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 2 , 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 5.3 8.9 60 21.2 22.9 93
Black Bear 8170 30.0 37.4 80 37.1 41.8 89
Blind Bull Sum 8650 25.0 23.0 109 17.7 21.4 83
Cottonwood Creek 7670 17.0 15.0 113 29.0 27.6 105
East Rim Divide 7930 .0 8.2 0 12.5 13.0 96
Grand Targhee 9260 41.9 45.1 93 34.5 34.8 99
Granite Creek 6770 3.7 8.1 46 18.8 21.4 88
Grassy Lake 7265 19.8 28.7 69 36.9 39.4 94
Gros Ventre Summit 8750 9.2 11.5 80 12.0 14.7 82
Gunsight Pass 9820 14.8 12.3 120 16.3 16.1 101
Lewis Lake Divide 7850 20.1 29.9 67 33.2 38.6 86
Phillips Bench 8200 18.4 25.1 73 27.8 30.7 91
Salt River Summit 7760 5.3 7.8 68 17.3 18.4 94
Snake River Station 6920 2.7 6.8 40 23.4 24.8 94
Spring Creek Divide 9000 25.4 24.3 105 25.4 26.3 97
Thumb Divide 7980 2.9 11.9 24 15.9 21.0 76
Togwotee Pass 9580 22.9 24.8 92 27.0 27.4 99
Two Ocean Plateau 9240 26.1 29.8 88 26.1 30.2 86
Willow Creek 8380 22.1 22.6 98 36.5 37.7 97
Younts Peak 8350 3.8 15.6 24 14.6 17.7 82
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Basin Index (%) 80 92
MADISON-GALLATIN
Black Bear 8170 30.0 37.4 80 37.1 41.8 89
Canyon 7870 5.4 10.0 54 14.2 18.1 78
Madison Plateau 7750 16.6 21.2 78 24.4 29.0 84
West Yellowstone 6700 .0 1.2 0 14.7 16.0 92
Whiskey Creek 6800 8.0 14.2 56 17.9 22.4 80
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Basin Index (%) 71 85
YELLOWSTONE
Beartooth Lake 9360 18.4 22.7 81 19.5 22.0 89
Burnt Mtn 5880 .0 .0 * 13.8 16.0 86
Canyon 7870 5.4 10.0 54 14.2 18.1 78
Cole Creek 7850 12.1 16.6 73 15.3 16.5 93
Evening Star 9200 24.9 24.8 100 30.8 30.5 101
Fisher Creek 9100 27.7 32.6 85 27.3 35.2 78
Northeast Entrance 7350 .0 2.4 0 12.2 13.8 88
Parker Peak 9400 19.8 21.2 93 22.8 20.1 113
Sylvan Lake 8420 12.7 19.5 65 25.2 25.2 100
Thumb Divide 7980 2.9 11.9 24 15.9 21.0 76
Two Ocean Plateau 9240 26.1 29.8 88 26.1 30.2 86
White Mill 8700 20.9 23.8 88 22.7 26.4 86
Wolverine 7650 .0 1.9 0 13.3 13.8 96
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Basin Index (%) 79 90
WIND RIVER
Burroughs Creek 8750 6.9 -M * 14.9 -M *
Castle Creek 8400 .0 -M * 8.9 -M *
Cold Springs 9630 7.4 1.2 617 12.8 12.5 102
Deer Park 9700 19.5 15.8 123 22.8 23.5 97
Hobbs Park 10100 20.8 16.0 130 21.5 16.8 128
Kirwin 9550 12.8 10.5 122 16.2 13.9 117
Little Warm 9370 8.1 8.6 94 12.7 15.4 82
Owl Creek 8975 3.1 .8 388 8.8 8.0 110
South Pass 9040 17.0 14.7 116 17.7 20.4 87
St. Lawrence Alt 8620 5.9 2.1 281 13.6 11.6 117
Togwotee Pass 9580 22.9 24.8 92 27.0 27.4 99
Townsend Creek 8700 12.9 7.3 177 18.2 15.0 121
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Basin Index (%) 128 104
BIGHORN BASIN
Bald Mtn. 9380 17.2 20.5 84 14.9 19.8 75
Bear Trap Meadow 8200 3.6 .7 514 9.7 10.7 91
Bone Springs Div 9350 14.6 16.5 88 13.9 18.3 76
Grave Springs 8550 9.3 9.5 98 10.1 13.0 78
Kirwin 9550 12.8 10.5 122 16.2 13.9 117
Marquette 8760 8.5 -M * 14.1 -M *
Middle Powder 7760 13.2 11.5 115 12.0 14.2 85
