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: MARCH 4 , 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 13.6 13.6 100 14.1 17.5 81
Black Bear 8170 26.7 30.1 89 25.0 31.6 79
Blind Bull Sum 8650 21.0 18.3 115 12.4 16.3 76
Cottonwood Creek 7670 22.9 17.4 132 24.1 19.9 121
East Rim Divide 7930 10.5 8.5 124 8.2 9.7 85
Grand Targhee 9260 34.2 30.6 112 24.2 25.2 96
Granite Creek 6770 13.8 14.0 99 -M 16.8 *
Grassy Lake 7265 26.3 26.6 99 26.3 30.0 88
Gros Ventre Summit 8750 9.4 10.1 93 9.3 10.3 90
Gunsight Pass 9820 10.6 10.8 98 10.6 11.0 96
Lewis Lake Divide 7850 20.2 25.4 80 23.6 29.4 80
Phillips Bench 8200 23.5 20.0 118 22.8 23.2 98
Salt River Summit 7640 12.7 10.7 119 12.9 13.7 94
Snake River Station 6920 14.1 14.4 98 16.5 18.9 87
Spring Creek Divide 9000 21.8 19.0 115 20.8 19.6 106
Thumb Divide 7980 11.6 12.4 94 11.6 15.0 77
Togwotee Pass 9580 22.6 18.3 123 21.7 19.8 110
Two Ocean Plateau 9240 23.6 21.8 108 19.1 22.1 86
Willow Creek 8080 29.2 22.9 128 28.7 27.3 105
Younts Peak 8350 14.8 11.8 125 11.8 12.9 91
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Basin Index (%) 107 92
MADISON-GALLATIN
Black Bear 8170 26.7 30.1 89 25.0 31.6 79
Canyon 7870 11.2 10.8 104 11.4 13.3 86
Madison Plateau 7750 16.6 18.1 92 14.4 21.7 66
West Yellowstone 6700 8.9 9.1 98 7.5 11.9 63
Whiskey Creek 6800 11.9 12.2 98 13.6 16.6 82
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Basin Index (%) 94 76
YELLOWSTONE
Beartooth Lake 9360 18.5 17.3 107 17.1 16.0 107
Burnt Mtn 5880 5.5 4.1 134 10.9 9.7 112
Canyon 7870 11.2 10.8 104 11.4 13.3 86
Cole Creek 7850 14.2 10.4 137 10.8 9.3 116
Evening Star 9200 22.6 19.6 115 24.7 22.5 110
Fisher Creek 9100 25.6 26.1 98 26.4 26.0 102
Northeast Entrance 7350 9.0 8.4 107 10.1 10.0 101
Parker Peak 9400 21.2 16.2 131 19.4 14.3 136
Sylvan Lake 8420 16.9 16.1 105 18.7 18.3 102
Thumb Divide 7980 11.6 12.4 94 11.6 15.0 77
Two Ocean Plateau 9240 23.6 21.8 108 19.1 22.1 86
White Mill 8700 20.9 18.6 112 17.2 19.3 89
Wolverine 7650 11.6 8.6 135 11.1 10.1 110
Younts Peak 8350 14.8 11.8 125 11.8 12.9 91
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Basin Index (%) 112 101
WIND RIVER
Burroughs Creek 8750 10.2 -M * 11.7 -M *
Castle Creek 8400 4.6 -M * 5.2 -M *
Cold Springs 9630 6.4 5.6 114 6.1 7.6 80
Deer Park 9700 10.3 10.9 94 9.1 15.5 59
Hobbs Park 10100 10.9 10.0 109 9.3 9.7 96
Kirwin 9550 9.3 7.2 129 8.1 8.9 91
Little Warm 9370 9.5 8.2 116 7.7 10.0 77
Owl Creek 8975 5.5 4.0 138 5.8 4.4 132
South Pass 9040 9.2 11.8 78 8.1 13.7 59
St. Lawrence Alt 8620 4.5 5.4 83 5.9 6.6 89
Togwotee Pass 9580 22.6 18.3 123 21.7 19.8 110
Townsend Creek 8700 7.8 6.8 115 7.8 8.8 89
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Basin Index (%) 109 85
BIGHORN BASIN
Bald Mtn. 9380 18.6 15.2 122 14.2 13.3 107
Bear Trap Meadow 8200 8.3 4.5 184 8.3 6.3 132
Bone Springs Div 9350 14.9 12.5 119 12.2 12.0 102
Grave Springs 8550 9.2 7.1 130 9.6 8.0 120
Kirwin 9550 9.3 7.2 129 8.1 8.9 91
Marquette 8760 6.0 -M * 7.5 -M *
Middle Powder 7760 11.3 8.3 136 11.0 8.9 124
