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 FRIDAY: APRIL 10 , 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 17.2 14.9 115 19.2 21.0 91
Black Bear 8170 -M 36.8 * 33.6 38.2 88
Blind Bull Sum 8650 -M 23.5 * -M 19.5 *
Cottonwood Creek 7670 -M 20.8 * -M 24.7 *
East Rim Divide 7930 -M 10.2 * -M 11.8 *
Grand Targhee 9260 44.4 39.3 113 29.4 31.1 95
Granite Creek 6770 -M 13.9 * -M 19.7 *
Grassy Lake 7265 34.4 31.4 110 34.7 35.9 97
Gros Ventre Summit 8750 13.3 12.8 104 12.7 13.0 98
Gunsight Pass 9820 -M 13.9 * -M 14.1 *
Lewis Lake Divide 7850 -M 30.1 * -M 35.4 *
Phillips Bench 8200 -M 25.7 * -M 28.2 *
Salt River Summit 7640 -M 12.5 * -M 16.7 *
Snake River Station 6920 18.2 14.4 126 22.4 22.5 100
Spring Creek Divide 9000 -M 22.7 * -M 23.8 *
Thumb Divide 7980 18.0 14.7 122 17.5 18.7 94
Togwotee Pass 9580 28.3 22.5 126 27.6 24.4 113
Two Ocean Plateau 9240 32.8 26.4 124 26.7 27.3 98
Willow Creek 8080 -M 28.1 * -M 33.7 *
Younts Peak 8350 17.7 14.5 122 14.9 15.8 94
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Basin Index (%) 117* 96
MADISON-GALLATIN
Black Bear 8170 -M 36.8 * 33.6 38.2 88
Canyon 7870 15.5 12.4 125 15.8 16.2 98
Madison Plateau 7750 23.1 21.9 105 20.3 26.3 77
West Yellowstone 6700 -M 8.9 * -M 14.2 *
Whiskey Creek 6800 16.5 14.7 112 18.3 20.2 91
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Basin Index (%) 112 87
YELLOWSTONE
Beartooth Lake 9360 24.1 21.6 112 22.7 19.8 115
Burnt Mtn 5880 8.1 3.5 231 14.6 13.2 111
Canyon 7870 15.5 12.4 125 15.8 16.2 98
Cole Creek 7850 17.6 15.1 117 13.6 13.2 103
Evening Star 9200 28.6 24.0 119 30.9 27.4 113
Fisher Creek 9100 33.8 31.4 108 34.6 31.7 109
Northeast Entrance 7350 10.8 8.7 124 13.0 12.3 106
Parker Peak 9400 27.5 19.9 138 -M 17.8 *
Sylvan Lake 8420 23.1 19.6 118 24.8 22.3 111
Thumb Divide 7980 18.0 14.7 122 17.5 18.7 94
Two Ocean Plateau 9240 32.8 26.4 124 26.7 27.3 98
White Mill 8700 27.4 22.7 121 23.0 23.7 97
Wolverine 7650 12.6 9.5 133 13.5 12.2 111
Younts Peak 8350 17.7 14.5 122 14.9 15.8 94
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Basin Index (%) 122 105
WIND RIVER
Burroughs Creek 8750 13.6 -M * 14.1 -M *
Castle Creek 8400 5.4 -M * 6.9 -M *
Cold Springs 9630 7.4 6.3 117 7.4 10.1 73
Deer Park 9700 -M 16.1 * -M 20.3 *
Hobbs Park 10100 -M 14.5 * -M 13.7 *
Kirwin 9550 -M 9.7 * 11.1 11.7 95
Little Warm 9370 -M 10.3 * -M 13.0 *
Owl Creek 8975 6.1 5.8 105 7.2 6.2 116
South Pass 9040 -M 15.6 * -M 17.6 *
St. Lawrence Alt 8620 5.3 6.9 77 7.5 9.1 82
Togwotee Pass 9580 28.3 22.5 126 27.6 24.4 113
Townsend Creek 8700 -M 9.8 * -M 12.3 *
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Basin Index (%) 113* 99*
BIGHORN BASIN
Bald Mtn. 9380 20.9 19.3 108 16.5 17.2 96
Bear Trap Meadow 8200 8.3 4.7 177 9.6 8.7 110
Bone Springs Div 9350 17.3 17.0 102 14.7 15.7 94
Grave Springs 8550 9.6 9.5 101 10.2 10.8 94
Kirwin 9550 -M 9.7 * 11.1 11.7 95
Marquette 8760 7.2 -M * 9.1 -M *
Middle Powder 7760 12.3 12.3 100 11.8 11.9 99
Owl Creek 8975 6.1 5.8 105 7.2 6.2 116
