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 SUNDAY: MAY 15 , 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 -M 1.2 * -M 24.0 *
Black Bear 8170 -M 36.0 * -M 43.8 *
Blind Bull Sum 8650 24.1 22.0 110 19.1 22.8 84
Cottonwood Creek 7670 -M 10.3 * -M 29.5 *
East Rim Divide 7930 -M 3.9 * -M 13.9 *
Grand Targhee 9260 -M 45.1 * -M 36.6 *
Granite Creek 6770 .0 1.2 0* 20.9 22.5 93
Grassy Lake 7265 9.6 22.2 43 38.0 41.2 92
Gros Ventre Summit 8750 2.8 8.6 33 13.2 15.7 84
Gunsight Pass 9820 -M 12.2 * -M 17.4 *
Lewis Lake Divide 7850 9.6 26.2 37 34.0 40.3 84
Phillips Bench 8200 -M 21.9 * -M 32.4 *
Salt River Summit 7760 -M 1.5 * -M 19.5 *
Snake River Station 6920 -M .0 * -M 26.0 *
Spring Creek Divide 9000 -M 22.6 * -M 27.7 *
Thumb Divide 7980 .0 5.1 0 16.3 22.3 73
Togwotee Pass 9580 18.9 24.5 77 28.6 29.1 98
Two Ocean Plateau 9240 -M 29.2 * -M 32.2 *
Willow Creek 8380 -M 19.5 * -M 40.1 *
Younts Peak 8350 .0 13.8 0 16.0 19.0 84
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Basin Index (%) 53* 87*
MADISON-GALLATIN
Black Bear 8170 -M 36.0 * -M 43.8 *
Canyon 7870 .0 5.3 0 14.8 19.4 76
Madison Plateau 7750 8.2 17.2 48 24.8 30.6 81
West Yellowstone 6700 -M .0 * -M 17.0 *
Whiskey Creek 6800 -M 8.6 * -M 23.6 *
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Basin Index (%) 36* 79*
YELLOWSTONE
Beartooth Lake 9360 15.3 22.6 68 19.8 23.7 84
Burnt Mtn 5880 .0 .0 * 15.4 18.8 82
Canyon 7870 .0 5.3 0 14.8 19.4 76
Cole Creek 7850 9.9 17.1 58 -M 19.0 *
Evening Star 9200 19.5 25.3 77 31.5 32.6 97
Fisher Creek 9100 -M 34.1 * -M 37.5 *
Northeast Entrance 7350 .0 .0 * 12.4 15.1 82
Parker Peak 9400 13.1 21.6 61 23.5 21.8 108
Sylvan Lake 8420 4.3 17.0 25 25.9 26.9 96
Thumb Divide 7980 .0 5.1 0 16.3 22.3 73
Two Ocean Plateau 9240 -M 29.2 * -M 32.2 *
White Mill 8700 15.0 24.4 61 22.9 28.3 81
Wolverine 7650 .0 .0 * 13.4 15.1 89
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Basin Index (%) 56 87
WIND RIVER
Burroughs Creek 8750 .3 -M * 17.4 -M *
Castle Creek 8400 .0 -M * 10.4 -M *
Cold Springs 9630 5.5 .2 2750* 16.5 14.0 118
Deer Park 9700 18.7 13.5 139 26.8 25.5 105
Hobbs Park 10100 23.0 15.0 153 26.3 18.6 141
Kirwin 9550 11.1 10.4 107 18.9 15.4 123
Little Warm 9370 3.6 6.1 59 14.7 16.9 87
Owl Creek 8975 .5 .0 * 12.0 9.2 130
South Pass 9040 15.5 10.1 153 21.9 22.1 99
St. Lawrence Alt 8620 2.5 .1 2500* 18.1 13.1 138
Togwotee Pass 9580 18.9 24.5 77 28.6 29.1 98
Townsend Creek 8700 11.1 1.2 925 23.7 16.6 143
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Basin Index (%) 136 115
BIGHORN BASIN
Bald Mtn. 9380 14.8 20.7 71 16.3 21.7 75
Bear Trap Meadow 8200 .1 .0 * 11.0 12.2 90
Bone Springs Div 9350 11.7 15.9 74 15.3 20.3 75
Grave Springs 8550 5.8 6.4 91 11.3 14.7 77
Kirwin 9550 11.1 10.4 107 18.9 15.4 123
Marquette 8760 4.0 -M * 15.6 -M *
Middle Powder 7760 8.4 8.9 94 13.3 15.8 84
Owl Creek 8975 .5 .0 * 12.0 9.2 130
