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 TUESDAY: MAY 14 , 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 5.5 2.0 275 24.6 24.0 102
Black Bear 8170 41.6 36.3 115 49.7 43.7 114
Blind Bull Sum 8650 24.8 22.1 112 22.0 22.7 97
Cottonwood Creek 7670 12.5 10.9 115 30.5 29.4 104
East Rim Divide 7930 .0 4.5 0 14.6 13.8 106
Grand Targhee 9260 46.5 45.5 102 38.5 36.6 105
Granite Creek 6770 5.6 2.4 233 23.8 22.5 106
Grassy Lake 7265 -M 23.1 * -M 41.1 *
Gros Ventre Summit 8750 3.2 9.0 36 14.9 15.7 95
Gunsight Pass 9820 13.7 12.4 110 19.2 17.4 110
Lewis Lake Divide 7850 27.0 27.1 100 43.5 40.2 108
Phillips Bench 8200 22.6 22.3 101 36.2 32.3 112
Salt River Summit 7640 2.7 2.1 129 19.3 19.4 99
Snake River Station 6920 .4 .0 * 28.6 25.9 110
Spring Creek Divide 9000 22.3 22.8 98 27.5 27.6 100
Thumb Divide 7980 9.2 5.9 156 22.4 22.2 101
Togwotee Pass 9580 24.4 24.8 98 29.2 29.1 100
Two Ocean Plateau 9240 30.6 29.3 104 30.0 32.1 93
Willow Creek 8080 21.7 19.7 110 41.2 40.1 103
Younts Peak 8350 -M 14.2 * -M 19.0 *
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Basin Index (%) 105 104
MADISON-GALLATIN
Black Bear 8170 41.6 36.3 115 49.7 43.7 114
Canyon 7870 7.9 5.8 136 19.0 19.3 98
Madison Plateau 7750 23.6 17.8 133 32.3 30.5 106
West Yellowstone 6700 .0 .0 * 19.8 17.0 116
Whiskey Creek 6800 12.0 9.1 132 24.8 23.5 106
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Basin Index (%) 123 109
YELLOWSTONE
Beartooth Lake 9360 24.9 22.7 110 24.6 23.6 104
Burnt Mtn 5880 .0 .0 * 20.2 18.7 108
Canyon 7870 7.9 5.8 136 19.0 19.3 98
Cole Creek 7850 19.9 17.2 116 -M 18.9 *
Evening Star 9200 27.8 25.4 109 35.2 32.4 109
Fisher Creek 9100 35.8 34.3 104 41.6 37.3 112
Northeast Entrance 7350 .1 .2 50* 17.3 15.0 115
Parker Peak 9400 27.1 21.9 124 29.2 21.7 135
Sylvan Lake 8420 16.8 17.3 97 31.7 26.8 118
Thumb Divide 7980 9.2 5.9 156 22.4 22.2 101
Two Ocean Plateau 9240 30.6 29.3 104 30.0 32.1 93
White Mill 8700 25.6 24.6 104 24.8 28.1 88
Wolverine 7650 .0 .0 * 16.0 15.0 107
Younts Peak 8350 -M 14.2 * -M 19.0 *
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Basin Index (%) 110 107
WIND RIVER
Burroughs Creek 8750 5.2 -M * 16.9 -M *
Castle Creek 8400 .0 -M * 9.1 -M *
Cold Springs 9630 1.6 .5 320* 12.3 14.0 88
Deer Park 9700 14.5 13.9 104 23.4 25.5 92
Hobbs Park 10100 18.3 15.3 120 18.2 18.6 98
Kirwin 9550 8.4 10.5 80 14.6 15.3 95
Little Warm 9370 5.6 6.4 88 11.0 16.8 65
Owl Creek 8975 .0 .0 * 9.9 9.1 109
South Pass 9040 11.8 10.5 112 17.0 22.0 77
St. Lawrence Alt 8620 -M .2 * -M 13.1 *
Togwotee Pass 9580 24.4 24.8 98 29.2 29.1 100
Townsend Creek 8700 8.7 1.8 483 16.9 16.5 102
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Basin Index (%) 111 91
BIGHORN BASIN
Bald Mtn. 9380 20.5 20.8 99 17.5 21.6 81
Bear Trap Meadow 8200 .0 .0 * 9.5 12.1 79
Bone Springs Div 9350 16.2 16.2 100 16.1 20.2 80
Grave Springs 8550 5.6 6.8 82 11.8 14.7 80
Kirwin 9550 8.4 10.5 80 14.6 15.3 95
Marquette 8760 6.7 -M * 13.1 -M *
Middle Powder 7760 3.2 9.4 34 11.5 15.8 73
Owl Creek 8975 .0 .0 * 9.9 9.1 109
