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 25 , 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 .0 .0 * 25.8 25.0 103
Black Bear 8170 39.8 31.2 128 52.6 45.3 116
Blind Bull Sum 8650 22.8 17.1 133 24.2 23.7 102
Cottonwood Creek 7670 9.8 1.4 700* 33.4 30.6 109
East Rim Divide 7930 .0 .0 * 16.4 14.5 113
Grand Targhee 9260 45.6 41.2 111 41.2 38.0 108
Granite Creek 6770 .2 .0 * 25.9 23.4 111
Grassy Lake 7265 -M 12.2 * -M 42.6 *
Gros Ventre Summit 8750 .2 2.2 9 16.2 16.5 98
Gunsight Pass 9820 12.8 7.3 175 20.4 18.1 113
Lewis Lake Divide 7850 22.2 18.5 120 45.4 41.7 109
Phillips Bench 8200 20.0 15.2 132 38.4 33.4 115
Salt River Summit 7640 .0 .0 * 22.2 20.3 109
Snake River Station 6920 .0 .0 * 30.1 27.1 111
Spring Creek Divide 9000 21.8 16.7 131 29.6 28.6 103
Thumb Divide 7980 4.2 .0 * 23.7 23.2 102
Togwotee Pass 9580 24.8 22.4 111 31.2 30.3 103
Two Ocean Plateau 9240 29.2 27.7 105 31.6 33.5 94
Willow Creek 8080 19.7 11.1 177 44.5 41.6 107
Younts Peak 8350 -M 9.6 * -M 20.0 *
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Basin Index (%) 129 107
MADISON-GALLATIN
Black Bear 8170 39.8 31.2 128 52.6 45.3 116
Canyon 7870 3.2 .4 800* 20.1 20.3 99
Madison Plateau 7750 20.2 12.0 168 34.6 32.2 107
West Yellowstone 6700 .1 .0 * 21.5 18.0 119
Whiskey Creek 6800 7.5 2.4 312 26.2 24.9 105
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Basin Index (%) 154 110
YELLOWSTONE
Beartooth Lake 9360 25.3 20.4 124 26.6 24.6 108
Burnt Mtn 5880 .0 .0 * 24.0 20.0 120
Canyon 7870 3.2 .4 800* 20.1 20.3 99
Cole Creek 7850 21.2 13.6 156 22.5 20.2 111
Evening Star 9200 27.4 21.8 126 37.4 34.1 110
Fisher Creek 9100 35.5 31.2 114 44.0 39.1 113
Northeast Entrance 7350 .1 .0 * 18.7 16.0 117
Parker Peak 9400 26.3 18.5 142 31.4 23.0 137
Sylvan Lake 8420 14.5 12.6 115 33.6 28.3 119
Thumb Divide 7980 4.2 .0 * 23.7 23.2 102
Two Ocean Plateau 9240 29.2 27.7 105 31.6 33.5 94
White Mill 8700 24.5 20.9 117 26.5 29.5 90
Wolverine 7650 .0 .0 * 17.5 15.9 110
Younts Peak 8350 -M 9.6 * -M 20.0 *
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Basin Index (%) 127 109
WIND RIVER
Burroughs Creek 8750 2.6 -M * 18.3 -M *
Castle Creek 8400 .0 -M * 10.7 -M *
Cold Springs 9630 1.7 .0 * 13.9 14.8 94
Deer Park 9700 14.4 8.1 178 25.9 26.6 97
Hobbs Park 10100 19.7 10.7 184 21.5 19.8 109
Kirwin 9550 7.5 6.0 125 16.5 16.3 101
Little Warm 9370 2.8 .4 700* 11.8 17.9 66
Owl Creek 8975 1.9 .0 * 12.1 10.1 120
South Pass 9040 11.1 2.6 427 19.7 22.9 86
St. Lawrence Alt 8620 -M .0 * -M 13.9 *
Togwotee Pass 9580 24.8 22.4 111 31.2 30.3 103
Townsend Creek 8700 8.6 .0 * 20.2 17.6 115
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Basin Index (%) 184* 98
BIGHORN BASIN
Bald Mtn. 9380 21.4 17.2 124 20.6 22.8 90
Bear Trap Meadow 8200 1.4 .0 * 11.4 13.3 86
Bone Springs Div 9350 16.5 12.6 131 18.4 21.6 85
Grave Springs 8550 4.0 .0 * 13.6 15.6 87
Kirwin 9550 7.5 6.0 125 16.5 16.3 101
Marquette 8760 8.4 -M * 18.4 -M *
Middle Powder 7760 3.4 .8 425* 15.4 16.8 92
Owl Creek 8975 1.9 .0 * 12.1 10.1 120
