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 FRIDAY: MAY 24 , 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 .1 .0 * 25.6 24.9 103
Black Bear 8170 39.1 31.8 123 51.7 45.2 114
Blind Bull Sum 8650 23.0 17.6 131 24.1 23.7 102
Cottonwood Creek 7670 9.8 2.4 408 33.2 30.5 109
East Rim Divide 7930 .0 .0 * 16.3 14.5 112
Grand Targhee 9260 44.2 41.3 107 40.2 37.6 107
Granite Creek 6770 .2 .0 * 25.6 23.3 110
Grassy Lake 7265 -M 13.2 * -M 42.5 *
Gros Ventre Summit 8750 .5 2.8 18 16.2 16.4 99
Gunsight Pass 9820 12.7 8.0 159 20.3 18.0 113
Lewis Lake Divide 7850 21.8 19.4 112 44.7 41.5 108
Phillips Bench 8200 20.0 16.0 125 38.3 33.3 115
Salt River Summit 7640 .2 .0 * 22.1 20.2 109
Snake River Station 6920 .1 .0 * 29.7 27.0 110
Spring Creek Divide 9000 21.6 17.5 123 29.5 28.5 104
Thumb Divide 7980 4.2 .0 * 23.4 23.1 101
Togwotee Pass 9580 24.4 22.6 108 30.9 30.1 103
Two Ocean Plateau 9240 28.7 27.7 104 31.1 33.4 93
Willow Creek 8080 19.5 12.4 157 44.2 41.5 107
Younts Peak 8350 -M 10.2 * -M 20.0 *
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Basin Index (%) 123 107
MADISON-GALLATIN
Black Bear 8170 39.1 31.8 123 51.7 45.2 114
Canyon 7870 3.3 .4 825* 20.0 20.2 99
Madison Plateau 7750 20.5 12.4 165 34.2 32.1 107
West Yellowstone 6700 .1 .0 * 21.4 17.9 120
Whiskey Creek 6800 8.1 3.1 261 26.1 24.7 106
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Basin Index (%) 149 109
YELLOWSTONE
Beartooth Lake 9360 25.2 20.6 122 26.3 24.5 107
Burnt Mtn 5880 .6 .0 * 23.8 19.8 120
Canyon 7870 3.3 .4 825* 20.0 20.2 99
Cole Creek 7850 21.0 14.2 148 -M 20.1 *
Evening Star 9200 27.2 22.2 123 37.1 33.9 109
Fisher Creek 9100 35.2 31.6 111 43.6 38.9 112
Northeast Entrance 7350 .1 .0 * 18.4 15.9 116
Parker Peak 9400 25.4 18.9 134 30.7 22.9 134
Sylvan Lake 8420 14.0 13.2 106 33.0 28.2 117
Thumb Divide 7980 4.2 .0 * 23.4 23.1 101
Two Ocean Plateau 9240 28.7 27.7 104 31.1 33.4 93
White Mill 8700 24.3 21.2 115 26.3 29.4 89
Wolverine 7650 .0 .0 * 17.4 15.8 110
Younts Peak 8350 -M 10.2 * -M 20.0 *
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Basin Index (%) 123 108
WIND RIVER
Burroughs Creek 8750 2.5 -M * 18.1 -M *
Castle Creek 8400 .0 -M * 10.7 -M *
Cold Springs 9630 1.9 .0 * 13.9 14.7 95
Deer Park 9700 14.6 8.6 170 25.4 26.4 96
Hobbs Park 10100 19.6 11.3 173 21.2 19.7 108
Kirwin 9550 7.4 6.5 114 16.4 16.3 101
Little Warm 9370 2.8 .6 467* 11.5 17.8 65
Owl Creek 8975 1.9 .0 * 12.1 10.0 121
South Pass 9040 11.2 3.3 339 19.3 22.8 85
St. Lawrence Alt 8620 -M .0 * -M 13.8 *
Togwotee Pass 9580 24.4 22.6 108 30.9 30.1 103
Townsend Creek 8700 8.6 .0 * 20.0 17.5 114
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Basin Index (%) 175* 97
BIGHORN BASIN
Bald Mtn. 9380 20.5 17.6 116 19.9 22.6 88
Bear Trap Meadow 8200 1.0 .0 * 11.0 13.1 84
Bone Springs Div 9350 16.1 13.0 124 18.1 21.4 85
Grave Springs 8550 4.0 .1 4000* 13.5 15.4 88
Kirwin 9550 7.4 6.5 114 16.4 16.3 101
Marquette 8760 8.3 -M * 18.3 -M *
Middle Powder 7760 1.5 1.6 94 14.8 16.6 89
