.3 117
Hole-in-Rock 9168 .0 .0 * 16.0 12.9 124
Indian Creek 9425 34.3 20.0 172 45.8 26.9 170
Kelley R.S. 8180 7.4 4.3 172 34.7 21.6 161
Spirit Lk 10235 3.6 -M * 21.6 -M *
Steel Creek Park 10158 15.8 15.5 102 25.9 20.9 124
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Basin Index (%) 145* 144
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 21.8 -M *
Bug Lake 7987 19.6 7.4 265 38.4 23.3 165
Burts Miller Ranch 8000 .0 -M * 12.0 -M *
Chalk Creek #1 9171 23.6 17.2 137 42.0 30.7 137
Hayden Fork 9130 .3 .4 75* 33.0 25.6 129
Kelley R.S. 8180 7.4 4.3 172 34.7 21.6 161
Lily Lake 9133 .0 .0 * 23.4 21.2 110
Monte Cristo 8932 27.7 16.7 166 46.0 31.4 146
Salt River Summit 7760 3.2 .0 * 32.1 19.8 162
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Basin Index (%) 178* 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.