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 MONDAY: MAY 6 , 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 11.5 6.6 174 24.5 23.3 105
Black Bear 8170 43.3 37.1 117 49.0 42.5 115
Blind Bull Sum 8650 24.1 22.7 106 21.4 21.8 98
Cottonwood Creek 7670 17.1 13.7 125 29.5 28.1 105
East Rim Divide 7930 .0 7.1 0 14.0 13.2 106
Grand Targhee 9260 48.5 46.2 105 38.1 35.5 107
Granite Creek 6770 10.9 7.1 154 23.5 21.7 108
Grassy Lake 7265 -M 27.3 * -M 39.9 *
Gros Ventre Summit 8750 6.0 10.5 57 14.7 15.0 98
Gunsight Pass 9820 15.5 11.7 132 18.9 16.4 115
Lewis Lake Divide 7850 33.4 29.4 114 43.2 39.2 110
Phillips Bench 8200 27.3 23.9 114 35.8 31.3 114
Salt River Summit 7640 7.6 6.7 113 18.9 18.7 101
Snake River Station 6920 8.6 4.6 187 28.3 25.2 112
Spring Creek Divide 9000 23.9 24.1 99 26.5 26.7 99
Thumb Divide 7980 13.8 10.0 138 21.8 21.4 102
Togwotee Pass 9580 26.1 24.9 105 28.8 27.9 103
Two Ocean Plateau 9240 34.6 29.8 116 29.8 30.7 97
Willow Creek 8080 27.5 21.8 126 40.2 38.5 104
Younts Peak 8350 -M 15.7 * -M 18.1 *
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Basin Index (%) 112 106
MADISON-GALLATIN
Black Bear 8170 43.3 37.1 117 49.0 42.5 115
Canyon 7870 11.6 8.5 136 18.6 18.4 101
Madison Plateau 7750 27.7 20.7 134 31.5 29.5 107
West Yellowstone 6700 .1 .0 * 19.2 16.3 118
Whiskey Creek 6800 15.0 12.4 121 24.1 22.7 106
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Basin Index (%) 124 110
YELLOWSTONE
Beartooth Lake 9360 25.0 22.8 110 23.3 22.4 104
Burnt Mtn 5880 2.9 .0 * 19.0 16.4 116
Canyon 7870 11.6 8.5 136 18.6 18.4 101
Cole Creek 7850 20.5 16.9 121 -M 16.9 *
Evening Star 9200 28.8 25.0 115 34.3 31.1 110
Fisher Creek 9100 36.6 33.2 110 41.1 35.8 115
Northeast Entrance 7350 1.3 1.0 130 17.0 14.1 121
Parker Peak 9400 28.3 21.5 132 28.2 20.6 137
Sylvan Lake 8420 20.0 18.5 108 31.1 25.6 121
Thumb Divide 7980 13.8 10.0 138 21.8 21.4 102
Two Ocean Plateau 9240 34.6 29.8 116 29.8 30.7 97
White Mill 8700 28.1 24.1 117 24.5 26.8 91
Wolverine 7650 2.5 .6 417* 15.1 14.1 107
Younts Peak 8350 -M 15.7 * -M 18.1 *
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Basin Index (%) 120 110
WIND RIVER
Burroughs Creek 8750 8.9 -M * 16.8 -M *
Castle Creek 8400 .0 -M * 8.4 -M *
Cold Springs 9630 4.4 1.5 293 11.2 13.0 86
Deer Park 9700 15.4 14.9 103 22.1 24.1 92
Hobbs Park 10100 17.5 15.9 110 16.2 17.3 94
Kirwin 9550 10.0 10.7 93 13.6 14.4 94
Little Warm 9370 8.7 7.5 116 11.1 15.8 70
Owl Creek 8975 .1 .6 17 9.1 8.3 110
South Pass 9040 13.1 13.4 98 15.6 20.9 75
St. Lawrence Alt 8620 -M 1.6 * -M 12.0 *
Togwotee Pass 9580 26.1 24.9 105 28.8 27.9 103
Townsend Creek 8700 9.1 5.7 160 14.7 15.4 95
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Basin Index (%) 110 91
BIGHORN BASIN
Bald Mtn. 9380 18.3 20.4 90 14.8 20.2 73
Bear Trap Meadow 8200 .0 .2 0* 8.6 11.1 77
Bone Springs Div 9350 15.5 16.3 95 14.4 18.8 77
Grave Springs 8550 6.9 8.8 78 11.1 13.5 82
Kirwin 9550 10.0 10.7 93 13.6 14.4 94
Marquette 8760 7.3 -M * 11.7 -M *
Middle Powder 7760 5.9 11.2 53 10.9 14.7 74
