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 8 , 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 10.7 5.5 195 24.6 23.5 105
Black Bear 8170 43.3 36.9 117 49.7 42.8 116
Blind Bull Sum 8650 23.9 22.6 106 21.6 22.0 98
Cottonwood Creek 7670 16.3 13.3 123 29.9 28.6 105
East Rim Divide 7930 .0 6.6 0 14.1 13.4 105
Grand Targhee 9260 49.1 46.4 106 38.4 35.9 107
Granite Creek 6770 10.0 6.3 159 23.6 21.9 108
Grassy Lake 7265 -M 26.7 * -M 40.3 *
Gros Ventre Summit 8750 6.0 10.0 60 14.8 15.2 97
Gunsight Pass 9820 15.5 11.8 131 19.2 16.7 115
Lewis Lake Divide 7850 32.1 29.5 109 43.5 39.5 110
Phillips Bench 8200 26.4 23.4 113 36.2 31.6 115
Salt River Summit 7640 6.4 5.7 112 18.9 18.9 100
Snake River Station 6920 7.2 3.5 206 28.6 25.4 113
Spring Creek Divide 9000 23.4 24.0 98 26.8 26.9 100
Thumb Divide 7980 13.3 9.4 141 22.3 21.6 103
Togwotee Pass 9580 26.1 25.2 104 29.2 28.3 103
Two Ocean Plateau 9240 33.7 29.7 113 30.0 30.9 97
Willow Creek 8080 26.7 21.5 124 40.9 38.9 105
Younts Peak 8350 -M 15.6 * -M 18.3 *
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Basin Index (%) 112 106
MADISON-GALLATIN
Black Bear 8170 43.3 36.9 117 49.7 42.8 116
Canyon 7870 11.1 8.0 139 18.9 18.6 102
Madison Plateau 7750 27.3 20.6 133 32.3 29.8 108
West Yellowstone 6700 .2 .0 * 19.8 16.5 120
Whiskey Creek 6800 14.7 11.5 128 24.4 22.9 107
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Basin Index (%) 125 111
YELLOWSTONE
Beartooth Lake 9360 25.5 23.0 111 23.9 22.8 105
Burnt Mtn 5880 2.7 .0 * 19.1 16.9 113
Canyon 7870 11.1 8.0 139 18.9 18.6 102
Cole Creek 7850 20.2 17.0 119 -M 17.5 *
Evening Star 9200 29.1 25.2 115 35.0 31.5 111
Fisher Creek 9100 36.4 33.8 108 41.3 36.3 114
Northeast Entrance 7350 .1 1.0 10 17.1 14.4 119
Parker Peak 9400 28.8 21.7 133 28.9 20.9 138
Sylvan Lake 8420 19.7 18.2 108 31.7 26.0 122
Thumb Divide 7980 13.3 9.4 141 22.3 21.6 103
Two Ocean Plateau 9240 33.7 29.7 113 30.0 30.9 97
White Mill 8700 27.8 24.5 113 24.5 27.2 90
Wolverine 7650 1.8 .4 450* 15.8 14.3 110
Younts Peak 8350 -M 15.6 * -M 18.3 *
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Basin Index (%) 118 110
WIND RIVER
Burroughs Creek 8750 8.0 -M * 16.7 -M *
Castle Creek 8400 .0 -M * 8.7 -M *
Cold Springs 9630 4.3 1.6 269 11.6 13.2 88
Deer Park 9700 15.2 14.6 104 22.3 24.3 92
Hobbs Park 10100 17.8 15.9 112 16.5 17.6 94
Kirwin 9550 10.0 10.8 93 13.8 14.6 95
Little Warm 9370 8.2 6.9 119 11.2 16.1 70
Owl Creek 8975 .3 .5 60* 9.5 8.4 113
South Pass 9040 12.5 12.6 99 15.7 21.1 74
St. Lawrence Alt 8620 -M 1.4 * -M 12.2 *
Togwotee Pass 9580 26.1 25.2 104 29.2 28.3 103
Townsend Creek 8700 9.2 4.8 192 15.3 15.6 98
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Basin Index (%) 112 91
BIGHORN BASIN
Bald Mtn. 9380 19.6 20.4 96 15.9 20.7 77
Bear Trap Meadow 8200 .1 .2 50* 8.6 11.4 75
Bone Springs Div 9350 16.1 16.4 98 14.9 19.3 77
Grave Springs 8550 6.4 8.2 78 11.1 13.7 81
Kirwin 9550 10.0 10.8 93 13.8 14.6 95
Marquette 8760 7.1 -M * 12.0 -M *
Middle Powder 7760 5.3 11.1 48 10.9 15.0 73
Owl Creek 8975 .3 .5 60* 9.5 8.4 113
