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 WEDNESDAY: MAY 11 , 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 3.9 0 21.6 23.7 91
Black Bear 8170 25.4 36.8 69 37.5 43.2 87
Blind Bull Sum 8650 25.6 22.4 114 18.9 22.3 85
Cottonwood Creek 7670 11.7 12.5 94 31.8 29.0 110
East Rim Divide 7930 -M 5.7 * -M 13.6 *
Grand Targhee 9260 38.4 46.3 83 35.8 36.1 99
Granite Creek 6770 -M 4.7 * -M 22.2 *
Grassy Lake 7265 12.5 25.3 49 37.5 40.7 92
Gros Ventre Summit 8750 5.7 9.5 60 13.1 15.5 85
Gunsight Pass 9820 12.2 12.2 100 17.4 17.1 102
Lewis Lake Divide 7850 -M 29.0 * -M 39.9 *
Phillips Bench 8200 13.1 23.0 57 29.3 32.0 92
Salt River Summit 7760 -M 3.9 * -M 19.2 *
Snake River Station 6920 .0 1.8 0 23.9 25.7 93
Spring Creek Divide 9000 23.3 23.5 99 27.8 27.2 102
Thumb Divide 7980 .0 7.9 0 16.0 21.9 73
Togwotee Pass 9580 20.3 25.4 80 28.3 28.7 99
Two Ocean Plateau 9240 21.2 29.5 72 26.6 31.7 84
Willow Creek 8380 15.0 20.8 72 38.6 39.4 98
Younts Peak 8350 .0 15.3 0 15.6 18.6 84
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Basin Index (%) 71 93
MADISON-GALLATIN
Black Bear 8170 25.4 36.8 69 37.5 43.2 87
Canyon 7870 .0 7.1 0 14.9 19.0 78
Madison Plateau 7750 -M 19.6 * -M 30.1 *
West Yellowstone 6700 .0 .0 * 14.7 16.7 88
Whiskey Creek 6800 -M 10.3 * -M 23.2 *
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Basin Index (%) 58* 85
YELLOWSTONE
Beartooth Lake 9360 16.5 23.0 72 19.6 23.2 84
Burnt Mtn 5880 .0 .0 * 14.9 17.8 84
Canyon 7870 .0 7.1 0 14.9 19.0 78
Cole Creek 7850 9.9 17.2 58 15.8 18.3 86
Evening Star 9200 20.3 25.5 80 31.4 32.0 98
Fisher Creek 9100 26.0 34.4 76 27.5 36.8 75
Northeast Entrance 7350 .0 .8 0* 12.3 14.7 84
Parker Peak 9400 14.9 22.1 67 23.3 21.3 109
Sylvan Lake 8420 6.8 18.0 38 25.9 26.5 98
Thumb Divide 7980 .0 7.9 0 16.0 21.9 73
Two Ocean Plateau 9240 21.2 29.5 72 26.6 31.7 84
White Mill 8700 16.5 24.8 67 22.8 27.7 82
Wolverine 7650 .0 .0 * 13.3 14.7 90
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Basin Index (%) 63 86
WIND RIVER
Burroughs Creek 8750 1.9 -M * 16.5 -M *
Castle Creek 8400 .0 -M * 10.3 -M *
Cold Springs 9630 7.4 1.2 617 16.3 13.6 120
Deer Park 9700 20.6 14.4 143 26.6 24.9 107
Hobbs Park 10100 23.4 15.8 148 26.3 18.0 146
Kirwin 9550 12.8 10.9 117 18.7 15.0 125
Little Warm 9370 6.3 6.6 95 14.4 16.4 88
Owl Creek 8975 1.4 .5 280* 11.8 8.8 134
South Pass 9040 17.5 11.4 154 21.7 21.5 101
St. Lawrence Alt 8620 4.3 .8 538 17.9 12.6 142
Togwotee Pass 9580 20.3 25.4 80 28.3 28.7 99
Townsend Creek 8700 12.9 3.4 379 23.5 16.0 147
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Basin Index (%) 140 117
BIGHORN BASIN
Bald Mtn. 9380 14.9 20.7 72 15.9 21.2 75
Bear Trap Meadow 8200 .2 .0 * 10.8 11.8 92
Bone Springs Div 9350 12.1 16.6 73 15.0 19.9 75
Grave Springs 8550 6.3 7.5 84 11.2 14.4 78
Kirwin 9550 12.8 10.9 117 18.7 15.0 125
Marquette 8760 4.7 -M * 15.6 -M *