Owl Creek 8975 3.1 .8 388 8.8 8.0 110
Powder River Pass 9480 8.1 9.2 88 11.4 15.2 75
Shell Creek 9580 14.2 15.9 89 13.0 16.4 79
Timber Creek 7950 5.9 3.0 197 14.2 10.1 141
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Basin Index (%) 104 89
SHOSHONE RIVER
Blackwater 9780 24.2 25.5 95 26.9 23.6 114
Evening Star 9200 24.9 24.8 100 30.8 30.5 101
Marquette 8760 8.5 -M * 14.1 -M *
Sylvan Road 7120 .0 5.2 0 16.3 18.6 88
Younts Peak 8350 3.8 15.6 24 14.6 17.7 82
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Basin Index (%) 74 98
POWDER RIVER
Bear Trap Meadow 8200 3.6 .7 514 9.7 10.7 91
Cloud Peak Reservoir 9860 14.0 16.4 85 17.5 16.8 104
Grave Springs 8550 9.3 9.5 98 10.1 13.0 78
Hansen Sawmill 8360 4.6 2.1 219 10.8 11.0 98
Middle Powder 7760 13.2 11.5 115 12.0 14.2 85
Powder River Pass 9480 8.1 9.2 88 11.4 15.2 75
Soldier Park 8720 1.7 -M * 10.8 -M *
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Basin Index (%) 107 88
TONGUE RIVER
Big Goose 7990 10.1 9.2 110 13.8 14.2 97
Bone Springs Div 9350 14.6 16.5 88 13.9 18.3 76
Burgess Junction 7880 11.6 12.0 97 13.3 14.9 89
Dome Lake 8880 11.1 11.4 97 14.8 16.6 89
Little Goose 8870 12.0 -M * 16.3 -M *
Sucker Creek 8880 11.4 12.0 95 15.4 17.5 88
Tie Creek 6870 .4 2.6 15 12.4 14.6 85
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Basin Index (%) 93 87
BELLE FOURCHE
Cole Canyon 5910 .0 .4 0* 11.3 12.1 93
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Basin Index (%) 0* 93
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .3 0* 12.1 14.5 83
North Rapid Creek 6130 .0 .7 0 9.6 12.4 77
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Basin Index (%) 0 81
UPPER N. PLATTE
Arapaho Ridge 10960 27.6 22.3 124 29.2 26.3 111
Blackhall Mtn 9820 36.1 -M * 36.1 -M *
Columbine 9160 21.0 17.8 118 29.2 28.7 102
Divide Peak 8880 21.2 18.0 118 30.3 24.4 124
Joe Wright 10120 -M 23.1 * -M 30.0 *
Laprele Creek 8375 9.4 5.8 162 15.6 15.1 103
Med Bow 10500 38.9 -M * 37.9 -M *
North French Creek 10130 32.9 32.8 100 33.2 30.8 108
Never Summer 10280 23.3 21.8 107 20.6 -M *
Old Battle 10000 37.8 34.7 109 36.0 39.3 92
Rawah 9020 13.1 5.6 234 22.0 17.3 127
Sage Creek Basin 7850 12.3 1.1 1118* 16.1 16.2 99
Sand Lake 10050 34.1 31.4 109 33.2 29.2 114
South Brush Creek 8440 9.6 8.8 109 18.9 17.9 106
Tower 10500 46.0 50.2 92 44.5 44.9 99
Webber Springs 9250 24.4 21.5 113 31.3 30.1 104
Willow Creek Pass 9540 18.4 14.3 129 18.9 15.8 120
Zirkel 9340 26.3 20.9 126 35.3 31.1 114
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Basin Index (%) 116 107
SWEETWATER
Deer Park 9700 19.5 15.8 123 22.8 23.5 97
Larsen Creek 9000 5.9 8.9 66 16.0 -M *
South Pass 9040 17.0 14.7 116 17.7 20.4 87
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Basin Index (%) 108 92
LOWER N. PLATTE
Casper Mtn. 7900 20.6 13.0 158 20.3 18.1 112
Laprele Creek 8375 9.4 5.8 162 15.6 15.1 103
Reno Hill 8400 19.2 12.4 155 24.1 19.0 127
Windy Peak 7900 10.2 3.7 276 15.7 13.0 121
