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 7 , 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 10.4 6.1 170 24.5 23.4 105
Black Bear 8170 43.1 37.0 116 49.0 42.6 115
Blind Bull Sum 8650 23.8 22.6 105 21.4 21.9 98
Cottonwood Creek 7670 16.6 13.5 123 29.5 28.3 104
East Rim Divide 7930 .0 6.9 0 14.1 13.3 106
Grand Targhee 9260 49.7 46.4 107 38.1 35.7 107
Granite Creek 6770 10.4 6.7 155 23.5 21.9 107
Grassy Lake 7265 -M 27.0 * -M 40.1 *
Gros Ventre Summit 8750 6.1 10.2 60 14.7 15.1 97
Gunsight Pass 9820 15.3 11.7 131 18.9 16.5 115
Lewis Lake Divide 7850 32.2 29.4 110 43.1 39.3 110
Phillips Bench 8200 26.6 23.6 113 35.8 31.4 114
Salt River Summit 7640 6.8 6.2 110 18.8 18.8 100
Snake River Station 6920 7.2 4.0 180 28.2 25.3 111
Spring Creek Divide 9000 23.4 24.1 97 26.5 26.8 99
Thumb Divide 7980 13.1 9.7 135 21.8 21.5 101
Togwotee Pass 9580 25.7 25.0 103 28.8 28.1 102
Two Ocean Plateau 9240 33.5 29.8 112 29.8 30.8 97
Willow Creek 8080 26.5 21.7 122 40.2 38.6 104
Younts Peak 8350 -M 15.6 * -M 18.3 *
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Basin Index (%) 111 106
MADISON-GALLATIN
Black Bear 8170 43.1 37.0 116 49.0 42.6 115
Canyon 7870 10.8 8.2 132 18.5 18.5 100
Madison Plateau 7750 26.9 20.7 130 31.5 29.6 106
West Yellowstone 6700 .0 .0 * 19.2 16.4 117
Whiskey Creek 6800 14.5 11.9 122 24.1 22.8 106
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Basin Index (%) 122 110
YELLOWSTONE
Beartooth Lake 9360 25.0 22.9 109 23.7 22.7 104
Burnt Mtn 5880 2.9 .0 * 19.0 16.6 114
Canyon 7870 10.8 8.2 132 18.5 18.5 100
Cole Creek 7850 20.3 16.9 120 -M 17.2 *
Evening Star 9200 28.6 25.1 114 34.4 31.3 110
Fisher Creek 9100 36.5 33.4 109 41.2 36.1 114
Northeast Entrance 7350 .2 1.0 20 17.1 14.3 120
Parker Peak 9400 28.5 21.6 132 28.5 20.7 138
Sylvan Lake 8420 19.4 18.4 105 31.1 25.9 120
Thumb Divide 7980 13.1 9.7 135 21.8 21.5 101
Two Ocean Plateau 9240 33.5 29.8 112 29.8 30.8 97
White Mill 8700 27.8 24.3 114 24.5 27.0 91
Wolverine 7650 1.5 .5 300* 15.2 14.2 107
Younts Peak 8350 -M 15.6 * -M 18.3 *
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Basin Index (%) 117 109
WIND RIVER
Burroughs Creek 8750 8.3 -M * 16.8 -M *
Castle Creek 8400 .0 -M * 8.6 -M *
Cold Springs 9630 3.7 1.6 231 11.2 13.1 85
Deer Park 9700 15.2 14.7 103 22.2 24.2 92
Hobbs Park 10100 17.4 15.9 109 16.2 17.4 93
Kirwin 9550 9.6 10.8 89 13.6 14.5 94
Little Warm 9370 8.1 7.1 114 11.2 15.9 70
Owl Creek 8975 .1 .5 20* 9.1 8.4 108
South Pass 9040 12.7 13.1 97 15.7 21.0 75
St. Lawrence Alt 8620 -M 1.5 * -M 12.1 *
Togwotee Pass 9580 25.7 25.0 103 28.8 28.1 102
Townsend Creek 8700 8.7 5.2 167 14.8 15.5 95
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Basin Index (%) 108 90
BIGHORN BASIN
Bald Mtn. 9380 18.5 20.4 91 15.3 20.4 75
Bear Trap Meadow 8200 .0 .2 0* 8.6 11.3 76
Bone Springs Div 9350 15.4 16.4 94 14.8 19.0 78
Grave Springs 8550 6.3 8.5 74 11.1 13.6 82
Kirwin 9550 9.6 10.8 89 13.6 14.5 94
Marquette 8760 6.7 -M * 11.7 -M *
Middle Powder 7760 5.3 11.2 47 10.9 14.8 74
Owl Creek 8975 .1 .5 20* 9.1 8.4 108