Powder River Pass 9480 12.2 10.3 118 12.5 12.8 98
Shell Creek 9580 15.0 15.4 97 14.1 13.9 101
Timber Creek 7950 5.9 5.1 116 7.1 7.5 95
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Basin Index (%) 108 99
SHOSHONE RIVER
Blackwater 9780 23.9 23.0 104 24.3 20.6 118
Evening Star 9200 28.6 24.0 119 30.9 27.4 113
Marquette 8760 7.2 -M * 9.1 -M *
Sylvan Lake 8420 23.1 19.6 118 24.8 22.3 111
Sylvan Road 7120 12.1 10.5 115 -M 16.7 *
Younts Peak 8350 17.7 14.5 122 14.9 15.8 94
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Basin Index (%) 115 110
POWDER RIVER
Bear Trap Meadow 8200 8.3 4.7 177 9.6 8.7 110
Cloud Peak Reservoir 9860 14.4 15.1 95 13.8 13.6 101
Grave Springs 8550 9.6 9.5 101 10.2 10.8 94
Hansen Sawmill 8360 7.3 6.1 120 8.8 8.7 101
Middle Powder 7760 12.3 12.3 100 11.8 11.9 99
Powder River Pass 9480 12.2 10.3 118 12.5 12.8 98
Soldier Park 8720 7.0 -M * 8.9 -M *
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Basin Index (%) 111 100
TONGUE RIVER
Big Goose 7990 8.8 9.8 90 9.6 11.8 81
Bone Springs Div 9350 17.3 17.0 102 14.7 15.7 94
Burgess Junction 7880 11.4 12.1 94 12.5 12.5 100
Dome Lake 8880 13.5 11.9 113 9.7 13.9 70
Little Goose 8870 10.6 -M * 8.3 -M *
Sucker Creek 8880 13.0 12.4 105 12.9 14.7 88
Tie Creek 6870 7.6 5.5 138 12.7 12.0 106
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Basin Index (%) 104 89
BELLE FOURCHE
Blind Park 6890 4.1 6.6 62 8.3 12.1 69
Cole Canyon 5910 -M 4.5 * -M 9.7 *
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Basin Index (%) 62 69
CHEYENNE RIVER BASIN
Blind Park 6890 4.1 6.6 62 8.3 12.1 69
North Rapid Creek 6130 5.9 6.3 94 8.4 10.1 83
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Basin Index (%) 78 75
UPPER N. PLATTE
Arapaho Ridge 10960 23.9 21.2 113 22.1 22.9 97
Blackhall Mtn 9820 30.3 -M * 29.2 -M *
Columbine 9160 28.3 23.2 122 28.5 25.8 110
Divide Peak 8880 20.9 20.2 103 21.9 21.7 101
Joe Wright 10120 -M 21.7 * -M 26.1 *
Laprele Creek 8375 12.1 9.4 129 13.1 12.7 103
Med Bow 10500 -M -M * -M -M *
Never Summer 10280 20.2 20.4 99 15.2 -M *
North French Creek 10130 33.5 30.3 111 32.0 27.0 119
Old Battle 10000 -M 31.8 * -M 35.3 *
Rawah 9020 10.2 10.5 97 14.4 14.7 98
Sage Creek Basin 7850 -M 11.1 * -M 14.8 *
Sand Lake 10050 29.9 29.6 101 27.2 25.1 108
South Brush Creek 8440 10.7 11.7 91 13.2 15.5 85
Tower 10500 45.6 46.6 98 41.9 40.2 104
Webber Springs 9250 22.3 23.3 96 25.3 27.0 94
Whiskey Park 8950 32.3 27.6 117 31.5 28.2 112
Willow Creek Pass 9540 13.7 12.4 110 12.9 13.6 95
Zirkel 9340 -M 25.8 * -M 28.8 *
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Basin Index (%) 106 103
SWEETWATER
Deer Park 9700 -M 16.1 * -M 20.3 *
Larsen Creek 9000 -M 11.3 * -M -M *
South Pass 9040 -M 15.6 * -M 17.6 *
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Basin Index (%) * *
LOWER N. PLATTE
Casper Mtn. 7900 16.1 14.5 111 11.9 15.3 78
Laprele Creek 8375 12.1 9.4 129 13.1 12.7 103
Reno Hill 8400 16.9 14.1 120 17.5 15.7 111
Windy Peak 7900 9.6 7.6 126 9.2 10.7 86
