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 MONDAY: MARCH 30 , 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 16.1 14.7 110 16.7 20.0 84
Black Bear 8170 32.1 35.7 90 30.0 36.3 83
Blind Bull Sum 8650 24.0 22.0 109 14.6 18.6 78
Cottonwood Creek 7670 25.5 21.0 121 27.5 23.4 118
East Rim Divide 7930 11.5 9.9 116 9.1 11.2 81
Grand Targhee 9260 39.1 35.7 110 27.5 28.8 95
Granite Creek 6770 16.1 15.0 107 15.1 18.9 80
Grassy Lake 7265 31.0 31.5 98 30.8 34.3 90
Gros Ventre Summit 8750 11.6 12.7 91 11.3 12.2 93
Gunsight Pass 9820 12.5 13.2 95 12.4 13.0 95
Lewis Lake Divide 7850 24.3 29.4 83 28.4 33.8 84
Phillips Bench 8200 27.9 23.9 117 27.1 26.8 101
Salt River Summit 7640 14.8 12.7 117 15.0 15.8 95
Snake River Station 6920 16.5 15.8 104 19.7 21.5 92
Spring Creek Divide 9000 24.9 22.4 111 23.4 22.7 103
Thumb Divide 7980 15.3 15.0 102 14.9 17.6 85
Togwotee Pass 9580 25.9 21.5 120 25.0 23.0 109
Two Ocean Plateau 9240 28.5 25.4 112 22.9 25.9 88
Willow Creek 8080 35.0 27.3 128 33.1 31.8 104
Younts Peak 8350 16.6 14.0 119 13.1 15.0 87
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Basin Index (%) 107 93
MADISON-GALLATIN
Black Bear 8170 32.1 35.7 90 30.0 36.3 83
Canyon 7870 14.2 12.3 115 14.4 15.4 94
Madison Plateau 7750 20.4 21.2 96 18.0 25.0 72
West Yellowstone 6700 10.8 10.2 106 8.7 13.4 65
Whiskey Creek 6800 14.6 14.9 98 16.5 19.2 86
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Basin Index (%) 98 80
YELLOWSTONE
Beartooth Lake 9360 21.8 20.8 105 20.3 18.6 109
Burnt Mtn 5880 7.5 4.4 170 13.1 11.8 111
Canyon 7870 14.2 12.3 115 14.4 15.4 94
Cole Creek 7850 16.2 13.2 123 12.7 11.8 108
Evening Star 9200 25.7 23.9 108 27.9 25.8 108
Fisher Creek 9100 30.6 29.7 103 31.4 30.2 104
Northeast Entrance 7350 10.5 9.7 108 11.9 11.6 103
Parker Peak 9400 24.2 18.6 130 22.0 16.7 132
Sylvan Lake 8420 20.1 19.0 106 21.9 21.1 104
Thumb Divide 7980 15.3 15.0 102 14.9 17.6 85
Two Ocean Plateau 9240 28.5 25.4 112 22.9 25.9 88
White Mill 8700 24.8 21.4 116 20.7 22.5 92
Wolverine 7650 12.1 9.0 134 12.1 11.5 105
Younts Peak 8350 16.6 14.0 119 13.1 15.0 87
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Basin Index (%) 113 101
WIND RIVER
Burroughs Creek 8750 11.8 -M * 12.9 -M *
Castle Creek 8400 5.2 -M * 5.8 -M *
Cold Springs 9630 7.2 7.1 101 6.3 9.4 67
Deer Park 9700 12.7 14.5 88 11.5 18.5 62
Hobbs Park 10100 12.4 13.1 95 10.5 12.3 85
Kirwin 9550 10.3 9.2 112 9.2 10.9 84
Little Warm 9370 11.2 10.1 111 8.9 12.1 74
Owl Creek 8975 5.9 5.2 113 6.3 5.6 112
South Pass 9040 11.3 14.7 77 9.7 16.4 59
St. Lawrence Alt 8620 5.0 6.7 75 6.5 8.3 78
Togwotee Pass 9580 25.9 21.5 120 25.0 23.0 109
Townsend Creek 8700 8.6 8.8 98 8.7 11.1 78
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Basin Index (%) 100 80
BIGHORN BASIN
Bald Mtn. 9380 19.8 18.1 109 15.4 16.0 96
Bear Trap Meadow 8200 8.6 5.1 169 8.8 7.9 111
Bone Springs Div 9350 16.6 15.4 108 13.7 14.6 94
Grave Springs 8550 9.7 8.7 111 10.0 9.8 102
Kirwin 9550 10.3 9.2 112 9.2 10.9 84
Marquette 8760 6.5 -M * 8.1 -M *
Middle Powder 7760 12.0 11.0 109 11.3 10.9 104
