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 16 , 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 3.4 .0 * 24.6 24.1 102
Black Bear 8170 39.9 35.8 111 49.9 44.1 113
Blind Bull Sum 8650 25.8 21.8 118 22.1 22.9 97
Cottonwood Creek 7670 10.3 9.6 107 30.6 29.5 104
East Rim Divide 7930 .0 3.3 0 14.6 13.9 105
Grand Targhee 9260 44.4 44.6 100 38.5 36.7 105
Granite Creek 6770 -M .4 * -M 22.6 *
Grassy Lake 7265 -M 21.3 * -M 41.3 *
Gros Ventre Summit 8750 1.8 8.2 22 14.9 15.8 94
Gunsight Pass 9820 12.8 12.0 107 19.2 17.5 110
Lewis Lake Divide 7850 24.9 25.3 98 43.7 40.5 108
Phillips Bench 8200 20.9 21.5 97 36.4 32.5 112
Salt River Summit 7640 .0 1.0 0* 19.3 19.6 98
Snake River Station 6920 .0 .0 * 28.6 26.1 110
Spring Creek Divide 9000 20.6 22.3 92 27.6 27.8 99
Thumb Divide 7980 7.4 4.3 172 22.4 22.4 100
Togwotee Pass 9580 23.2 24.1 96 29.3 29.2 100
Two Ocean Plateau 9240 28.9 29.1 99 30.0 32.3 93
Willow Creek 8080 19.1 19.3 99 41.2 40.3 102
Younts Peak 8350 -M 13.3 * -M 19.2 *
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Basin Index (%) 100 104
MADISON-GALLATIN
Black Bear 8170 39.9 35.8 111 49.9 44.1 113
Canyon 7870 6.3 4.8 131 19.0 19.5 97
Madison Plateau 7750 21.8 16.5 132 32.5 30.9 105
West Yellowstone 6700 .0 .0 * 20.1 17.2 117
Whiskey Creek 6800 10.8 8.1 133 24.8 23.8 104
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Basin Index (%) 121 108
YELLOWSTONE
Beartooth Lake 9360 24.0 22.5 107 24.6 23.8 103
Burnt Mtn 5880 .0 .0 * 20.3 18.8 108
Canyon 7870 6.3 4.8 131 19.0 19.5 97
Cole Creek 7850 18.9 16.9 112 -M 19.0 *
Evening Star 9200 26.4 25.1 105 35.3 32.7 108
Fisher Creek 9100 34.4 33.9 101 41.9 37.7 111
Northeast Entrance 7350 .1 .0 * 17.5 15.1 116
Parker Peak 9400 25.0 21.3 117 29.2 22.0 133
Sylvan Lake 8420 14.6 16.7 87 31.8 27.1 117
Thumb Divide 7980 7.4 4.3 172 22.4 22.4 100
Two Ocean Plateau 9240 28.9 29.1 99 30.0 32.3 93
White Mill 8700 24.5 24.1 102 24.9 28.4 88
Wolverine 7650 .0 .0 * 16.0 15.2 105
Younts Peak 8350 -M 13.3 * -M 19.2 *
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Basin Index (%) 106 106
WIND RIVER
Burroughs Creek 8750 3.3 -M * 17.0 -M *
Castle Creek 8400 .0 -M * 9.2 -M *
Cold Springs 9630 .0 .0 * 12.4 14.1 88
Deer Park 9700 13.2 13.0 102 23.5 25.6 92
Hobbs Park 10100 17.0 14.6 116 18.1 18.7 97
Kirwin 9550 6.9 10.1 68 14.6 15.5 94
Little Warm 9370 3.8 5.6 68 11.0 17.0 65
Owl Creek 8975 .0 .0 * 9.9 9.3 106
South Pass 9040 10.2 9.7 105 17.1 22.2 77
St. Lawrence Alt 8620 -M .0 * -M 13.2 *
Togwotee Pass 9580 23.2 24.1 96 29.3 29.2 100
Townsend Creek 8700 7.0 .6 1167* 17.1 16.7 102
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Basin Index (%) 105 91
BIGHORN BASIN
Bald Mtn. 9380 19.7 20.5 96 17.6 21.7 81
Bear Trap Meadow 8200 .0 .0 * 10.0 12.2 82
Bone Springs Div 9350 15.0 15.6 96 16.1 20.4 79
Grave Springs 8550 4.1 5.9 69 12.0 14.8 81
Kirwin 9550 6.9 10.1 68 14.6 15.5 94
Marquette 8760 5.2 -M * 13.6 -M *
Middle Powder 7760 .3 8.3 4 12.2 15.9 77
Owl Creek 8975 .0 .0 * 9.9 9.3 106
