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 SUNDAY: APRIL 5 , 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 17.6 15.2 116 18.3 20.5 89
Black Bear 8170 35.0 37.1 94 32.2 37.4 86
Blind Bull Sum 8650 26.0 23.1 113 15.7 19.2 82
Cottonwood Creek 7670 27.1 21.1 128 29.0 24.2 120
East Rim Divide 7930 12.1 10.2 119 9.8 11.5 85
Grand Targhee 9260 41.9 37.9 111 28.6 30.4 94
Granite Creek 6770 17.3 14.7 118 16.4 19.4 85
Grassy Lake 7265 33.8 31.6 107 33.6 35.3 95
Gros Ventre Summit 8750 12.5 13.0 96 12.1 12.7 95
Gunsight Pass 9820 13.4 13.6 99 13.2 13.5 98
Lewis Lake Divide 7850 27.1 29.7 91 30.7 34.7 88
Phillips Bench 8200 -M 24.9 * -M 27.6 *
Salt River Summit 7640 16.1 12.9 125 16.1 16.4 98
Snake River Station 6920 18.1 15.0 121 21.4 22.0 97
Spring Creek Divide 9000 26.7 22.5 119 24.9 23.4 106
Thumb Divide 7980 17.3 14.7 118 16.5 18.2 91
Togwotee Pass 9580 27.4 21.9 125 26.6 23.8 112
Two Ocean Plateau 9240 31.2 25.8 121 24.4 26.6 92
Willow Creek 8080 38.1 28.3 135 35.6 33.0 108
Younts Peak 8350 17.9 14.3 125 14.2 15.4 92
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Basin Index (%) 113 96
MADISON-GALLATIN
Black Bear 8170 35.0 37.1 94 32.2 37.4 86
Canyon 7870 15.1 12.5 121 15.4 15.9 97
Madison Plateau 7750 22.5 21.4 105 19.8 25.8 77
West Yellowstone 6700 11.9 9.9 120 9.3 13.9 67
Whiskey Creek 6800 15.8 14.9 106 17.8 19.7 90
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Basin Index (%) 105 84
YELLOWSTONE
Beartooth Lake 9360 23.6 21.2 111 22.0 19.3 114
Burnt Mtn 5880 8.9 4.6 193 14.5 12.7 114
Canyon 7870 15.1 12.5 121 15.4 15.9 97
Cole Creek 7850 17.5 14.3 122 13.6 12.6 108
Evening Star 9200 27.9 23.8 117 30.0 26.7 112
Fisher Creek 9100 32.9 30.9 106 33.6 31.0 108
Northeast Entrance 7350 11.0 9.2 120 12.7 11.9 107
Parker Peak 9400 -M 19.2 * -M 17.2 *
Sylvan Lake 8420 22.0 19.3 114 23.7 21.8 109
Thumb Divide 7980 17.3 14.7 118 16.5 18.2 91
Two Ocean Plateau 9240 31.2 25.8 121 24.4 26.6 92
White Mill 8700 26.5 22.0 120 22.1 23.2 95
Wolverine 7650 13.0 9.4 138 13.1 11.9 110
Younts Peak 8350 17.9 14.3 125 14.2 15.4 92
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Basin Index (%) 119 103
WIND RIVER
Burroughs Creek 8750 13.1 -M * 13.8 -M *
Castle Creek 8400 6.2 -M * 7.0 -M *
Cold Springs 9630 7.8 6.9 113 7.2 9.8 73
Deer Park 9700 14.1 15.2 93 12.9 19.4 66
Hobbs Park 10100 13.7 13.9 99 11.8 13.2 89
Kirwin 9550 11.9 9.6 124 10.5 11.3 93
Little Warm 9370 12.6 10.2 124 9.9 12.6 79
Owl Creek 8975 6.8 5.8 117 7.2 5.9 122
South Pass 9040 12.4 15.1 82 10.9 17.1 64
St. Lawrence Alt 8620 5.6 6.8 82 7.3 8.8 83
Togwotee Pass 9580 27.4 21.9 125 26.6 23.8 112
Townsend Creek 8700 9.7 9.4 103 9.8 11.8 83
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Basin Index (%) 106 85
BIGHORN BASIN
Bald Mtn. 9380 20.3 19.0 107 15.7 16.6 95
Bear Trap Meadow 8200 8.9 5.0 178 9.4 8.3 113
Bone Springs Div 9350 17.3 16.6 104 14.3 15.2 94
Grave Springs 8550 10.0 9.2 109 10.3 10.3 100
Kirwin 9550 11.9 9.6 124 10.5 11.3 93
Marquette 8760 7.1 -M * 8.7 -M *
Middle Powder 7760 12.6 11.8 107 11.8 11.4 104
