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 SATURDAY: MAY 13 , 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 -M 2.7 * -M 23.9 *
Black Bear 8170 45.8 36.5 125 59.8 43.6 137
Blind Bull Sum 8650 -M 22.2 * 39.2 22.6 173
Cottonwood Creek 7670 20.4 11.6 176 44.1 29.3 151
East Rim Divide 7930 .1 5.0 2 23.1 13.8 167
Grand Targhee 9260 56.5 45.9 123 51.8 36.5 142
Granite Creek 6770 13.1 3.2 409 38.4 22.4 171
Grassy Lake 7265 -M 23.9 * -M 40.9 *
Gros Ventre Summit 8750 15.3 9.2 166 26.7 15.6 171
Gunsight Pass 9820 21.2 12.4 171 28.7 17.3 166
Lewis Lake Divide 7850 38.9 27.9 139 59.7 40.1 149
Phillips Bench 8200 33.8 22.5 150 50.8 32.3 157
Salt River Summit 7760 6.0 2.7 222 32.0 19.4 165
Snake River Station 6920 .0 .6 0* 39.2 25.8 152
Spring Creek Divide 9000 40.7 23.1 176 44.9 27.5 163
Thumb Divide 7980 -M 6.8 * -M 22.1 *
Togwotee Pass 9580 32.5 25.1 129 43.3 29.0 149
Two Ocean Plateau 9240 -M 29.4 * -M 32.0 *
Willow Creek 8380 -M 20.2 * -M 39.9 *
Younts Peak 8350 8.6 14.5 59 33.7 18.9 178
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Basin Index (%) 139 156
MADISON-GALLATIN
Black Bear 8170 45.8 36.5 125 59.8 43.6 137
Canyon 7870 10.4 6.3 165 28.8 19.2 150
Madison Plateau 7750 20.1 18.4 109 40.1 30.3 132
West Yellowstone 6700 .0 .0 * 25.9 16.9 153
Whiskey Creek 6800 5.8 9.5 61 30.0 23.4 128
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Basin Index (%) 116 138
YELLOWSTONE
Beartooth Lake 9360 -M 22.8 * -M 23.5 *
Burnt Mtn 5880 .0 .0 * 18.6 18.7 99
Canyon 7870 10.4 6.3 165 28.8 19.2 150
Cole Creek 7850 12.7 17.1 74 14.2 18.8 76
Evening Star 9200 34.8 25.5 136 49.6 32.3 154
Fisher Creek 9100 -M 34.4 * -M 37.2 *
Northeast Entrance 7350 -M .5 * -M 14.9 *
Parker Peak 9400 36.5 22.0 166 40.1 21.6 186
Sylvan Lake 8420 -M 17.5 * 42.1 26.8 157
Thumb Divide 7980 -M 6.8 * -M 22.1 *
Two Ocean Plateau 9240 -M 29.4 * -M 32.0 *
White Mill 8700 35.2 24.8 142 40.1 28.0 143
Wolverine 7650 -M .0 * 23.7 15.0 158
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Basin Index (%) 135* 143
WIND RIVER
Burroughs Creek 8750 11.1 -M * 29.4 -M *
Castle Creek 8400 -M -M * -M -M *
Cold Springs 9630 7.9 .8 988 22.6 13.9 163
Deer Park 9700 31.9 14.2 225 43.5 25.4 171
Hobbs Park 10100 31.3 15.6 201 34.9 18.5 189
Kirwin 9550 -M 10.7 * -M 15.2 *
Little Warm 9370 13.4 6.5 206 27.6 16.8 164
Owl Creek 8975 .0 .3 0* 15.6 9.1 171
South Pass 9040 28.2 10.9 259 33.9 21.9 155
St. Lawrence Alt 8620 .0 .4 0* 20.8 13.0 160
Togwotee Pass 9580 32.5 25.1 129 43.3 29.0 149
Townsend Creek 8700 14.1 2.3 613 28.4 16.5 172
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Basin Index (%) 209 165
BIGHORN BASIN
Bald Mtn. 9380 20.9 20.8 100 21.6 21.5 100
Bear Trap Meadow 8200 .0 .0 * 15.0 12.0 125
Bone Springs Div 9350 19.3 16.3 118 22.4 20.1 111
Grave Springs 8550 6.7 7.1 94 13.8 14.6 95
Kirwin 9550 -M 10.7 * -M 15.2 *
Marquette 8760 15.1 -M * 23.9 -M *