Owl Creek 8975 5.9 5.2 113 6.3 5.6 112
Powder River Pass 9480 12.0 9.9 121 12.0 11.8 102
Shell Creek 9580 14.1 14.2 99 13.4 13.0 103
Timber Creek 7950 5.3 4.6 115 6.3 6.9 91
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Basin Index (%) 113 99
SHOSHONE RIVER
Blackwater 9780 20.7 21.8 95 21.1 19.4 109
Evening Star 9200 25.7 23.9 108 27.9 25.8 108
Marquette 8760 6.5 -M * 8.1 -M *
Sylvan Lake 8420 20.1 19.0 106 21.9 21.1 104
Sylvan Road 7120 11.8 11.1 106 -M 16.0 *
Younts Peak 8350 16.6 14.0 119 13.1 15.0 87
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Basin Index (%) 106 103
POWDER RIVER
Bear Trap Meadow 8200 8.6 5.1 169 8.8 7.9 111
Cloud Peak Reservoir 9860 13.6 13.9 98 12.7 12.4 102
Grave Springs 8550 9.7 8.7 111 10.0 9.8 102
Hansen Sawmill 8360 7.3 6.3 116 8.2 8.0 102
Middle Powder 7760 12.0 11.0 109 11.3 10.9 104
Powder River Pass 9480 12.0 9.9 121 12.0 11.8 102
Soldier Park 8720 6.6 -M * 8.2 -M *
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Basin Index (%) 115 104
TONGUE RIVER
Big Goose 7990 8.6 8.6 100 9.2 10.4 88
Bone Springs Div 9350 16.6 15.4 108 13.7 14.6 94
Burgess Junction 7880 10.8 11.1 97 11.8 11.5 103
Dome Lake 8880 13.0 11.4 114 9.1 12.7 72
Little Goose 8870 10.4 -M * 7.9 -M *
Sucker Creek 8880 13.1 11.3 116 12.3 13.4 92
Tie Creek 6870 8.0 5.4 148 12.2 10.7 114
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Basin Index (%) 111 93
BELLE FOURCHE
Blind Park 6890 6.7 7.2 93 7.9 11.1 71
Cole Canyon 5910 -M 5.8 * -M 8.5 *
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Basin Index (%) 93 71
CHEYENNE RIVER BASIN
Blind Park 6890 6.7 7.2 93 7.9 11.1 71
North Rapid Creek 6130 7.4 6.7 110 7.9 9.1 87
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Basin Index (%) 101 78
UPPER N. PLATTE
Arapaho Ridge 10960 22.8 19.4 118 21.8 21.0 104
Blackhall Mtn 9820 30.1 -M * 28.7 -M *
Columbine 9160 30.7 22.4 137 28.1 24.1 117
Divide Peak 8880 21.0 19.3 109 21.3 20.2 105
Joe Wright 10120 -M 20.0 * -M 24.3 *
Laprele Creek 8375 12.4 9.4 132 12.4 11.6 107
Med Bow 10500 43.3 -M * 35.0 -M *
Never Summer 10280 19.9 19.2 104 14.8 -M *
North French Creek 10130 33.2 27.5 121 31.7 25.3 125
Old Battle 10000 31.8 28.9 110 28.9 33.1 87
Rawah 9020 12.8 10.2 125 13.9 13.3 105
Sage Creek Basin 7850 16.2 12.6 129 12.1 13.6 89
Sand Lake 10050 29.2 27.0 108 26.7 23.2 115
South Brush Creek 8440 13.8 12.2 113 12.9 14.4 90
Tower 10500 45.8 43.2 106 40.7 37.7 108
Webber Springs 9250 22.9 22.7 101 24.7 25.3 98
Whiskey Park 8950 32.7 25.2 130 31.0 26.5 117
Willow Creek Pass 9540 13.3 11.6 115 12.5 12.6 99
Zirkel 9340 28.8 26.3 110 30.4 26.9 113
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Basin Index (%) 115 106
SWEETWATER
Deer Park 9700 12.7 14.5 88 11.5 18.5 62
Larsen Creek 9000 6.0 12.0 50 7.9 -M *
South Pass 9040 11.3 14.7 77 9.7 16.4 59
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Basin Index (%) 73 61
LOWER N. PLATTE
Casper Mtn. 7900 15.4 13.0 118 10.6 13.8 77
Laprele Creek 8375 12.4 9.4 132 12.4 11.6 107
Reno Hill 8400 16.5 12.8 129 16.6 14.3 116