Owl Creek 8975 6.8 5.8 117 7.2 5.9 122
Powder River Pass 9480 12.1 10.1 120 12.3 12.3 100
Shell Creek 9580 14.7 14.8 99 13.8 13.5 102
Timber Creek 7950 6.0 4.9 122 7.0 7.2 97
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Basin Index (%) 113 100
SHOSHONE RIVER
Blackwater 9780 22.6 22.4 101 22.7 20.1 113
Evening Star 9200 27.9 23.8 117 30.0 26.7 112
Marquette 8760 7.1 -M * 8.7 -M *
Sylvan Lake 8420 22.0 19.3 114 23.7 21.8 109
Sylvan Road 7120 12.6 10.9 116 -M 16.4 *
Younts Peak 8350 17.9 14.3 125 14.2 15.4 92
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Basin Index (%) 114 108
POWDER RIVER
Bear Trap Meadow 8200 8.9 5.0 178 9.4 8.3 113
Cloud Peak Reservoir 9860 14.3 14.6 98 13.5 13.0 104
Grave Springs 8550 10.0 9.2 109 10.3 10.3 100
Hansen Sawmill 8360 7.6 6.2 123 8.7 8.4 104
Middle Powder 7760 12.6 11.8 107 11.8 11.4 104
Powder River Pass 9480 12.1 10.1 120 12.3 12.3 100
Soldier Park 8720 7.3 -M * 8.7 -M *
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Basin Index (%) 115 104
TONGUE RIVER
Big Goose 7990 8.8 9.4 94 9.6 11.2 86
Bone Springs Div 9350 17.3 16.6 104 14.3 15.2 94
Burgess Junction 7880 11.3 11.7 97 12.4 12.1 102
Dome Lake 8880 13.5 11.7 115 9.5 13.3 71
Little Goose 8870 10.7 -M * 8.2 -M *
Sucker Creek 8880 13.4 11.9 113 12.7 14.1 90
Tie Creek 6870 8.5 5.5 155 12.7 11.4 111
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Basin Index (%) 109 92
BELLE FOURCHE
Blind Park 6890 6.3 7.1 89 8.3 11.6 72
Cole Canyon 5910 -M 5.5 * -M 9.2 *
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Basin Index (%) 89 72
CHEYENNE RIVER BASIN
Blind Park 6890 6.3 7.1 89 8.3 11.6 72
North Rapid Creek 6130 7.6 6.7 113 8.3 9.6 86
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Basin Index (%) 101 78
UPPER N. PLATTE
Arapaho Ridge 10960 23.0 20.6 112 22.1 22.0 100
Blackhall Mtn 9820 30.9 -M * 29.2 -M *
Columbine 9160 30.3 23.3 130 28.3 25.1 113
Divide Peak 8880 21.6 19.8 109 21.8 21.1 103
Joe Wright 10120 22.6 20.8 109 26.6 25.4 105
Laprele Creek 8375 12.8 9.4 136 13.1 12.3 107
Med Bow 10500 43.6 -M * 35.2 -M *
Never Summer 10280 20.2 20.2 100 15.2 -M *
North French Creek 10130 33.6 29.0 116 32.0 26.3 122
Old Battle 10000 32.3 30.9 105 29.1 34.4 85
Rawah 9020 12.2 10.5 116 14.4 13.9 104
Sage Creek Basin 7850 16.0 12.4 129 12.5 14.2 88
Sand Lake 10050 30.0 28.5 105 27.2 24.3 112
South Brush Creek 8440 12.9 12.0 108 13.2 15.0 88
Tower 10500 46.2 45.3 102 40.9 39.2 104
Webber Springs 9250 23.0 23.0 100 25.2 26.3 96
Whiskey Park 8950 33.2 27.1 123 31.5 27.4 115
Willow Creek Pass 9540 13.7 12.0 114 12.8 13.2 97
Zirkel 9340 29.0 26.3 110 30.8 27.9 110
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Basin Index (%) 111 104
SWEETWATER
Deer Park 9700 14.1 15.2 93 12.9 19.4 66
Larsen Creek 9000 7.3 11.8 62 9.0 -M *
South Pass 9040 12.4 15.1 82 10.9 17.1 64
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Basin Index (%) 80 65
LOWER N. PLATTE
Casper Mtn. 7900 16.7 14.2 118 11.9 14.6 82
Laprele Creek 8375 12.8 9.4 136 13.1 12.3 107
Reno Hill 8400 17.4 13.9 125 17.4 15.1 115
Windy Peak 7900 10.0 7.8 128 9.0 10.3 87
