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 20 , 2016
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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 .0 .0 * 22.0 24.5 90
Black Bear 8170 19.4 33.8 57 38.9 44.6 87
Blind Bull Sum 8650 20.9 19.9 105 19.3 23.2 83
Cottonwood Creek 7670 -M 6.3 * -M 30.0 *
East Rim Divide 7930 -M .5 * -M 14.1 *
Grand Targhee 9260 -M 42.3 * -M 36.8 *
Granite Creek 6770 .0 .0 * 21.1 22.9 92
Grassy Lake 7265 5.5 17.4 32 39.2 41.8 94
Gros Ventre Summit 8750 .2 5.6 4 13.5 16.1 84
Gunsight Pass 9820 9.4 10.4 90 18.1 17.7 102
Lewis Lake Divide 7850 5.4 22.4 24 34.5 41.0 84
Phillips Bench 8200 7.9 19.2 41 30.0 32.8 91
Salt River Summit 7760 .0 .0 * 20.3 19.9 102
Snake River Station 6920 .0 .0 * 24.3 26.5 92
Spring Creek Divide 9000 20.6 20.3 101 29.2 28.0 104
Thumb Divide 7980 .0 1.4 0* 16.9 22.8 74
Togwotee Pass 9580 17.7 23.0 77 29.2 29.7 98
Two Ocean Plateau 9240 -M 28.3 * -M 32.8 *
Willow Creek 8380 -M 16.6 * -M 40.8 *
Younts Peak 8350 .0 11.8 0 16.6 19.5 85
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Basin Index (%) 58 91
MADISON-GALLATIN
Black Bear 8170 19.4 33.8 57 38.9 44.6 87
Canyon 7870 .0 2.2 0 14.8 19.9 74
Madison Plateau 7750 5.2 14.3 36 25.6 31.5 81
West Yellowstone 6700 .0 .0 * 15.4 17.5 88
Whiskey Creek 6800 .0 5.6 0 19.2 24.3 79
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Basin Index (%) 44 83
YELLOWSTONE
Beartooth Lake 9360 14.8 21.6 69 20.4 24.1 85
Burnt Mtn 5880 .0 .0 * 17.1 19.1 90
Canyon 7870 .0 2.2 0 14.8 19.9 74
Cole Creek 7850 10.6 16.2 65 18.5 19.5 95
Evening Star 9200 18.4 23.7 78 32.2 33.3 97
Fisher Creek 9100 22.4 32.8 68 28.0 38.3 73
Northeast Entrance 7350 .0 .0 * 12.7 15.5 82
Parker Peak 9400 11.4 19.8 58 24.1 22.4 108
Sylvan Lake 8420 1.0 15.1 7 26.7 27.6 97
Thumb Divide 7980 .0 1.4 0* 16.9 22.8 74
Two Ocean Plateau 9240 -M 28.3 * -M 32.8 *
White Mill 8700 13.4 22.3 60 23.6 28.9 82
Wolverine 7650 .0 .0 * 13.8 15.5 89
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Basin Index (%) 59 87
WIND RIVER
Burroughs Creek 8750 .0 -M * 18.2 -M *
Castle Creek 8400 .0 -M * 11.0 -M *
Cold Springs 9630 5.3 .0 * 17.5 14.4 122
Deer Park 9700 16.8 10.5 160 27.2 25.9 105
Hobbs Park 10100 22.5 13.1 172 27.1 19.4 140
Kirwin 9550 9.4 8.4 112 19.4 15.9 122
Little Warm 9370 1.1 2.7 41 14.9 17.4 86
Owl Creek 8975 .0 .0 * 12.9 9.6 134
South Pass 9040 13.8 6.8 203 22.0 22.4 98
St. Lawrence Alt 8620 1.3 .0 * 19.1 13.5 141
Togwotee Pass 9580 17.7 23.0 77 29.2 29.7 98
Townsend Creek 8700 9.9 .0 * 24.1 17.1 141
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Basin Index (%) 152 115
BIGHORN BASIN
Bald Mtn. 9380 13.6 19.2 71 16.7 22.1 76
Bear Trap Meadow 8200 .0 .0 * 12.2 12.6 97
Bone Springs Div 9350 9.8 14.3 69 15.6 20.8 75
Grave Springs 8550 4.0 2.6 154 12.4 15.0 83
Kirwin 9550 9.4 8.4 112 19.4 15.9 122
Marquette 8760 2.3 -M * 16.1 -M *
Middle Powder 7760 5.9 5.3 111 14.1 16.2 87