Owl Creek 8975 5.5 4.0 138 5.8 4.4 132
Powder River Pass 9480 11.1 8.1 137 11.0 9.8 112
Shell Creek 9580 12.6 11.9 106 12.1 10.8 112
Timber Creek 7950 5.2 3.9 133 5.9 5.4 109
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Basin Index (%) 128 112
SHOSHONE RIVER
Blackwater 9780 18.0 17.7 102 18.2 16.4 111
Evening Star 9200 22.6 19.6 115 24.7 22.5 110
Marquette 8760 6.0 -M * 7.5 -M *
Sylvan Lake 8420 16.9 16.1 105 18.7 18.3 102
Sylvan Road 7120 10.4 9.7 107 -M 14.1 *
Younts Peak 8350 14.8 11.8 125 11.8 12.9 91
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Basin Index (%) 110 105
POWDER RIVER
Bear Trap Meadow 8200 8.3 4.5 184 8.3 6.3 132
Cloud Peak Reservoir 9860 11.8 10.6 111 11.2 9.8 114
Grave Springs 8550 9.2 7.1 130 9.6 8.0 120
Hansen Sawmill 8360 6.2 4.7 132 7.3 6.2 118
Middle Powder 7760 11.3 8.3 136 11.0 8.9 124
Powder River Pass 9480 11.1 8.1 137 11.0 9.8 112
Soldier Park 8720 5.1 -M * 7.3 -M *
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Basin Index (%) 134 119
TONGUE RIVER
Big Goose 7990 7.6 6.3 121 8.3 8.0 104
Bone Springs Div 9350 14.9 12.5 119 12.2 12.0 102
Burgess Junction 7880 9.8 8.6 114 10.9 9.2 118
Dome Lake 8880 11.3 8.8 128 8.1 10.1 80
Little Goose 8870 9.1 -M * 7.1 -M *
Sucker Creek 8880 11.9 9.2 129 11.0 10.8 102
Tie Creek 6870 7.7 4.4 175 11.4 8.6 133
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Basin Index (%) 127 105
BELLE FOURCHE
Blind Park 6890 7.7 6.4 120 7.6 9.6 79
Cole Canyon 5910 -M 4.9 * -M 7.2 *
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Basin Index (%) 120 79
CHEYENNE RIVER BASIN
Blind Park 6890 7.7 6.4 120 7.6 9.6 79
North Rapid Creek 6130 7.1 6.0 118 7.5 7.7 97
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Basin Index (%) 119 87
UPPER N. PLATTE
Arapaho Ridge 10960 19.1 17.0 112 18.4 18.0 102
Blackhall Mtn 9820 25.1 -M * 24.5 -M *
Columbine 9160 27.6 20.2 137 25.6 20.6 124
Divide Peak 8880 18.0 16.3 110 18.7 17.0 110
Joe Wright 10120 18.3 17.1 107 22.8 20.2 113
Laprele Creek 8375 11.1 7.8 142 11.3 9.5 119
Med Bow 10500 37.9 -M * 30.6 -M *
Never Summer 10280 16.7 16.3 102 12.2 -M *
North French Creek 10130 29.4 21.3 138 28.4 21.3 133
Old Battle 10000 26.3 24.3 108 24.2 28.3 86
Rawah 9020 11.2 8.9 126 12.7 11.1 114
Sage Creek Basin 7850 13.7 10.7 128 10.8 11.9 91
Sand Lake 10050 25.2 21.4 118 23.2 19.1 121
South Brush Creek 8440 11.7 10.6 110 11.6 11.9 97
Tower 10500 39.4 36.9 107 35.6 32.4 110
Webber Springs 9250 18.6 19.0 98 20.1 21.4 94
Whiskey Park 8950 29.6 22.0 135 27.9 22.7 123
Willow Creek Pass 9540 11.1 9.7 114 10.5 10.5 100
Zirkel 9340 24.8 23.6 105 -M 23.6 *
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Basin Index (%) 116 109
SWEETWATER
Deer Park 9700 10.3 10.9 94 9.1 15.5 59
Larsen Creek 9000 4.7 9.8 48 6.4 -M *
South Pass 9040 9.2 11.8 78 8.1 13.7 59
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Basin Index (%) 74 59
LOWER N. PLATTE
Casper Mtn. 7900 14.2 10.6 134 9.5 11.3 84
Laprele Creek 8375 11.1 7.8 142 11.3 9.5 119
Reno Hill 8400 14.8 10.5 141 15.0 11.3 133