Powder River Pass 9480 3.7 2.0 185 13.9 18.1 77
Shell Creek 9580 16.4 13.7 120 16.8 19.2 88
Timber Creek 7950 2.9 .0 * 13.9 12.8 109
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Basin Index (%) 151* 92
SHOSHONE RIVER
Blackwater 9780 28.6 23.1 124 33.0 26.7 124
Evening Star 9200 27.4 21.8 126 37.4 34.1 110
Marquette 8760 8.4 -M * 18.4 -M *
Sylvan Lake 8420 14.5 12.6 115 33.6 28.3 119
Sylvan Road 7120 .1 .0 * 19.6 20.8 94
Younts Peak 8350 -M 9.6 * -M 20.0 *
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Basin Index (%) 123 112
POWDER RIVER
Bear Trap Meadow 8200 1.4 .0 * 11.4 13.3 86
Cloud Peak Reservoir 9860 14.1 12.0 118 18.3 20.4 90
Grave Springs 8550 4.0 .0 * 13.6 15.6 87
Hansen Sawmill 8360 2.2 .0 * 13.9 13.6 102
Middle Powder 7760 3.4 .8 425* 15.4 16.8 92
Powder River Pass 9480 3.7 2.0 185 13.9 18.1 77
Soldier Park 8720 1.9 -M * 12.2 -M *
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Basin Index (%) 195* 88
TONGUE RIVER
Big Goose 7990 8.6 .9 956* 18.6 17.8 104
Bone Springs Div 9350 16.5 12.6 131 18.4 21.6 85
Burgess Junction 7880 7.4 4.7 157 14.7 17.6 84
Dome Lake 8880 9.0 2.4 375 17.6 19.7 89
Little Goose 8870 11.5 -M * 13.9 -M *
Sucker Creek 8880 11.7 5.5 213 18.7 20.9 89
Tie Creek 6870 2.3 .0 * 19.0 18.1 105
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Basin Index (%) 213 92
BELLE FOURCHE
Blind Park 6890 .0 .0 * 11.2 17.6 64
Cole Canyon 5910 2.0 .0 * 20.7 15.6 133
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Basin Index (%) * 96
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 11.2 17.6 64
North Rapid Creek 6130 -M .0 * 11.8 15.1 78
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Basin Index (%) * 70
UPPER N. PLATTE
Arapaho Ridge 10960 26.1 13.8 189 33.6 28.9 116
Blackhall Mtn 9820 29.5 -M * 40.6 -M *
Columbine 9160 8.8 .0 * 35.2 30.9 114
Divide Peak 8880 6.5 1.3 500* 29.4 26.8 110
Joe Wright 10120 22.3 18.5 121 37.4 33.4 112
Laprele Creek 8375 .3 .0 * 18.9 17.4 109
Med Bow 10500 41.5 -M * 43.6 -M *
Never Summer 10280 24.9 18.0 138 25.0 -M *
North French Creek 10130 30.0 26.2 115 37.4 34.3 109
Old Battle 10000 40.9 30.0 136 45.4 42.7 106
Rawah 9020 .3 .0 * 21.8 19.1 114
Sage Creek Basin 7850 -M .0 * 20.3 17.7 115
Sand Lake 10050 31.7 25.2 126 31.5 32.4 97
South Brush Creek 8440 .0 .0 * 16.3 20.5 80
Tower 10500 57.8 44.8 129 56.6 48.4 117
Webber Springs 9250 18.2 6.5 280 38.9 32.4 120
Whiskey Park 8950 22.3 16.1 139 39.7 34.2 116
Willow Creek Pass 9540 13.8 5.8 238 22.1 17.8 124
Zirkel 9340 17.9 1.9 942* 45.2 33.7 134
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Basin Index (%) 155 113
SWEETWATER
Deer Park 9700 14.4 8.1 178 25.9 26.6 97
Larsen Creek 9000 .0 2.1 0 17.7 -M *
South Pass 9040 11.1 2.6 427 19.7 22.9 86
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Basin Index (%) 199 92
LOWER N. PLATTE
Casper Mtn. 7900 8.3 1.1 755* 20.1 21.0 96
Laprele Creek 8375 .3 .0 * 18.9 17.4 109
Reno Hill 8400 11.1 .0 * 25.0 22.0 114
Windy Peak 7900 .8 .0 * 14.6 15.4 95