Powder River Pass 9480 7.1 9.0 79 -M 16.0 *
Shell Creek 9580 15.7 16.6 95 13.0 17.3 75
Timber Creek 7950 .6 1.8 33 9.6 10.7 90
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Basin Index (%) 85 82
SHOSHONE RIVER
Blackwater 9780 29.4 25.2 117 30.1 24.3 124
Evening Star 9200 29.1 25.2 115 35.0 31.5 111
Marquette 8760 7.1 -M * 12.0 -M *
Sylvan Lake 8420 19.7 18.2 108 31.7 26.0 122
Sylvan Road 7120 .1 2.4 4 18.9 19.2 98
Younts Peak 8350 -M 15.6 * -M 18.3 *
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Basin Index (%) 110 115
POWDER RIVER
Bear Trap Meadow 8200 .1 .2 50* 8.6 11.4 75
Cloud Peak Reservoir 9860 13.5 16.6 81 13.6 17.8 76
Grave Springs 8550 6.4 8.2 78 11.1 13.7 81
Hansen Sawmill 8360 2.8 1.5 187 10.3 11.6 89
Middle Powder 7760 5.3 11.1 48 10.9 15.0 73
Powder River Pass 9480 7.1 9.0 79 -M 16.0 *
Soldier Park 8720 1.0 -M * 9.3 -M *
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Basin Index (%) 76 78
TONGUE RIVER
Big Goose 7990 8.4 10.3 82 13.7 15.4 89
Bone Springs Div 9350 16.1 16.4 98 14.9 19.3 77
Burgess Junction 7880 8.6 11.4 75 11.1 15.7 71
Dome Lake 8880 8.2 11.2 73 12.4 17.5 71
Little Goose 8870 10.6 -M * 10.5 -M *
Sucker Creek 8880 11.2 12.3 91 13.3 18.6 72
Tie Creek 6870 1.7 1.8 94 14.5 15.5 94
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Basin Index (%) 85 78
BELLE FOURCHE
Blind Park 6890 .0 .0 * 9.6 15.1 64
Cole Canyon 5910 .0 .0 * 15.1 13.2 114
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Basin Index (%) * 87
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 9.6 15.1 64
North Rapid Creek 6130 .0 .0 * -M 13.0 *
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Basin Index (%) * 64
UPPER N. PLATTE
Arapaho Ridge 10960 24.8 22.3 111 29.9 27.0 111
Blackhall Mtn 9820 33.0 -M * 38.3 -M *
Columbine 9160 14.4 14.4 100 32.4 29.3 111
Divide Peak 8880 12.7 15.6 81 27.3 25.2 108
Joe Wright 10120 21.7 22.9 95 34.3 30.9 111
Laprele Creek 8375 3.8 4.0 95 16.8 15.8 106
Med Bow 10500 41.2 -M * 40.6 -M *
Never Summer 10280 24.8 22.1 112 22.6 -M *
North French Creek 10130 31.6 32.8 96 34.9 31.9 109
Old Battle 10000 40.0 36.2 110 42.2 40.4 104
Rawah 9020 5.0 3.4 147 20.3 17.9 113
Sage Creek Basin 7850 4.6 .0 * 19.2 16.7 115
Sand Lake 10050 32.0 31.8 101 29.2 30.1 97
South Brush Creek 8440 .0 6.2 0 14.9 18.7 80
Tower 10500 54.9 51.4 107 52.3 46.1 113
Webber Springs 9250 21.5 20.2 106 35.4 30.8 115
Whiskey Park 8950 27.4 27.0 101 37.5 32.6 115
Willow Creek Pass 9540 17.1 14.0 122 20.7 16.3 127
Zirkel 9340 24.0 20.1 119 42.5 32.0 133
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Basin Index (%) 105 111
SWEETWATER
Deer Park 9700 15.2 14.6 104 22.3 24.3 92
Larsen Creek 9000 .3 7.1 4 16.8 -M *
South Pass 9040 12.5 12.6 99 15.7 21.1 74
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Basin Index (%) 82 84
LOWER N. PLATTE
Casper Mtn. 7900 8.7 11.9 73 15.0 19.0 79
Laprele Creek 8375 3.8 4.0 95 16.8 15.8 106
Reno Hill 8400 13.2 11.4 116 20.8 19.9 105
Windy Peak 7900 1.7 1.6 106 13.8 13.6 101