Middle Powder 7760 8.7 10.5 83 13.1 15.5 85
Owl Creek 8975 1.4 .5 280* 11.8 8.8 134
Powder River Pass 9480 4.0 9.0 44 11.7 16.4 71
Shell Creek 9580 12.7 16.8 76 13.6 17.7 77
Timber Creek 7950 1.0 1.3 77 16.8 11.2 150
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Basin Index (%) 79 91
SHOSHONE RIVER
Blackwater 9780 21.8 24.6 89 27.9 24.7 113
Evening Star 9200 20.3 25.5 80 31.4 32.0 98
Marquette 8760 4.7 -M * 15.6 -M *
Sylvan Road 7120 .0 1.2 0 16.9 19.4 87
Younts Peak 8350 .0 15.3 0 15.6 18.6 84
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Basin Index (%) 63 97
POWDER RIVER
Bear Trap Meadow 8200 .2 .0 * 10.8 11.8 92
Cloud Peak Reservoir 9860 12.6 16.8 75 18.0 18.4 98
Grave Springs 8550 6.3 7.5 84 11.2 14.4 78
Hansen Sawmill 8360 .0 1.0 0 11.7 12.0 98
Middle Powder 7760 8.7 10.5 83 13.1 15.5 85
Powder River Pass 9480 4.0 9.0 44 11.7 16.4 71
Soldier Park 8720 .2 -M * 11.6 -M *
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Basin Index (%) 71 86
TONGUE RIVER
Big Goose 7990 7.7 10.3 75 14.6 16.0 91
Bone Springs Div 9350 12.1 16.6 73 15.0 19.9 75
Burgess Junction 7880 9.3 11.4 82 14.0 16.2 86
Dome Lake 8880 8.8 11.1 79 15.8 18.1 87
Little Goose 8870 9.8 -M * 17.3 -M *
Sucker Creek 8880 9.2 12.7 72 16.1 19.2 84
Tie Creek 6870 .0 1.2 0 13.2 16.2 81
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Basin Index (%) 74 84
BELLE FOURCHE
Cole Canyon 5910 .0 .0 * 11.7 13.8 85
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Basin Index (%) * 85
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 12.3 15.7 78
North Rapid Creek 6130 .0 .0 * 9.8 13.8 71
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Basin Index (%) * 75
UPPER N. PLATTE
Arapaho Ridge 10960 28.7 22.3 129 31.4 27.6 114
Blackhall Mtn 9820 37.2 -M * 39.9 -M *
Columbine 9160 17.5 11.9 147 31.4 29.7 106
Divide Peak 8880 20.6 13.7 150 34.4 25.6 134
Joe Wright 10120 -M 23.2 * -M 31.5 *
Laprele Creek 8375 4.6 2.0 230 17.3 16.2 107
Med Bow 10500 41.9 -M * 42.2 -M *
North French Creek 10130 34.4 32.7 105 37.0 32.5 114
Never Summer 10280 24.1 22.2 109 22.6 -M *
Old Battle 10000 39.9 36.9 108 40.2 40.9 98
Rawah 9020 10.5 2.4 438 24.6 18.4 134
Sage Creek Basin 7850 7.5 .0 * 18.1 16.9 107
Sand Lake 10050 35.8 31.7 113 36.3 30.7 118
South Brush Creek 8440 6.8 4.4 155 21.7 19.1 114
Tower 10500 48.9 51.2 96 48.0 46.6 103
Webber Springs 9250 23.4 19.0 123 34.2 31.2 110
Willow Creek Pass 9540 17.7 13.0 136 20.3 16.5 123
Zirkel 9340 -M 19.3 * 37.9 32.8 116
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Basin Index (%) 122 113
SWEETWATER
Deer Park 9700 20.6 14.4 143 26.6 24.9 107
Larsen Creek 9000 2.0 6.2 32 17.8 -M *
South Pass 9040 17.5 11.4 154 21.7 21.5 101
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Basin Index (%) 125 104
LOWER N. PLATTE
Casper Mtn. 7900 16.2 11.1 146 22.6 19.6 115