Powder River Pass 9480 3.7 8.0 46 -M 16.8 *
Shell Creek 9580 14.9 16.4 91 13.9 18.2 76
Timber Creek 7950 .1 .0 * 10.2 11.8 86
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Basin Index (%) 76 83
SHOSHONE RIVER
Blackwater 9780 27.4 24.9 110 30.6 25.4 120
Evening Star 9200 26.4 25.1 105 35.3 32.7 108
Marquette 8760 5.2 -M * 13.6 -M *
Sylvan Lake 8420 14.6 16.7 87 31.8 27.1 117
Sylvan Road 7120 .0 .0 * 19.2 19.9 96
Younts Peak 8350 -M 13.3 * -M 19.2 *
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Basin Index (%) 103 111
POWDER RIVER
Bear Trap Meadow 8200 .0 .0 * 10.0 12.2 82
Cloud Peak Reservoir 9860 12.8 16.1 80 15.3 19.1 80
Grave Springs 8550 4.1 5.9 69 12.0 14.8 81
Hansen Sawmill 8360 .1 .0 * 10.7 12.5 86
Middle Powder 7760 .3 8.3 4 12.2 15.9 77
Powder River Pass 9480 3.7 8.0 46 -M 16.8 *
Soldier Park 8720 .1 -M * 9.9 -M *
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Basin Index (%) 55 81
TONGUE RIVER
Big Goose 7990 6.9 8.2 84 15.0 16.7 90
Bone Springs Div 9350 15.0 15.6 96 16.1 20.4 79
Burgess Junction 7880 7.3 10.2 72 12.5 16.6 75
Dome Lake 8880 6.8 9.2 74 13.9 18.6 75
Little Goose 8870 8.9 -M * 11.4 -M *
Sucker Creek 8880 10.1 10.8 94 15.4 19.8 78
Tie Creek 6870 .2 .0 * 15.9 16.9 94
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Basin Index (%) 86 81
BELLE FOURCHE
Blind Park 6890 .0 .0 * 10.1 16.3 62
Cole Canyon 5910 .0 .0 * 16.3 14.5 112
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Basin Index (%) * 86
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 10.1 16.3 62
North Rapid Creek 6130 -M .0 * -M 14.2 *
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Basin Index (%) * 62
UPPER N. PLATTE
Arapaho Ridge 10960 23.5 21.1 111 30.8 28.4 108
Blackhall Mtn 9820 30.3 -M * 39.0 -M *
Columbine 9160 9.7 7.5 129 33.2 30.3 110
Divide Peak 8880 8.3 9.6 86 28.3 26.1 108
Joe Wright 10120 20.7 22.6 92 35.0 32.3 108
Laprele Creek 8375 .0 .0 * 17.6 16.5 107
Med Bow 10500 40.6 -M * 41.4 -M *
Never Summer 10280 23.6 22.0 107 23.0 -M *
North French Creek 10130 29.2 31.8 92 35.4 33.2 107
Old Battle 10000 39.3 34.5 114 43.0 41.6 103
Rawah 9020 .5 1.2 42 20.5 18.8 109
Sage Creek Basin 7850 -M .0 * 19.3 17.2 112
Sand Lake 10050 31.1 29.9 104 30.1 31.4 96
South Brush Creek 8440 .0 1.0 0* 16.0 19.7 81
Tower 10500 56.0 49.5 113 53.3 47.3 113
Webber Springs 9250 18.9 15.6 121 36.5 31.8 115
Whiskey Park 8950 -M 24.2 * -M 33.6 *
Willow Creek Pass 9540 15.2 11.0 138 21.0 17.1 123
Zirkel 9340 19.2 15.6 123 43.3 33.3 130
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Basin Index (%) 108 109
SWEETWATER
Deer Park 9700 13.2 13.0 102 23.5 25.6 92
Larsen Creek 9000 .1 4.7 2 16.9 -M *
South Pass 9040 10.2 9.7 105 17.1 22.2 77
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Basin Index (%) 86 85
LOWER N. PLATTE
Casper Mtn. 7900 6.5 8.3 78 16.6 20.0 83
Laprele Creek 8375 .0 .0 * 17.6 16.5 107
Reno Hill 8400 10.7 7.2 149 22.0 21.0 105
Windy Peak 7900 .1 .0 * 14.6 14.3 102
