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 8 , 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 17.9 15.2 118 19.2 20.7 93
Black Bear 8170 36.2 37.1 98 33.1 37.9 87
Blind Bull Sum 8650 26.6 23.3 114 16.2 19.3 84
Cottonwood Creek 7670 25.8 20.9 123 29.5 24.4 121
East Rim Divide 7930 12.5 10.2 123 10.1 11.7 86
Grand Targhee 9260 43.8 38.7 113 29.1 30.7 95
Granite Creek 6770 18.5 14.3 129 -M 19.5 *
Grassy Lake 7265 34.6 31.4 110 34.7 35.6 97
Gros Ventre Summit 8750 13.1 12.9 102 12.7 12.8 99
Gunsight Pass 9820 14.0 13.9 101 13.7 13.8 99
Lewis Lake Divide 7850 28.7 30.0 96 32.1 35.1 91
Phillips Bench 8200 -M 25.5 * -M 27.9 *
Salt River Summit 7640 15.7 12.7 124 16.3 16.5 99
Snake River Station 6920 18.7 14.8 126 22.4 22.2 101
Spring Creek Divide 9000 27.1 22.5 120 25.3 23.6 107
Thumb Divide 7980 18.3 14.7 124 17.6 18.4 96
Togwotee Pass 9580 28.4 22.2 128 27.3 24.1 113
Two Ocean Plateau 9240 32.8 26.2 125 24.8 26.9 92
Willow Creek 8080 38.7 28.4 136 36.1 33.3 108
Younts Peak 8350 18.7 14.4 130 14.9 15.6 96
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Basin Index (%) 116 98
MADISON-GALLATIN
Black Bear 8170 36.2 37.1 98 33.1 37.9 87
Canyon 7870 15.5 12.4 125 15.8 16.1 98
Madison Plateau 7750 23.1 21.6 107 20.4 26.1 78
West Yellowstone 6700 -M 9.3 * -M 14.1 *
Whiskey Creek 6800 16.4 14.8 111 18.3 20.0 92
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Basin Index (%) 106 88
YELLOWSTONE
Beartooth Lake 9360 24.1 21.4 113 22.4 19.5 115
Burnt Mtn 5880 8.3 4.3 193 14.7 12.9 114
Canyon 7870 15.5 12.4 125 15.8 16.1 98
Cole Creek 7850 17.6 14.8 119 13.6 12.9 105
Evening Star 9200 28.6 23.8 120 30.8 27.1 114
Fisher Creek 9100 33.8 31.3 108 34.6 31.3 111
Northeast Entrance 7350 11.1 8.9 125 13.0 12.1 107
Parker Peak 9400 -M 19.6 * -M 17.5 *
Sylvan Lake 8420 23.1 19.4 119 24.8 22.0 113
Thumb Divide 7980 18.3 14.7 124 17.6 18.4 96
Two Ocean Plateau 9240 32.8 26.2 125 24.8 26.9 92
White Mill 8700 27.5 22.3 123 23.0 23.4 98
Wolverine 7650 13.2 9.6 138 13.6 12.1 112
Younts Peak 8350 18.7 14.4 130 14.9 15.6 96
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Basin Index (%) 122 105
WIND RIVER
Burroughs Creek 8750 14.1 -M * 14.4 -M *
Castle Creek 8400 5.7 -M * 7.0 -M *
Cold Springs 9630 7.9 6.6 120 7.4 9.9 75
Deer Park 9700 14.7 15.8 93 13.5 19.9 68
Hobbs Park 10100 14.4 14.2 101 12.3 13.5 91
Kirwin 9550 12.5 9.6 130 11.1 11.5 97
Little Warm 9370 13.1 10.3 127 10.6 12.8 83
Owl Creek 8975 6.6 5.8 114 7.2 6.0 120
South Pass 9040 12.6 15.3 82 11.3 17.3 65
St. Lawrence Alt 8620 5.9 6.9 86 7.5 9.0 83
Togwotee Pass 9580 28.4 22.2 128 27.3 24.1 113
Townsend Creek 8700 9.8 9.7 101 9.9 12.0 82
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Basin Index (%) 108 87
BIGHORN BASIN
Bald Mtn. 9380 20.7 19.2 108 16.5 16.8 98
Bear Trap Meadow 8200 8.7 4.9 178 9.6 8.6 112
Bone Springs Div 9350 17.8 16.9 105 14.7 15.5 95
Grave Springs 8550 9.6 9.5 101 10.3 10.7 96
Kirwin 9550 12.5 9.6 130 11.1 11.5 97
Marquette 8760 7.3 -M * 9.1 -M *
Middle Powder 7760 12.4 12.1 102 11.8 11.7 101
Owl Creek 8975 6.6 5.8 114 7.2 6.0 120