Laprele Creek 8375 4.6 2.0 230 17.3 16.2 107
Reno Hill 8400 15.6 10.0 156 25.3 20.4 124
Windy Peak 7900 5.8 .0 * 18.0 13.9 129
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Basin Index (%) 183 119
LARAMIE RIVER
Brooklyn Lake 10240 26.3 21.1 125 31.4 26.1 120
Cinnabar Park 9574 23.4 17.0 138 31.2 28.4 110
Crow Creek 8330 -M .0 * -M 14.4 *
Deadman Hill 10220 24.3 18.5 131 26.4 21.8 121
Rawah 9020 10.5 2.4 438 24.6 18.4 134
Roach 9700 22.8 15.5 147 30.1 23.4 129
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Basin Index (%) 144 122
S. PLATTE
Black Mountain 8920 11.3 -M * 23.1 -M *
Crow Creek 8330 -M .0 * -M 14.4 *
Deadman Hill 10220 24.3 18.5 131 26.4 21.8 121
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Basin Index (%) 131* 121*
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * 23.2 18.0 129
Divide Peak 8880 20.6 13.7 150 34.4 25.6 134
Elk River 8700 11.7 7.0 167 23.8 23.8 100
Little Snake River 8915 26.0 20.1 129 42.3 34.4 123
Old Battle 10000 39.9 36.9 108 40.2 40.9 98
Sage Creek Basin 7850 7.5 .0 * 18.1 16.9 107
Sandstone RS 8150 6.8 1.3 523* 19.8 21.9 90
Whiskey Park 8950 31.7 26.5 120 38.4 33.0 116
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Basin Index (%) 137 112
UPPER GREEN RIVER
Big Sandy Opening 9080 9.6 8.6 112 16.5 16.2 102
Blind Bull Sum 8650 25.6 22.4 114 18.9 22.3 85
East Rim Divide 7930 -M 5.7 * -M 13.6 *
Elkhart Park G.S. 9400 6.6 9.5 69 15.0 16.0 94
Gros Ventre Summit 8750 5.7 9.5 60 13.1 15.5 85
Gunsight Pass 9820 12.2 12.2 100 17.4 17.1 102
Kendall R.S. 7740 -M .0 * 14.9 16.2 92
Loomis Park 8240 2.8 7.0 40 19.2 19.9 96
New Fork Lake 8340 .0 2.4 0 14.1 12.9 109
Pocket Creek 9360 8.0 -M * 13.7 -M *
Snider Basin 8060 -M 7.2 * -M 16.3 *
Spring Creek Divide 9000 23.3 23.5 99 27.8 27.2 102
Triple Peak 8500 13.7 14.5 94 31.2 29.2 107
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Basin Index (%) 91 98
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 13.9 103
Hewinta 9519 8.0 1.5 533 19.3 17.2 112
Hickerson Park 9145 8.6 .0 * 19.5 12.9 151
Hole-in-Rock 9150 -M .0 * -M 12.4 *
Indian Creek 9425 18.4 21.1 87 22.5 26.2 86
Kelley R.S. 8180 4.8 8.1 59 20.0 21.2 94
Spirit Lk 10235 20.8 -M * 26.3 -M *
Steel Creek Park 10200 22.5 17.6 128 26.6 20.3 131
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Basin Index (%) 128* 109
UPPER BEAR RIVER
Bear River RS 8777 -M -M * -M -M *
Bug Lake 7950 -M 12.0 * -M 22.7 *
Burts Miller Ranch 8000 -M -M * -M -M *
Chalk Creek #1 8993 -M 21.2 * -M 29.9 *
Hayden Fork 9212 -M 5.4 * -M 25.0 *
Kelley R.S. 8180 4.8 8.1 59 20.0 21.2 94
Lily Lake 9156 8.3 4.5 184 19.6 20.7 95
Monte Cristo 8960 -M 21.0 * -M 30.8 *
Salt River Summit 7760 -M 3.9 * -M 19.2 *
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Basin Index (%) 104* 95*
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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.