Windy Peak 7900 8.8 5.9 149 7.4 7.9 94
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Basin Index (%) 141 108
LARAMIE RIVER
Brooklyn Lake 10240 23.6 15.5 152 22.8 16.3 140
Cinnabar Park 9574 21.1 17.4 121 23.0 19.8 116
Crow Creek 8330 6.9 6.8 101 9.3 7.9 118
Deadman Hill 10220 15.5 12.6 123 13.6 13.0 105
Rawah 9020 11.2 8.9 126 12.7 11.1 114
Roach 9700 12.4 12.6 98 12.4 14.9 83
Windy Peak 7900 8.8 5.9 149 7.4 7.9 94
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Basin Index (%) 125 111
S. PLATTE
Black Mountain 8920 9.0 -M * 11.0 -M *
Crow Creek 8330 6.9 6.8 101 9.3 7.9 118
Deadman Hill 10220 15.5 12.6 123 13.6 13.0 105
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Basin Index (%) 115 110
LITTLE SNAKE RIVER
Battle Mountain 7440 12.5 10.0 125 12.7 12.3 103
Divide Peak 8880 18.0 16.3 110 18.7 17.0 110
Elk River 8700 18.4 16.0 115 15.5 16.2 96
Little Snake River 8915 24.2 19.9 122 28.5 25.2 113
Old Battle 10000 26.3 24.3 108 24.2 28.3 86
Sage Creek Basin 7850 13.7 10.7 128 10.8 11.9 91
Sandstone RS 8150 14.8 10.9 136 13.7 15.3 90
Whiskey Park 8950 29.6 22.0 135 27.9 22.7 123
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Basin Index (%) 121 102
UPPER GREEN RIVER
Big Sandy Opening 9080 7.8 10.3 76 6.7 10.7 63
Blind Bull Sum 8650 21.0 18.3 115 12.4 16.3 76
East Rim Divide 7930 10.5 8.5 124 8.2 9.7 85
Elkhart Park G.S. 9400 9.0 9.6 94 8.5 10.7 79
Gros Ventre Summit 8750 9.4 10.1 93 9.3 10.3 90
Gunsight Pass 9820 10.6 10.8 98 10.6 11.0 96
Indian Creek 9425 19.1 19.2 99 13.6 18.2 75
Kendall R.S. 7740 8.8 9.9 89 8.8 11.9 74
Loomis Park 8240 12.4 12.0 103 15.0 14.3 105
New Fork Lake 8340 9.0 8.4 107 -M 8.9 *
Pocket Creek 9360 -M -M * 6.5 -M *
Snider Basin 8060 11.8 10.0 118 12.3 11.7 105
Spring Creek Divide 9000 21.8 19.0 115 20.8 19.6 106
Triple Peak 8500 22.3 17.4 128 22.4 20.6 109
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Basin Index (%) 106 90
LOWER GREEN RIVER
Blacks Fork Jct 8869 6.5 -M * 9.9 -M *
Buck Pasture 9632 15.1 -M * 14.6 -M *
EF Blacks Fork GS 9360 12.3 -M * 8.0 -M *
Hams Fork 7840 11.0 9.5 116 9.6 9.3 103
Hewinta 9500 9.2 8.1 114 11.8 11.0 107
Hickerson Park 9122 9.0 6.1 148 9.3 7.7 121
Hole-in-Rock 9168 8.9 5.7 156 8.8 7.2 122
Indian Creek 9425 19.1 19.2 99 13.6 18.2 75
Kelley R.S. 8180 13.1 12.2 107 13.9 14.8 94
Spirit Lk 10235 13.6 -M * 14.4 -M *
Steel Creek Park 10158 14.2 11.8 120 15.0 12.6 119
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Basin Index (%) 116 101
UPPER BEAR RIVER
Bear River RS 8777 7.9 -M * 8.9 -M *
Bug Lake 7987 16.3 15.2 107 15.1 15.8 96
Burts Miller Ranch 8000 5.7 -M * 5.8 -M *
Chalk Creek #1 9171 16.5 18.7 88 15.4 19.9 77
Hayden Fork 9130 13.9 12.4 112 16.9 16.7 101
Kelley R.S. 8180 13.1 12.2 107 13.9 14.8 94
Lily Lake 9133 9.9 10.6 93 10.0 13.5 74
Monte Cristo 8932 23.0 21.7 106 20.4 20.9 98
Salt River Summit 7640 12.7 10.7 119 12.9 13.7 94
Spring Creek Divide 9000 21.8 19.0 115 20.8 19.6 106
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Basin Index (%) 106 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.