Owl Creek 8975 .0 .0 * 12.9 9.6 134
Powder River Pass 9480 1.1 5.4 20 12.5 17.3 72
Shell Creek 9580 11.3 15.3 74 14.3 18.5 77
Timber Creek 7950 .0 .0 * 17.8 12.2 146
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Basin Index (%) 78 92
SHOSHONE RIVER
Blackwater 9780 21.3 24.3 88 28.9 26.0 111
Evening Star 9200 18.4 23.7 78 32.2 33.3 97
Marquette 8760 2.3 -M * 16.1 -M *
Sylvan Road 7120 .0 .0 * 17.3 20.3 85
Younts Peak 8350 .0 11.8 0 16.6 19.5 85
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Basin Index (%) 66 96
POWDER RIVER
Bear Trap Meadow 8200 .0 .0 * 12.2 12.6 97
Cloud Peak Reservoir 9860 11.5 14.8 78 19.4 19.6 99
Grave Springs 8550 4.0 2.6 154 12.4 15.0 83
Hansen Sawmill 8360 .0 .0 * 13.2 12.9 102
Middle Powder 7760 5.9 5.3 111 14.1 16.2 87
Powder River Pass 9480 1.1 5.4 20 12.5 17.3 72
Soldier Park 8720 .0 -M * 13.0 -M *
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Basin Index (%) 80 90
TONGUE RIVER
Big Goose 7990 5.3 4.8 110 15.3 17.2 89
Bone Springs Div 9350 9.8 14.3 69 15.6 20.8 75
Burgess Junction 7880 6.6 8.1 81 14.7 17.0 86
Dome Lake 8880 6.6 6.2 106 16.6 19.0 87
Little Goose 8870 7.8 -M * 17.9 -M *
Sucker Creek 8880 6.4 8.6 74 16.9 20.2 84
Tie Creek 6870 .0 .0 * 13.8 17.2 80
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Basin Index (%) 83 83
BELLE FOURCHE
Cole Canyon 5910 .0 .0 * 12.2 14.9 82
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Basin Index (%) * 82
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 12.6 16.6 76
North Rapid Creek 6130 .0 .0 * 9.9 14.5 68
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Basin Index (%) * 72
UPPER N. PLATTE
Arapaho Ridge 10960 28.1 18.1 155 32.8 28.5 115
Blackhall Mtn 9820 35.1 -M * 41.1 -M *
Columbine 9160 10.2 3.0 340 33.2 30.6 108
Divide Peak 8880 14.3 5.7 251 35.2 26.5 133
Joe Wright 10120 -M 21.1 * -M 32.8 *
Laprele Creek 8375 .0 .0 * 18.0 16.9 107
Med Bow 10500 40.9 -M * 43.0 -M *
North French Creek 10130 32.0 29.6 108 37.7 33.7 112
Never Summer 10280 22.3 20.3 110 23.1 -M *
Old Battle 10000 39.1 32.5 120 41.9 42.1 100
Rawah 9020 5.0 .4 1250* 25.3 18.9 134
Sage Creek Basin 7850 -M .0 * 18.3 17.4 105
Sand Lake 10050 34.0 27.8 122 37.0 31.9 116
South Brush Creek 8440 .0 .0 * 22.8 20.1 113
Tower 10500 48.2 47.7 101 50.0 47.9 104
Webber Springs 9250 20.3 12.0 169 35.6 32.1 111
Willow Creek Pass 9540 14.5 9.3 156 21.3 17.3 123
Zirkel 9340 -M 9.7 * 38.8 33.4 116
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Basin Index (%) 130 113
SWEETWATER
Deer Park 9700 16.8 10.5 160 27.2 25.9 105
Larsen Creek 9000 .2 3.6 6 18.3 -M *
South Pass 9040 13.8 6.8 203 22.0 22.4 98
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Basin Index (%) 147 102
LOWER N. PLATTE
Casper Mtn. 7900 11.7 4.5 260 23.3 20.4 114
Laprele Creek 8375 .0 .0 * 18.0 16.9 107
Reno Hill 8400 11.6 3.6 322 26.2 21.4 122
Windy Peak 7900 .2 .0 * 18.7 14.9 126
