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 THURSDAY: MAY 23 , 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 * 25.5 24.8 103
Black Bear 8170 39.0 32.3 121 51.6 45.0 115
Blind Bull Sum 8650 23.1 18.3 126 23.8 23.5 101
Cottonwood Creek 7670 9.6 3.4 282 32.9 30.4 108
East Rim Divide 7930 -M .0 * 16.0 14.4 111
Grand Targhee 9260 43.8 41.4 106 39.8 37.5 106
Granite Creek 6770 .2 .0 * 25.5 23.2 110
Grassy Lake 7265 -M 14.3 * -M 42.3 *
Gros Ventre Summit 8750 .4 3.5 11 16.0 16.4 98
Gunsight Pass 9820 12.8 8.7 147 20.2 18.0 112
Lewis Lake Divide 7850 21.9 20.2 108 44.7 41.4 108
Phillips Bench 8200 19.9 16.7 119 38.1 33.3 114
Salt River Summit 7640 .0 .0 * 21.6 20.2 107
Snake River Station 6920 .1 .0 * 29.6 26.8 110
Spring Creek Divide 9000 21.3 18.3 116 29.2 28.4 103
Thumb Divide 7980 4.4 .3 1467* 23.4 23.1 101
Togwotee Pass 9580 24.2 22.7 107 30.7 30.1 102
Two Ocean Plateau 9240 28.5 27.9 102 31.0 33.3 93
Willow Creek 8080 19.1 13.6 140 43.7 41.3 106
Younts Peak 8350 -M 10.7 * -M 19.9 *
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Basin Index (%) 118 106
MADISON-GALLATIN
Black Bear 8170 39.0 32.3 121 51.6 45.0 115
Canyon 7870 3.6 .6 600* 19.9 20.2 99
Madison Plateau 7750 20.5 12.9 159 34.1 32.0 107
West Yellowstone 6700 .1 .0 * 21.5 17.8 121
Whiskey Creek 6800 8.3 3.7 224 26.0 24.6 106
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Basin Index (%) 144 110
YELLOWSTONE
Beartooth Lake 9360 25.0 20.8 120 26.0 24.4 107
Burnt Mtn 5880 1.1 .0 * 23.5 19.7 119
Canyon 7870 3.6 .6 600* 19.9 20.2 99
Cole Creek 7850 20.5 14.7 139 -M 19.9 *
Evening Star 9200 26.8 22.6 119 36.8 33.7 109
Fisher Creek 9100 35.3 31.9 111 43.4 38.8 112
Northeast Entrance 7350 .1 .0 * 18.4 15.9 116
Parker Peak 9400 24.8 19.2 129 30.3 22.8 133
Sylvan Lake 8420 14.0 13.7 102 32.9 28.1 117
Thumb Divide 7980 4.4 .3 1467* 23.4 23.1 101
Two Ocean Plateau 9240 28.5 27.9 102 31.0 33.3 93
White Mill 8700 24.2 21.4 113 26.1 29.3 89
Wolverine 7650 .0 .0 * 17.1 15.8 108
Younts Peak 8350 -M 10.7 * -M 19.9 *
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Basin Index (%) 120 108
WIND RIVER
Burroughs Creek 8750 2.2 -M * 17.9 -M *
Castle Creek 8400 .0 -M * 10.4 -M *
Cold Springs 9630 1.4 .0 * 13.4 14.6 92
Deer Park 9700 13.7 9.1 151 24.6 26.3 94
Hobbs Park 10100 18.5 11.8 157 20.3 19.6 104
Kirwin 9550 7.1 7.0 101 16.0 16.2 99
Little Warm 9370 2.5 1.0 250* 11.2 17.7 63
Owl Creek 8975 1.4 .0 * 11.5 9.9 116
South Pass 9040 10.2 4.1 249 18.2 22.7 80
St. Lawrence Alt 8620 -M .0 * -M 13.7 *
Togwotee Pass 9580 24.2 22.7 107 30.7 30.1 102
Townsend Creek 8700 7.4 .0 * 18.7 17.4 107
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Basin Index (%) 155* 94
BIGHORN BASIN
Bald Mtn. 9380 20.2 18.0 112 19.2 22.4 86
Bear Trap Meadow 8200 .6 .0 * 10.7 12.9 83
Bone Springs Div 9350 15.9 13.4 119 17.6 21.3 83
Grave Springs 8550 3.5 .3 1167* 13.0 15.2 86
Kirwin 9550 7.1 7.0 101 16.0 16.2 99
Marquette 8760 7.8 -M * 17.9 -M *
Middle Powder 7760 1.2 2.6 46 14.6 16.5 88
