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: APRIL 15 , 2020
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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 16.7 13.2 127 19.5 21.3 92
Black Bear 8170 33.2 36.6 91 33.7 39.0 86
Blind Bull Sum 8650 27.3 23.8 115 16.5 19.8 83
Cottonwood Creek 7670 25.5 19.8 129 30.1 25.2 119
East Rim Divide 7930 11.2 10.0 112 10.5 11.9 88
Grand Targhee 9260 45.1 41.0 110 29.5 32.0 92
Granite Creek 6770 18.0 12.3 146 18.7 19.9 94
Grassy Lake 7265 34.0 31.5 108 35.2 36.6 96
Gros Ventre Summit 8750 13.1 13.0 101 13.3 13.3 100
Gunsight Pass 9820 14.0 13.4 104 14.1 14.3 99
Lewis Lake Divide 7850 28.9 30.2 96 32.7 36.1 91
Phillips Bench 8200 -M 26.0 * -M 28.6 *
Salt River Summit 7640 15.3 11.2 137 16.4 17.0 96
Snake River Station 6920 17.3 12.8 135 22.6 22.9 99
Spring Creek Divide 9000 27.3 23.2 118 25.6 24.3 105
Thumb Divide 7980 17.9 14.4 124 17.7 19.0 93
Togwotee Pass 9580 28.8 23.0 125 28.2 24.9 113
Two Ocean Plateau 9240 33.5 27.2 123 27.4 27.9 98
Willow Creek 8080 38.8 26.7 145 37.2 34.4 108
Younts Peak 8350 18.5 14.7 126 15.4 16.2 95
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Basin Index (%) 117 97
MADISON-GALLATIN
Black Bear 8170 33.2 36.6 91 33.7 39.0 86
Canyon 7870 15.6 12.4 126 16.1 16.6 97
Madison Plateau 7750 23.1 22.5 103 20.6 26.8 77
West Yellowstone 6700 -M 8.2 * -M 14.4 *
Whiskey Creek 6800 16.0 14.8 108 18.4 20.6 89
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Basin Index (%) 102 86
YELLOWSTONE
Beartooth Lake 9360 24.9 22.4 111 23.0 20.3 113
Burnt Mtn 5880 8.9 .2 4450* 15.8 13.5 117
Canyon 7870 15.6 12.4 126 16.1 16.6 97
Cole Creek 7850 19.0 15.6 122 14.6 14.0 104
Evening Star 9200 29.5 24.7 119 31.6 28.1 112
Fisher Creek 9100 34.4 31.9 108 35.1 32.6 108
Northeast Entrance 7350 10.1 8.0 126 13.4 12.6 106
Parker Peak 9400 -M 20.5 * -M 18.2 *
Sylvan Lake 8420 23.2 20.0 116 25.4 22.9 111
Thumb Divide 7980 17.9 14.4 124 17.7 19.0 93
Two Ocean Plateau 9240 33.5 27.2 123 27.4 27.9 98
White Mill 8700 28.1 23.5 120 23.2 24.4 95
Wolverine 7650 12.7 8.6 148 14.0 12.6 111
Younts Peak 8350 18.5 14.7 126 15.4 16.2 95
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Basin Index (%) 124 105
WIND RIVER
Burroughs Creek 8750 14.1 -M * 14.9 -M *
Castle Creek 8400 5.9 -M * 7.8 -M *
Cold Springs 9630 7.5 5.8 129 8.0 10.4 77
Deer Park 9700 15.0 16.0 94 14.5 20.7 70
Hobbs Park 10100 14.6 14.9 98 13.0 14.2 92
Kirwin 9550 12.1 9.9 122 11.7 12.0 98
Little Warm 9370 13.0 10.2 127 10.4 13.4 78
Owl Creek 8975 6.8 5.1 133 8.0 6.4 125
South Pass 9040 12.6 15.8 80 12.1 18.0 67
St. Lawrence Alt 8620 4.8 6.4 75 8.0 9.4 85
Togwotee Pass 9580 28.8 23.0 125 28.2 24.9 113
Townsend Creek 8700 9.9 10.0 99 10.7 12.8 84
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Basin Index (%) 107 88
BIGHORN BASIN
Bald Mtn. 9380 21.4 19.4 110 16.5 17.7 93
Bear Trap Meadow 8200 8.2 4.4 186 9.9 9.1 109
Bone Springs Div 9350 18.8 16.8 112 15.3 16.2 94
Grave Springs 8550 10.0 9.6 104 10.6 11.2 95
Kirwin 9550 12.1 9.9 122 11.7 12.0 98
Marquette 8760 8.0 -M * 9.6 -M *
Middle Powder 7760 13.1 12.4 106 12.4 12.3 101