Powder River Pass 9480 5.3 8.5 62 -M 16.7 *
Shell Creek 9580 16.1 16.7 96 13.9 18.1 77
Timber Creek 7950 .1 .2 50* 10.1 11.7 86
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Basin Index (%) 85 83
SHOSHONE RIVER
Blackwater 9780 28.8 24.6 117 30.4 25.2 121
Evening Star 9200 27.8 25.4 109 35.2 32.4 109
Marquette 8760 6.7 -M * 13.1 -M *
Sylvan Lake 8420 16.8 17.3 97 31.7 26.8 118
Sylvan Road 7120 .0 .1 0* 19.2 19.7 97
Younts Peak 8350 -M 14.2 * -M 19.0 *
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Basin Index (%) 109 112
POWDER RIVER
Bear Trap Meadow 8200 .0 .0 * 9.5 12.1 79
Cloud Peak Reservoir 9860 13.9 16.4 85 15.2 18.8 81
Grave Springs 8550 5.6 6.8 82 11.8 14.7 80
Hansen Sawmill 8360 .4 .0 * 10.7 12.4 86
Middle Powder 7760 3.2 9.4 34 11.5 15.8 73
Powder River Pass 9480 5.3 8.5 62 -M 16.7 *
Soldier Park 8720 .0 -M * 9.9 -M *
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Basin Index (%) 69 80
TONGUE RIVER
Big Goose 7990 8.6 9.2 93 15.1 16.6 91
Bone Springs Div 9350 16.2 16.2 100 16.1 20.2 80
Burgess Junction 7880 8.7 10.9 80 12.4 16.5 75
Dome Lake 8880 8.3 10.3 81 13.8 18.5 75
Little Goose 8870 10.9 -M * 11.5 -M *
Sucker Creek 8880 11.7 11.8 99 15.4 19.6 79
Tie Creek 6870 .8 .5 160* 15.9 16.7 95
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Basin Index (%) 92 82
BELLE FOURCHE
Blind Park 6890 .0 .0 * 10.1 16.1 63
Cole Canyon 5910 .0 .0 * 15.9 14.3 111
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Basin Index (%) * 86
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 10.1 16.1 63
North Rapid Creek 6130 -M .0 * -M 14.1 *
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Basin Index (%) * 63
UPPER N. PLATTE
Arapaho Ridge 10960 24.7 21.9 113 30.9 28.1 110
Blackhall Mtn 9820 32.3 -M * 39.0 -M *
Columbine 9160 11.8 9.4 126 33.1 30.1 110
Divide Peak 8880 11.0 11.3 97 28.3 25.9 109
Joe Wright 10120 21.8 23.0 95 35.0 32.0 109
Laprele Creek 8375 1.0 .0 * 17.4 16.4 106
Med Bow 10500 41.9 -M * 41.3 -M *
Never Summer 10280 24.5 22.2 110 23.0 -M *
North French Creek 10130 30.9 32.2 96 35.4 33.0 107
Old Battle 10000 40.1 35.8 112 43.0 41.5 104
Rawah 9020 2.1 1.5 140 20.5 18.7 110
Sage Creek Basin 7850 .6 .0 * 19.3 17.1 113
Sand Lake 10050 32.2 30.9 104 30.1 31.1 97
South Brush Creek 8440 .0 2.1 0 15.5 19.5 79
Tower 10500 55.9 50.3 111 53.3 47.1 113
Webber Springs 9250 20.9 17.1 122 36.5 31.6 116
Whiskey Park 8950 25.6 25.1 102 38.1 33.4 114
Willow Creek Pass 9540 16.5 11.8 140 21.1 16.9 125
Zirkel 9340 21.8 17.6 124 43.3 33.1 131
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Basin Index (%) 109 110
SWEETWATER
Deer Park 9700 14.5 13.9 104 23.4 25.5 92
Larsen Creek 9000 .1 5.3 2 16.8 -M *
South Pass 9040 11.8 10.5 112 17.0 22.0 77
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Basin Index (%) 89 85
LOWER N. PLATTE
Casper Mtn. 7900 8.9 9.8 91 16.5 19.9 83
Laprele Creek 8375 1.0 .0 * 17.4 16.4 106
Reno Hill 8400 12.6 8.4 150 21.9 20.7 106
Windy Peak 7900 .5 .0 * 14.4 14.2 101
