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 WEDNESDAY: MAY 22 , 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 24.7 103
Black Bear 8170 39.0 32.7 119 51.6 44.9 115
Blind Bull Sum 8650 23.5 18.8 125 23.6 23.4 101
Cottonwood Creek 7670 9.8 4.4 223 32.9 30.3 109
East Rim Divide 7930 .0 .0 * 16.0 14.3 112
Grand Targhee 9260 43.8 41.6 105 39.9 37.1 108
Granite Creek 6770 .5 .0 * 25.4 23.1 110
Grassy Lake 7265 -M 15.4 * -M 42.1 *
Gros Ventre Summit 8750 .6 4.2 14 16.1 16.3 99
Gunsight Pass 9820 12.7 9.3 137 20.2 17.8 113
Lewis Lake Divide 7850 22.2 21.0 106 44.6 41.2 108
Phillips Bench 8200 19.9 17.6 113 38.0 33.1 115
Salt River Summit 7640 .3 .0 * 21.5 20.1 107
Snake River Station 6920 .0 .0 * 29.5 26.7 110
Spring Creek Divide 9000 21.3 19.0 112 29.2 28.3 103
Thumb Divide 7980 4.6 .3 1533* 23.4 22.9 102
Togwotee Pass 9580 23.9 22.8 105 30.5 29.9 102
Two Ocean Plateau 9240 28.4 28.0 101 30.9 33.1 93
Willow Creek 8080 19.1 14.7 130 43.6 41.2 106
Younts Peak 8350 -M 11.1 * -M 19.8 *
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Basin Index (%) 115 107
MADISON-GALLATIN
Black Bear 8170 39.0 32.7 119 51.6 44.9 115
Canyon 7870 3.9 1.1 355* 19.9 20.0 100
Madison Plateau 7750 20.4 13.3 153 34.0 31.8 107
West Yellowstone 6700 .1 .0 * 21.3 17.7 120
Whiskey Creek 6800 8.5 4.3 198 25.8 24.5 105
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Basin Index (%) 140 110
YELLOWSTONE
Beartooth Lake 9360 24.1 21.1 114 25.5 24.3 105
Burnt Mtn 5880 .6 .0 * 22.9 19.3 119
Canyon 7870 3.9 1.1 355* 19.9 20.0 100
Cole Creek 7850 20.0 15.2 132 -M 19.7 *
Evening Star 9200 26.4 23.0 115 36.4 33.6 108
Fisher Creek 9100 34.9 32.2 108 43.1 38.6 112
Northeast Entrance 7350 .1 .0 * 18.4 15.7 117
Parker Peak 9400 24.2 19.4 125 30.0 22.6 133
Sylvan Lake 8420 14.0 14.2 99 32.9 27.9 118
Thumb Divide 7980 4.6 .3 1533* 23.4 22.9 102
Two Ocean Plateau 9240 28.4 28.0 101 30.9 33.1 93
White Mill 8700 24.0 21.6 111 26.0 29.2 89
Wolverine 7650 .0 .0 * 16.9 15.7 108
Younts Peak 8350 -M 11.1 * -M 19.8 *
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Basin Index (%) 117 108
WIND RIVER
Burroughs Creek 8750 2.1 -M * 17.7 -M *
Castle Creek 8400 .0 -M * 10.4 -M *
Cold Springs 9630 .7 .0 * 12.7 14.5 88
Deer Park 9700 13.4 9.5 141 24.4 26.1 93
Hobbs Park 10100 17.5 12.2 143 19.2 19.5 98
Kirwin 9550 6.3 7.5 84 15.3 16.1 95
Little Warm 9370 2.4 1.5 160 11.3 17.5 65
Owl Creek 8975 1.2 .0 * 11.4 9.8 116
South Pass 9040 9.8 4.9 200 17.8 22.6 79
St. Lawrence Alt 8620 -M .0 * -M 13.6 *
Togwotee Pass 9580 23.9 22.8 105 30.5 29.9 102
Townsend Creek 8700 6.8 .0 * 18.1 17.2 105
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Basin Index (%) 140 93
BIGHORN BASIN
Bald Mtn. 9380 19.0 18.4 103 18.1 22.2 82
Bear Trap Meadow 8200 .4 .0 * 10.3 12.8 80
Bone Springs Div 9350 14.1 13.7 103 16.6 21.1 79
Grave Springs 8550 3.2 .9 356* 12.8 15.1 85
Kirwin 9550 6.3 7.5 84 15.3 16.1 95
Marquette 8760 6.0 -M * 16.4 -M *
Middle Powder 7760 .9 3.5 26 14.2 16.4 87
Owl Creek 8975 1.2 .0 * 11.4 9.8 116
