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 22 , 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 15.5 11.5 135 20.1 21.9 92
Black Bear 8170 -M 36.9 * 33.9 40.2 84
Blind Bull Sum 8650 28.7 24.2 119 17.3 20.4 85
Cottonwood Creek 7670 25.1 18.1 139 31.1 26.1 119
East Rim Divide 7930 10.5 9.4 112 11.3 12.3 92
Grand Targhee 9260 46.2 42.5 109 -M 32.9 *
Granite Creek 6770 18.3 10.3 178 18.1 20.4 89
Grassy Lake 7265 33.5 30.8 109 35.4 37.7 94
Gros Ventre Summit 8750 13.3 13.0 102 14.0 13.8 101
Gunsight Pass 9820 14.3 13.7 104 14.6 15.0 97
Lewis Lake Divide 7850 28.6 30.6 93 33.2 37.1 89
Phillips Bench 8200 -M 25.3 * -M 29.4 *
Salt River Summit 7640 14.6 9.2 159 17.1 17.5 98
Snake River Station 6920 15.8 11.1 142 22.8 23.7 96
Spring Creek Divide 9000 28.2 23.6 119 26.5 25.0 106
Thumb Divide 7980 17.4 14.4 121 17.9 19.8 90
Togwotee Pass 9580 29.4 24.2 121 29.0 25.9 112
Two Ocean Plateau 9240 34.1 28.5 120 27.8 28.8 97
Willow Creek 8080 39.9 26.6 150 38.5 35.6 108
Younts Peak 8350 18.4 15.2 121 15.8 16.8 94
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Basin Index (%) 121 97
MADISON-GALLATIN
Black Bear 8170 -M 36.9 * 33.9 40.2 84
Canyon 7870 15.1 12.1 125 16.1 17.2 94
Madison Plateau 7750 22.7 22.9 99 20.6 27.7 74
West Yellowstone 6700 7.0 6.5 108 9.6 15.2 63
Whiskey Creek 6800 15.8 15.4 103 18.4 21.4 86
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Basin Index (%) 107 81
YELLOWSTONE
Beartooth Lake 9360 25.0 23.6 106 23.5 20.9 112
Burnt Mtn 5880 8.6 .0 * 16.5 14.5 114
Canyon 7870 15.1 12.1 125 16.1 17.2 94
Cole Creek 7850 20.5 16.4 125 15.9 14.8 107
Evening Star 9200 29.3 24.6 119 32.3 29.0 111
Fisher Creek 9100 35.1 32.8 107 35.5 33.7 105
Northeast Entrance 7350 9.2 6.0 153 13.4 13.1 102
Parker Peak 9400 29.2 21.2 138 25.7 18.9 136
Sylvan Lake 8420 22.5 20.4 110 25.7 23.8 108
Thumb Divide 7980 17.4 14.4 121 17.9 19.8 90
Two Ocean Plateau 9240 34.1 28.5 120 27.8 28.8 97
White Mill 8700 28.1 23.7 119 23.6 25.1 94
Wolverine 7650 12.7 6.6 192 14.2 13.0 109
Younts Peak 8350 18.4 15.2 121 15.8 16.8 94
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Basin Index (%) 124 105
WIND RIVER
Burroughs Creek 8750 14.3 -M * 15.1 -M *
Castle Creek 8400 4.6 -M * 8.1 -M *
Cold Springs 9630 7.8 4.1 190 9.1 11.1 82
Deer Park 9700 15.2 16.3 93 15.9 21.8 73
Hobbs Park 10100 15.5 15.1 103 14.5 15.1 96
Kirwin 9550 12.9 10.0 129 12.2 12.7 96
Little Warm 9370 12.9 10.0 129 11.3 14.0 81
Owl Creek 8975 6.2 3.5 177 8.6 7.0 123
South Pass 9040 13.2 15.4 86 13.4 18.8 71
St. Lawrence Alt 8620 5.1 5.1 100 9.1 10.1 90
Togwotee Pass 9580 29.4 24.2 121 29.0 25.9 112
Townsend Creek 8700 11.1 9.1 122 12.4 13.5 92
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Basin Index (%) 115 90
BIGHORN BASIN
Bald Mtn. 9380 22.7 20.0 114 18.1 18.4 98
Bear Trap Meadow 8200 7.8 2.7 289 10.5 9.6 109
Bone Springs Div 9350 18.2 16.2 112 16.2 17.0 95
Grave Springs 8550 10.0 9.4 106 10.9 11.9 92
Kirwin 9550 12.9 10.0 129 12.2 12.7 96
Marquette 8760 9.4 -M * 10.7 -M *
Middle Powder 7760 13.0 12.4 105 12.6 13.0 97
Owl Creek 8975 6.2 3.5 177 8.6 7.0 123