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Basin Index (%) 126 99
LARAMIE RIVER
Brooklyn Lake 10240 21.3 20.2 105 31.3 26.5 118
Cinnabar Park 9574 17.2 15.8 109 28.3 29.1 97
Crow Creek 8330 .0 .0 * 13.7 14.8 93
Deadman Hill 10220 21.2 18.4 115 24.3 22.3 109
Rawah 9020 2.1 1.5 140 20.5 18.7 110
Roach 9700 13.4 14.2 94 26.9 23.9 113
Windy Peak 7900 .5 .0 * 14.4 14.2 101
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Basin Index (%) 108 107
S. PLATTE
Black Mountain 8920 4.5 -M * 17.9 -M *
Crow Creek 8330 .0 .0 * 13.7 14.8 93
Deadman Hill 10220 21.2 18.4 115 24.3 22.3 109
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Basin Index (%) 115* 102
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * 20.1 18.3 110
Divide Peak 8880 11.0 11.3 97 28.3 25.9 109
Elk River 8700 6.7 4.2 160 23.4 24.1 97
Little Snake River 8915 21.5 18.7 115 43.5 34.9 125
Old Battle 10000 40.1 35.8 112 43.0 41.5 104
Sage Creek Basin 7850 .6 .0 * 19.3 17.1 113
Sandstone RS 8150 .0 .0 * 22.0 22.2 99
Whiskey Park 8950 25.6 25.1 102 38.1 33.4 114
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Basin Index (%) 111 109
UPPER GREEN RIVER
Big Sandy Opening 9080 10.4 8.1 128 18.0 16.5 109
Blind Bull Sum 8650 24.8 22.1 112 22.0 22.7 97
East Rim Divide 7930 .0 4.5 0 14.6 13.8 106
Elkhart Park G.S. 9400 11.6 8.9 130 17.2 16.3 106
Gros Ventre Summit 8750 3.2 9.0 36 14.9 15.7 95
Gunsight Pass 9820 13.7 12.4 110 19.2 17.4 110
Indian Creek 9425 19.3 21.3 91 22.0 26.6 83
Kendall R.S. 7740 .1 .0 * 14.5 16.4 88
Loomis Park 8240 7.4 6.2 119 20.2 20.2 100
New Fork Lake 8340 1.1 1.4 79 13.3 13.2 101
Pocket Creek 9360 12.5 -M * 18.0 -M *
Snider Basin 8060 .0 5.6 0 15.8 16.5 96
Spring Creek Divide 9000 22.3 22.8 98 27.5 27.6 100
Triple Peak 8500 15.3 13.3 115 30.0 29.7 101
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Basin Index (%) 95 99
LOWER GREEN RIVER
Blacks Fork Jct 8869 .2 -M * 16.1 -M *
Buck Pasture 9632 11.9 -M * 24.6 -M *
EF Blacks Fork GS 9360 2.4 -M * 15.4 -M *
Hams Fork 7840 .0 .0 * 15.2 14.1 108
Hewinta 9500 2.1 .2 1050* 18.6 17.4 107
Hickerson Park 9122 .6 .0 * 14.9 13.1 114
Hole-in-Rock 9168 .0 .0 * 14.3 12.7 113
Indian Creek 9425 19.3 21.3 91 22.0 26.6 83
Kelley R.S. 8180 5.9 7.0 84 19.2 21.4 90
Spirit Lk 10235 13.8 -M * 20.8 -M *
Steel Creek Park 10158 16.5 16.9 98 23.3 20.6 113
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Basin Index (%) 98* 101
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 18.6 -M *
Bug Lake 7987 13.5 10.9 124 28.1 23.0 122
Burts Miller Ranch 8000 -M -M * 10.8 -M *
Chalk Creek #1 9171 20.0 19.9 101 34.3 30.4 113
Hayden Fork 9130 4.0 3.8 105 27.8 25.4 109
Kelley R.S. 8180 5.9 7.0 84 19.2 21.4 90
Lily Lake 9133 5.8 2.1 276 20.1 21.0 96
Monte Cristo 8932 28.3 19.6 144 37.2 31.2 119
Salt River Summit 7640 2.7 2.1 129 19.3 19.4 99
Spring Creek Divide 9000 22.3 22.8 98 27.5 27.6 100
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Basin Index (%) 116 107
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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.