Owl Creek 8975 1.9 .0 * 12.1 10.0 121
Powder River Pass 9480 3.3 2.5 132 -M 17.9 *
Shell Creek 9580 16.1 14.1 114 16.4 19.1 86
Timber Creek 7950 2.9 .0 * 13.9 12.7 109
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Basin Index (%) 135 92
SHOSHONE RIVER
Blackwater 9780 28.4 23.4 121 32.8 26.5 124
Evening Star 9200 27.2 22.2 123 37.1 33.9 109
Marquette 8760 8.3 -M * 18.3 -M *
Sylvan Lake 8420 14.0 13.2 106 33.0 28.2 117
Sylvan Road 7120 .1 .0 * 19.3 20.6 94
Younts Peak 8350 -M 10.2 * -M 20.0 *
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Basin Index (%) 119 112
POWDER RIVER
Bear Trap Meadow 8200 1.0 .0 * 11.0 13.1 84
Cloud Peak Reservoir 9860 14.2 12.6 113 18.1 20.3 89
Grave Springs 8550 4.0 .1 4000* 13.5 15.4 88
Hansen Sawmill 8360 2.1 .0 * 13.9 13.4 104
Middle Powder 7760 1.5 1.6 94 14.8 16.6 89
Powder River Pass 9480 3.3 2.5 132 -M 17.9 *
Soldier Park 8720 1.8 -M * 12.2 -M *
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Basin Index (%) 155* 90
TONGUE RIVER
Big Goose 7990 8.7 1.3 669 18.6 17.6 106
Bone Springs Div 9350 16.1 13.0 124 18.1 21.4 85
Burgess Junction 7880 7.5 5.4 139 14.7 17.5 84
Dome Lake 8880 9.0 3.2 281 17.5 19.6 89
Little Goose 8870 11.5 -M * 13.9 -M *
Sucker Creek 8880 11.9 6.3 189 18.7 20.8 90
Tie Creek 6870 2.4 .0 * 18.9 17.9 106
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Basin Index (%) 190 93
BELLE FOURCHE
Blind Park 6890 .1 .0 * 11.1 17.4 64
Cole Canyon 5910 2.4 .0 * 20.6 15.3 135
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Basin Index (%) * 97
CHEYENNE RIVER BASIN
Blind Park 6890 .1 .0 * 11.1 17.4 64
North Rapid Creek 6130 .2 .0 * 11.8 15.0 79
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Basin Index (%) * 71
UPPER N. PLATTE
Arapaho Ridge 10960 26.0 14.7 177 33.6 28.8 117
Blackhall Mtn 9820 29.6 -M * 40.5 -M *
Columbine 9160 9.1 .0 * 35.1 30.9 114
Divide Peak 8880 6.5 2.2 295 29.2 26.7 109
Joe Wright 10120 22.4 19.1 117 37.4 33.2 113
Laprele Creek 8375 .8 .0 * 18.8 17.2 109
Med Bow 10500 41.4 -M * 43.5 -M *
Never Summer 10280 25.0 18.4 136 25.0 -M *
North French Creek 10130 29.9 26.9 111 37.3 34.2 109
Old Battle 10000 40.5 30.7 132 44.6 42.5 105
Rawah 9020 .6 .0 * 21.8 19.1 114
Sage Creek Basin 7850 .1 .0 * 20.2 17.6 115
Sand Lake 10050 31.4 25.8 122 31.2 32.3 97
South Brush Creek 8440 .1 .0 * 16.2 20.4 79
Tower 10500 57.9 45.6 127 56.2 48.3 116
Webber Springs 9250 17.9 7.7 232 38.5 32.4 119
Whiskey Park 8950 22.6 17.5 129 39.6 34.1 116
Willow Creek Pass 9540 14.0 6.8 206 22.0 17.7 124
Zirkel 9340 17.9 3.3 542 45.1 33.6 134
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Basin Index (%) 148 112
SWEETWATER
Deer Park 9700 14.6 8.6 170 25.4 26.4 96
Larsen Creek 9000 .1 2.4 4 17.6 -M *
South Pass 9040 11.2 3.3 339 19.3 22.8 85
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Basin Index (%) 181 91
LOWER N. PLATTE
Casper Mtn. 7900 8.3 1.6 519 20.0 20.9 96
Laprele Creek 8375 .8 .0 * 18.8 17.2 109
Reno Hill 8400 11.4 .2 5700* 25.0 21.8 115
Windy Peak 7900 1.2 .0 * 14.4 15.3 94