Owl Creek 8975 6.8 5.1 133 8.0 6.4 125
Powder River Pass 9480 12.7 10.2 125 13.2 13.2 100
Shell Creek 9580 15.9 15.5 103 14.7 14.3 103
Timber Creek 7950 6.1 5.2 117 7.7 7.9 97
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Basin Index (%) 115 100
SHOSHONE RIVER
Blackwater 9780 24.7 23.7 104 24.6 21.3 115
Evening Star 9200 29.5 24.7 119 31.6 28.1 112
Marquette 8760 8.0 -M * 9.6 -M *
Sylvan Lake 8420 23.2 20.0 116 25.4 22.9 111
Sylvan Road 7120 11.4 10.3 111 -M 17.1 *
Younts Peak 8350 18.5 14.7 126 15.4 16.2 95
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Basin Index (%) 115 110
POWDER RIVER
Bear Trap Meadow 8200 8.2 4.4 186 9.9 9.1 109
Cloud Peak Reservoir 9860 15.5 15.4 101 14.5 14.2 102
Grave Springs 8550 10.0 9.6 104 10.6 11.2 95
Hansen Sawmill 8360 7.8 5.9 132 9.6 9.1 105
Middle Powder 7760 13.1 12.4 106 12.4 12.3 101
Powder River Pass 9480 12.7 10.2 125 13.2 13.2 100
Soldier Park 8720 7.6 -M * 9.7 -M *
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Basin Index (%) 116 102
TONGUE RIVER
Big Goose 7990 9.5 9.7 98 10.9 12.1 90
Bone Springs Div 9350 18.8 16.8 112 15.3 16.2 94
Burgess Junction 7880 11.7 12.1 97 13.0 13.0 100
Dome Lake 8880 14.5 12.0 121 10.8 14.3 76
Little Goose 8870 11.9 -M * 9.1 -M *
Sucker Creek 8880 14.0 12.6 111 13.9 15.1 92
Tie Creek 6870 8.0 4.8 167 13.6 12.3 111
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Basin Index (%) 112 93
BELLE FOURCHE
Blind Park 6890 3.7 5.1 73 8.7 12.4 70
Cole Canyon 5910 -M 3.2 * -M 10.0 *
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Basin Index (%) 73 70
CHEYENNE RIVER BASIN
Blind Park 6890 3.7 5.1 73 8.7 12.4 70
North Rapid Creek 6130 6.0 5.5 109 9.0 10.4 87
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Basin Index (%) 92 78
UPPER N. PLATTE
Arapaho Ridge 10960 23.0 21.6 106 22.8 23.7 96
Blackhall Mtn 9820 31.2 -M * 30.1 -M *
Columbine 9160 27.5 21.8 126 29.4 26.4 111
Divide Peak 8880 20.5 20.0 102 21.8 22.2 98
Joe Wright 10120 21.7 22.1 98 27.8 26.9 103
Laprele Creek 8375 11.8 9.0 131 13.3 13.2 101
Med Bow 10500 43.2 -M * 36.1 -M *
Never Summer 10280 20.9 20.5 102 15.9 -M *
North French Creek 10130 33.4 31.8 105 32.4 27.8 117
Old Battle 10000 32.6 32.2 101 30.3 36.1 84
Rawah 9020 10.0 9.6 104 14.8 15.0 99
Sage Creek Basin 7850 11.7 8.8 133 12.5 15.0 83
Sand Lake 10050 30.5 30.4 100 27.8 25.9 107
South Brush Creek 8440 10.2 10.9 94 13.3 15.9 84
Tower 10500 47.5 47.4 100 43.4 41.1 106
Webber Springs 9250 21.9 23.3 94 25.7 27.7 93
Whiskey Park 8950 32.3 27.0 120 31.8 28.8 110
Willow Creek Pass 9540 14.4 12.7 113 13.5 14.0 96
Zirkel 9340 -M 23.9 * -M 29.2 *
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Basin Index (%) 106 100
SWEETWATER
Deer Park 9700 15.0 16.0 94 14.5 20.7 70
Larsen Creek 9000 6.8 10.8 63 9.9 -M *
South Pass 9040 12.6 15.8 80 12.1 18.0 67
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Basin Index (%) 81 69
LOWER N. PLATTE
Casper Mtn. 7900 16.3 14.4 113 12.1 16.0 76
Laprele Creek 8375 11.8 9.0 131 13.3 13.2 101
Reno Hill 8400 17.5 14.1 124 17.6 16.5 107
Windy Peak 7900 9.3 7.4 126 9.2 11.2 82