Powder River Pass 9480 7.2 9.0 80 -M 15.8 *
Shell Creek 9580 15.2 16.4 93 12.6 17.0 74
Timber Creek 7950 .1 1.9 5 9.0 10.6 85
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Basin Index (%) 82 81
SHOSHONE RIVER
Blackwater 9780 29.0 25.5 114 29.7 24.2 123
Evening Star 9200 28.6 25.1 114 34.4 31.3 110
Marquette 8760 6.7 -M * 11.7 -M *
Sylvan Lake 8420 19.4 18.4 105 31.1 25.9 120
Sylvan Road 7120 .0 2.9 0 18.9 19.0 99
Younts Peak 8350 -M 15.6 * -M 18.3 *
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Basin Index (%) 107 114
POWDER RIVER
Bear Trap Meadow 8200 .0 .2 0* 8.6 11.3 76
Cloud Peak Reservoir 9860 13.1 16.5 79 13.4 17.5 77
Grave Springs 8550 6.3 8.5 74 11.1 13.6 82
Hansen Sawmill 8360 2.8 1.5 187 10.0 11.4 88
Middle Powder 7760 5.3 11.2 47 10.9 14.8 74
Powder River Pass 9480 7.2 9.0 80 -M 15.8 *
Soldier Park 8720 .9 -M * 9.1 -M *
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Basin Index (%) 74 79
TONGUE RIVER
Big Goose 7990 7.7 10.1 76 12.8 15.1 85
Bone Springs Div 9350 15.4 16.4 94 14.8 19.0 78
Burgess Junction 7880 8.1 11.4 71 10.6 15.5 68
Dome Lake 8880 7.4 11.2 66 11.5 17.2 67
Little Goose 8870 10.0 -M * 10.1 -M *
Sucker Creek 8880 10.5 12.1 87 12.5 18.3 68
Tie Creek 6870 1.1 2.1 52 13.8 15.1 91
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Basin Index (%) 79 76
BELLE FOURCHE
Blind Park 6890 .0 .0 * 9.4 14.9 63
Cole Canyon 5910 .0 .0 * 14.9 12.9 116
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Basin Index (%) * 87
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 9.4 14.9 63
North Rapid Creek 6130 .0 .0 * -M 12.9 *
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Basin Index (%) * 63
UPPER N. PLATTE
Arapaho Ridge 10960 24.8 22.3 111 29.8 26.9 111
Blackhall Mtn 9820 33.2 -M * 38.4 -M *
Columbine 9160 14.9 15.1 99 32.4 29.3 111
Divide Peak 8880 13.8 16.3 85 27.3 25.0 109
Joe Wright 10120 21.9 22.9 96 34.3 30.8 111
Laprele Creek 8375 4.7 4.6 102 16.7 15.6 107
Med Bow 10500 41.5 -M * 40.6 -M *
Never Summer 10280 25.0 22.0 114 22.7 -M *
North French Creek 10130 31.7 32.8 97 34.9 31.6 110
Old Battle 10000 40.3 35.8 113 42.1 40.2 105
Rawah 9020 5.6 3.8 147 20.2 17.8 113
Sage Creek Basin 7850 5.6 .2 2800* 19.1 16.6 115
Sand Lake 10050 32.4 31.8 102 29.2 29.9 98
South Brush Creek 8440 .0 6.7 0 14.9 18.5 81
Tower 10500 54.8 51.3 107 52.3 45.9 114
Webber Springs 9250 22.5 20.5 110 35.4 30.6 116
Whiskey Park 8950 -M 27.1 * -M 32.3 *
Willow Creek Pass 9540 17.6 14.3 123 20.8 16.2 128
Zirkel 9340 24.8 20.2 123 42.5 31.8 134
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Basin Index (%) 106 111
SWEETWATER
Deer Park 9700 15.2 14.7 103 22.2 24.2 92
Larsen Creek 9000 .5 7.4 7 16.5 -M *
South Pass 9040 12.7 13.1 97 15.7 21.0 75
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Basin Index (%) 81 84
LOWER N. PLATTE
Casper Mtn. 7900 9.3 11.9 78 15.0 18.9 79
Laprele Creek 8375 4.7 4.6 102 16.7 15.6 107
Reno Hill 8400 13.9 11.8 118 20.8 19.7 106
Windy Peak 7900 2.7 2.0 135 13.7 13.5 101