Powder River Pass 9480 2.9 4.0 72 -M 17.5 *
Shell Creek 9580 14.8 14.6 101 15.0 18.7 80
Timber Creek 7950 1.4 .0 * 12.5 12.4 101
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Basin Index (%) 103 87
SHOSHONE RIVER
Blackwater 9780 27.7 23.8 116 31.8 26.2 121
Evening Star 9200 26.4 23.0 115 36.4 33.6 108
Marquette 8760 6.0 -M * 16.4 -M *
Sylvan Lake 8420 14.0 14.2 99 32.9 27.9 118
Sylvan Road 7120 .0 .0 * 19.2 20.5 94
Younts Peak 8350 -M 11.1 * -M 19.8 *
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Basin Index (%) 112 111
POWDER RIVER
Bear Trap Meadow 8200 .4 .0 * 10.3 12.8 80
Cloud Peak Reservoir 9860 12.3 13.8 89 16.4 19.8 83
Grave Springs 8550 3.2 .9 356* 12.8 15.1 85
Hansen Sawmill 8360 1.1 .0 * 12.9 13.1 98
Middle Powder 7760 .9 3.5 26 14.2 16.4 87
Powder River Pass 9480 2.9 4.0 72 -M 17.5 *
Soldier Park 8720 1.0 -M * 11.4 -M *
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Basin Index (%) 94* 86
TONGUE RIVER
Big Goose 7990 6.7 2.9 231 16.7 17.3 97
Bone Springs Div 9350 14.1 13.7 103 16.6 21.1 79
Burgess Junction 7880 5.9 6.9 86 13.0 17.2 76
Dome Lake 8880 6.8 4.7 145 15.4 19.2 80
Little Goose 8870 9.4 -M * 12.6 -M *
Sucker Creek 8880 9.6 7.6 126 16.4 20.5 80
Tie Creek 6870 1.2 .0 * 17.7 17.4 102
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Basin Index (%) 124 85
BELLE FOURCHE
Blind Park 6890 .4 .0 * 10.9 17.0 64
Cole Canyon 5910 1.3 .0 * 19.6 15.0 131
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Basin Index (%) * 95
CHEYENNE RIVER BASIN
Blind Park 6890 .4 .0 * 10.9 17.0 64
North Rapid Creek 6130 .2 .0 * -M 14.7 *
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Basin Index (%) * 64
UPPER N. PLATTE
Arapaho Ridge 10960 25.1 16.5 152 32.8 28.5 115
Blackhall Mtn 9820 28.9 -M * 39.8 -M *
Columbine 9160 9.0 .6 1500* 34.6 30.7 113
Divide Peak 8880 6.0 3.9 154 28.7 26.6 108
Joe Wright 10120 21.9 20.2 108 36.8 33.0 112
Laprele Creek 8375 .5 .0 * 18.4 17.0 108
Med Bow 10500 40.6 -M * 42.8 -M *
Never Summer 10280 24.7 19.2 129 24.7 -M *
North French Creek 10130 29.2 28.2 104 36.5 33.9 108
Old Battle 10000 39.4 31.8 124 43.8 42.3 104
Rawah 9020 .9 .3 300* 21.4 18.9 113
Sage Creek Basin 7850 -M .0 * 19.8 17.5 113
Sand Lake 10050 30.7 27.0 114 30.6 32.1 95
South Brush Creek 8440 .0 .0 * 15.7 20.3 77
Tower 10500 57.0 46.9 122 55.2 48.1 115
Webber Springs 9250 17.3 9.9 175 37.7 32.2 117
Whiskey Park 8950 24.5 20.0 122 39.0 34.0 115
Willow Creek Pass 9540 14.3 8.2 174 21.9 17.5 125
Zirkel 9340 17.5 6.5 269 44.5 33.4 133
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Basin Index (%) 133 111
SWEETWATER
Deer Park 9700 13.4 9.5 141 24.4 26.1 93
Larsen Creek 9000 .0 3.0 0 17.4 -M *
South Pass 9040 9.8 4.9 200 17.8 22.6 79
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Basin Index (%) 133 87
LOWER N. PLATTE
Casper Mtn. 7900 6.2 2.9 214 18.2 20.6 88
Laprele Creek 8375 .5 .0 * 18.4 17.0 108
Reno Hill 8400 10.3 1.7 606 23.6 21.6 109
Windy Peak 7900 .6 .0 * 14.2 15.1 94