Powder River Pass 9480 12.2 10.2 120 12.5 12.6 99
Shell Creek 9580 14.9 15.2 98 14.1 13.7 103
Timber Creek 7950 6.1 5.0 122 7.1 7.3 97
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Basin Index (%) 112 100
SHOSHONE RIVER
Blackwater 9780 24.0 22.7 106 24.0 20.3 118
Evening Star 9200 28.6 23.8 120 30.8 27.1 114
Marquette 8760 7.3 -M * 9.1 -M *
Sylvan Lake 8420 23.1 19.4 119 24.8 22.0 113
Sylvan Road 7120 13.1 10.7 122 -M 16.5 *
Younts Peak 8350 18.7 14.4 130 14.9 15.6 96
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Basin Index (%) 118 111
POWDER RIVER
Bear Trap Meadow 8200 8.7 4.9 178 9.6 8.6 112
Cloud Peak Reservoir 9860 14.4 14.9 97 13.7 13.4 102
Grave Springs 8550 9.6 9.5 101 10.3 10.7 96
Hansen Sawmill 8360 7.6 6.1 125 8.8 8.6 102
Middle Powder 7760 12.4 12.1 102 11.8 11.7 101
Powder River Pass 9480 12.2 10.2 120 12.5 12.6 99
Soldier Park 8720 7.1 -M * 8.9 -M *
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Basin Index (%) 112 102
TONGUE RIVER
Big Goose 7990 8.8 9.7 91 9.6 11.5 83
Bone Springs Div 9350 17.8 16.9 105 14.7 15.5 95
Burgess Junction 7880 11.4 12.0 95 12.6 12.3 102
Dome Lake 8880 13.7 11.8 116 9.8 13.6 72
Little Goose 8870 10.9 -M * 8.3 -M *
Sucker Creek 8880 13.1 12.3 107 12.9 14.4 90
Tie Creek 6870 8.0 5.6 143 12.8 11.7 109
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Basin Index (%) 107 92
BELLE FOURCHE
Blind Park 6890 4.7 6.9 68 8.3 11.9 70
Cole Canyon 5910 -M 4.9 * -M 9.6 *
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Basin Index (%) 68 70
CHEYENNE RIVER BASIN
Blind Park 6890 4.7 6.9 68 8.3 11.9 70
North Rapid Creek 6130 6.3 6.4 98 8.3 10.0 83
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Basin Index (%) 83 76
UPPER N. PLATTE
Arapaho Ridge 10960 23.0 21.0 110 22.1 22.6 98
Blackhall Mtn 9820 30.7 -M * 29.2 -M *
Columbine 9160 29.7 23.4 127 28.3 25.5 111
Divide Peak 8880 21.4 20.0 107 21.9 21.4 102
Joe Wright 10120 -M 21.4 * -M 25.8 *
Laprele Creek 8375 12.3 9.4 131 13.2 12.5 106
Med Bow 10500 43.7 -M * 35.3 -M *
Never Summer 10280 -M 20.4 * -M -M *
North French Creek 10130 33.9 29.7 114 32.0 26.7 120
Old Battle 10000 32.2 31.5 102 30.3 34.9 87
Rawah 9020 11.0 10.6 104 14.4 14.4 100
Sage Creek Basin 7850 14.0 11.6 121 12.5 14.6 86
Sand Lake 10050 30.0 29.1 103 27.2 24.8 110
South Brush Creek 8440 11.6 11.8 98 13.2 15.2 87
Tower 10500 46.1 46.0 100 41.7 39.8 105
Webber Springs 9250 23.1 23.1 100 25.2 26.7 94
Whiskey Park 8950 33.0 27.5 120 31.5 27.9 113
Willow Creek Pass 9540 13.7 12.2 112 12.9 13.4 96
Zirkel 9340 28.3 26.2 108 -M 28.5 *
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Basin Index (%) 109 102
SWEETWATER
Deer Park 9700 14.7 15.8 93 13.5 19.9 68
Larsen Creek 9000 -M 11.5 * -M -M *
South Pass 9040 12.6 15.3 82 11.3 17.3 65
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Basin Index (%) 88 67
LOWER N. PLATTE
Casper Mtn. 7900 16.1 14.4 112 11.9 15.1 79
Laprele Creek 8375 12.3 9.4 131 13.2 12.5 106
Reno Hill 8400 17.0 14.0 121 17.5 15.6 112
Windy Peak 7900 9.7 7.7 126 9.2 10.6 87