Powder River Pass 9480 12.5 10.2 123 14.2 13.9 102
Shell Creek 9580 16.5 15.6 106 15.4 15.0 103
Timber Creek 7950 5.5 4.4 125 8.4 8.6 98
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Basin Index (%) 120 100
SHOSHONE RIVER
Blackwater 9780 25.4 24.0 106 25.5 22.0 116
Evening Star 9200 29.3 24.6 119 32.3 29.0 111
Marquette 8760 9.4 -M * 10.7 -M *
Sylvan Lake 8420 22.5 20.4 110 25.7 23.8 108
Sylvan Road 7120 8.6 9.2 93 17.8 17.8 100
Younts Peak 8350 18.4 15.2 121 15.8 16.8 94
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Basin Index (%) 112 107
POWDER RIVER
Bear Trap Meadow 8200 7.8 2.7 289 10.5 9.6 109
Cloud Peak Reservoir 9860 15.7 16.0 98 15.2 15.2 100
Grave Springs 8550 10.0 9.4 106 10.9 11.9 92
Hansen Sawmill 8360 7.9 4.5 176 10.2 9.8 104
Middle Powder 7760 13.0 12.4 105 12.6 13.0 97
Powder River Pass 9480 12.5 10.2 123 14.2 13.9 102
Soldier Park 8720 7.5 -M * 10.2 -M *
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Basin Index (%) 121 100
TONGUE RIVER
Big Goose 7990 10.0 9.2 109 11.0 12.9 85
Bone Springs Div 9350 18.2 16.2 112 16.2 17.0 95
Burgess Junction 7880 12.5 12.7 98 13.6 13.7 99
Dome Lake 8880 14.4 11.8 122 11.4 15.1 75
Little Goose 8870 12.3 -M * -M -M *
Sucker Creek 8880 14.5 12.7 114 14.8 16.0 92
Tie Creek 6870 7.6 4.1 185 14.0 13.1 107
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Basin Index (%) 116 92
BELLE FOURCHE
Blind Park 6890 3.8 3.9 97 9.3 13.3 70
Cole Canyon 5910 -M 1.6 * -M 10.6 *
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Basin Index (%) 97 70
CHEYENNE RIVER BASIN
Blind Park 6890 3.8 3.9 97 9.3 13.3 70
North Rapid Creek 6130 5.5 3.9 141 9.2 11.3 81
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Basin Index (%) 119 75
UPPER N. PLATTE
Arapaho Ridge 10960 24.0 21.4 112 24.0 24.5 98
Blackhall Mtn 9820 33.0 -M * 31.8 -M *
Columbine 9160 28.6 20.6 139 30.9 27.2 114
Divide Peak 8880 22.6 18.4 123 23.3 23.0 101
Joe Wright 10120 24.0 22.5 107 29.5 28.1 105
Laprele Creek 8375 11.4 7.7 148 13.9 13.9 100
Med Bow 10500 46.1 -M * 38.4 -M *
Never Summer 10280 21.8 20.8 105 16.8 -M *
North French Creek 10130 35.9 32.1 112 34.6 28.9 120
Old Battle 10000 34.2 33.2 103 32.6 37.4 87
Rawah 9020 10.8 8.2 132 16.1 15.7 103
Sage Creek Basin 7850 12.5 4.9 255 13.3 15.3 87
Sand Lake 10050 32.2 30.6 105 29.4 27.1 108
South Brush Creek 8440 11.5 9.7 119 14.3 16.7 86
Tower 10500 46.4 48.5 96 45.6 42.5 107
Webber Springs 9250 23.3 21.8 107 27.6 28.6 97
Whiskey Park 8950 34.2 25.7 133 33.7 29.9 113
Willow Creek Pass 9540 15.3 13.4 114 14.6 14.6 100
Zirkel 9340 -M 22.6 * -M 29.9 *
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Basin Index (%) 114 103
SWEETWATER
Deer Park 9700 15.2 16.3 93 15.9 21.8 73
Larsen Creek 9000 5.4 10.1 53 10.6 -M *
South Pass 9040 13.2 15.4 86 13.4 18.8 71
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Basin Index (%) 81 72
LOWER N. PLATTE
Casper Mtn. 7900 16.2 14.3 113 12.6 16.8 75
Laprele Creek 8375 11.4 7.7 148 13.9 13.9 100
Reno Hill 8400 18.1 14.0 129 18.8 17.4 108
Windy Peak 7900 9.5 6.4 148 9.9 11.8 84