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Basin Index (%) 122 92
LARAMIE RIVER
Brooklyn Lake 10240 27.9 22.2 126 27.1 22.1 123
Cinnabar Park 9574 23.0 21.0 110 25.7 24.9 103
Crow Creek 8330 6.5 4.1 159 11.3 11.5 98
Deadman Hill 10220 19.7 16.5 119 17.7 18.2 97
Rawah 9020 10.0 9.6 104 14.8 15.0 99
Roach 9700 14.9 16.5 90 16.2 20.0 81
Windy Peak 7900 9.3 7.4 126 9.2 11.2 82
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Basin Index (%) 114 99
S. PLATTE
Black Mountain 8920 10.4 -M * 13.8 -M *
Crow Creek 8330 6.5 4.1 159 11.3 11.5 98
Deadman Hill 10220 19.7 16.5 119 17.7 18.2 97
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Basin Index (%) 127 98
LITTLE SNAKE RIVER
Battle Mountain 7440 8.3 6.7 124 14.5 15.6 93
Divide Peak 8880 20.5 20.0 102 21.8 22.2 98
Elk River 8700 18.6 17.2 108 18.4 20.7 89
Little Snake River 8915 26.8 25.8 104 33.0 30.7 107
Old Battle 10000 32.6 32.2 101 30.3 36.1 84
Sage Creek Basin 7850 11.7 8.8 133 12.5 15.0 83
Sandstone RS 8150 14.0 11.8 119 16.1 19.0 85
Whiskey Park 8950 32.3 27.0 120 31.8 28.8 110
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Basin Index (%) 110 95
UPPER GREEN RIVER
Big Sandy Opening 9080 10.6 12.9 82 9.6 13.7 70
Blind Bull Sum 8650 27.3 23.8 115 16.5 19.8 83
East Rim Divide 7930 11.2 10.0 112 10.5 11.9 88
Elkhart Park G.S. 9400 10.7 12.0 89 10.7 13.7 78
Gros Ventre Summit 8750 13.1 13.0 101 13.3 13.3 100
Gunsight Pass 9820 14.0 13.4 104 14.1 14.3 99
Indian Creek 9425 24.0 23.9 100 17.0 23.1 74
Kendall R.S. 7740 10.3 9.8 105 11.7 14.4 81
Loomis Park 8240 14.8 13.6 109 19.3 17.6 110
New Fork Lake 8340 10.4 9.6 108 9.6 11.0 87
Pocket Creek 9360 -M -M * 8.8 -M *
Snider Basin 8060 11.8 11.6 102 14.3 14.5 99
Spring Creek Divide 9000 27.3 23.2 118 25.6 24.3 105
Triple Peak 8500 28.1 19.7 143 27.2 25.7 106
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Basin Index (%) 109 92
LOWER GREEN RIVER
Blacks Fork Jct 8869 7.4 -M * 12.3 -M *
Buck Pasture 9632 18.4 -M * 18.1 -M *
EF Blacks Fork GS 9360 14.2 -M * 12.3 -M *
Hams Fork 7840 10.7 8.6 124 12.0 11.7 103
Hewinta 9500 11.2 9.7 115 15.0 14.5 103
Hickerson Park 9122 10.3 6.6 156 12.1 10.7 113
Hole-in-Rock 9168 10.0 6.8 147 11.8 10.2 116
Indian Creek 9425 24.0 23.9 100 17.0 23.1 74
Kelley R.S. 8180 15.3 13.7 112 16.8 18.5 91
Spirit Lk 10235 17.8 -M * 19.0 -M *
Steel Creek Park 10158 17.7 16.1 110 18.4 17.2 107
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Basin Index (%) 116 97
UPPER BEAR RIVER
Bear River RS 8777 8.6 -M * 11.9 -M *
Bug Lake 7987 18.7 19.0 98 18.9 19.9 95
Burts Miller Ranch 8000 2.3 -M * 7.3 -M *
Chalk Creek #1 9171 -M 24.9 * -M 26.1 *
Hayden Fork 9130 15.7 13.9 113 21.1 21.8 97
Kelley R.S. 8180 15.3 13.7 112 16.8 18.5 91
Lily Lake 9133 12.2 12.4 98 13.4 17.8 75
Monte Cristo 8932 28.7 27.8 103 26.9 26.8 100
Salt River Summit 7640 15.3 11.2 137 16.4 17.0 96
Spring Creek Divide 9000 27.3 23.2 118 25.6 24.3 105
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Basin Index (%) 110 95
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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.