Middle Powder 7760 6.9 9.9 70 14.7 15.7 94
Owl Creek 8975 .0 .3 0* 15.6 9.1 171
Powder River Pass 9480 5.6 8.7 64 18.2 16.6 110
Shell Creek 9580 15.8 16.8 94 18.7 18.0 104
Timber Creek 7950 .1 .8 12 15.1 11.6 130
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Basin Index (%) 93 111
SHOSHONE RIVER
Blackwater 9780 39.7 24.6 161 46.6 25.1 186
Evening Star 9200 34.8 25.5 136 49.6 32.3 154
Marquette 8760 15.1 -M * 23.9 -M *
Sylvan Road 7120 .0 .2 0* 32.3 19.6 165
Younts Peak 8350 8.6 14.5 59 33.7 18.9 178
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Basin Index (%) 128 169
POWDER RIVER
Bear Trap Meadow 8200 .0 .0 * 15.0 12.0 125
Cloud Peak Reservoir 9860 18.6 16.6 112 26.5 18.8 141
Grave Springs 8550 6.7 7.1 94 13.8 14.6 95
Hansen Sawmill 8360 9.7 .4 2425* 18.9 12.3 154
Middle Powder 7760 6.9 9.9 70 14.7 15.7 94
Powder River Pass 9480 5.6 8.7 64 18.2 16.6 110
Soldier Park 8720 11.4 -M * 20.8 -M *
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Basin Index (%) 111 119
TONGUE RIVER
Big Goose 7990 10.4 9.6 108 20.2 16.5 122
Bone Springs Div 9350 19.3 16.3 118 22.4 20.1 111
Burgess Junction 7880 9.0 11.2 80 16.4 16.4 100
Dome Lake 8880 15.1 10.7 141 22.2 18.4 121
Little Goose 8870 13.6 -M * 24.3 -M *
Sucker Creek 8880 11.6 12.2 95 19.4 19.5 99
Tie Creek 6870 .2 .6 33 19.9 16.7 119
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Basin Index (%) 108 112
BELLE FOURCHE
Cole Canyon 5910 .0 .0 * 12.4 14.2 87
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Basin Index (%) * 87
CHEYENNE RIVER BASIN
Blind Park 6890 .1 .0 * 12.3 16.0 77
North Rapid Creek 6130 .0 .0 * 10.3 14.1 73
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Basin Index (%) * 75
UPPER N. PLATTE
Arapaho Ridge 10960 22.7 22.1 103 30.4 28.0 109
Blackhall Mtn 9820 31.9 -M * 42.3 -M *
Columbine 9160 -M 10.3 * -M 29.9 *
Divide Peak 8880 2.2 12.2 18 26.4 25.8 102
Joe Wright 10120 16.1 23.1 70 34.0 31.9 107
Laprele Creek 8375 .3 .6 50* 16.0 16.3 98
Med Bow 10500 37.3 -M * 41.3 -M *
North French Creek 10130 24.4 32.3 76 34.3 32.8 105
Never Summer 10280 23.0 22.2 104 23.1 -M *
Old Battle 10000 -M 36.4 * -M 41.3 *
Rawah 9020 .1 1.8 6 20.9 18.6 112
Sage Creek Basin 7850 -M .0 * 18.2 17.1 106
Sand Lake 10050 32.3 31.3 103 32.3 31.0 104
South Brush Creek 8440 .0 2.8 0 17.1 19.4 88
Tower 10500 42.7 50.7 84 52.0 47.0 111
Webber Springs 9250 15.7 17.7 89 37.5 31.5 119
Willow Creek Pass 9540 15.0 12.2 123 21.0 16.7 126
Zirkel 9340 15.6 18.3 85 47.4 33.1 143
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Basin Index (%) 85 111
SWEETWATER
Deer Park 9700 31.9 14.2 225 43.5 25.4 171
Larsen Creek 9000 1.8 5.6 32 26.2 -M *
South Pass 9040 28.2 10.9 259 33.9 21.9 155
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Basin Index (%) 202 164
LOWER N. PLATTE
Casper Mtn. 7900 4.5 10.4 43 19.7 19.8 99
Laprele Creek 8375 .3 .6 50* 16.0 16.3 98
Reno Hill 8400 4.5 8.9 51 20.2 20.6 98