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Basin Index (%) 101 98
LARAMIE RIVER
Brooklyn Lake 10240 23.3 22.2 105 30.4 25.5 119
Cinnabar Park 9574 18.3 18.1 101 27.5 27.9 99
Crow Creek 8330 .0 .0 * 13.2 14.1 94
Deadman Hill 10220 21.9 18.9 116 23.6 21.3 111
Rawah 9020 5.6 3.8 147 20.2 17.8 113
Roach 9700 14.5 16.6 87 25.8 23.0 112
Windy Peak 7900 2.7 2.0 135 13.7 13.5 101
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Basin Index (%) 106 108
S. PLATTE
Black Mountain 8920 6.3 -M * 17.0 -M *
Crow Creek 8330 .0 .0 * 13.2 14.1 94
Deadman Hill 10220 21.9 18.9 116 23.6 21.3 111
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Basin Index (%) 116* 104
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * 19.9 17.5 114
Divide Peak 8880 13.8 16.3 85 27.3 25.0 109
Elk River 8700 11.0 10.1 109 23.1 23.4 99
Little Snake River 8915 25.0 21.0 119 43.0 33.7 128
Old Battle 10000 40.3 35.8 113 42.1 40.2 105
Sage Creek Basin 7850 5.6 .2 2800* 19.1 16.6 115
Sandstone RS 8150 5.6 3.2 175 21.9 21.3 103
Whiskey Park 8950 -M 27.1 * -M 32.3 *
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Basin Index (%) 117 111
UPPER GREEN RIVER
Big Sandy Opening 9080 12.4 8.7 143 17.5 15.8 111
Blind Bull Sum 8650 23.8 22.6 105 21.4 21.9 98
East Rim Divide 7930 .0 6.9 0 14.1 13.3 106
Elkhart Park G.S. 9400 13.7 10.0 137 17.0 15.6 109
Gros Ventre Summit 8750 6.1 10.2 60 14.7 15.1 97
Gunsight Pass 9820 15.3 11.7 131 18.9 16.5 115
Indian Creek 9425 19.7 21.3 92 20.5 25.6 80
Kendall R.S. 7740 3.0 .7 429* 13.9 15.9 87
Loomis Park 8240 10.3 8.4 123 19.6 19.5 101
New Fork Lake 8340 4.1 4.0 102 12.1 12.6 96
Pocket Creek 9360 13.9 -M * 17.5 -M *
Snider Basin 8060 .3 7.9 4 15.0 16.0 94
Spring Creek Divide 9000 23.4 24.1 97 26.5 26.8 99
Triple Peak 8500 18.4 15.4 119 29.1 28.7 101
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Basin Index (%) 99 99
LOWER GREEN RIVER
Blacks Fork Jct 8869 2.1 -M * 15.8 -M *
Buck Pasture 9632 13.5 -M * 23.9 -M *
EF Blacks Fork GS 9360 5.7 -M * 14.9 -M *
Hams Fork 7840 .0 .5 0* 13.8 13.5 102
Hewinta 9500 4.9 3.4 144 18.1 16.8 108
Hickerson Park 9122 1.6 1.8 89 14.1 12.5 113
Hole-in-Rock 9168 .2 1.0 20 13.5 12.0 112
Indian Creek 9425 19.7 21.3 92 20.5 25.6 80
Kelley R.S. 8180 8.7 9.2 95 18.3 20.7 88
Spirit Lk 10235 13.5 -M * 19.9 -M *
Steel Creek Park 10158 16.9 17.6 96 22.7 19.8 115
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Basin Index (%) 95 100
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 17.9 -M *
Bug Lake 7987 17.1 12.8 134 27.2 22.3 122
Burts Miller Ranch 8000 -M -M * 10.3 -M *
Chalk Creek #1 9171 21.9 22.5 97 33.5 29.3 114
Hayden Fork 9130 8.0 7.1 113 27.1 24.5 111
Kelley R.S. 8180 8.7 9.2 95 18.3 20.7 88
Lily Lake 9133 7.8 7.8 100 19.4 20.2 96
Monte Cristo 8932 30.2 23.3 130 36.1 30.1 120
Salt River Summit 7640 6.8 6.2 110 18.8 18.8 100
Spring Creek Divide 9000 23.4 24.1 97 26.5 26.8 99
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Basin Index (%) 110 107
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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.