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 MONDAY: MAY 9 , 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 5.0 0 21.5 23.6 91
Black Bear 8170 25.7 36.8 70 37.3 42.9 87
Blind Bull Sum 8650 -M 22.5 * -M 22.1 *
Cottonwood Creek 7670 12.4 13.1 95 31.3 28.6 109
East Rim Divide 7930 .0 6.2 0 13.6 13.4 101
Grand Targhee 9260 38.7 46.4 83 34.9 35.9 97
Granite Creek 6770 .0 5.9 0 20.6 22.0 94
Grassy Lake 7265 13.2 26.4 50 37.0 40.4 92
Gros Ventre Summit 8750 6.4 9.8 65 13.0 15.2 86
Gunsight Pass 9820 12.5 11.9 105 17.6 16.8 105
Lewis Lake Divide 7850 -M 29.5 * -M 39.6 *
Phillips Bench 8200 14.0 23.3 60 29.0 31.7 91
Salt River Summit 7760 -M 5.1 * -M 19.0 *
Snake River Station 6920 .0 3.1 0 23.5 25.5 92
Spring Creek Divide 9000 24.1 23.8 101 27.6 27.0 102
Thumb Divide 7980 .0 8.9 0 16.0 21.7 74
Togwotee Pass 9580 20.3 25.3 80 27.9 28.4 98
Two Ocean Plateau 9240 21.7 29.7 73 26.2 31.1 84
Willow Creek 8380 15.9 21.3 75 38.1 39.0 98
Younts Peak 8350 .0 15.5 0 15.9 18.4 86
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Basin Index (%) 66 93
MADISON-GALLATIN
Black Bear 8170 25.7 36.8 70 37.3 42.9 87
Canyon 7870 .0 7.7 0 14.7 18.8 78
Madison Plateau 7750 11.4 20.4 56 24.3 29.9 81
West Yellowstone 6700 .1 .0 * 14.5 16.6 87
Whiskey Creek 6800 4.0 11.1 36 18.2 23.0 79
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Basin Index (%) 54 83
YELLOWSTONE
Beartooth Lake 9360 16.6 23.0 72 19.6 23.0 85
Burnt Mtn 5880 .0 .0 * 13.8 17.0 81
Canyon 7870 .0 7.7 0 14.7 18.8 78
Cole Creek 7850 9.8 17.1 57 15.3 17.8 86
Evening Star 9200 20.4 25.3 81 31.2 31.7 98
Fisher Creek 9100 24.7 34.0 73 27.3 36.5 75
Northeast Entrance 7350 .0 1.0 0 12.3 14.5 85
Parker Peak 9400 15.2 21.8 70 23.0 21.1 109
Sylvan Lake 8420 7.2 18.1 40 25.3 26.2 97
Thumb Divide 7980 .0 8.9 0 16.0 21.7 74
Two Ocean Plateau 9240 21.7 29.7 73 26.2 31.1 84
White Mill 8700 16.9 24.6 69 22.8 27.4 83
Wolverine 7650 .0 .4 0* 13.1 14.5 90
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Basin Index (%) 63 86
WIND RIVER
Burroughs Creek 8750 3.6 -M * 16.6 -M *
Castle Creek 8400 .0 -M * 10.3 -M *
Cold Springs 9630 8.1 1.7 476 16.2 13.3 122
Deer Park 9700 21.0 14.5 145 26.5 24.4 109
Hobbs Park 10100 23.9 15.9 150 26.2 17.7 148
Kirwin 9550 13.3 10.9 122 18.6 14.7 127
Little Warm 9370 6.7 6.7 100 14.5 16.1 90
Owl Creek 8975 1.6 .6 267 11.6 8.5 136
South Pass 9040 18.1 12.2 148 21.4 21.2 101
St. Lawrence Alt 8620 5.4 1.4 386 17.9 12.3 146
Togwotee Pass 9580 20.3 25.3 80 27.9 28.4 98
Townsend Creek 8700 13.6 4.4 309 23.2 15.7 148
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Basin Index (%) 141 118
BIGHORN BASIN
Bald Mtn. 9380 13.7 20.5 67 15.1 20.9 72
Bear Trap Meadow 8200 .0 .2 0* 10.2 11.5 89
Bone Springs Div 9350 11.5 16.5 70 14.2 19.5 73
Grave Springs 8550 6.5 7.9 82 10.7 14.0 76
Kirwin 9550 13.3 10.9 122 18.6 14.7 127
Marquette 8760 5.0 -M * 14.9 -M *
