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 TUESDAY: MAY 28 , 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 * 26.2 25.3 104
Black Bear 8170 39.6 29.0 137 53.2 45.7 116
Blind Bull Sum 8650 23.0 15.0 153 24.9 24.0 104
Cottonwood Creek 7670 7.9 .0 * 34.0 31.0 110
East Rim Divide 7930 .0 .0 * 17.1 14.8 116
Grand Targhee 9260 46.2 41.0 113 41.5 38.2 109
Granite Creek 6770 .2 .0 * 26.7 23.7 113
Grassy Lake 7265 -M 9.4 * -M 43.1 *
Gros Ventre Summit 8750 .0 .4 0* 16.5 16.7 99
Gunsight Pass 9820 13.0 5.2 250 20.6 18.3 113
Lewis Lake Divide 7850 20.5 15.7 131 45.6 42.2 108
Phillips Bench 8200 19.5 12.8 152 39.0 33.8 115
Salt River Summit 7640 .0 .0 * 22.4 20.5 109
Snake River Station 6920 .0 .0 * 30.5 27.3 112
Spring Creek Divide 9000 21.5 14.3 150 30.0 28.8 104
Thumb Divide 7980 2.3 .0 * 24.0 23.5 102
Togwotee Pass 9580 25.1 21.2 118 31.7 30.7 103
Two Ocean Plateau 9240 29.1 27.0 108 31.7 33.9 94
Willow Creek 8080 18.5 7.5 247 45.2 42.0 108
Younts Peak 8350 -M 7.4 * -M 20.3 *
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Basin Index (%) 141 108
MADISON-GALLATIN
Black Bear 8170 39.6 29.0 137 53.2 45.7 116
Canyon 7870 1.1 .0 * 20.4 20.6 99
Madison Plateau 7750 19.1 9.8 195 35.4 32.6 109
West Yellowstone 6700 .1 .0 * 22.0 18.1 122
Whiskey Creek 6800 5.9 .3 1967* 26.6 25.2 106
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Basin Index (%) 168* 111
YELLOWSTONE
Beartooth Lake 9360 25.7 19.4 132 26.9 24.9 108
Burnt Mtn 5880 .1 .0 * -M 20.5 *
Canyon 7870 1.1 .0 * 20.4 20.6 99
Cole Creek 7850 21.2 12.0 177 23.4 20.8 112
Evening Star 9200 28.0 20.4 137 38.7 34.5 112
Fisher Creek 9100 34.8 29.7 117 44.4 39.5 112
Northeast Entrance 7350 .1 .0 * 19.1 16.3 117
Parker Peak 9400 26.5 16.7 159 31.7 23.4 135
Sylvan Lake 8420 13.8 10.6 130 34.0 28.8 118
Thumb Divide 7980 2.3 .0 * 24.0 23.5 102
Two Ocean Plateau 9240 29.1 27.0 108 31.7 33.9 94
White Mill 8700 24.2 19.5 124 27.1 29.9 91
Wolverine 7650 .0 .0 * 18.4 16.2 114
Younts Peak 8350 -M 7.4 * -M 20.3 *
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Basin Index (%) 133 109
WIND RIVER
Burroughs Creek 8750 2.7 -M * 19.2 -M *
Castle Creek 8400 .7 -M * 12.0 -M *
Cold Springs 9630 2.6 .0 * 15.1 15.1 100
Deer Park 9700 14.4 6.3 229 26.0 26.8 97
Hobbs Park 10100 20.4 8.8 232 22.2 20.1 110
Kirwin 9550 -M 4.3 * 18.2 16.6 110
Little Warm 9370 2.6 .0 * 12.4 18.1 69
Owl Creek 8975 -M .0 * -M 10.4 *
South Pass 9040 11.1 1.1 1009* 19.9 23.3 85
St. Lawrence Alt 8620 -M .0 * -M 14.2 *
Togwotee Pass 9580 25.1 21.2 118 31.7 30.7 103
Townsend Creek 8700 8.5 .0 * 20.8 17.9 116
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Basin Index (%) 226* 99
BIGHORN BASIN
Bald Mtn. 9380 21.9 15.8 139 21.2 23.1 92
Bear Trap Meadow 8200 .5 .0 * 13.1 13.6 96
Bone Springs Div 9350 16.2 11.4 142 18.9 21.9 86
Grave Springs 8550 4.2 .0 * -M 15.9 *
Kirwin 9550 -M 4.3 * 18.2 16.6 110
Marquette 8760 -M -M * 21.2 -M *
Middle Powder 7760 2.5 .0 * 17.4 17.1 102
Owl Creek 8975 -M .0 * -M 10.4 *
