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 TUESDAY: MAY 23 , 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 5.9 .0 * 43.2 24.8 174
Black Bear 8170 44.6 32.3 138 61.7 45.0 137
Blind Bull Sum 8650 -M 18.3 * 39.6 23.5 169
Cottonwood Creek 7670 16.3 3.4 479 45.2 30.4 149
East Rim Divide 7930 .1 .0 * 23.5 14.4 163
Grand Targhee 9260 55.5 41.4 134 53.0 37.5 141
Granite Creek 6770 3.7 .0 * 38.6 23.2 166
Grassy Lake 7265 23.1 14.3 162 62.5 42.3 148
Gros Ventre Summit 8750 -M 3.5 * -M 16.4 *
Gunsight Pass 9820 20.2 8.7 232 29.6 18.0 164
Lewis Lake Divide 7850 33.6 20.2 166 60.2 41.4 145
Phillips Bench 8200 30.2 16.7 181 51.3 33.3 154
Salt River Summit 7760 1.1 .0 * 32.7 20.2 162
Snake River Station 6920 .0 .0 * 39.6 26.8 148
Spring Creek Divide 9000 38.7 18.3 211 45.9 28.4 162
Thumb Divide 7980 1.9 .3 633* 31.2 23.1 135
Togwotee Pass 9580 32.4 22.7 143 44.5 30.1 148
Two Ocean Plateau 9240 -M 27.9 * -M 33.3 *
Willow Creek 8380 -M 13.6 * 59.4 41.3 144
Younts Peak 8350 .0 10.7 0 33.9 19.9 170
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Basin Index (%) 163 152
MADISON-GALLATIN
Black Bear 8170 44.6 32.3 138 61.7 45.0 137
Canyon 7870 6.7 .6 1117* 29.7 20.2 147
Madison Plateau 7750 18.2 12.9 141 41.4 32.0 129
West Yellowstone 6700 .0 .0 * 26.8 17.8 151
Whiskey Creek 6800 2.5 3.7 68 30.8 24.6 125
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Basin Index (%) 145 136
YELLOWSTONE
Beartooth Lake 9360 33.9 20.8 163 33.0 24.4 135
Burnt Mtn 5880 .6 .0 * 23.6 19.7 120
Canyon 7870 6.7 .6 1117* 29.7 20.2 147
Cole Creek 7850 15.9 14.7 108 19.3 19.9 97
Evening Star 9200 35.2 22.6 156 50.9 33.7 151
Fisher Creek 9100 47.9 31.9 150 53.6 38.8 138
Northeast Entrance 7350 .0 .0 * 23.8 15.9 150
Parker Peak 9400 34.6 19.2 180 41.4 22.8 182
Sylvan Lake 8420 16.2 13.7 118 43.5 28.1 155
Thumb Divide 7980 1.9 .3 633* 31.2 23.1 135
Two Ocean Plateau 9240 -M 27.9 * -M 33.3 *
White Mill 8700 31.7 21.4 148 40.6 29.3 139
Wolverine 7650 .0 .0 * 24.8 15.8 157
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Basin Index (%) 155 142
WIND RIVER
Burroughs Creek 8750 6.4 -M * 29.6 -M *
Castle Creek 8400 .0 -M * 18.7 -M *
Cold Springs 9630 6.4 .0 * 24.4 14.6 167
Deer Park 9700 31.8 9.1 349 46.5 26.3 177
Hobbs Park 10100 32.1 11.8 272 37.2 19.6 190
Kirwin 9550 19.3 7.0 276 30.7 16.2 190
Little Warm 9370 11.5 1.0 1150* 28.1 17.7 159
Owl Creek 8975 .0 .0 * 17.1 9.9 173
South Pass 9040 28.9 4.1 705 36.3 22.7 160
St. Lawrence Alt 8620 1.4 .0 * 22.8 13.7 166
Togwotee Pass 9580 32.4 22.7 143 44.5 30.1 148
Townsend Creek 8700 13.4 .0 * 30.7 17.4 176
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Basin Index (%) 318* 169
BIGHORN BASIN
Bald Mtn. 9380 20.9 18.0 116 23.0 22.4 103
Bear Trap Meadow 8200 .0 .0 * 16.8 12.9 130
Bone Springs Div 9350 18.2 13.4 136 23.2 21.3 109
Grave Springs 8550 4.7 .3 1567* 15.3 15.2 101
Kirwin 9550 19.3 7.0 276 30.7 16.2 190
Marquette 8760 16.0 -M * 26.7 -M *