Windy Peak 7900 .1 .0 * 15.4 14.1 109
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Basin Index (%) 47 101
LARAMIE RIVER
Brooklyn Lake 10240 16.1 20.5 79 27.0 26.4 102
Cinnabar Park 9574 9.2 16.3 56 27.0 29.0 93
Crow Creek 8330 .0 .0 * 12.5 14.7 85
Deadman Hill 10220 17.9 18.4 97 25.2 22.1 114
Rawah 9020 .1 1.8 6 20.9 18.6 112
Roach 9700 -M 14.6 * -M 23.7 *
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Basin Index (%) 76 102
S. PLATTE
Black Mountain 8920 -M -M * 16.8 -M *
Crow Creek 8330 .0 .0 * 12.5 14.7 85
Deadman Hill 10220 17.9 18.4 97 25.2 22.1 114
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Basin Index (%) 97* 102
LITTLE SNAKE RIVER
Battle Mountain 7440 -M .0 * -M 18.3 *
Divide Peak 8880 2.2 12.2 18 26.4 25.8 102
Elk River 8700 .1 5.2 2 23.2 24.1 96
Little Snake River 8915 -M 19.3 * -M 34.8 *
Old Battle 10000 -M 36.4 * -M 41.3 *
Sage Creek Basin 7850 -M .0 * 18.2 17.1 106
Sandstone RS 8150 .0 .0 * 19.7 22.1 89
Whiskey Park 8950 20.6 25.6 80 35.4 33.3 106
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Basin Index (%) 53* 100
UPPER GREEN RIVER
Big Sandy Opening 9080 14.5 8.4 173 25.8 16.4 157
Blind Bull Sum 8650 -M 22.2 * 39.2 22.6 173
East Rim Divide 7930 .1 5.0 2 23.1 13.8 167
Elkhart Park G.S. 9400 13.8 9.2 150 26.6 16.3 163
Gros Ventre Summit 8750 15.3 9.2 166 26.7 15.6 171
Gunsight Pass 9820 21.2 12.4 171 28.7 17.3 166
Kendall R.S. 7740 2.6 .0 * 31.4 16.4 191
Loomis Park 8240 15.6 6.5 240 35.2 20.1 175
New Fork Lake 8340 -M 1.7 * -M 13.1 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 1.9 6.4 30 29.3 16.5 178
Spring Creek Divide 9000 40.7 23.1 176 44.9 27.5 163
Triple Peak 8500 26.7 13.8 193 44.9 29.6 152
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Basin Index (%) 162 168
LOWER GREEN RIVER
Blacks Fork Jct 8869 .2 -M * 19.0 -M *
Buck Pasture 9632 -M -M * -M -M *
EF Blacks Fork GS 9360 -M -M * -M -M *
Hams Fork 7840 .0 .0 * 24.0 14.1 170
Hewinta 9500 -M .3 * -M 17.3 *
Hickerson Park 9122 .1 .0 * 15.0 13.1 115
Hole-in-Rock 9168 -M .0 * -M 12.6 *
Indian Creek 9425 36.2 21.3 170 45.2 26.5 171
Kelley R.S. 8180 10.2 7.4 138 34.0 21.4 159
Spirit Lk 10235 -M -M * -M -M *
Steel Creek Park 10158 17.4 17.2 101 25.5 20.5 124
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Basin Index (%) 139* 150*
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 21.4 -M *
Bug Lake 7987 -M 11.4 * -M 22.9 *
Burts Miller Ranch 8000 -M -M * -M -M *
Chalk Creek #1 9171 26.7 20.3 132 41.0 30.2 136
Hayden Fork 9130 1.8 4.5 40 32.7 25.3 129
Kelley R.S. 8180 10.2 7.4 138 34.0 21.4 159
Lily Lake 9133 -M 2.8 * -M 20.9 *
Monte Cristo 8932 29.9 20.1 149 44.7 31.1 144
Salt River Summit 7760 6.0 2.7 222 32.0 19.4 165
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Basin Index (%) 136 145
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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.