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Basin Index (%) 170 116
LARAMIE RIVER
Brooklyn Lake 10240 26.4 23.3 113 28.7 24.8 116
Cinnabar Park 9574 23.0 19.2 120 28.4 27.0 105
Crow Creek 8330 8.1 .0 * 20.0 13.5 148
Deadman Hill 10220 24.0 19.1 126 24.4 20.8 117
Rawah 9020 13.1 5.6 234 22.0 17.3 127
Roach 9700 22.8 17.1 133 27.3 22.4 122
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Basin Index (%) 139 120
S. PLATTE
Black Mountain 8920 -M -M * 21.7 -M *
Crow Creek 8330 8.1 .0 * 20.0 13.5 148
Deadman Hill 10220 24.0 19.1 126 24.4 20.8 117
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Basin Index (%) 168* 129
LITTLE SNAKE RIVER
Battle Mountain 7440 4.6 .0 * 19.5 17.2 113
Divide Peak 8880 21.2 18.0 118 30.3 24.4 124
Elk River 8700 14.0 12.9 109 22.2 22.8 97
Little Snake River 8915 25.5 22.1 115 38.1 32.9 116
Old Battle 10000 37.8 34.7 109 36.0 39.3 92
Sage Creek Basin 7850 12.3 1.1 1118* 16.1 16.2 99
Sandstone RS 8150 7.0 5.6 125 15.9 20.8 76
Whiskey Park 8950 29.8 26.6 112 34.3 31.6 109
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Basin Index (%) 126 104
UPPER GREEN RIVER
Big Sandy Opening 9080 11.7 10.2 115 14.5 15.2 95
Blind Bull Sum 8650 25.0 23.0 109 17.7 21.4 83
East Rim Divide 7930 .0 8.2 0 12.5 13.0 96
Elkhart Park G.S. 9400 9.3 11.1 84 13.5 15.1 89
Gros Ventre Summit 8750 9.2 11.5 80 12.0 14.7 82
Gunsight Pass 9820 14.8 12.3 120 16.3 16.1 101
Kendall R.S. 7740 -M 3.8 * 13.0 15.6 83
Loomis Park 8240 7.6 10.8 70 17.8 19.0 94
New Fork Lake 8340 1.6 6.3 25 12.1 12.2 99
Pocket Creek 9360 9.3 -M * 11.9 -M *
Snider Basin 8060 4.5 9.1 49 15.0 15.7 96
Spring Creek Divide 9000 25.4 24.3 105 25.4 26.3 97
Triple Peak 8500 19.0 17.1 111 28.9 28.0 103
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Basin Index (%) 89 94
LOWER GREEN RIVER
Blacks Fork Jct 8870 8.0 -M * 14.8 -M *
Buck Pasture 9700 12.2 -M * 20.3 -M *
EF Blacks Fork GS 9360 8.1 -M * 14.3 -M *
Hams Fork 7840 3.1 2.5 124 12.1 13.2 92
Hewinta 9519 9.3 4.6 202 16.7 16.3 102
Hickerson Park 9145 10.5 3.9 269 16.1 12.1 133
Hole-in-Rock 9150 5.6 2.2 255 15.6 11.6 134
Indian Creek 9425 21.1 22.8 93 20.2 25.1 80
Kelley R.S. 8180 9.7 11.2 87 17.2 20.2 85
Spirit Lk 10235 19.6 -M * 22.7 -M *
Steel Creek Park 10200 20.1 17.2 117 22.9 19.2 119
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Basin Index (%) 123 103
UPPER BEAR RIVER
Bear River RS 8777 .7 -M * 14.4 -M *
Bug Lake 7950 12.8 14.7 87 21.1 21.8 97
Burts Miller Ranch 8000 .0 -M * 7.2 -M *
Chalk Creek #1 8993 17.7 24.0 74 25.3 28.6 88
Hayden Fork 9212 7.3 9.1 80 22.8 23.9 95
Kelley R.S. 8180 9.7 11.2 87 17.2 20.2 85
Lily Lake 9156 10.4 10.0 104 16.7 19.6 85
Monte Cristo 8960 25.2 26.2 96 31.2 29.3 106
Salt River Summit 7760 5.3 7.8 68 17.3 18.4 94
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Basin Index (%) 86 94
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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.