Owl Creek 8975 .1 .6 17 9.1 8.3 110
Powder River Pass 9480 7.9 9.1 87 -M 15.6 *
Shell Creek 9580 15.3 16.3 94 12.6 16.8 75
Timber Creek 7950 .2 2.1 10 9.0 10.6 85
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Basin Index (%) 84 81
SHOSHONE RIVER
Blackwater 9780 29.1 25.7 113 29.7 24.1 123
Evening Star 9200 28.8 25.0 115 34.3 31.1 110
Marquette 8760 7.3 -M * 11.7 -M *
Sylvan Lake 8420 20.0 18.5 108 31.1 25.6 121
Sylvan Road 7120 .1 3.3 3 18.8 18.9 99
Younts Peak 8350 -M 15.7 * -M 18.1 *
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Basin Index (%) 108 114
POWDER RIVER
Bear Trap Meadow 8200 .0 .2 0* 8.6 11.1 77
Cloud Peak Reservoir 9860 13.0 16.4 79 13.5 17.3 78
Grave Springs 8550 6.9 8.8 78 11.1 13.5 82
Hansen Sawmill 8360 3.3 1.6 206 10.0 11.3 88
Middle Powder 7760 5.9 11.2 53 10.9 14.7 74
Powder River Pass 9480 7.9 9.1 87 -M 15.6 *
Soldier Park 8720 1.2 -M * 9.1 -M *
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Basin Index (%) 78 80
TONGUE RIVER
Big Goose 7990 7.8 9.9 79 12.8 14.9 86
Bone Springs Div 9350 15.5 16.3 95 14.4 18.8 77
Burgess Junction 7880 8.2 11.6 71 10.6 15.3 69
Dome Lake 8880 7.6 11.3 67 11.5 17.0 68
Little Goose 8870 10.2 -M * 10.1 -M *
Sucker Creek 8880 10.6 12.0 88 12.5 18.0 69
Tie Creek 6870 1.0 2.2 45 13.6 15.0 91
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Basin Index (%) 80 76
BELLE FOURCHE
Blind Park 6890 .0 .0 * 9.3 14.9 62
Cole Canyon 5910 .0 .0 * 14.8 12.7 117
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Basin Index (%) * 87
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 9.3 14.9 62
North Rapid Creek 6130 .0 .0 * -M 12.8 *
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Basin Index (%) * 62
UPPER N. PLATTE
Arapaho Ridge 10960 25.0 22.3 112 29.8 26.8 111
Blackhall Mtn 9820 33.4 -M * 38.4 -M *
Columbine 9160 15.8 15.8 100 32.4 29.2 111
Divide Peak 8880 14.7 16.8 88 27.3 24.9 110
Joe Wright 10120 22.2 22.8 97 34.3 30.7 112
Laprele Creek 8375 5.5 4.9 112 16.6 15.5 107
Med Bow 10500 41.4 -M * 40.6 -M *
Never Summer 10280 25.1 22.0 114 22.6 -M *
North French Creek 10130 31.9 32.8 97 34.9 31.5 111
Old Battle 10000 40.5 35.3 115 42.1 40.0 105
Rawah 9020 6.2 4.2 148 20.2 17.7 114
Sage Creek Basin 7850 7.3 .4 1825* 19.1 16.6 115
Sand Lake 10050 32.5 31.7 103 29.2 29.7 98
South Brush Creek 8440 .4 7.1 6 14.9 18.4 81
Tower 10500 54.7 51.2 107 52.2 45.7 114
Webber Springs 9250 22.9 20.7 111 35.5 30.5 116
Whiskey Park 8950 28.4 27.1 105 37.6 32.2 117
Willow Creek Pass 9540 17.6 14.4 122 20.8 16.1 129
Zirkel 9340 26.1 20.5 127 42.5 31.7 134
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Basin Index (%) 108 112
SWEETWATER
Deer Park 9700 15.4 14.9 103 22.1 24.1 92
Larsen Creek 9000 1.0 7.7 13 16.4 -M *
South Pass 9040 13.1 13.4 98 15.6 20.9 75
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Basin Index (%) 82 84
LOWER N. PLATTE
Casper Mtn. 7900 10.1 12.0 84 15.0 18.8 80
Laprele Creek 8375 5.5 4.9 112 16.6 15.5 107
Reno Hill 8400 14.6 11.9 123 20.7 19.5 106
Windy Peak 7900 3.4 2.4 142 13.5 13.4 101