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Basin Index (%) 126 98
LARAMIE RIVER
Brooklyn Lake 10240 27.8 21.3 131 26.3 20.8 126
Cinnabar Park 9574 23.0 20.9 110 25.4 23.8 107
Crow Creek 8330 7.7 7.0 110 10.7 10.6 101
Deadman Hill 10220 18.7 15.9 118 16.5 17.0 97
Rawah 9020 12.2 10.5 116 14.4 13.9 104
Roach 9700 15.4 16.3 94 15.9 18.9 84
Windy Peak 7900 10.0 7.8 128 9.0 10.3 87
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Basin Index (%) 115 103
S. PLATTE
Black Mountain 8920 10.6 -M * 13.1 -M *
Crow Creek 8330 7.7 7.0 110 10.7 10.6 101
Deadman Hill 10220 18.7 15.9 118 16.5 17.0 97
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Basin Index (%) 115 99
LITTLE SNAKE RIVER
Battle Mountain 7440 12.4 10.1 123 14.6 14.8 99
Divide Peak 8880 21.6 19.8 109 21.8 21.1 103
Elk River 8700 21.1 19.1 110 18.1 19.7 92
Little Snake River 8915 28.5 24.6 116 32.6 29.1 112
Old Battle 10000 32.3 30.9 105 29.1 34.4 85
Sage Creek Basin 7850 16.0 12.4 129 12.5 14.2 88
Sandstone RS 8150 17.2 12.8 134 16.3 18.0 91
Whiskey Park 8950 33.2 27.1 123 31.5 27.4 115
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Basin Index (%) 116 99
UPPER GREEN RIVER
Big Sandy Opening 9080 10.2 12.5 82 8.9 13.0 68
Blind Bull Sum 8650 26.0 23.1 113 15.7 19.2 82
East Rim Divide 7930 12.1 10.2 119 9.8 11.5 85
Elkhart Park G.S. 9400 10.6 12.2 87 10.4 13.0 80
Gros Ventre Summit 8750 12.5 13.0 96 12.1 12.7 95
Gunsight Pass 9820 13.4 13.6 99 13.2 13.5 98
Indian Creek 9425 23.8 24.5 97 16.6 22.2 75
Kendall R.S. 7740 10.9 11.5 95 11.0 14.0 79
Loomis Park 8240 14.8 13.9 106 18.1 17.0 106
New Fork Lake 8340 10.6 10.3 103 9.1 10.6 86
Pocket Creek 9360 -M -M * 8.4 -M *
Snider Basin 8060 13.1 12.3 107 14.1 14.0 101
Spring Creek Divide 9000 26.7 22.5 119 24.9 23.4 106
Triple Peak 8500 27.2 21.9 124 26.7 24.9 107
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Basin Index (%) 105 91
LOWER GREEN RIVER
Blacks Fork Jct 8869 8.8 -M * 12.1 -M *
Buck Pasture 9632 18.3 -M * 17.3 -M *
EF Blacks Fork GS 9360 14.8 -M * 12.0 -M *
Hams Fork 7840 12.9 10.9 118 11.7 11.2 104
Hewinta 9500 12.5 11.0 114 14.8 13.8 107
Hickerson Park 9122 11.2 7.8 144 11.8 10.1 117
Hole-in-Rock 9168 12.0 7.0 171 11.5 9.5 121
Indian Creek 9425 23.8 24.5 97 16.6 22.2 75
Kelley R.S. 8180 16.0 14.9 107 16.5 17.8 93
Spirit Lk 10235 18.0 -M * 18.4 -M *
Steel Creek Park 10158 17.4 15.6 112 18.0 16.2 111
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Basin Index (%) 115 100
UPPER BEAR RIVER
Bear River RS 8777 11.3 -M * 11.6 -M *
Bug Lake 7987 20.0 18.3 109 18.8 19.1 98
Burts Miller Ranch 8000 6.8 -M * 7.3 -M *
Chalk Creek #1 9171 21.0 24.1 87 19.4 24.8 78
Hayden Fork 9130 17.5 15.4 114 20.4 20.7 99
Kelley R.S. 8180 16.0 14.9 107 16.5 17.8 93
Lily Lake 9133 12.5 12.5 100 13.1 16.8 78
Monte Cristo 8932 29.8 27.4 109 26.3 25.5 103
Salt River Summit 7640 16.1 12.9 125 16.1 16.4 98
Spring Creek Divide 9000 26.7 22.5 119 24.9 23.4 106
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Basin Index (%) 108 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.