Middle Powder 7760 8.4 11.0 76 12.5 15.2 82
Owl Creek 8975 1.6 .6 267 11.6 8.5 136
Powder River Pass 9480 4.1 9.0 46 11.5 16.1 71
Shell Creek 9580 12.0 16.7 72 13.3 17.5 76
Timber Creek 7950 1.3 1.7 76 16.2 10.8 150
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Basin Index (%) 76 90
SHOSHONE RIVER
Blackwater 9780 21.4 25.0 86 27.5 24.4 113
Evening Star 9200 20.4 25.3 81 31.2 31.7 98
Marquette 8760 5.0 -M * 14.9 -M *
Sylvan Road 7120 .0 1.9 0 16.1 19.2 84
Younts Peak 8350 .0 15.5 0 15.9 18.4 86
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Basin Index (%) 62 97
POWDER RIVER
Bear Trap Meadow 8200 .0 .2 0* 10.2 11.5 89
Cloud Peak Reservoir 9860 12.4 16.7 74 17.8 18.0 99
Grave Springs 8550 6.5 7.9 82 10.7 14.0 76
Hansen Sawmill 8360 .0 1.4 0 11.5 11.8 97
Middle Powder 7760 8.4 11.0 76 12.5 15.2 82
Powder River Pass 9480 4.1 9.0 46 11.5 16.1 71
Soldier Park 8720 .0 -M * 11.4 -M *
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Basin Index (%) 68 86
TONGUE RIVER
Big Goose 7990 7.3 10.4 70 14.0 15.6 90
Bone Springs Div 9350 11.5 16.5 70 14.2 19.5 73
Burgess Junction 7880 9.0 11.5 78 13.6 15.9 86
Dome Lake 8880 8.7 11.2 78 15.1 17.8 85
Little Goose 8870 9.5 -M * 16.6 -M *
Sucker Creek 8880 8.8 12.5 70 15.5 18.8 82
Tie Creek 6870 .0 1.7 0 12.4 15.7 79
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Basin Index (%) 71 82
BELLE FOURCHE
Cole Canyon 5910 .0 .0 * 11.4 13.4 85
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Basin Index (%) * 85
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 12.2 15.3 80
North Rapid Creek 6130 .0 .0 * 9.7 13.2 73
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Basin Index (%) * 77
UPPER N. PLATTE
Arapaho Ridge 10960 28.0 22.4 125 30.7 27.3 112
Blackhall Mtn 9820 36.8 -M * 39.0 -M *
Columbine 9160 17.5 13.5 130 30.7 29.5 104
Divide Peak 8880 20.3 14.9 136 33.6 25.4 132
Joe Wright 10120 -M 23.0 * -M 31.2 *
Laprele Creek 8375 5.7 3.4 168 17.4 16.0 109
Med Bow 10500 41.1 -M * 41.1 -M *
North French Creek 10130 33.5 32.8 102 35.9 32.2 111
Never Summer 10280 23.3 22.1 105 21.9 -M *
Old Battle 10000 -M 36.6 * 38.2 40.7 94
Rawah 9020 10.5 3.0 350 24.0 18.0 133
Sage Creek Basin 7850 8.0 .0 * 17.9 16.8 107
Sand Lake 10050 35.4 31.8 111 35.6 30.3 117
South Brush Creek 8440 7.0 5.8 121 21.0 18.9 111
Tower 10500 47.7 51.4 93 46.5 46.2 101
Webber Springs 9250 23.2 19.8 117 33.5 31.0 108
Willow Creek Pass 9540 17.8 13.7 130 19.9 16.4 121
Zirkel 9340 -M 19.9 * 37.1 32.2 115
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Basin Index (%) 118 111
SWEETWATER
Deer Park 9700 21.0 14.5 145 26.5 24.4 109
Larsen Creek 9000 3.2 6.8 47 17.8 -M *
South Pass 9040 18.1 12.2 148 21.4 21.2 101
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Basin Index (%) 126 105
LOWER N. PLATTE
Casper Mtn. 7900 17.1 11.7 146 22.4 19.3 116
Laprele Creek 8375 5.7 3.4 168 17.4 16.0 109
Reno Hill 8400 16.4 11.0 149 25.2 20.0 126