Middle Powder 7760 2.8 2.6 108 15.4 16.5 93
Owl Creek 8975 .0 .0 * 17.1 9.9 173
Powder River Pass 9480 3.4 3.2 106 19.0 17.7 107
Shell Creek 9580 14.3 14.4 99 19.4 18.9 103
Timber Creek 7950 1.9 .0 * 18.3 12.5 146
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Basin Index (%) 145 121
SHOSHONE RIVER
Blackwater 9780 40.1 23.6 170 48.2 26.3 183
Evening Star 9200 35.2 22.6 156 50.9 33.7 151
Marquette 8760 16.0 -M * 26.7 -M *
Sylvan Road 7120 .0 .0 * 33.4 20.6 162
Younts Peak 8350 .0 10.7 0 33.9 19.9 170
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Basin Index (%) 132 166
POWDER RIVER
Bear Trap Meadow 8200 .0 .0 * 16.8 12.9 130
Cloud Peak Reservoir 9860 18.4 13.2 139 28.3 20.0 142
Grave Springs 8550 4.7 .3 1567* 15.3 15.2 101
Hansen Sawmill 8360 6.4 .0 * 20.1 13.3 151
Middle Powder 7760 2.8 2.6 108 15.4 16.5 93
Powder River Pass 9480 3.4 3.2 106 19.0 17.7 107
Soldier Park 8720 8.0 -M * 22.5 -M *
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Basin Index (%) 185* 120
TONGUE RIVER
Big Goose 7990 8.5 2.1 405 21.4 17.5 122
Bone Springs Div 9350 18.2 13.4 136 23.2 21.3 109
Burgess Junction 7880 6.3 6.2 102 17.4 17.3 101
Dome Lake 8880 14.0 4.0 350 24.5 19.4 126
Little Goose 8870 11.8 -M * 25.8 -M *
Sucker Creek 8880 10.8 7.0 154 21.0 20.6 102
Tie Creek 6870 1.2 .0 * 24.6 17.6 140
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Basin Index (%) 180 116
BELLE FOURCHE
Cole Canyon 5910 .0 .0 * 13.6 15.1 90
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Basin Index (%) * 90
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 14.5 17.2 84
North Rapid Creek 6130 .0 .0 * 12.8 14.9 86
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Basin Index (%) * 85
UPPER N. PLATTE
Arapaho Ridge 10960 21.9 15.5 141 32.7 28.7 114
Blackhall Mtn 9820 29.8 -M * 44.7 -M *
Columbine 9160 .5 .1 500* 34.6 30.8 112
Divide Peak 8880 .0 3.0 0 27.7 26.7 104
Joe Wright 10120 15.7 19.7 80 36.8 33.2 111
Laprele Creek 8375 .4 .0 * 17.3 17.1 101
Med Bow 10500 36.7 -M * 43.1 -M *
North French Creek 10130 22.4 27.5 81 36.0 34.1 106
Never Summer 10280 22.1 18.8 118 25.1 -M *
Old Battle 10000 38.1 31.3 122 45.4 42.4 107
Rawah 9020 .5 .1 500* 22.2 19.1 116
Sage Creek Basin 7850 -M .0 * 19.1 17.5 109
Sand Lake 10050 31.2 26.4 118 34.5 32.2 107
South Brush Creek 8440 .0 .0 * 16.3 20.4 80
Tower 10500 41.2 46.4 89 54.6 48.2 113
Webber Springs 9250 12.2 8.8 139 39.6 32.3 123
Willow Creek Pass 9540 12.7 7.5 169 22.8 17.6 130
Zirkel 9340 10.9 5.0 218 49.6 33.5 148
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Basin Index (%) 109 113
SWEETWATER
Deer Park 9700 31.8 9.1 349 46.5 26.3 177
Larsen Creek 9000 .2 2.7 7 27.6 -M *
South Pass 9040 28.9 4.1 705 36.3 22.7 160
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Basin Index (%) 383 169
LOWER N. PLATTE
Casper Mtn. 7900 1.7 2.2 77 21.3 20.7 103
Laprele Creek 8375 .4 .0 * 17.3 17.1 101
Reno Hill 8400 2.4 .8 300* 21.5 21.6 100