Windy Peak 7900 9.9 7.8 127 8.7 9.8 89
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Basin Index (%) 126 98
LARAMIE RIVER
Brooklyn Lake 10240 27.5 19.4 142 26.0 19.8 131
Cinnabar Park 9574 23.0 19.7 117 25.3 22.8 111
Crow Creek 8330 7.6 6.8 112 10.6 10.0 106
Deadman Hill 10220 18.4 15.2 121 16.2 16.2 100
Rawah 9020 12.8 10.2 125 13.9 13.3 105
Roach 9700 15.3 15.2 101 15.5 18.0 86
Windy Peak 7900 9.9 7.8 127 8.7 9.8 89
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Basin Index (%) 121 106
S. PLATTE
Black Mountain 8920 10.9 -M * 12.9 -M *
Crow Creek 8330 7.6 6.8 112 10.6 10.0 106
Deadman Hill 10220 18.4 15.2 121 16.2 16.2 100
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Basin Index (%) 118 102
LITTLE SNAKE RIVER
Battle Mountain 7440 12.9 10.8 119 14.0 14.3 98
Divide Peak 8880 21.0 19.3 109 21.3 20.2 105
Elk River 8700 20.6 18.1 114 17.6 19.0 93
Little Snake River 8915 28.2 22.6 125 32.1 27.9 115
Old Battle 10000 31.8 28.9 110 28.9 33.1 87
Sage Creek Basin 7850 16.2 12.6 129 12.1 13.6 89
Sandstone RS 8150 17.6 13.1 134 15.9 17.5 91
Whiskey Park 8950 32.7 25.2 130 31.0 26.5 117
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Basin Index (%) 120 100
UPPER GREEN RIVER
Big Sandy Opening 9080 9.1 12.2 75 7.9 12.5 63
Blind Bull Sum 8650 24.0 22.0 109 14.6 18.6 78
East Rim Divide 7930 11.5 9.9 116 9.1 11.2 81
Elkhart Park G.S. 9400 10.0 11.8 85 9.8 12.6 78
Gros Ventre Summit 8750 11.6 12.7 91 11.3 12.2 93
Gunsight Pass 9820 12.5 13.2 95 12.4 13.0 95
Indian Creek 9425 22.2 23.5 94 15.6 21.4 73
Kendall R.S. 7740 10.4 11.4 91 10.2 13.6 75
Loomis Park 8240 13.9 14.4 97 16.9 16.5 102
New Fork Lake 8340 10.4 10.2 102 8.2 10.3 80
Pocket Creek 9360 -M -M * 7.6 -M *
Snider Basin 8060 12.8 12.0 107 13.4 13.5 99
Spring Creek Divide 9000 24.9 22.4 111 23.4 22.7 103
Triple Peak 8500 25.4 21.3 119 25.0 24.1 104
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Basin Index (%) 101 88
LOWER GREEN RIVER
Blacks Fork Jct 8869 8.4 -M * 11.9 -M *
Buck Pasture 9632 18.0 -M * 17.0 -M *
EF Blacks Fork GS 9360 14.3 -M * 11.6 -M *
Hams Fork 7840 12.6 10.7 118 11.1 10.8 103
Hewinta 9500 11.5 10.6 108 14.4 13.2 109
Hickerson Park 9122 11.0 7.3 151 11.6 9.5 122
Hole-in-Rock 9168 11.6 7.0 166 11.2 9.0 124
Indian Creek 9425 22.2 23.5 94 15.6 21.4 73
Kelley R.S. 8180 15.3 14.7 104 15.8 17.3 91
Spirit Lk 10235 17.9 -M * 18.2 -M *
Steel Creek Park 10158 17.2 14.8 116 17.7 15.4 115
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Basin Index (%) 114 101
UPPER BEAR RIVER
Bear River RS 8777 10.4 -M * 11.2 -M *
Bug Lake 7987 19.2 18.0 107 18.1 18.4 98
Burts Miller Ranch 8000 6.3 -M * 7.0 -M *
Chalk Creek #1 9171 20.6 23.0 90 18.8 23.8 79
Hayden Fork 9130 17.1 14.9 115 20.1 19.9 101
Kelley R.S. 8180 15.3 14.7 104 15.8 17.3 91
Lily Lake 9133 12.2 11.9 103 12.7 16.1 79
Monte Cristo 8932 29.1 25.8 113 25.5 24.6 104
Salt River Summit 7640 14.8 12.7 117 15.0 15.8 95
Spring Creek Divide 9000 24.9 22.4 111 23.4 22.7 103
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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.