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Basin Index (%) 112 99
LARAMIE RIVER
Brooklyn Lake 10240 19.2 19.2 100 31.3 26.7 117
Cinnabar Park 9574 15.3 14.8 103 28.3 29.3 97
Crow Creek 8330 .0 .0 * 13.7 15.0 91
Deadman Hill 10220 19.0 18.2 104 24.4 22.5 108
Rawah 9020 .5 1.2 42 20.5 18.8 109
Roach 9700 11.5 13.5 85 26.8 24.1 111
Windy Peak 7900 .1 .0 * 14.6 14.3 102
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Basin Index (%) 98 106
S. PLATTE
Black Mountain 8920 1.8 -M * 18.0 -M *
Crow Creek 8330 .0 .0 * 13.7 15.0 91
Deadman Hill 10220 19.0 18.2 104 24.4 22.5 108
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Basin Index (%) 104* 102
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * 20.1 18.4 109
Divide Peak 8880 8.3 9.6 86 28.3 26.1 108
Elk River 8700 4.3 2.2 195 23.5 24.3 97
Little Snake River 8915 19.7 17.3 114 43.6 35.0 125
Old Battle 10000 39.3 34.5 114 43.0 41.6 103
Sage Creek Basin 7850 -M .0 * 19.3 17.2 112
Sandstone RS 8150 -M .0 * 22.4 22.3 100
Whiskey Park 8950 -M 24.2 * -M 33.6 *
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Basin Index (%) 113 108
UPPER GREEN RIVER
Big Sandy Opening 9080 8.8 7.0 126 18.2 16.6 110
Blind Bull Sum 8650 25.8 21.8 118 22.1 22.9 97
East Rim Divide 7930 .0 3.3 0 14.6 13.9 105
Elkhart Park G.S. 9400 10.1 8.0 126 17.2 16.5 104
Gros Ventre Summit 8750 1.8 8.2 22 14.9 15.8 94
Gunsight Pass 9820 12.8 12.0 107 19.2 17.5 110
Indian Creek 9425 17.9 20.9 86 22.0 26.7 82
Kendall R.S. 7740 .0 .0 * 14.3 16.5 87
Loomis Park 8240 5.7 5.4 106 20.2 20.3 100
New Fork Lake 8340 .0 .7 0* 13.5 13.3 102
Pocket Creek 9360 11.0 -M * 18.0 -M *
Snider Basin 8060 .0 3.9 0 15.7 16.6 95
Spring Creek Divide 9000 20.6 22.3 92 27.6 27.8 99
Triple Peak 8500 13.5 12.0 112 30.0 29.9 100
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Basin Index (%) 93 98
LOWER GREEN RIVER
Blacks Fork Jct 8869 .2 -M * 16.0 -M *
Buck Pasture 9632 9.6 -M * 24.6 -M *
EF Blacks Fork GS 9360 .7 -M * 15.7 -M *
Hams Fork 7840 .0 .0 * 15.2 14.2 107
Hewinta 9500 .0 .0 * 18.6 17.5 106
Hickerson Park 9122 .5 .0 * 15.0 13.2 114
Hole-in-Rock 9168 .0 .0 * 14.3 12.8 112
Indian Creek 9425 17.9 20.9 86 22.0 26.7 82
Kelley R.S. 8180 4.0 5.8 69 19.2 21.5 89
Spirit Lk 10235 12.3 -M * 20.9 -M *
Steel Creek Park 10158 14.8 16.1 92 23.3 20.7 113
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Basin Index (%) 87* 101
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 18.6 -M *
Bug Lake 7987 11.1 9.4 118 28.1 23.2 121
Burts Miller Ranch 8000 -M -M * -M -M *
Chalk Creek #1 9171 18.2 18.7 97 34.3 30.5 112
Hayden Fork 9130 1.5 2.1 71 27.8 25.5 109
Kelley R.S. 8180 4.0 5.8 69 19.2 21.5 89
Lily Lake 9133 3.6 .7 514* 20.1 21.1 95
Monte Cristo 8932 26.1 18.4 142 37.2 31.3 119
Salt River Summit 7640 .0 1.0 0* 19.3 19.6 98
Spring Creek Divide 9000 20.6 22.3 92 27.6 27.8 99
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Basin Index (%) 109 107
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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.