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Basin Index (%) 290 117
LARAMIE RIVER
Brooklyn Lake 10240 22.4 16.4 137 32.0 27.2 118
Cinnabar Park 9574 21.0 12.3 171 32.1 29.5 109
Crow Creek 8330 .3 .0 * -M 15.1 *
Deadman Hill 10220 21.9 16.5 133 27.0 23.0 117
Rawah 9020 5.0 .4 1250* 25.3 18.9 134
Roach 9700 19.5 11.5 170 31.2 24.7 126
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Basin Index (%) 158 120
S. PLATTE
Black Mountain 8920 5.7 -M * 23.9 -M *
Crow Creek 8330 .3 .0 * -M 15.1 *
Deadman Hill 10220 21.9 16.5 133 27.0 23.0 117
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Basin Index (%) 135* 117*
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * 24.5 18.6 132
Divide Peak 8880 14.3 5.7 251 35.2 26.5 133
Elk River 8700 5.7 .0 * 24.5 24.6 100
Little Snake River 8915 21.3 13.3 160 43.4 35.2 123
Old Battle 10000 39.1 32.5 120 41.9 42.1 100
Sage Creek Basin 7850 -M .0 * 18.3 17.4 105
Sandstone RS 8150 .0 .0 * 20.8 22.5 92
Whiskey Park 8950 34.6 21.9 158 39.7 33.8 117
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Basin Index (%) 157 113
UPPER GREEN RIVER
Big Sandy Opening 9080 3.5 3.1 113 17.3 16.8 103
Blind Bull Sum 8650 20.9 19.9 105 19.3 23.2 83
East Rim Divide 7930 -M .5 * -M 14.1 *
Elkhart Park G.S. 9400 1.3 5.7 23 15.7 16.7 94
Gros Ventre Summit 8750 .2 5.6 4 13.5 16.1 84
Gunsight Pass 9820 9.4 10.4 90 18.1 17.7 102
Kendall R.S. 7740 -M .0 * 15.1 16.8 90
Loomis Park 8240 -M 2.6 * -M 20.5 *
New Fork Lake 8340 .2 .0 * 14.8 13.5 110
Pocket Creek 9360 3.6 -M * 14.7 -M *
Snider Basin 8060 .2 .4 50* 18.7 16.8 111
Spring Creek Divide 9000 20.6 20.3 101 29.2 28.0 104
Triple Peak 8500 7.8 8.4 93 32.0 30.2 106
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Basin Index (%) 87 99
LOWER GREEN RIVER
Blacks Fork Jct 8870 1.0 -M * 18.1 -M *
Buck Pasture 9700 6.7 -M * 24.2 -M *
EF Blacks Fork GS 9360 1.2 -M * 19.7 -M *
Hams Fork 7840 .0 .0 * 16.0 14.4 111
Hewinta 9519 2.5 .0 * 20.0 17.7 113
Hickerson Park 9145 2.6 .0 * 20.3 13.4 151
Hole-in-Rock 9150 .1 .0 * 20.0 13.0 154
Indian Creek 9425 15.3 18.5 83 24.3 27.0 90
Kelley R.S. 8180 .2 2.8 7 21.7 21.8 100
Spirit Lk 10235 18.7 -M * 27.7 -M *
Steel Creek Park 10200 21.4 14.7 146 28.0 21.0 133
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Basin Index (%) 117* 117
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 18.0 -M *
Bug Lake 7950 .5 4.9 10 23.9 23.5 102
Burts Miller Ranch 8000 .0 -M * 9.4 -M *
Chalk Creek #1 8993 11.1 15.6 71 29.0 30.8 94
Hayden Fork 9212 .1 .0 * 26.1 25.8 101
Kelley R.S. 8180 .2 2.8 7 21.7 21.8 100
Lily Lake 9156 2.1 .0 * 20.9 21.3 98
Monte Cristo 8960 14.4 14.9 97 33.4 31.6 106
Salt River Summit 7760 .0 .0 * 20.3 19.9 102
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Basin Index (%) 74* 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.
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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.