Owl Creek 8975 1.4 .0 * 11.5 9.9 116
Powder River Pass 9480 3.1 3.2 97 -M 17.7 *
Shell Creek 9580 15.9 14.4 110 16.2 18.9 86
Timber Creek 7950 2.5 .0 * 13.6 12.5 109
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Basin Index (%) 121 91
SHOSHONE RIVER
Blackwater 9780 28.0 23.6 119 32.5 26.3 124
Evening Star 9200 26.8 22.6 119 36.8 33.7 109
Marquette 8760 7.8 -M * 17.9 -M *
Sylvan Lake 8420 14.0 13.7 102 32.9 28.1 117
Sylvan Road 7120 .1 .0 * 19.2 20.6 93
Younts Peak 8350 -M 10.7 * -M 19.9 *
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Basin Index (%) 115 112
POWDER RIVER
Bear Trap Meadow 8200 .6 .0 * 10.7 12.9 83
Cloud Peak Reservoir 9860 13.7 13.2 104 17.8 20.0 89
Grave Springs 8550 3.5 .3 1167* 13.0 15.2 86
Hansen Sawmill 8360 1.8 .0 * 13.5 13.3 102
Middle Powder 7760 1.2 2.6 46 14.6 16.5 88
Powder River Pass 9480 3.1 3.2 97 -M 17.7 *
Soldier Park 8720 1.5 -M * 11.9 -M *
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Basin Index (%) 124* 89
TONGUE RIVER
Big Goose 7990 -M 2.1 * -M 17.5 *
Bone Springs Div 9350 15.9 13.4 119 17.6 21.3 83
Burgess Junction 7880 7.4 6.2 119 14.6 17.3 84
Dome Lake 8880 8.8 4.0 220 17.4 19.4 90
Little Goose 8870 11.4 -M * 13.7 -M *
Sucker Creek 8880 -M 7.0 * -M 20.6 *
Tie Creek 6870 -M .0 * 18.8 17.6 107
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Basin Index (%) 136* 90
BELLE FOURCHE
Blind Park 6890 .6 .0 * 11.1 17.2 65
Cole Canyon 5910 2.4 .0 * 20.4 15.1 135
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Basin Index (%) * 98
CHEYENNE RIVER BASIN
Blind Park 6890 .6 .0 * 11.1 17.2 65
North Rapid Creek 6130 .6 .0 * 11.7 14.9 79
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Basin Index (%) * 71
UPPER N. PLATTE
Arapaho Ridge 10960 25.5 15.5 165 33.1 28.7 115
Blackhall Mtn 9820 29.0 -M * 40.0 -M *
Columbine 9160 9.1 .1 9100* 34.9 30.8 113
Divide Peak 8880 6.0 3.0 200 28.8 26.7 108
Joe Wright 10120 22.1 19.7 112 37.0 33.2 111
Laprele Creek 8375 .8 .0 * 18.7 17.1 109
Med Bow 10500 40.6 -M * 42.8 -M *
Never Summer 10280 24.9 18.8 132 24.9 -M *
North French Creek 10130 29.2 27.5 106 36.7 34.1 108
Old Battle 10000 39.5 31.3 126 43.9 42.4 104
Rawah 9020 .9 .1 900* 21.5 19.1 113
Sage Creek Basin 7850 -M .0 * 19.8 17.5 113
Sand Lake 10050 30.9 26.4 117 30.9 32.2 96
South Brush Creek 8440 .0 .0 * 15.9 20.4 78
Tower 10500 57.2 46.4 123 55.7 48.2 116
Webber Springs 9250 17.4 8.8 198 37.8 32.3 117
Whiskey Park 8950 -M 18.8 * -M 34.0 *
Willow Creek Pass 9540 14.3 7.5 191 22.0 17.6 125
Zirkel 9340 17.6 5.0 352 44.8 33.5 134
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Basin Index (%) 141 111
SWEETWATER
Deer Park 9700 13.7 9.1 151 24.6 26.3 94
Larsen Creek 9000 .0 2.7 0 17.5 -M *
South Pass 9040 10.2 4.1 249 18.2 22.7 80
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Basin Index (%) 150 87
LOWER N. PLATTE
Casper Mtn. 7900 8.1 2.2 368 19.9 20.7 96
Laprele Creek 8375 .8 .0 * 18.7 17.1 109
Reno Hill 8400 11.3 .8 1412* 24.8 21.6 115
Windy Peak 7900 .8 .0 * 14.2 15.1 94