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Basin Index (%) 108 98
LARAMIE RIVER
Brooklyn Lake 10240 23.9 22.5 106 30.4 25.3 120
Cinnabar Park 9574 18.8 18.2 103 27.5 27.7 99
Crow Creek 8330 .0 .0 * 13.2 13.9 95
Deadman Hill 10220 22.3 19.0 117 23.6 21.2 111
Rawah 9020 6.2 4.2 148 20.2 17.7 114
Roach 9700 15.1 16.8 90 25.8 22.8 113
Windy Peak 7900 3.4 2.4 142 13.5 13.4 101
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Basin Index (%) 108 109
S. PLATTE
Black Mountain 8920 7.4 -M * 16.9 -M *
Crow Creek 8330 .0 .0 * 13.2 13.9 95
Deadman Hill 10220 22.3 19.0 117 23.6 21.2 111
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Basin Index (%) 117* 105
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * 20.0 17.5 114
Divide Peak 8880 14.7 16.8 88 27.3 24.9 110
Elk River 8700 11.5 10.7 107 23.2 23.3 100
Little Snake River 8915 25.7 21.2 121 43.1 33.5 129
Old Battle 10000 40.5 35.3 115 42.1 40.0 105
Sage Creek Basin 7850 7.3 .4 1825* 19.1 16.6 115
Sandstone RS 8150 6.3 3.6 175 21.9 21.2 103
Whiskey Park 8950 28.4 27.1 105 37.6 32.2 117
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Basin Index (%) 117 112
UPPER GREEN RIVER
Big Sandy Opening 9080 12.8 8.8 145 17.4 15.6 112
Blind Bull Sum 8650 24.1 22.7 106 21.4 21.8 98
East Rim Divide 7930 .0 7.1 0 14.0 13.2 106
Elkhart Park G.S. 9400 13.9 10.1 138 17.0 15.4 110
Gros Ventre Summit 8750 6.0 10.5 57 14.7 15.0 98
Gunsight Pass 9820 15.5 11.7 132 18.9 16.4 115
Indian Creek 9425 20.2 21.5 94 20.4 25.5 80
Kendall R.S. 7740 3.5 1.4 250 13.9 15.8 88
Loomis Park 8240 11.0 8.9 124 19.7 19.3 102
New Fork Lake 8340 4.6 4.5 102 12.0 12.5 96
Pocket Creek 9360 14.1 -M * 17.4 -M *
Snider Basin 8060 .8 8.0 10 14.9 15.9 94
Spring Creek Divide 9000 23.9 24.1 99 26.5 26.7 99
Triple Peak 8500 18.9 15.7 120 29.1 28.5 102
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Basin Index (%) 100 99
LOWER GREEN RIVER
Blacks Fork Jct 8869 2.8 -M * 15.8 -M *
Buck Pasture 9632 14.0 -M * 23.9 -M *
EF Blacks Fork GS 9360 6.4 -M * 14.9 -M *
Hams Fork 7840 .0 .7 0* 13.9 13.4 104
Hewinta 9500 5.5 3.7 149 18.1 16.7 108
Hickerson Park 9122 1.8 2.2 82 14.1 12.4 114
Hole-in-Rock 9168 .4 1.3 31 13.5 12.0 112
Indian Creek 9425 20.2 21.5 94 20.4 25.5 80
Kelley R.S. 8180 9.3 9.5 98 18.3 20.6 89
Spirit Lk 10235 13.8 -M * 19.9 -M *
Steel Creek Park 10158 17.0 17.5 97 22.7 19.7 115
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Basin Index (%) 96 101
UPPER BEAR RIVER
Bear River RS 8777 .5 -M * 17.9 -M *
Bug Lake 7987 17.9 13.1 137 27.2 22.2 123
Burts Miller Ranch 8000 -M -M * 10.3 -M *
Chalk Creek #1 9171 22.6 22.8 99 33.4 29.2 114
Hayden Fork 9130 8.7 7.6 114 27.1 24.4 111
Kelley R.S. 8180 9.3 9.5 98 18.3 20.6 89
Lily Lake 9133 8.0 8.6 93 19.4 20.1 97
Monte Cristo 8932 31.4 24.0 131 36.1 30.0 120
Salt River Summit 7640 7.6 6.7 113 18.9 18.7 101
Spring Creek Divide 9000 23.9 24.1 99 26.5 26.7 99
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Basin Index (%) 111 108
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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.