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Basin Index (%) 121 96
LARAMIE RIVER
Brooklyn Lake 10240 27.6 22.0 125 26.4 21.1 125
Cinnabar Park 9574 22.4 21.3 105 25.3 24.1 105
Crow Creek 8330 7.2 6.9 104 10.7 10.9 98
Deadman Hill 10220 18.9 16.2 117 16.5 17.3 95
Rawah 9020 11.0 10.6 104 14.4 14.4 100
Roach 9700 15.0 16.6 90 16.1 19.1 84
Windy Peak 7900 9.7 7.7 126 9.2 10.6 87
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Basin Index (%) 110 101
S. PLATTE
Black Mountain 8920 9.6 -M * 13.1 -M *
Crow Creek 8330 7.2 6.9 104 10.7 10.9 98
Deadman Hill 10220 18.9 16.2 117 16.5 17.3 95
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Basin Index (%) 113 96
LITTLE SNAKE RIVER
Battle Mountain 7440 10.4 9.3 112 14.5 15.0 97
Divide Peak 8880 21.4 20.0 107 21.9 21.4 102
Elk River 8700 19.6 19.1 103 18.1 20.0 90
Little Snake River 8915 28.0 25.5 110 32.6 29.9 109
Old Battle 10000 32.2 31.5 102 30.3 34.9 87
Sage Creek Basin 7850 14.0 11.6 121 12.5 14.6 86
Sandstone RS 8150 15.6 12.8 122 16.2 18.3 89
Whiskey Park 8950 33.0 27.5 120 31.5 27.9 113
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Basin Index (%) 111 98
UPPER GREEN RIVER
Big Sandy Opening 9080 10.5 12.7 83 9.2 13.2 70
Blind Bull Sum 8650 26.6 23.3 114 16.2 19.3 84
East Rim Divide 7930 12.5 10.2 123 10.1 11.7 86
Elkhart Park G.S. 9400 10.8 12.3 88 10.5 13.2 80
Gros Ventre Summit 8750 13.1 12.9 102 12.7 12.8 99
Gunsight Pass 9820 14.0 13.9 101 13.7 13.8 99
Indian Creek 9425 23.9 24.7 97 16.8 22.4 75
Kendall R.S. 7740 10.9 11.4 96 11.4 14.1 81
Loomis Park 8240 15.3 13.8 111 18.4 17.2 107
New Fork Lake 8340 10.7 10.3 104 9.2 10.7 86
Pocket Creek 9360 -M -M * 8.6 -M *
Snider Basin 8060 13.4 12.3 109 14.2 14.1 101
Spring Creek Divide 9000 27.1 22.5 120 25.3 23.6 107
Triple Peak 8500 27.8 21.8 128 26.8 25.1 107
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Basin Index (%) 107 92
LOWER GREEN RIVER
Blacks Fork Jct 8869 8.4 -M * 12.1 -M *
Buck Pasture 9632 18.7 -M * 17.5 -M *
EF Blacks Fork GS 9360 14.4 -M * 12.0 -M *
Hams Fork 7840 12.1 10.5 115 11.7 11.3 104
Hewinta 9500 12.3 10.9 113 14.7 14.0 105
Hickerson Park 9122 11.2 7.9 142 11.8 10.2 116
Hole-in-Rock 9168 10.1 7.0 144 11.6 9.7 120
Indian Creek 9425 23.9 24.7 97 16.8 22.4 75
Kelley R.S. 8180 16.0 14.6 110 16.7 18.0 93
Spirit Lk 10235 18.3 -M * 18.6 -M *
Steel Creek Park 10158 17.6 15.8 111 18.1 16.5 110
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Basin Index (%) 113 99
UPPER BEAR RIVER
Bear River RS 8777 10.5 -M * 11.8 -M *
Bug Lake 7987 19.8 18.5 107 18.8 19.3 97
Burts Miller Ranch 8000 5.7 -M * 7.3 -M *
Chalk Creek #1 9171 21.1 24.4 86 19.4 25.1 77
Hayden Fork 9130 16.7 15.3 109 20.7 21.1 98
Kelley R.S. 8180 16.0 14.6 110 16.7 18.0 93
Lily Lake 9133 12.6 12.7 99 13.1 17.1 77
Monte Cristo 8932 30.3 27.8 109 26.6 25.9 103
Salt River Summit 7640 15.7 12.7 124 16.3 16.5 99
Spring Creek Divide 9000 27.1 22.5 120 25.3 23.6 107
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Basin Index (%) 107 94
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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.