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Basin Index (%) 1864* 104
LARAMIE RIVER
Brooklyn Lake 10240 19.4 11.9 163 33.0 27.7 119
Cinnabar Park 9574 14.7 7.5 196 29.8 29.9 100
Crow Creek 8330 .0 .0 * 14.9 15.7 95
Deadman Hill 10220 17.9 13.3 135 25.1 23.4 107
Rawah 9020 .3 .0 * 21.8 19.1 114
Roach 9700 10.5 7.4 142 28.4 25.1 113
Windy Peak 7900 .8 .0 * 14.6 15.4 95
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Basin Index (%) 159 107
S. PLATTE
Black Mountain 8920 .2 -M * 18.7 -M *
Crow Creek 8330 .0 .0 * 14.9 15.7 95
Deadman Hill 10220 17.9 13.3 135 25.1 23.4 107
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Basin Index (%) 135* 102
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * 21.5 18.9 114
Divide Peak 8880 6.5 1.3 500* 29.4 26.8 110
Elk River 8700 .7 .0 * 24.7 24.9 99
Little Snake River 8915 18.3 7.8 235 45.4 35.7 127
Old Battle 10000 40.9 30.0 136 45.4 42.7 106
Sage Creek Basin 7850 -M .0 * 20.3 17.7 115
Sandstone RS 8150 .0 .0 * 22.5 22.8 99
Whiskey Park 8950 22.3 16.1 139 39.7 34.2 116
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Basin Index (%) 161* 111
UPPER GREEN RIVER
Big Sandy Opening 9080 7.7 .0 * 19.2 17.3 111
Blind Bull Sum 8650 22.8 17.1 133 24.2 23.7 102
East Rim Divide 7930 .0 .0 * 16.4 14.5 113
Elkhart Park G.S. 9400 10.7 3.2 334 19.3 17.2 112
Gros Ventre Summit 8750 .2 2.2 9 16.2 16.5 98
Gunsight Pass 9820 12.8 7.3 175 20.4 18.1 113
Indian Creek 9425 20.9 14.9 140 25.8 27.5 94
Kendall R.S. 7740 .1 .0 * 15.8 17.1 92
Loomis Park 8240 4.9 .0 * 22.2 21.0 106
New Fork Lake 8340 .3 .0 * 14.8 13.9 106
Pocket Creek 9360 10.8 -M * 18.8 -M *
Snider Basin 8060 .0 .0 * 17.9 17.1 105
Spring Creek Divide 9000 21.8 16.7 131 29.6 28.6 103
Triple Peak 8500 -M 3.5 * -M 30.8 *
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Basin Index (%) 166* 104
LOWER GREEN RIVER
Blacks Fork Jct 8869 .0 -M * 17.4 -M *
Buck Pasture 9632 9.4 -M * 26.9 -M *
EF Blacks Fork GS 9360 .7 -M * 17.6 -M *
Hams Fork 7840 .6 .0 * 18.5 14.8 125
Hewinta 9500 .0 .0 * 20.0 18.1 110
Hickerson Park 9122 1.4 .0 * 17.1 13.9 123
Hole-in-Rock 9168 1.5 .0 * 16.7 13.5 124
Indian Creek 9425 20.9 14.9 140 25.8 27.5 94
Kelley R.S. 8180 5.3 .0 * 22.9 22.3 103
Spirit Lk 10235 13.7 -M * 23.9 -M *
Steel Creek Park 10158 16.5 12.2 135 25.5 21.4 119
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Basin Index (%) 170* 111
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 20.2 -M *
Bug Lake 7987 11.2 .0 * 31.4 23.9 131
Burts Miller Ranch 8000 .0 -M * 11.2 -M *
Chalk Creek #1 9171 19.9 11.1 179 37.3 31.4 119
Hayden Fork 9130 .5 .0 * 30.0 26.3 114
Kelley R.S. 8180 5.3 .0 * 22.9 22.3 103
Lily Lake 9133 1.3 .0 * 22.0 21.8 101
Monte Cristo 8932 29.3 9.6 305 41.1 32.1 128
Salt River Summit 7640 .0 .0 * 22.2 20.3 109
Spring Creek Divide 9000 21.8 16.7 131 29.6 28.6 103
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Basin Index (%) 239* 114
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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.