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Basin Index (%) 383 100
LARAMIE RIVER
Brooklyn Lake 10240 18.8 14.6 129 32.3 27.4 118
Cinnabar Park 9574 14.3 10.5 136 29.2 29.6 99
Crow Creek 8330 -M .0 * 14.8 15.2 97
Deadman Hill 10220 17.7 15.3 116 24.7 23.2 106
Rawah 9020 .9 .3 300* 21.4 18.9 113
Roach 9700 10.5 10.0 105 27.7 24.8 112
Windy Peak 7900 .6 .0 * 14.2 15.1 94
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Basin Index (%) 124 107
S. PLATTE
Black Mountain 8920 .7 -M * 18.5 -M *
Crow Creek 8330 -M .0 * 14.8 15.2 97
Deadman Hill 10220 17.7 15.3 116 24.7 23.2 106
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Basin Index (%) 116* 103
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * 21.0 18.7 112
Divide Peak 8880 6.0 3.9 154 28.7 26.6 108
Elk River 8700 1.6 .0 * 24.0 24.7 97
Little Snake River 8915 18.1 11.0 165 44.5 35.2 126
Old Battle 10000 39.4 31.8 124 43.8 42.3 104
Sage Creek Basin 7850 -M .0 * 19.8 17.5 113
Sandstone RS 8150 -M .0 * 22.4 22.6 99
Whiskey Park 8950 24.5 20.0 122 39.0 34.0 115
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Basin Index (%) 134 110
UPPER GREEN RIVER
Big Sandy Opening 9080 7.7 1.1 700* 19.0 17.0 112
Blind Bull Sum 8650 23.5 18.8 125 23.6 23.4 101
East Rim Divide 7930 .0 .0 * 16.0 14.3 112
Elkhart Park G.S. 9400 10.2 4.7 217 18.6 17.0 109
Gros Ventre Summit 8750 .6 4.2 14 16.1 16.3 99
Gunsight Pass 9820 12.7 9.3 137 20.2 17.8 113
Indian Creek 9425 19.5 17.0 115 24.4 27.2 90
Kendall R.S. 7740 .1 .0 * 15.3 16.9 91
Loomis Park 8240 4.8 1.0 480* 21.6 20.7 104
New Fork Lake 8340 .2 .0 * 14.2 13.7 104
Pocket Creek 9360 10.3 -M * 18.4 -M *
Snider Basin 8060 .0 .0 * 17.0 16.9 101
Spring Creek Divide 9000 21.3 19.0 112 29.2 28.3 103
Triple Peak 8500 13.0 6.4 203 31.9 30.4 105
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Basin Index (%) 139 103
LOWER GREEN RIVER
Blacks Fork Jct 8869 .3 -M * 16.9 -M *
Buck Pasture 9632 8.3 -M * 25.8 -M *
EF Blacks Fork GS 9360 .5 -M * 16.9 -M *
Hams Fork 7840 .3 .0 * 17.0 14.6 116
Hewinta 9500 .0 .0 * 19.5 17.9 109
Hickerson Park 9122 .5 .0 * 16.0 13.6 118
Hole-in-Rock 9168 .9 .0 * 15.8 13.2 120
Indian Creek 9425 19.5 17.0 115 24.4 27.2 90
Kelley R.S. 8180 4.5 1.2 375* 21.8 22.0 99
Spirit Lk 10235 12.6 -M * 22.7 -M *
Steel Creek Park 10158 15.6 13.7 114 24.6 21.2 116
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Basin Index (%) 129* 107
UPPER BEAR RIVER
Bear River RS 8777 .3 -M * 19.4 -M *
Bug Lake 7987 9.5 2.5 380 29.6 23.7 125
Burts Miller Ranch 8000 .2 -M * 10.8 -M *
Chalk Creek #1 9171 17.9 13.7 131 35.6 31.1 114
Hayden Fork 9130 .1 .0 * 29.0 26.0 112
Kelley R.S. 8180 4.5 1.2 375* 21.8 22.0 99
Lily Lake 9133 .4 .0 * 20.9 21.5 97
Monte Cristo 8932 27.2 12.9 211 39.6 31.8 125
Salt River Summit 7640 .3 .0 * 21.5 20.1 107
Spring Creek Divide 9000 21.3 19.0 112 29.2 28.3 103
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Basin Index (%) 165* 111
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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.