Powder River Pass 9480 3.7 .0 * 14.7 18.3 80
Shell Creek 9580 16.5 11.9 139 17.4 19.6 89
Timber Creek 7950 3.8 .0 * 16.8 13.1 128
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Basin Index (%) 177* 96
SHOSHONE RIVER
Blackwater 9780 29.7 22.3 133 34.2 27.0 127
Evening Star 9200 28.0 20.4 137 38.7 34.5 112
Marquette 8760 -M -M * 21.2 -M *
Sylvan Lake 8420 13.8 10.6 130 34.0 28.8 118
Sylvan Road 7120 .1 .0 * 19.9 21.1 94
Younts Peak 8350 -M 7.4 * -M 20.3 *
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Basin Index (%) 134 114
POWDER RIVER
Bear Trap Meadow 8200 .5 .0 * 13.1 13.6 96
Cloud Peak Reservoir 9860 15.6 9.4 166 20.4 20.8 98
Grave Springs 8550 4.2 .0 * -M 15.9 *
Hansen Sawmill 8360 2.5 .0 * -M 13.8 *
Middle Powder 7760 2.5 .0 * 17.4 17.1 102
Powder River Pass 9480 3.7 .0 * 14.7 18.3 80
Soldier Park 8720 2.4 -M * 14.3 -M *
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Basin Index (%) 309* 94
TONGUE RIVER
Big Goose 7990 8.3 .0 * 20.2 18.0 112
Bone Springs Div 9350 16.2 11.4 142 18.9 21.9 86
Burgess Junction 7880 6.5 2.2 295 15.5 17.8 87
Dome Lake 8880 9.5 .0 * 18.9 20.0 94
Little Goose 8870 11.2 -M * 14.8 -M *
Sucker Creek 8880 11.7 3.2 366 20.0 21.1 95
Tie Creek 6870 1.1 .0 * 21.7 18.3 119
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Basin Index (%) 317* 98
BELLE FOURCHE
Blind Park 6890 .0 .0 * 11.4 17.9 64
Cole Canyon 5910 .0 .0 * 21.2 16.0 132
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Basin Index (%) * 96
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 11.4 17.9 64
North Rapid Creek 6130 -M .0 * -M 15.5 *
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Basin Index (%) * 64
UPPER N. PLATTE
Arapaho Ridge 10960 24.9 11.1 224 33.7 29.0 116
Blackhall Mtn 9820 28.4 -M * 41.0 -M *
Columbine 9160 5.6 .0 * 35.3 31.2 113
Divide Peak 8880 4.5 .0 * 29.7 27.1 110
Joe Wright 10120 21.9 16.4 134 37.6 33.9 111
Laprele Creek 8375 .1 .0 * 19.4 17.6 110
Med Bow 10500 41.7 -M * 44.3 -M *
Never Summer 10280 24.2 17.0 142 25.2 -M *
North French Creek 10130 30.0 24.0 125 38.0 34.7 110
Old Battle 10000 40.5 27.3 148 45.9 43.2 106
Rawah 9020 .2 .0 * 22.0 19.3 114
Sage Creek Basin 7850 -M .0 * 20.5 17.7 116
Sand Lake 10050 31.5 22.8 138 31.7 32.7 97
South Brush Creek 8440 .0 .0 * 16.8 20.8 81
Tower 10500 56.9 41.4 137 56.8 48.8 116
Webber Springs 9250 17.2 2.7 637 39.0 32.7 119
Whiskey Park 8950 20.6 11.7 176 40.0 34.5 116
Willow Creek Pass 9540 11.6 3.0 387 22.1 18.1 122
Zirkel 9340 15.2 .0 * 45.4 33.8 134
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Basin Index (%) 172 112
SWEETWATER
Deer Park 9700 14.4 6.3 229 26.0 26.8 97
Larsen Creek 9000 .1 1.2 8* 18.1 -M *
South Pass 9040 11.1 1.1 1009* 19.9 23.3 85
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Basin Index (%) 298* 92
LOWER N. PLATTE
Casper Mtn. 7900 6.9 .1 6900* 21.2 21.4 99
Laprele Creek 8375 .1 .0 * 19.4 17.6 110
Reno Hill 8400 10.1 .0 * 25.7 22.3 115
Windy Peak 7900 .2 .0 * 15.0 15.8 95