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Basin Index (%) 130 92
LARAMIE RIVER
Brooklyn Lake 10240 30.2 22.4 135 29.6 23.1 128
Cinnabar Park 9574 24.7 19.9 124 28.6 25.7 111
Crow Creek 8330 7.3 .4 1825* 12.8 12.1 106
Deadman Hill 10220 21.5 17.4 124 19.3 19.2 101
Rawah 9020 10.8 8.2 132 16.1 15.7 103
Roach 9700 16.9 16.6 102 18.4 20.9 88
Windy Peak 7900 9.5 6.4 148 9.9 11.8 84
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Basin Index (%) 132 105
S. PLATTE
Black Mountain 8920 11.7 -M * 15.9 -M *
Crow Creek 8330 7.3 .4 1825* 12.8 12.1 106
Deadman Hill 10220 21.5 17.4 124 19.3 19.2 101
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Basin Index (%) 162* 103
LITTLE SNAKE RIVER
Battle Mountain 7440 8.2 3.5 234 15.2 16.2 94
Divide Peak 8880 22.6 18.4 123 23.3 23.0 101
Elk River 8700 19.9 15.0 133 19.5 21.5 91
Little Snake River 8915 28.3 23.8 119 34.7 31.2 111
Old Battle 10000 34.2 33.2 103 32.6 37.4 87
Sage Creek Basin 7850 12.5 4.9 255 13.3 15.3 87
Sandstone RS 8150 14.3 9.8 146 17.5 19.7 89
Whiskey Park 8950 34.2 25.7 133 33.7 29.9 113
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Basin Index (%) 130 98
UPPER GREEN RIVER
Big Sandy Opening 9080 10.9 12.4 88 10.0 14.3 70
Blind Bull Sum 8650 28.7 24.2 119 17.3 20.4 85
East Rim Divide 7930 10.5 9.4 112 11.3 12.3 92
Elkhart Park G.S. 9400 10.9 11.9 92 11.2 14.2 79
Gros Ventre Summit 8750 13.3 13.0 102 14.0 13.8 101
Gunsight Pass 9820 14.3 13.7 104 14.6 15.0 97
Indian Creek 9425 24.8 23.5 106 17.8 23.8 75
Kendall R.S. 7740 9.9 7.7 129 12.8 14.8 86
Loomis Park 8240 15.3 12.5 122 20.1 18.1 111
New Fork Lake 8340 9.6 8.3 116 10.0 11.4 88
Pocket Creek 9360 -M -M * 9.4 -M *
Snider Basin 8060 11.0 10.5 105 15.0 14.9 101
Spring Creek Divide 9000 28.2 23.6 119 26.5 25.0 106
Triple Peak 8500 29.3 19.2 153 28.5 26.6 107
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Basin Index (%) 114 93
LOWER GREEN RIVER
Blacks Fork Jct 8869 8.1 -M * 13.3 -M *
Buck Pasture 9632 18.4 -M * 19.1 -M *
EF Blacks Fork GS 9360 14.4 -M * 13.4 -M *
Hams Fork 7840 9.0 6.0 150 12.3 12.2 101
Hewinta 9500 13.4 7.6 176 16.1 15.2 106
Hickerson Park 9122 9.8 5.2 188 12.4 11.2 111
Hole-in-Rock 9168 10.2 5.6 182 12.4 10.7 116
Indian Creek 9425 24.8 23.5 106 17.8 23.8 75
Kelley R.S. 8180 15.5 12.2 127 17.3 19.1 91
Spirit Lk 10235 17.7 -M * 19.3 -M *
Steel Creek Park 10158 18.8 16.3 115 19.9 18.0 111
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Basin Index (%) 133 98
UPPER BEAR RIVER
Bear River RS 8777 7.2 -M * 12.6 -M *
Bug Lake 7987 18.9 16.6 114 19.6 20.6 95
Burts Miller Ranch 8000 .3 -M * 7.8 -M *
Chalk Creek #1 9171 21.7 24.5 89 20.7 27.1 76
Hayden Fork 9130 15.8 11.2 141 22.2 22.6 98
Kelley R.S. 8180 15.5 12.2 127 17.3 19.1 91
Lily Lake 9133 12.4 10.2 122 14.0 18.5 76
Monte Cristo 8932 29.6 27.3 108 27.5 27.7 99
Salt River Summit 7640 14.6 9.2 159 17.1 17.5 98
Spring Creek Divide 9000 28.2 23.6 119 26.5 25.0 106
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Basin Index (%) 116 93
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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.