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Basin Index (%) 120 95
LARAMIE RIVER
Brooklyn Lake 10240 27.6 22.2 124 26.4 21.4 123
Cinnabar Park 9574 22.7 21.4 106 25.3 24.5 103
Crow Creek 8330 6.7 6.6 102 10.7 11.2 96
Deadman Hill 10220 18.8 16.4 115 16.5 17.6 94
Rawah 9020 10.2 10.5 97 14.4 14.7 98
Roach 9700 14.5 16.6 87 16.1 19.4 83
Windy Peak 7900 9.6 7.6 126 9.2 10.7 86
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Basin Index (%) 109 99
S. PLATTE
Black Mountain 8920 9.4 -M * 13.1 -M *
Crow Creek 8330 6.7 6.6 102 10.7 11.2 96
Deadman Hill 10220 18.8 16.4 115 16.5 17.6 94
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Basin Index (%) 111 94
LITTLE SNAKE RIVER
Battle Mountain 7440 9.3 8.7 107 14.6 15.2 96
Divide Peak 8880 20.9 20.2 103 21.9 21.7 101
Elk River 8700 18.2 18.7 97 18.1 20.3 89
Little Snake River 8915 -M 26.0 * -M 30.1 *
Old Battle 10000 -M 31.8 * -M 35.3 *
Sage Creek Basin 7850 -M 11.1 * -M 14.8 *
Sandstone RS 8150 14.1 12.6 112 16.2 18.6 87
Whiskey Park 8950 32.3 27.6 117 31.5 28.2 112
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Basin Index (%) 108 98
UPPER GREEN RIVER
Big Sandy Opening 9080 -M 12.8 * -M 13.4 *
Blind Bull Sum 8650 -M 23.5 * -M 19.5 *
East Rim Divide 7930 -M 10.2 * -M 11.8 *
Elkhart Park G.S. 9400 10.7 12.3 87 10.6 13.4 79
Gros Ventre Summit 8750 13.3 12.8 104 12.7 13.0 98
Gunsight Pass 9820 -M 13.9 * -M 14.1 *
Indian Creek 9425 23.8 24.8 96 16.8 22.6 74
Kendall R.S. 7740 10.4 11.1 94 11.3 14.2 80
Loomis Park 8240 -M 13.8 * -M 17.3 *
New Fork Lake 8340 10.4 10.2 102 -M 10.8 *
Pocket Creek 9360 -M -M * 8.5 -M *
Snider Basin 8060 12.8 12.3 104 14.2 14.2 100
Spring Creek Divide 9000 -M 22.7 * -M 23.8 *
Triple Peak 8500 28.3 21.3 133 26.8 25.3 106
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Basin Index (%) 105 90*
LOWER GREEN RIVER
Blacks Fork Jct 8869 -M -M * -M -M *
Buck Pasture 9632 -M -M * -M -M *
EF Blacks Fork GS 9360 13.7 -M * 12.0 -M *
Hams Fork 7840 10.8 10.0 108 11.7 11.5 102
Hewinta 9500 -M 10.7 * -M 14.3 *
Hickerson Park 9122 10.4 7.8 133 11.8 10.4 113
Hole-in-Rock 9168 10.1 7.1 142 11.6 9.9 117
Indian Creek 9425 23.8 24.8 96 16.8 22.6 74
Kelley R.S. 8180 15.5 14.4 108 16.7 18.2 92
Spirit Lk 10235 17.8 -M * 18.6 -M *
Steel Creek Park 10158 17.4 16.0 109 18.1 16.8 108
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Basin Index (%) 110 97
UPPER BEAR RIVER
Bear River RS 8777 -M -M * -M -M *
Bug Lake 7987 19.2 18.9 102 18.8 19.5 96
Burts Miller Ranch 8000 3.8 -M * 7.3 -M *
Chalk Creek #1 9171 -M 24.6 * -M 25.5 *
Hayden Fork 9130 -M 15.1 * -M 21.3 *
Kelley R.S. 8180 15.5 14.4 108 16.7 18.2 92
Lily Lake 9133 -M 12.8 * -M 17.4 *
Monte Cristo 8932 29.3 27.9 105 26.6 26.2 102
Salt River Summit 7640 -M 12.5 * -M 16.7 *
Spring Creek Divide 9000 -M 22.7 * -M 23.8 *
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Basin Index (%) 105* 97*
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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.