Windy Peak 7900 6.8 1.2 567 18.0 13.8 130
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Basin Index (%) 168 120
LARAMIE RIVER
Brooklyn Lake 10240 26.2 21.7 121 30.8 25.8 119
Cinnabar Park 9574 23.3 17.8 131 30.6 28.2 109
Crow Creek 8330 -M .0 * -M 14.2 *
Deadman Hill 10220 23.9 18.6 128 25.9 21.6 120
Rawah 9020 10.5 3.0 350 24.0 18.0 133
Roach 9700 22.6 16.2 140 29.4 23.2 127
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Basin Index (%) 138 120
S. PLATTE
Black Mountain 8920 12.2 -M * 23.0 -M *
Crow Creek 8330 -M .0 * -M 14.2 *
Deadman Hill 10220 23.9 18.6 128 25.9 21.6 120
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Basin Index (%) 128* 120*
LITTLE SNAKE RIVER
Battle Mountain 7440 -M .0 * -M 17.8 *
Divide Peak 8880 20.3 14.9 136 33.6 25.4 132
Elk River 8700 11.9 8.6 138 23.4 23.6 99
Little Snake River 8915 -M 20.7 * 41.5 34.3 121
Old Battle 10000 -M 36.6 * 38.2 40.7 94
Sage Creek Basin 7850 8.0 .0 * 17.9 16.8 107
Sandstone RS 8150 6.9 2.2 314 -M 21.6 *
Whiskey Park 8950 31.8 26.9 118 37.6 32.8 115
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Basin Index (%) 150 111
UPPER GREEN RIVER
Big Sandy Opening 9080 10.4 8.6 121 16.6 16.0 104
Blind Bull Sum 8650 -M 22.5 * -M 22.1 *
East Rim Divide 7930 .0 6.2 0 13.6 13.4 101
Elkhart Park G.S. 9400 7.3 9.7 75 14.9 15.8 94
Gros Ventre Summit 8750 6.4 9.8 65 13.0 15.2 86
Gunsight Pass 9820 12.5 11.9 105 17.6 16.8 105
Kendall R.S. 7740 .0 .0 * 14.8 16.1 92
Loomis Park 8240 3.8 7.6 50 19.1 19.7 97
New Fork Lake 8340 .3 3.0 10 14.0 12.7 110
Pocket Creek 9360 8.9 -M * 13.7 -M *
Snider Basin 8060 .1 7.5 1 17.5 16.1 109
Spring Creek Divide 9000 24.1 23.8 101 27.6 27.0 102
Triple Peak 8500 14.6 15.1 97 30.7 29.0 106
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Basin Index (%) 77 101
LOWER GREEN RIVER
Blacks Fork Jct 8870 -M -M * -M -M *
Buck Pasture 9700 -M -M * -M -M *
EF Blacks Fork GS 9360 -M -M * -M -M *
Hams Fork 7840 .0 .2 0* 14.3 13.7 104
Hewinta 9519 -M 2.4 * -M 17.0 *
Hickerson Park 9145 9.2 .5 1840* 18.6 12.7 146
Hole-in-Rock 9150 3.0 .3 1000* 17.6 12.2 144
Indian Creek 9425 19.0 21.0 90 22.6 25.9 87
Kelley R.S. 8180 5.9 8.6 69 19.9 20.9 95
Spirit Lk 10235 20.8 -M * 25.6 -M *
Steel Creek Park 10200 21.4 17.8 120 25.4 20.0 127
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Basin Index (%) 121* 112
UPPER BEAR RIVER
Bear River RS 8777 .9 -M * 16.2 -M *
Bug Lake 7950 8.4 12.4 68 22.5 22.4 100
Burts Miller Ranch 8000 .3 -M * 8.4 -M *
Chalk Creek #1 8993 15.6 21.9 71 27.0 29.6 91
Hayden Fork 9212 3.9 6.3 62 24.3 24.7 98
Kelley R.S. 8180 5.9 8.6 69 19.9 20.9 95
Lily Lake 9156 8.6 6.2 139 18.9 20.4 93
Monte Cristo 8960 22.0 22.0 100 32.2 30.4 106
Salt River Summit 7760 -M 5.1 * -M 19.0 *
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Basin Index (%) 83 98
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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.