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 SATURDAY: MAY 11 , 2019
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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 7060 8.6 3.9 221 24.6 23.7 104
Black Bear 8170 42.9 36.8 117 49.8 43.2 115
Blind Bull Sum 8650 25.0 22.4 112 21.9 22.3 98
Cottonwood Creek 7670 15.8 12.5 126 30.4 29.0 105
East Rim Divide 7930 .0 5.7 0 14.5 13.6 107
Grand Targhee 9260 49.2 46.3 106 38.5 36.1 107
Granite Creek 6770 8.7 4.7 185 23.7 22.2 107
Grassy Lake 7265 -M 25.3 * -M 40.7 *
Gros Ventre Summit 8750 4.8 9.5 51 14.9 15.5 96
Gunsight Pass 9820 15.3 12.2 125 19.2 17.1 112
Lewis Lake Divide 7850 30.7 29.0 106 43.5 39.9 109
Phillips Bench 8200 25.2 23.0 110 36.2 32.0 113
Salt River Summit 7640 5.7 3.9 146 19.3 19.2 101
Snake River Station 6920 5.3 1.8 294 28.6 25.7 111
Spring Creek Divide 9000 24.0 23.5 102 27.5 27.2 101
Thumb Divide 7980 11.5 7.9 146 22.3 21.9 102
Togwotee Pass 9580 26.4 25.4 104 29.2 28.7 102
Two Ocean Plateau 9240 33.4 29.5 113 30.0 31.7 95
Willow Creek 8080 26.0 20.8 125 41.1 39.4 104
Younts Peak 8350 -M 15.3 * -M 18.7 *
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Basin Index (%) 112 105
MADISON-GALLATIN
Black Bear 8170 42.9 36.8 117 49.8 43.2 115
Canyon 7870 10.8 7.1 152 19.0 19.0 100
Madison Plateau 7750 26.0 19.6 133 32.3 30.1 107
West Yellowstone 6700 .1 .0 * 19.9 16.7 119
Whiskey Creek 6800 13.8 10.3 134 24.7 23.2 106
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Basin Index (%) 127 110
YELLOWSTONE
Beartooth Lake 9360 25.7 23.0 112 24.4 23.2 105
Burnt Mtn 5880 2.0 .0 * 19.7 17.8 111
Canyon 7870 10.8 7.1 152 19.0 19.0 100
Cole Creek 7850 20.8 17.2 121 -M 18.3 *
Evening Star 9200 29.2 25.5 115 35.2 32.0 110
Fisher Creek 9100 36.0 34.4 105 41.4 36.8 112
Northeast Entrance 7350 .1 .8 12* 17.2 14.7 117
Parker Peak 9400 28.6 22.1 129 29.0 21.3 136
Sylvan Lake 8420 19.1 18.0 106 31.8 26.5 120
Thumb Divide 7980 11.5 7.9 146 22.3 21.9 102
Two Ocean Plateau 9240 33.4 29.5 113 30.0 31.7 95
White Mill 8700 27.4 24.8 110 24.7 27.7 89
Wolverine 7650 .2 .0 * 16.0 14.7 109
Younts Peak 8350 -M 15.3 * -M 18.7 *
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Basin Index (%) 116 108
WIND RIVER
Burroughs Creek 8750 7.5 -M * 16.7 -M *
Castle Creek 8400 .0 -M * 9.0 -M *
Cold Springs 9630 4.4 1.2 367 12.1 13.5 90
Deer Park 9700 15.9 14.4 110 23.3 24.9 94
Hobbs Park 10100 19.3 15.8 122 18.1 18.0 101
Kirwin 9550 10.4 10.9 95 14.6 15.0 97
Little Warm 9370 7.8 6.6 118 11.3 16.4 69
Owl Creek 8975 .3 .5 60* 9.9 8.8 112
South Pass 9040 13.4 11.4 118 17.0 21.5 79
St. Lawrence Alt 8620 -M .8 * -M 12.6 *
Togwotee Pass 9580 26.4 25.4 104 29.2 28.7 102
Townsend Creek 8700 9.9 3.4 291 16.5 16.0 103
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Basin Index (%) 120 93
BIGHORN BASIN
Bald Mtn. 9380 20.9 20.7 101 16.8 21.2 79
Bear Trap Meadow 8200 .0 .0 * 8.8 11.8 75
Bone Springs Div 9350 16.9 16.6 102 15.5 19.9 78
Grave Springs 8550 6.5 7.5 87 11.5 14.4 80
Kirwin 9550 10.4 10.9 95 14.6 15.0 97
Marquette 8760 8.4 -M * 13.0 -M *