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Basin Index (%) 1206* 104
LARAMIE RIVER
Brooklyn Lake 10240 19.4 12.8 152 32.7 27.6 118
Cinnabar Park 9574 14.8 8.5 174 29.8 29.8 100
Crow Creek 8330 -M .0 * 15.0 15.6 96
Deadman Hill 10220 17.9 14.0 128 24.9 23.4 106
Rawah 9020 .6 .0 * 21.8 19.1 114
Roach 9700 10.6 8.3 128 28.2 25.0 113
Windy Peak 7900 1.2 .0 * 14.4 15.3 94
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Basin Index (%) 148 107
S. PLATTE
Black Mountain 8920 .9 -M * 18.7 -M *
Crow Creek 8330 -M .0 * 15.0 15.6 96
Deadman Hill 10220 17.9 14.0 128 24.9 23.4 106
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Basin Index (%) 128* 102
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * 21.5 18.8 114
Divide Peak 8880 6.5 2.2 295 29.2 26.7 109
Elk River 8700 1.2 .0 * 24.5 24.8 99
Little Snake River 8915 18.2 8.8 207 45.2 35.6 127
Old Battle 10000 40.5 30.7 132 44.6 42.5 105
Sage Creek Basin 7850 .1 .0 * 20.2 17.6 115
Sandstone RS 8150 .0 .0 * 22.4 22.7 99
Whiskey Park 8950 22.6 17.5 129 39.6 34.1 116
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Basin Index (%) 151 111
UPPER GREEN RIVER
Big Sandy Opening 9080 7.8 .2 3900* 19.1 17.2 111
Blind Bull Sum 8650 23.0 17.6 131 24.1 23.7 102
East Rim Divide 7930 .0 .0 * 16.3 14.5 112
Elkhart Park G.S. 9400 10.5 3.7 284 19.0 17.1 111
Gros Ventre Summit 8750 .5 2.8 18 16.2 16.4 99
Gunsight Pass 9820 12.7 8.0 159 20.3 18.0 113
Indian Creek 9425 20.8 15.6 133 25.7 27.4 94
Kendall R.S. 7740 .3 .0 * 15.7 17.1 92
Loomis Park 8240 5.1 .1 5100* 22.0 20.9 105
New Fork Lake 8340 .4 .0 * 14.6 13.8 106
Pocket Creek 9360 10.4 -M * 18.6 -M *
Snider Basin 8060 .5 .0 * 17.8 17.1 104
Spring Creek Divide 9000 21.6 17.5 123 29.5 28.5 104
Triple Peak 8500 13.5 4.5 300 32.6 30.7 106
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Basin Index (%) 167 104
LOWER GREEN RIVER
Blacks Fork Jct 8869 .4 -M * 17.4 -M *
Buck Pasture 9632 9.4 -M * 26.8 -M *
EF Blacks Fork GS 9360 .9 -M * 17.6 -M *
Hams Fork 7840 1.3 .0 * 18.5 14.7 126
Hewinta 9500 .1 .0 * 20.0 18.0 111
Hickerson Park 9122 1.5 .0 * 17.1 13.8 124
Hole-in-Rock 9168 1.5 .0 * 16.7 13.4 125
Indian Creek 9425 20.8 15.6 133 25.7 27.4 94
Kelley R.S. 8180 5.2 .3 1733* 22.7 22.2 102
Spirit Lk 10235 13.8 -M * 23.8 -M *
Steel Creek Park 10158 16.4 12.8 128 25.5 21.4 119
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Basin Index (%) 163* 112
UPPER BEAR RIVER
Bear River RS 8777 .6 -M * 20.2 -M *
Bug Lake 7987 10.7 .3 3567* 30.9 23.8 130
Burts Miller Ranch 8000 .2 -M * 11.1 -M *
Chalk Creek #1 9171 19.5 11.9 164 36.9 31.2 118
Hayden Fork 9130 .8 .0 * 29.9 26.2 114
Kelley R.S. 8180 5.2 .3 1733* 22.7 22.2 102
Lily Lake 9133 1.3 .0 * 21.8 21.7 100
Monte Cristo 8932 28.6 10.8 265 40.6 32.0 127
Salt River Summit 7640 .2 .0 * 22.1 20.2 109
Spring Creek Divide 9000 21.6 17.5 123 29.5 28.5 104
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Basin Index (%) 215* 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.