Powder River Pass 9480 3.4 8.3 41 12.0 16.8 71
Shell Creek 9580 12.5 16.6 75 14.0 18.1 77
Timber Creek 7950 .0 .0 * 16.9 11.7 144
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Basin Index (%) 78 90
SHOSHONE RIVER
Blackwater 9780 21.3 24.8 86 27.9 25.3 110
Evening Star 9200 19.5 25.3 77 31.5 32.6 97
Marquette 8760 4.0 -M * 15.6 -M *
Sylvan Road 7120 .0 .0 * 16.8 19.8 85
Younts Peak 8350 .0 13.8 0 16.0 19.0 84
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Basin Index (%) 64 95
POWDER RIVER
Bear Trap Meadow 8200 .1 .0 * 11.0 12.2 90
Cloud Peak Reservoir 9860 11.8 16.3 72 18.3 19.0 96
Grave Springs 8550 5.8 6.4 91 11.3 14.7 77
Hansen Sawmill 8360 .2 .0 * 11.8 12.5 94
Middle Powder 7760 8.4 8.9 94 13.3 15.8 84
Powder River Pass 9480 3.4 8.3 41 12.0 16.8 71
Soldier Park 8720 .0 -M * 11.7 -M *
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Basin Index (%) 74 85
TONGUE RIVER
Big Goose 7990 6.9 8.8 78 14.8 16.6 89
Bone Springs Div 9350 11.7 15.9 74 15.3 20.3 75
Burgess Junction 7880 9.0 10.6 85 14.4 16.6 87
Dome Lake 8880 8.5 9.7 88 16.1 18.5 87
Little Goose 8870 9.5 -M * 17.4 -M *
Sucker Creek 8880 8.6 11.3 76 16.6 19.7 84
Tie Creek 6870 .0 .2 0* 13.4 16.8 80
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Basin Index (%) 79 84
BELLE FOURCHE
Cole Canyon 5910 .0 .0 * 12.1 14.4 84
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Basin Index (%) * 84
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 12.5 16.2 77
North Rapid Creek 6130 .0 .0 * 9.7 14.2 68
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Basin Index (%) * 73
UPPER N. PLATTE
Arapaho Ridge 10960 27.8 21.6 129 31.4 28.2 111
Blackhall Mtn 9820 35.7 -M * 39.6 -M *
Columbine 9160 13.4 8.5 158 31.8 30.2 105
Divide Peak 8880 18.3 10.5 174 34.4 26.0 132
Joe Wright 10120 -M 22.8 * -M 32.2 *
Laprele Creek 8375 2.0 .0 * 17.6 16.4 107
Med Bow 10500 41.6 -M * 42.2 -M *
North French Creek 10130 33.3 32.1 104 37.0 33.0 112
Never Summer 10280 23.2 22.1 105 22.5 -M *
Old Battle 10000 39.0 35.1 111 40.5 41.5 98
Rawah 9020 8.2 1.4 586 24.7 18.8 131
Sage Creek Basin 7850 2.0 .0 * 18.0 17.2 105
Sand Lake 10050 35.0 30.5 115 36.3 31.2 116
South Brush Creek 8440 3.6 1.5 240 21.8 19.6 111
Tower 10500 48.5 49.9 97 48.8 47.2 103
Webber Springs 9250 21.5 16.4 131 34.2 31.7 108
Willow Creek Pass 9540 15.6 11.4 137 20.3 17.0 119
Zirkel 9340 -M 16.7 * 37.9 33.2 114
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Basin Index (%) 121 111
SWEETWATER
Deer Park 9700 18.7 13.5 139 26.8 25.5 105
Larsen Creek 9000 .2 5.0 4 17.9 -M *
South Pass 9040 15.5 10.1 153 21.9 22.1 99
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Basin Index (%) 120 102
LOWER N. PLATTE
Casper Mtn. 7900 14.9 9.1 164 22.8 19.9 115
Laprele Creek 8375 2.0 .0 * 17.6 16.4 107
Reno Hill 8400 14.4 7.8 185 25.6 20.8 123
Windy Peak 7900 3.4 .0 * 18.3 14.2 129