Middle Powder 7760 5.3 10.5 50 11.0 15.5 71
Owl Creek 8975 .3 .5 60* 9.9 8.8 112
Powder River Pass 9480 7.2 9.0 80 -M 16.4 *
Shell Creek 9580 16.5 16.8 98 13.6 17.7 77
Timber Creek 7950 1.2 1.3 92 10.3 11.2 92
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Basin Index (%) 91 83
SHOSHONE RIVER
Blackwater 9780 29.6 24.6 120 30.3 24.7 123
Evening Star 9200 29.2 25.5 115 35.2 32.0 110
Marquette 8760 8.4 -M * 13.0 -M *
Sylvan Lake 8420 19.1 18.0 106 31.8 26.5 120
Sylvan Road 7120 .0 1.2 0 19.0 19.4 98
Younts Peak 8350 -M 15.3 * -M 18.7 *
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Basin Index (%) 112 113
POWDER RIVER
Bear Trap Meadow 8200 .0 .0 * 8.8 11.8 75
Cloud Peak Reservoir 9860 14.3 16.8 85 14.6 18.4 79
Grave Springs 8550 6.5 7.5 87 11.5 14.4 80
Hansen Sawmill 8360 2.9 1.0 290 10.6 12.0 88
Middle Powder 7760 5.3 10.5 50 11.0 15.5 71
Powder River Pass 9480 7.2 9.0 80 -M 16.4 *
Soldier Park 8720 1.2 -M * 9.7 -M *
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Basin Index (%) 81 78
TONGUE RIVER
Big Goose 7990 9.4 10.3 91 14.8 16.0 92
Bone Springs Div 9350 16.9 16.6 102 15.5 19.9 78
Burgess Junction 7880 9.3 11.4 82 11.9 16.2 73
Dome Lake 8880 9.1 11.1 82 13.3 18.1 73
Little Goose 8870 11.7 -M * 11.2 -M *
Sucker Creek 8880 12.4 12.7 98 14.7 19.2 77
Tie Creek 6870 2.4 1.2 200 15.5 16.2 96
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Basin Index (%) 94 81
BELLE FOURCHE
Blind Park 6890 .1 .0 * 9.8 15.7 62
Cole Canyon 5910 .0 .0 * 15.7 13.8 114
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Basin Index (%) * 86
CHEYENNE RIVER BASIN
Blind Park 6890 .1 .0 * 9.8 15.7 62
North Rapid Creek 6130 .0 .0 * -M 13.8 *
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Basin Index (%) * 62
UPPER N. PLATTE
Arapaho Ridge 10960 25.7 22.3 115 30.8 27.6 112
Blackhall Mtn 9820 33.4 -M * 39.0 -M *
Columbine 9160 14.9 11.9 125 32.8 29.7 110
Divide Peak 8880 13.7 13.7 100 28.1 25.6 110
Joe Wright 10120 22.2 23.2 96 34.9 31.5 111
Laprele Creek 8375 3.7 2.0 185 17.3 16.2 107
Med Bow 10500 41.3 -M * 41.2 -M *
Never Summer 10280 25.1 22.2 113 22.9 -M *
North French Creek 10130 32.0 32.7 98 35.4 32.5 109
Old Battle 10000 40.7 36.9 110 42.9 40.9 105
Rawah 9020 4.8 2.4 200 20.4 18.3 111
Sage Creek Basin 7850 4.4 .0 * 19.3 16.9 114
Sand Lake 10050 32.5 31.7 103 29.9 30.7 97
South Brush Creek 8440 .0 4.4 0 15.2 19.1 80
Tower 10500 56.2 51.2 110 53.0 46.6 114
Webber Springs 9250 22.0 19.0 116 36.5 31.2 117
Whiskey Park 8950 27.7 26.5 105 38.0 33.0 115
Willow Creek Pass 9540 17.8 13.0 137 21.1 16.5 128
Zirkel 9340 24.5 19.3 127 43.2 32.8 132
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Basin Index (%) 111 111
SWEETWATER
Deer Park 9700 15.9 14.4 110 23.3 24.9 94
Larsen Creek 9000 .0 6.2 0 16.9 -M *
South Pass 9040 13.4 11.4 118 17.0 21.5 79
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Basin Index (%) 92 87
LOWER N. PLATTE
Casper Mtn. 7900 10.4 11.1 94 16.4 19.6 84
Laprele Creek 8375 3.7 2.0 185 17.3 16.2 107
Reno Hill 8400 13.9 10.0 139 21.6 20.4 106
Windy Peak 7900 2.1 .0 * 13.6 13.9 98