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Basin Index (%) 700* 104
LARAMIE RIVER
Brooklyn Lake 10240 18.8 13.8 136 32.4 27.5 118
Cinnabar Park 9574 14.3 9.5 151 29.3 29.8 98
Crow Creek 8330 -M .0 * 14.9 15.5 96
Deadman Hill 10220 17.8 14.6 122 24.8 23.3 106
Rawah 9020 .9 .1 900* 21.5 19.1 113
Roach 9700 10.7 9.2 116 27.9 24.9 112
Windy Peak 7900 .8 .0 * 14.2 15.1 94
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Basin Index (%) 134 106
S. PLATTE
Black Mountain 8920 .8 -M * 18.6 -M *
Crow Creek 8330 -M .0 * 14.9 15.5 96
Deadman Hill 10220 17.8 14.6 122 24.8 23.3 106
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Basin Index (%) 122* 102
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * 21.0 18.7 112
Divide Peak 8880 6.0 3.0 200 28.8 26.7 108
Elk River 8700 1.4 .0 * 24.3 24.8 98
Little Snake River 8915 18.1 9.9 183 44.5 35.4 126
Old Battle 10000 39.5 31.3 126 43.9 42.4 104
Sage Creek Basin 7850 -M .0 * 19.8 17.5 113
Sandstone RS 8150 -M .0 * 22.4 22.7 99
Whiskey Park 8950 -M 18.8 * -M 34.0 *
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Basin Index (%) 147* 109
UPPER GREEN RIVER
Big Sandy Opening 9080 7.6 .4 1900* 18.9 17.1 111
Blind Bull Sum 8650 23.1 18.3 126 23.8 23.5 101
East Rim Divide 7930 -M .0 * 16.0 14.4 111
Elkhart Park G.S. 9400 10.3 4.2 245 18.7 17.1 109
Gros Ventre Summit 8750 .4 3.5 11 16.0 16.4 98
Gunsight Pass 9820 12.8 8.7 147 20.2 18.0 112
Indian Creek 9425 19.7 16.3 121 24.7 27.3 90
Kendall R.S. 7740 .1 .0 * 15.3 17.0 90
Loomis Park 8240 4.9 .5 980* 21.7 20.8 104
New Fork Lake 8340 .3 .0 * 14.3 13.8 104
Pocket Creek 9360 10.3 -M * 18.4 -M *
Snider Basin 8060 .0 .0 * 17.2 17.0 101
Spring Creek Divide 9000 21.3 18.3 116 29.2 28.4 103
Triple Peak 8500 13.0 5.5 236 32.1 30.6 105
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Basin Index (%) 150 103
LOWER GREEN RIVER
Blacks Fork Jct 8869 .1 -M * 17.0 -M *
Buck Pasture 9632 8.9 -M * 26.4 -M *
EF Blacks Fork GS 9360 .7 -M * 17.2 -M *
Hams Fork 7840 .0 .0 * 17.1 14.7 116
Hewinta 9500 .0 .0 * 19.7 17.9 110
Hickerson Park 9122 1.0 .0 * 16.7 13.7 122
Hole-in-Rock 9168 .9 .0 * 16.1 13.3 121
Indian Creek 9425 19.7 16.3 121 24.7 27.3 90
Kelley R.S. 8180 4.6 .7 657* 22.0 22.1 100
Spirit Lk 10235 13.2 -M * 23.3 -M *
Steel Creek Park 10158 15.9 13.3 120 25.0 21.3 117
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Basin Index (%) 139* 108
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 19.5 -M *
Bug Lake 7987 9.8 1.2 817* 29.9 23.8 126
Burts Miller Ranch 8000 .0 -M * 10.8 -M *
Chalk Creek #1 9171 18.6 12.8 145 36.2 31.1 116
Hayden Fork 9130 .1 .0 * 29.1 26.1 111
Kelley R.S. 8180 4.6 .7 657* 22.0 22.1 100
Lily Lake 9133 .6 .0 * 21.2 21.6 98
Monte Cristo 8932 27.8 11.9 234 40.1 32.0 125
Salt River Summit 7640 .0 .0 * 21.6 20.2 107
Spring Creek Divide 9000 21.3 18.3 116 29.2 28.4 103
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Basin Index (%) 184* 112
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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.