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Basin Index (%) 205 118
LARAMIE RIVER
Brooklyn Lake 10240 24.0 19.7 122 31.5 26.6 118
Cinnabar Park 9574 21.5 15.3 141 31.1 29.2 107
Crow Creek 8330 -M .0 * -M 14.9 *
Deadman Hill 10220 22.5 18.3 123 26.4 22.4 118
Rawah 9020 8.2 1.4 586 24.7 18.8 131
Roach 9700 20.7 13.9 149 30.2 24.0 126
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Basin Index (%) 141 119
S. PLATTE
Black Mountain 8920 7.6 -M * 23.2 -M *
Crow Creek 8330 -M .0 * -M 14.9 *
Deadman Hill 10220 22.5 18.3 123 26.4 22.4 118
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Basin Index (%) 123* 118*
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * 23.8 18.4 129
Divide Peak 8880 18.3 10.5 174 34.4 26.0 132
Elk River 8700 8.7 3.3 264 23.6 24.2 98
Little Snake River 8915 23.6 18.0 131 42.3 34.9 121
Old Battle 10000 39.0 35.1 111 40.5 41.5 98
Sage Creek Basin 7850 2.0 .0 * 18.0 17.2 105
Sandstone RS 8150 3.7 .0 * 20.1 22.2 91
Whiskey Park 8950 31.4 24.6 128 38.4 33.5 115
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Basin Index (%) 138 111
UPPER GREEN RIVER
Big Sandy Opening 9080 6.5 7.6 86 16.6 16.5 101
Blind Bull Sum 8650 24.1 22.0 110 19.1 22.8 84
East Rim Divide 7930 -M 3.9 * -M 13.9 *
Elkhart Park G.S. 9400 3.8 8.5 45 15.0 16.4 91
Gros Ventre Summit 8750 2.8 8.6 33 13.2 15.7 84
Gunsight Pass 9820 -M 12.2 * -M 17.4 *
Kendall R.S. 7740 -M .0 * 14.9 16.5 90
Loomis Park 8240 -M 5.9 * -M 20.2 *
New Fork Lake 8340 .1 1.1 9 14.8 13.2 112
Pocket Creek 9360 5.5 -M * 13.8 -M *
Snider Basin 8060 .0 4.8 0 17.5 16.6 105
Spring Creek Divide 9000 -M 22.6 * -M 27.7 *
Triple Peak 8500 10.5 12.7 83 31.4 29.8 105
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Basin Index (%) 73 97
LOWER GREEN RIVER
Blacks Fork Jct 8870 1.0 -M * 16.9 -M *
Buck Pasture 9700 8.8 -M * 23.3 -M *
EF Blacks Fork GS 9360 3.0 -M * 18.1 -M *
Hams Fork 7840 .0 .0 * 14.5 14.2 102
Hewinta 9519 4.7 .1 4700* 18.8 17.5 107
Hickerson Park 9145 5.2 .0 * 19.5 13.2 148
Hole-in-Rock 9150 -M .0 * 18.2 12.7 143
Indian Creek 9425 15.5 21.2 73 23.0 26.6 86
Kelley R.S. 8180 -M 6.4 * -M 21.5 *
Spirit Lk 10235 19.0 -M * 26.4 -M *
Steel Creek Park 10200 21.0 16.5 127 26.5 20.7 128
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Basin Index (%) 123* 115
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 16.6 -M *
Bug Lake 7950 3.7 10.2 36 22.5 23.1 97
Burts Miller Ranch 8000 .0 -M * 8.8 -M *
Chalk Creek #1 8993 12.2 19.4 63 27.1 30.4 89
Hayden Fork 9212 .0 3.1 0 24.5 25.5 96
Kelley R.S. 8180 -M 6.4 * -M 21.5 *
Lily Lake 9156 4.9 1.2 408* 19.6 21.0 93
Monte Cristo 8960 16.4 19.0 86 32.5 31.2 104
Salt River Summit 7760 -M 1.5 * -M 19.5 *
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Basin Index (%) 70* 96
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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.