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Basin Index (%) 17300* 105
LARAMIE RIVER
Brooklyn Lake 10240 18.3 9.0 203 33.2 28.0 119
Cinnabar Park 9574 14.0 4.6 304 30.2 30.0 101
Crow Creek 8330 .0 .0 * 15.0 15.9 94
Deadman Hill 10220 16.2 11.0 147 25.2 23.7 106
Rawah 9020 .2 .0 * 22.0 19.3 114
Roach 9700 8.6 4.7 183 28.6 25.4 113
Windy Peak 7900 .2 .0 * 15.0 15.8 95
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Basin Index (%) 196 107
S. PLATTE
Black Mountain 8920 .2 -M * 18.9 -M *
Crow Creek 8330 .0 .0 * 15.0 15.9 94
Deadman Hill 10220 16.2 11.0 147 25.2 23.7 106
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Basin Index (%) 147* 102
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * 22.1 19.0 116
Divide Peak 8880 4.5 .0 * 29.7 27.1 110
Elk River 8700 .0 .0 * 25.1 25.2 100
Little Snake River 8915 16.9 5.0 338 45.8 35.8 128
Old Battle 10000 40.5 27.3 148 45.9 43.2 106
Sage Creek Basin 7850 -M .0 * 20.5 17.7 116
Sandstone RS 8150 .0 .0 * 23.0 23.0 100
Whiskey Park 8950 20.6 11.7 176 40.0 34.5 116
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Basin Index (%) 188* 112
UPPER GREEN RIVER
Big Sandy Opening 9080 6.6 .0 * 19.5 17.6 111
Blind Bull Sum 8650 23.0 15.0 153 24.9 24.0 104
East Rim Divide 7930 .0 .0 * 17.1 14.8 116
Elkhart Park G.S. 9400 10.6 1.5 707 19.7 17.5 113
Gros Ventre Summit 8750 .0 .4 0* 16.5 16.7 99
Gunsight Pass 9820 13.0 5.2 250 20.6 18.3 113
Indian Creek 9425 20.8 13.0 160 26.2 27.7 95
Kendall R.S. 7740 .1 .0 * 16.5 17.4 95
Loomis Park 8240 3.8 .0 * 23.0 21.2 108
New Fork Lake 8340 .0 .0 * 15.4 14.2 108
Pocket Creek 9360 10.3 -M * 19.1 -M *
Snider Basin 8060 .0 .0 * 18.1 17.3 105
Spring Creek Divide 9000 21.5 14.3 150 30.0 28.8 104
Triple Peak 8500 -M .7 * -M 31.1 *
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Basin Index (%) 201* 105
LOWER GREEN RIVER
Blacks Fork Jct 8869 .5 -M * 17.9 -M *
Buck Pasture 9632 8.7 -M * 27.3 -M *
EF Blacks Fork GS 9360 .2 -M * 18.0 -M *
Hams Fork 7840 .0 .0 * 18.8 15.0 125
Hewinta 9500 .1 .0 * 20.5 18.3 112
Hickerson Park 9122 .0 .0 * 17.4 14.1 123
Hole-in-Rock 9168 .1 .0 * 17.1 13.7 125
Indian Creek 9425 20.8 13.0 160 26.2 27.7 95
Kelley R.S. 8180 4.6 .0 * 23.4 22.5 104
Spirit Lk 10235 13.5 -M * 24.4 -M *
Steel Creek Park 10158 16.3 10.9 150 26.1 21.7 120
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Basin Index (%) 175* 112
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 20.4 -M *
Bug Lake 7987 9.6 .0 * 31.6 24.2 131
Burts Miller Ranch 8000 .0 -M * 11.3 -M *
Chalk Creek #1 9171 19.2 8.8 218 37.6 31.7 119
Hayden Fork 9130 .0 .0 * 30.5 26.5 115
Kelley R.S. 8180 4.6 .0 * 23.4 22.5 104
Lily Lake 9133 .0 .0 * 22.2 22.1 100
Monte Cristo 8932 28.7 7.1 404 41.4 32.4 128
Salt River Summit 7640 .0 .0 * 22.4 20.5 109
Spring Creek Divide 9000 21.5 14.3 150 30.0 28.8 104
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Basin Index (%) 277* 115
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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.