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Basin Index (%) 95 97
LARAMIE RIVER
Brooklyn Lake 10240 22.8 21.9 104 30.4 25.7 118
Cinnabar Park 9574 17.7 18.0 98 27.5 28.0 98
Crow Creek 8330 .0 .0 * 13.2 14.1 94
Deadman Hill 10220 21.5 18.7 115 23.6 21.5 110
Rawah 9020 5.0 3.4 147 20.3 17.9 113
Roach 9700 14.1 16.4 86 25.9 23.1 112
Windy Peak 7900 1.7 1.6 106 13.8 13.6 101
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Basin Index (%) 104 108
S. PLATTE
Black Mountain 8920 5.8 -M * 17.0 -M *
Crow Creek 8330 .0 .0 * 13.2 14.1 94
Deadman Hill 10220 21.5 18.7 115 23.6 21.5 110
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Basin Index (%) 115* 103
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * 20.0 17.7 113
Divide Peak 8880 12.7 15.6 81 27.3 25.2 108
Elk River 8700 10.1 9.3 109 23.2 23.5 99
Little Snake River 8915 24.3 20.9 116 43.0 34.0 126
Old Battle 10000 40.0 36.2 110 42.2 40.4 104
Sage Creek Basin 7850 4.6 .0 * 19.2 16.7 115
Sandstone RS 8150 4.8 2.7 178 21.9 21.5 102
Whiskey Park 8950 27.4 27.0 101 37.5 32.6 115
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Basin Index (%) 111 111
UPPER GREEN RIVER
Big Sandy Opening 9080 12.7 8.7 146 18.0 15.9 113
Blind Bull Sum 8650 23.9 22.6 106 21.6 22.0 98
East Rim Divide 7930 .0 6.6 0 14.1 13.4 105
Elkhart Park G.S. 9400 13.8 9.8 141 17.0 15.7 108
Gros Ventre Summit 8750 6.0 10.0 60 14.8 15.2 97
Gunsight Pass 9820 15.5 11.8 131 19.2 16.7 115
Indian Creek 9425 20.0 21.1 95 20.8 25.8 81
Kendall R.S. 7740 2.6 .2 1300* 13.9 16.0 87
Loomis Park 8240 10.2 8.0 128 19.7 19.6 101
New Fork Lake 8340 4.2 3.5 120 12.2 12.7 96
Pocket Creek 9360 14.4 -M * 17.9 -M *
Snider Basin 8060 .0 7.6 0 15.0 16.1 93
Spring Creek Divide 9000 23.4 24.0 98 26.8 26.9 100
Triple Peak 8500 18.1 15.3 118 29.3 28.9 101
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Basin Index (%) 101 99
LOWER GREEN RIVER
Blacks Fork Jct 8869 2.0 -M * 16.0 -M *
Buck Pasture 9632 13.4 -M * 24.2 -M *
EF Blacks Fork GS 9360 5.7 -M * 15.2 -M *
Hams Fork 7840 .0 .3 0* 14.1 13.6 104
Hewinta 9500 5.0 2.9 172 18.3 16.9 108
Hickerson Park 9122 1.8 1.2 150 14.4 12.6 114
Hole-in-Rock 9168 .4 .7 57* 13.8 12.1 114
Indian Creek 9425 20.0 21.1 95 20.8 25.8 81
Kelley R.S. 8180 8.5 8.9 96 18.6 20.8 89
Spirit Lk 10235 13.7 -M * 20.2 -M *
Steel Creek Park 10158 17.3 17.7 98 23.0 19.9 116
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Basin Index (%) 100* 101
UPPER BEAR RIVER
Bear River RS 8777 .1 -M * 18.1 -M *
Bug Lake 7987 16.8 12.6 133 27.5 22.4 123
Burts Miller Ranch 8000 -M -M * 10.5 -M *
Chalk Creek #1 9171 22.1 22.2 100 33.8 29.4 115
Hayden Fork 9130 7.8 6.6 118 27.4 24.6 111
Kelley R.S. 8180 8.5 8.9 96 18.6 20.8 89
Lily Lake 9133 7.9 7.0 113 19.7 20.3 97
Monte Cristo 8932 30.2 22.7 133 36.4 30.3 120
Salt River Summit 7640 6.4 5.7 112 18.9 18.9 100
Spring Creek Divide 9000 23.4 24.0 98 26.8 26.9 100
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Basin Index (%) 112 108
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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.