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Basin Index (%) 130 98
LARAMIE RIVER
Brooklyn Lake 10240 23.4 21.1 111 31.3 26.1 120
Cinnabar Park 9574 18.2 17.0 107 28.3 28.4 100
Crow Creek 8330 .0 .0 * 13.7 14.4 95
Deadman Hill 10220 22.4 18.5 121 24.3 21.8 111
Rawah 9020 4.8 2.4 200 20.4 18.3 111
Roach 9700 15.0 15.5 97 26.6 23.4 114
Windy Peak 7900 2.1 .0 * 13.6 13.9 98
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Basin Index (%) 115 108
S. PLATTE
Black Mountain 8920 6.8 -M * 17.8 -M *
Crow Creek 8330 .0 .0 * 13.7 14.4 95
Deadman Hill 10220 22.4 18.5 121 24.3 21.8 111
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Basin Index (%) 121* 105
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * 20.3 18.0 113
Divide Peak 8880 13.7 13.7 100 28.1 25.6 110
Elk River 8700 10.2 7.0 146 23.4 23.8 98
Little Snake River 8915 24.0 20.1 119 43.4 34.4 126
Old Battle 10000 40.7 36.9 110 42.9 40.9 105
Sage Creek Basin 7850 4.4 .0 * 19.3 16.9 114
Sandstone RS 8150 3.9 1.3 300* 21.9 21.9 100
Whiskey Park 8950 27.7 26.5 105 38.0 33.0 115
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Basin Index (%) 118 111
UPPER GREEN RIVER
Big Sandy Opening 9080 12.3 8.6 143 18.1 16.2 112
Blind Bull Sum 8650 25.0 22.4 112 21.9 22.3 98
East Rim Divide 7930 .0 5.7 0 14.5 13.6 107
Elkhart Park G.S. 9400 13.5 9.5 142 17.2 16.0 108
Gros Ventre Summit 8750 4.8 9.5 51 14.9 15.5 96
Gunsight Pass 9820 15.3 12.2 125 19.2 17.1 112
Indian Creek 9425 21.2 21.1 100 22.0 26.2 84
Kendall R.S. 7740 .9 .0 * 14.2 16.2 88
Loomis Park 8240 10.0 7.0 143 20.3 19.9 102
New Fork Lake 8340 4.3 2.4 179 12.8 12.9 99
Pocket Creek 9360 14.1 -M * 17.9 -M *
Snider Basin 8060 .0 7.2 0 15.7 16.3 96
Spring Creek Divide 9000 24.0 23.5 102 27.5 27.2 101
Triple Peak 8500 18.1 14.5 125 29.9 29.2 102
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Basin Index (%) 104 100
LOWER GREEN RIVER
Blacks Fork Jct 8869 .4 -M * 16.2 -M *
Buck Pasture 9632 14.1 -M * 24.7 -M *
EF Blacks Fork GS 9360 4.9 -M * 15.4 -M *
Hams Fork 7840 .0 .2 0* 15.2 13.9 109
Hewinta 9500 4.6 1.5 307 18.5 17.2 108
Hickerson Park 9122 2.1 .0 * 14.9 12.9 116
Hole-in-Rock 9168 .1 .0 * 14.2 12.4 115
Indian Creek 9425 21.2 21.1 100 22.0 26.2 84
Kelley R.S. 8180 8.5 8.1 105 19.2 21.2 91
Spirit Lk 10235 14.3 -M * 20.8 -M *
Steel Creek Park 10158 17.7 17.6 101 23.3 20.3 115
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Basin Index (%) 112* 103
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 18.6 -M *
Bug Lake 7987 16.7 12.0 139 28.1 22.7 124
Burts Miller Ranch 8000 -M -M * 10.7 -M *
Chalk Creek #1 9171 21.9 21.2 103 34.3 29.9 115
Hayden Fork 9130 7.7 5.4 143 27.8 25.0 111
Kelley R.S. 8180 8.5 8.1 105 19.2 21.2 91
Lily Lake 9133 7.9 4.5 176 20.1 20.7 97
Monte Cristo 8932 30.8 21.0 147 37.2 30.8 121
Salt River Summit 7640 5.7 3.9 146 19.3 19.2 101
Spring Creek Divide 9000 24.0 23.5 102 27.5 27.2 101
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Basin Index (%) 124 109
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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.