Windy Peak 7900 1.4 .0 * 17.9 15.1 119
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Basin Index (%) 197* 105
LARAMIE RIVER
Brooklyn Lake 10240 13.2 13.8 96 28.9 27.5 105
Cinnabar Park 9574 6.5 9.5 68 29.2 29.8 98
Crow Creek 8330 -M .0 * 15.7 15.5 101
Deadman Hill 10220 16.8 14.6 115 28.8 23.3 124
Rawah 9020 .5 .1 500* 22.2 19.1 116
Roach 9700 9.7 9.2 105 28.4 24.9 114
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Basin Index (%) 99 109
S. PLATTE
Black Mountain 8920 2.4 -M * 20.6 -M *
Crow Creek 8330 -M .0 * 15.7 15.5 101
Deadman Hill 10220 16.8 14.6 115 28.8 23.3 124
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Basin Index (%) 115* 115
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * 20.4 18.7 109
Divide Peak 8880 .0 3.0 0 27.7 26.7 104
Elk River 8700 .2 .0 * 24.7 24.8 100
Little Snake River 8915 12.1 9.9 122 45.2 35.4 128
Old Battle 10000 38.1 31.3 122 45.4 42.4 107
Sage Creek Basin 7850 -M .0 * 19.1 17.5 109
Sandstone RS 8150 .0 .0 * 19.3 22.7 85
Whiskey Park 8950 16.3 18.8 87 37.3 34.0 110
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Basin Index (%) 106 108
UPPER GREEN RIVER
Big Sandy Opening 9080 12.4 .4 3100* 27.0 17.1 158
Blind Bull Sum 8650 -M 18.3 * 39.6 23.5 169
East Rim Divide 7930 .1 .0 * 23.5 14.4 163
Elkhart Park G.S. 9400 11.8 4.2 281 27.6 17.1 161
Gros Ventre Summit 8750 -M 3.5 * -M 16.4 *
Gunsight Pass 9820 20.2 8.7 232 29.6 18.0 164
Kendall R.S. 7740 .0 .0 * 31.8 17.0 187
Loomis Park 8240 12.3 .5 2460* 35.4 20.8 170
New Fork Lake 8340 -M .0 * 21.9 13.8 159
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 -M .0 * 29.8 17.0 175
Spring Creek Divide 9000 38.7 18.3 211 45.9 28.4 162
Triple Peak 8500 22.1 5.5 402 45.6 30.6 149
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Basin Index (%) 313* 164
LOWER GREEN RIVER
Blacks Fork Jct 8869 .1 -M * 19.7 -M *
Buck Pasture 9632 3.9 -M * 28.4 -M *
EF Blacks Fork GS 9360 -M -M * 23.9 -M *
Hams Fork 7840 .0 .0 * 24.9 14.7 169
Hewinta 9500 .0 .0 * 22.2 17.9 124
Hickerson Park 9122 .1 .0 * 16.3 13.7 119
Hole-in-Rock 9168 .0 .0 * 17.2 13.3 129
Indian Creek 9425 35.2 16.3 216 46.9 27.3 172
Kelley R.S. 8180 6.2 .7 886* 35.4 22.1 160
Spirit Lk 10235 4.1 -M * 22.6 -M *
Steel Creek Park 10158 16.2 13.3 122 26.6 21.3 125
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Basin Index (%) 190* 145
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 22.2 -M *
Bug Lake 7987 19.0 1.2 1583* 38.9 23.8 163
Burts Miller Ranch 8000 .0 -M * 12.4 -M *
Chalk Creek #1 9171 22.7 12.8 177 42.4 31.1 136
Hayden Fork 9130 .1 .0 * 33.3 26.1 128
Kelley R.S. 8180 6.2 .7 886* 35.4 22.1 160
Lily Lake 9133 .1 .0 * 24.0 21.6 111
Monte Cristo 8932 27.8 11.9 234 46.3 32.0 145
Salt River Summit 7760 1.1 .0 * 32.7 20.2 162
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Basin Index (%) 289* 143
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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.